add more atmel studio framework code

23 files changed, 3722 insertions, 0 deletions

diff --git a/watch-library/config/hpl_nvmctrl_config.h b/watch-library/config/hpl_nvmctrl_config.h
new file mode 100755
index 00000000..76d49bac
--- /dev/null
+++ b/watch-library/config/hpl_nvmctrl_config.h
@@ -0,0 +1,38 @@
+/* Auto-generated config file hpl_nvmctrl_config.h */
+#ifndef HPL_NVMCTRL_CONFIG_H
+#define HPL_NVMCTRL_CONFIG_H
+
+// <<< Use Configuration Wizard in Context Menu >>>
+
+// <h> Basic Settings
+
+// <o> Read Mode Selection
+// <0x00=> No Miss Penalty
+// <0x01=> Low Power
+// <0x02=> Deterministic
+// <id> nvm_arch_read_mode
+#ifndef CONF_NVM_READ_MODE
+#define CONF_NVM_READ_MODE 1
+#endif
+
+// <o> Power Reduction Mode During Sleep
+// <0x00=> Wake On Access
+// <0x01=> Wake Up Instant
+// <0x03=> Disabled
+// <id> nvm_arch_sleepprm
+#ifndef CONF_NVM_SLEEPPRM
+#define CONF_NVM_SLEEPPRM 0
+#endif
+
+// <q> Cache Disable
+// <i> Indicate whether cache is disable or not
+// <id> nvm_arch_cache
+#ifndef CONF_NVM_CACHE
+#define CONF_NVM_CACHE 0
+#endif
+
+// </h>
+
+// <<< end of configuration section >>>
+
+#endif // HPL_NVMCTRL_CONFIG_H
diff --git a/watch-library/config/hpl_sercom_config.h b/watch-library/config/hpl_sercom_config.h
index ad16e642..a0eb1206 100644
--- a/watch-library/config/hpl_sercom_config.h
+++ b/watch-library/config/hpl_sercom_config.h
@@ -139,6 +139,165 @@
 #endif
 #endif
 
+#include <peripheral_clk_config.h>
+
+// Enable configuration of module
+#ifndef CONF_SERCOM_3_SPI_ENABLE
+#define CONF_SERCOM_3_SPI_ENABLE 0
+#endif
+
+// Set module in SPI Master mode
+#ifndef CONF_SERCOM_3_SPI_MODE
+#define CONF_SERCOM_3_SPI_MODE 0x03
+#endif
+
+// <h> Basic Configuration
+
+// <q> Receive buffer enable
+// <i> Enable receive buffer to receive data from slave (RXEN)
+// <id> spi_master_rx_enable
+#ifndef CONF_SERCOM_3_SPI_RXEN
+#define CONF_SERCOM_3_SPI_RXEN 0x1
+#endif
+
+// <o> Character Size
+// <i> Bit size for all characters sent over the SPI bus (CHSIZE)
+// <0x0=>8 bits
+// <0x1=>9 bits
+// <id> spi_master_character_size
+#ifndef CONF_SERCOM_3_SPI_CHSIZE
+#define CONF_SERCOM_3_SPI_CHSIZE 0x0
+#endif
+// <o> Baud rate <1-12000000>
+// <i> The SPI data transfer rate
+// <id> spi_master_baud_rate
+#ifndef CONF_SERCOM_3_SPI_BAUD
+#define CONF_SERCOM_3_SPI_BAUD 50000
+#endif
+
+// </h>
+
+// <e> Advanced Configuration
+// <id> spi_master_advanced
+#ifndef CONF_SERCOM_3_SPI_ADVANCED
+#define CONF_SERCOM_3_SPI_ADVANCED 0
+#endif
+
+// <o> Dummy byte <0x00-0x1ff>
+// <id> spi_master_dummybyte
+// <i> Dummy byte used when reading data from the slave without sending any data
+#ifndef CONF_SERCOM_3_SPI_DUMMYBYTE
+#define CONF_SERCOM_3_SPI_DUMMYBYTE 0x1ff
+#endif
+
+// <o> Data Order
+// <0=>MSB first
+// <1=>LSB first
+// <i> I least significant or most significant bit is shifted out first (DORD)
+// <id> spi_master_arch_dord
+#ifndef CONF_SERCOM_3_SPI_DORD
+#define CONF_SERCOM_3_SPI_DORD 0x0
+#endif
+
+// <o> Clock Polarity
+// <0=>SCK is low when idle
+// <1=>SCK is high when idle
+// <i> Determines if the leading edge is rising or falling with a corresponding opposite edge at the trailing edge. (CPOL)
+// <id> spi_master_arch_cpol
+#ifndef CONF_SERCOM_3_SPI_CPOL
+#define CONF_SERCOM_3_SPI_CPOL 0x0
+#endif
+
+// <o> Clock Phase
+// <0x0=>Sample input on leading edge
+// <0x1=>Sample input on trailing edge
+// <i> Determines if input data is sampled on leading or trailing SCK edge. (CPHA)
+// <id> spi_master_arch_cpha
+#ifndef CONF_SERCOM_3_SPI_CPHA
+#define CONF_SERCOM_3_SPI_CPHA 0x0
+#endif
+
+// <o> Immediate Buffer Overflow Notification
+// <i> Controls when OVF is asserted (IBON)
+// <0x0=>In data stream
+// <0x1=>On buffer overflow
+// <id> spi_master_arch_ibon
+#ifndef CONF_SERCOM_3_SPI_IBON
+#define CONF_SERCOM_3_SPI_IBON 0x0
+#endif
+
+// <q> Run in stand-by
+// <i> Module stays active in stand-by sleep mode. (RUNSTDBY)
+// <id> spi_master_arch_runstdby
+#ifndef CONF_SERCOM_3_SPI_RUNSTDBY
+#define CONF_SERCOM_3_SPI_RUNSTDBY 0x0
+#endif
+
+// <o> Debug Stop Mode
+// <i> Behavior of the baud-rate generator when CPU is halted by external debugger. (DBGSTOP)
+// <0=>Keep running
+// <1=>Halt
+// <id> spi_master_arch_dbgstop
+#ifndef CONF_SERCOM_3_SPI_DBGSTOP
+#define CONF_SERCOM_3_SPI_DBGSTOP 0
+#endif
+
+// </e>
+
+// Address mode disabled in master mode
+#ifndef CONF_SERCOM_3_SPI_AMODE_EN
+#define CONF_SERCOM_3_SPI_AMODE_EN 0
+#endif
+
+#ifndef CONF_SERCOM_3_SPI_AMODE
+#define CONF_SERCOM_3_SPI_AMODE 0
+#endif
+
+#ifndef CONF_SERCOM_3_SPI_ADDR
+#define CONF_SERCOM_3_SPI_ADDR 0
+#endif
+
+#ifndef CONF_SERCOM_3_SPI_ADDRMASK
+#define CONF_SERCOM_3_SPI_ADDRMASK 0
+#endif
+
+#ifndef CONF_SERCOM_3_SPI_SSDE
+#define CONF_SERCOM_3_SPI_SSDE 0
+#endif
+
+#ifndef CONF_SERCOM_3_SPI_MSSEN
+#define CONF_SERCOM_3_SPI_MSSEN 0x0
+#endif
+
+#ifndef CONF_SERCOM_3_SPI_PLOADEN
+#define CONF_SERCOM_3_SPI_PLOADEN 0
+#endif
+
+// <o> Receive Data Pinout
+// <0x0=>PAD[0]
+// <0x1=>PAD[1]
+// <0x2=>PAD[2]
+// <0x3=>PAD[3]
+// <id> spi_master_rxpo
+#ifndef CONF_SERCOM_3_SPI_RXPO
+#define CONF_SERCOM_3_SPI_RXPO 2
+#endif
+
+// <o> Transmit Data Pinout
+// <0x0=>PAD[0,1]_DO_SCK
+// <0x1=>PAD[2,3]_DO_SCK
+// <0x2=>PAD[3,1]_DO_SCK
+// <0x3=>PAD[0,3]_DO_SCK
+// <id> spi_master_txpo
+#ifndef CONF_SERCOM_3_SPI_TXPO
+#define CONF_SERCOM_3_SPI_TXPO 3
+#endif
+
+// Calculate baud register value from requested baudrate value
+#ifndef CONF_SERCOM_3_SPI_BAUD_RATE
+#define CONF_SERCOM_3_SPI_BAUD_RATE ((float)CONF_GCLK_SERCOM3_CORE_FREQUENCY / (float)(2 * CONF_SERCOM_3_SPI_BAUD)) - 1
+#endif
+
 // <<< end of configuration section >>>
 
 #endif // HPL_SERCOM_CONFIG_H
diff --git a/watch-library/config/hpl_trng_config.h b/watch-library/config/hpl_trng_config.h
new file mode 100755
index 00000000..ba901498
--- /dev/null
+++ b/watch-library/config/hpl_trng_config.h
@@ -0,0 +1,27 @@
+/* Auto-generated config file hpl_trng_config.h */
+#ifndef HPL_TRNG_CONFIG_H
+#define HPL_TRNG_CONFIG_H
+
+// <<< Use Configuration Wizard in Context Menu >>>
+
+// <h> Advanced configurations
+
+// <q> Run In Standby
+// <i> Indicates whether the TRNG works in standby mode
+// <id> trng_runstdby
+#ifndef CONF_TRNG_RUNSTDBY
+#define CONF_TRNG_RUNSTDBY 0
+#endif
+
+// <q> Data Ready Event Output Enable
+// <i> Indicates whether the TRNG generates event on Data Ready
+// <id> trng_datardyeo
+#ifndef CONF_TRNG_DATARDYEO
+#define CONF_TRNG_DATARDYEO 0
+#endif
+
+// </h>
+
+// <<< end of configuration section >>>
+
+#endif // HPL_TRNG_CONFIG_H
diff --git a/watch-library/config/nv_storage_config.h b/watch-library/config/nv_storage_config.h
new file mode 100755
index 00000000..4888d1bd
--- /dev/null
+++ b/watch-library/config/nv_storage_config.h
@@ -0,0 +1,51 @@
+/* Auto-generated config file nv_storage_config.h */
+#ifndef NV_STORAGE_CONFIG_H
+#define NV_STORAGE_CONFIG_H
+
+// <<< Use Configuration Wizard in Context Menu >>>
+
+//<o> Storage start address <0x00000000-0xFFFFFFFF>
+//<i> This defines the start address of device flash for storage.
+//<i> The start address should be in device flash area.
+//<i> The start address and (start address + Item Number * Sector size) cannot beyond device flash area.
+//<id> conf_storage_memory_start
+#ifndef CONF_STORAGE_MEMORY_START
+#define CONF_STORAGE_MEMORY_START 0x10000
+#endif
+
+//<o> Item number <0-65535>
+//<i> This defines the maximum number of elements stored in persistent storage
+//<id> conf_max_item_number
+#ifndef CONF_MAX_ITEM_NUMBER
+#define CONF_MAX_ITEM_NUMBER 10
+#endif
+
+//<o> Sector size <0-65535>
+//<i> This defines the size of one storage sector in bytes
+//<id> conf_sector_size
+#ifndef CONF_SECTOR_SIZE
+#define CONF_SECTOR_SIZE 4096
+#endif
+
+/**
+ * Check If the Storage configuration out of the flash area.
+ */
+#ifdef FLASH_SIZE
+#if (CONF_STORAGE_MEMORY_START + (SECTOR_AMOUNT * CONF_SECTOR_SIZE)) > FLASH_SIZE
+#error Invalidate storage configuration, make sure the configuration with \
+the sector start address (CONF_STORAGE_MEMORY_START) and sector size (CONF_SECTOR_SIZE) \
+are located within the device flash size.
+#endif
+#endif
+
+#ifdef IFLASH_SIZE
+#if (CONF_STORAGE_MEMORY_START + (SECTOR_AMOUNT * CONF_SECTOR_SIZE)) > IFLASH_SIZE
+#error Invalidate storage configuration, make sure the configuration with \
+the sector start address (CONF_STORAGE_MEMORY_START) and sector size (CONF_SECTOR_SIZE) \
+are located within the device flash size.
+#endif
+#endif
+
+// <<< end of configuration section >>>
+
+#endif // NV_STORAGE_CONFIG_H
diff --git a/watch-library/config/peripheral_clk_config.h b/watch-library/config/peripheral_clk_config.h
index 61619b6a..523b036c 100644
--- a/watch-library/config/peripheral_clk_config.h
+++ b/watch-library/config/peripheral_clk_config.h
@@ -132,6 +132,58 @@
 #define CONF_GCLK_SERCOM1_SLOW_FREQUENCY 32768
 #endif
 
+// <y> Core Clock Source
+// <id> core_gclk_selection
+
+// <GCLK_PCHCTRL_GEN_GCLK0_Val"> Generic clock generator 0
+
+// <GCLK_PCHCTRL_GEN_GCLK1_Val"> Generic clock generator 1
+
+// <GCLK_PCHCTRL_GEN_GCLK2_Val"> Generic clock generator 2
+
+// <GCLK_PCHCTRL_GEN_GCLK3_Val"> Generic clock generator 3
+
+// <GCLK_PCHCTRL_GEN_GCLK4_Val"> Generic clock generator 4
+
+// <i> Select the clock source for CORE.
+#ifndef CONF_GCLK_SERCOM3_CORE_SRC
+#define CONF_GCLK_SERCOM3_CORE_SRC GCLK_PCHCTRL_GEN_GCLK0_Val
+#endif
+
+// <y> Slow Clock Source
+// <id> slow_gclk_selection
+
+// <GCLK_PCHCTRL_GEN_GCLK0_Val"> Generic clock generator 0
+
+// <GCLK_PCHCTRL_GEN_GCLK1_Val"> Generic clock generator 1
+
+// <GCLK_PCHCTRL_GEN_GCLK2_Val"> Generic clock generator 2
+
+// <GCLK_PCHCTRL_GEN_GCLK3_Val"> Generic clock generator 3
+
+// <GCLK_PCHCTRL_GEN_GCLK4_Val"> Generic clock generator 4
+
+// <i> Select the slow clock source.
+#ifndef CONF_GCLK_SERCOM3_SLOW_SRC
+#define CONF_GCLK_SERCOM3_SLOW_SRC GCLK_PCHCTRL_GEN_GCLK3_Val
+#endif
+
+/**
+ * \def CONF_GCLK_SERCOM3_CORE_FREQUENCY
+ * \brief SERCOM3's Core Clock frequency
+ */
+#ifndef CONF_GCLK_SERCOM3_CORE_FREQUENCY
+#define CONF_GCLK_SERCOM3_CORE_FREQUENCY 4000000
+#endif
+
+/**
+ * \def CONF_GCLK_SERCOM3_SLOW_FREQUENCY
+ * \brief SERCOM3's Slow Clock frequency
+ */
+#ifndef CONF_GCLK_SERCOM3_SLOW_FREQUENCY
+#define CONF_GCLK_SERCOM3_SLOW_FREQUENCY 32768
+#endif
+
 // <y> TC Clock Source
 // <id> tc_gclk_selection
 
diff --git a/watch-library/hal/documentation/flash.rst b/watch-library/hal/documentation/flash.rst
new file mode 100755
index 00000000..fcc86e63
--- /dev/null
+++ b/watch-library/hal/documentation/flash.rst
@@ -0,0 +1,52 @@
+The Flash Driver
+================
+
+Flash is a re-programmable memory that retains program and data
+storage even with power off.
+
+User can write or read several bytes from any valid address in a flash.
+
+As to the erase/lock/unlock command, the input parameter of address should
+be a bytes address aligned with the page start, otherwise, the command will fail
+to be executed. At the meantime, the number of pages that can be locked or unlocked
+at once depends on region size of the flash. User can get the real number
+from the function return value which could be different for the different devices.
+
+Features
+--------
+
+* Initialization/de-initialization
+* Writing/Reading bytes
+* Locking/Unlocking/Erasing pages
+* Notifications about errors or being ready for a new command
+
+Applications
+------------
+
+* Mini disk which can retain program and data storage
+* Boot loader
+* Non volatile storage
+
+Dependencies
+------------
+
+The peripheral which controls a re-programmable flash memory.
+
+Concurrency
+-----------
+
+N/A
+
+Limitations
+-----------
+
+User should pay attention to set a proper stack size in their application,
+since the driver manages a temporary buffer in stack to cache unchanged data
+when calling flash write and erase function.
+Due to flash memory architecture of SAMD21/D20/L21/L22/C20/C21/D09/D10/D11/R21,
+write operation erazes row content before each write.
+
+Known issues and workarounds
+----------------------------
+
+N/A
diff --git a/watch-library/hal/documentation/rand_sync.rst b/watch-library/hal/documentation/rand_sync.rst
new file mode 100755
index 00000000..19ec1d36
--- /dev/null
+++ b/watch-library/hal/documentation/rand_sync.rst
@@ -0,0 +1,43 @@
+==========================================
+Random Number Generator Synchronous driver
+==========================================
+
+Random Number Generator (RAND) generates a sequence of numbers that can not
+be reasonably predicted better than by a random chance.
+
+In some implementation cases, seed is required for the Random Number Generator
+to generate random numbers. rand_sync_set_seed is used to update the seed.
+If it's actually not required by the generator implementation, the function just
+returns ERR_UNSUPPORTED_OP.
+
+Features
+--------
+
+* Initialization and de-initialization
+* Enabling and Disabling
+* Setting seed
+* 8-bit and 32-bit random data/data array generation
+
+Applications
+------------
+
+* Generate random keys for data encryption
+
+Dependencies
+------------
+
+* Random number generation hardware/software
+
+Concurrency
+-----------
+N/A
+
+Limitations
+-----------
+
+N/A
+
+Known issues and workarounds
+----------------------------
+N/A
+
diff --git a/watch-library/hal/documentation/spi_master_sync.rst b/watch-library/hal/documentation/spi_master_sync.rst
new file mode 100755
index 00000000..4fbe45e2
--- /dev/null
+++ b/watch-library/hal/documentation/spi_master_sync.rst
@@ -0,0 +1,51 @@
+The SPI Master Synchronous Driver
+=================================
+
+The serial peripheral interface (SPI) is a synchronous serial communication
+interface.
+
+SPI devices communicate in full duplex mode using a master-slave
+architecture with a single master. The master device originates the frame for
+reading and writing. Multiple slave devices are supported through selection
+with individual slave select (SS) lines.
+
+Features
+--------
+
+* Initialization/de-initialization
+* Enabling/disabling
+* Control of the following settings:
+
+  * Baudrate
+  * SPI mode
+  * Character size
+  * Data order
+* Data transfer: transmission, reception and full-duplex
+
+Applications
+------------
+
+Send/receive/exchange data with a SPI slave device. E.g., serial flash, SD card,
+LCD controller, etc.
+
+Dependencies
+------------
+
+SPI master capable hardware
+
+Concurrency
+-----------
+
+N/A
+
+Limitations
+-----------
+
+The slave select (SS) is not automatically inserted during read/write/transfer,
+user must use I/O to control the devices' SS.
+
+Known issues and workarounds
+----------------------------
+
+N/A
+
diff --git a/watch-library/hal/documentation/usart_sync.rst b/watch-library/hal/documentation/usart_sync.rst
new file mode 100755
index 00000000..15e4b138
--- /dev/null
+++ b/watch-library/hal/documentation/usart_sync.rst
@@ -0,0 +1,58 @@
+The USART Synchronous Driver
+============================
+
+The universal synchronous and asynchronous receiver and transmitter
+(USART) is usually used to transfer data from one device to the other.
+
+User can set action for flow control pins by function usart_set_flow_control,
+if the flow control is enabled. All the available states are defined in union
+usart_flow_control_state.
+
+Note that user can set state of flow control pins only if automatic support of
+the flow control is not supported by the hardware.
+
+Features
+--------
+
+* Initialization/de-initialization
+* Enabling/disabling
+* Control of the following settings:
+
+  * Baudrate
+  * UART or USRT communication mode
+  * Character size
+  * Data order
+  * Flow control
+* Data transfer: transmission, reception
+
+Applications
+------------
+
+They are commonly used in a terminal application or low-speed communication
+between devices.
+
+Dependencies
+------------
+
+USART capable hardware.
+
+Concurrency
+-----------
+
+Write buffer should not be changed while data is being sent.
+
+
+Limitations
+-----------
+
+* The driver does not support 9-bit character size.
+* The "USART with ISO7816" mode can be only used in ISO7816 capable devices. 
+  And the SCK pin can't be set directly. Application can use a GCLK output PIN
+  to generate SCK. For example to communicate with a SMARTCARD with ISO7816
+  (F = 372 ; D = 1), and baudrate=9600, the SCK pin output frequency should be
+  config as 372*9600=3571200Hz. More information can be refer to ISO7816 Specification.
+
+Known issues and workarounds
+----------------------------
+
+N/A
diff --git a/watch-library/hal/include/hal_flash.h b/watch-library/hal/include/hal_flash.h
new file mode 100755
index 00000000..8216afde
--- /dev/null
+++ b/watch-library/hal/include/hal_flash.h
@@ -0,0 +1,209 @@
+/**
+ * \file
+ *
+ * \brief Flash related functionality declaration.
+ *
+ * Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#ifndef _HAL_FLASH_H_INCLUDED
+#define _HAL_FLASH_H_INCLUDED
+
+#include <hpl_flash.h>
+
+/**
+ * \addtogroup doc_driver_hal_flash
+ *
+ * @{
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Forward declaration of flash_descriptor. */
+struct flash_descriptor;
+
+/** The callback types */
+enum flash_cb_type {
+	/** Callback type for ready to accept a new command */
+	FLASH_CB_READY,
+	/** Callback type for error */
+	FLASH_CB_ERROR,
+	FLASH_CB_N
+};
+
+/** \brief Prototype of callback on FLASH
+ *
+ */
+typedef void (*flash_cb_t)(struct flash_descriptor *const descr);
+
+/** \brief FLASH HAL callbacks
+ *
+ */
+struct flash_callbacks {
+	/** Callback invoked when ready to accept a new command */
+	flash_cb_t cb_ready;
+	/** Callback invoked when error occurs */
+	flash_cb_t cb_error;
+};
+
+/** \brief FLASH HAL driver struct for asynchronous access
+ */
+struct flash_descriptor {
+	/** Pointer to FLASH device instance */
+	struct _flash_device dev;
+	/** Callbacks for asynchronous transfer */
+	struct flash_callbacks callbacks;
+};
+
+/** \brief Initialize the FLASH HAL instance and hardware for callback mode
+ *
+ *  Initialize FLASH HAL with interrupt mode (uses callbacks).
+ *
+ *  \param[in, out] flash Pointer to the HAL FLASH instance.
+ *  \param[in] hw Pointer to the hardware base.
+ *  \return Initialize status.
+ */
+int32_t flash_init(struct flash_descriptor *flash, void *const hw);
+
+/** \brief Deinitialize the FLASH HAL instance
+ *
+ *  Abort transfer, disable and reset FLASH, and deinitialize software.
+ *
+ *  \param[in, out] flash Pointer to the HAL FLASH instance.
+ *  \return Deinitialze status.
+ */
+int32_t flash_deinit(struct flash_descriptor *flash);
+
+/** \brief Writes a number of bytes to a page in the internal Flash
+ *
+ *  \param[in, out] flash Pointer to the HAL FLASH instance.
+ *  \param[in]  dst_addr  Destination bytes address to write into flash
+ *  \param[in]  buffer    Pointer to a buffer where the content
+ *                        will be written to the flash
+ *  \param[in]  length    Number of bytes to write
+ *  \return Write status.
+ */
+int32_t flash_write(struct flash_descriptor *flash, uint32_t dst_addr, uint8_t *buffer, uint32_t length);
+
+/** \brief Appends a number of bytes to a page in the internal Flash
+ *
+ *  This functions never erases the flash before writing.
+ *
+ *  \param[in, out] flash Pointer to the HAL FLASH instance.
+ *  \param[in]  dst_addr  Destination bytes address to write to flash
+ *  \param[in]  buffer    Pointer to a buffer with data to write to flash
+ *  \param[in]  length    Number of bytes to append
+ *  \return Append status.
+ */
+int32_t flash_append(struct flash_descriptor *flash, uint32_t dst_addr, uint8_t *buffer, uint32_t length);
+
+/** \brief Reads a number of bytes to a page in the internal Flash
+ *
+ *  \param[in, out] flash Pointer to the HAL FLASH instance.
+ *  \param[in]  src_addr  Source bytes address to read from flash
+ *  \param[out] buffer    Pointer to a buffer where the content
+ *                        of the read pages will be stored
+ *  \param[in]  length    Number of bytes to read
+ *  \return Read status.
+ */
+int32_t flash_read(struct flash_descriptor *flash, uint32_t src_addr, uint8_t *buffer, uint32_t length);
+
+/** \brief Register a function as FLASH transfer completion callback
+ *
+ *  \param[in, out] flash Pointer to the HAL FLASH instance.
+ *  \param[in] type Callback type (\ref flash_cb_type).
+ *  \param[in] func Pointer to callback function.
+ *  \retval 0 Success
+ *  \retval -1 Error
+ */
+int32_t flash_register_callback(struct flash_descriptor *flash, const enum flash_cb_type type, flash_cb_t func);
+
+/** \brief Execute lock in the internal flash
+ *
+ *  \param[in, out] flash Pointer to the HAL FLASH instance.
+ *  \param[in]  dst_addr  Destination bytes address aligned with page
+ *                        start to be locked
+ *  \param[in]  page_nums Number of pages to be locked
+ *
+ *  \return Real locked numbers of pages.
+ */
+int32_t flash_lock(struct flash_descriptor *flash, const uint32_t dst_addr, const uint32_t page_nums);
+
+/** \brief Execute unlock in the internal flash
+ *
+ *  \param[in, out] flash Pointer to the HAL FLASH instance.
+ *  \param[in]  dst_addr  Destination bytes address aligned with page
+ *                        start to be unlocked
+ *  \param[in]  page_nums Number of pages to be unlocked
+ *
+ *  \return Real unlocked numbers of pages.
+ */
+int32_t flash_unlock(struct flash_descriptor *flash, const uint32_t dst_addr, const uint32_t page_nums);
+
+/** \brief Execute erase in the internal flash
+ *
+ *  \param[in, out] flash Pointer to the HAL FLASH instance.
+ *  \param[in]  dst_addr  Destination bytes address aligned with page
+ *                        start to be erased
+ *  \param[in]  page_nums Number of pages to be erased
+ *  \retval 0 Success
+ *  \retval -1 Error
+ */
+int32_t flash_erase(struct flash_descriptor *flash, const uint32_t dst_addr, const uint32_t page_nums);
+
+/**
+ * \brief Get the flash page size
+ *
+ * \param[in, out] flash Pointer to the HAL FLASH instance
+ *
+ * \return The flash page size
+ */
+uint32_t flash_get_page_size(struct flash_descriptor *flash);
+
+/**
+ * \brief Get the number of flash page
+ *
+ * \param[in, out] flash Pointer to the HAL FLASH instance.
+ *
+ * \return The flash total page numbers
+ */
+uint32_t flash_get_total_pages(struct flash_descriptor *flash);
+
+/** \brief Retrieve the current driver version
+ *
+ *  \return Current driver version.
+ */
+uint32_t flash_get_version(void);
+
+#ifdef __cplusplus
+}
+#endif
+/**@}*/
+#endif /* ifndef _HAL_FLASH_H_INCLUDED */
diff --git a/watch-library/hal/include/hal_rand_sync.h b/watch-library/hal/include/hal_rand_sync.h
new file mode 100755
index 00000000..9f8cc31e
--- /dev/null
+++ b/watch-library/hal/include/hal_rand_sync.h
@@ -0,0 +1,134 @@
+/**
+ * \file
+ *
+ * \brief Generic Random Number Generator (RAND) functionality declaration.
+ *
+ * Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#ifndef _HAL_RAND_SYNC_H_INCLUDED
+#define _HAL_RAND_SYNC_H_INCLUDED
+
+#include <hpl_rand_sync.h>
+
+#include <utils_assert.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \addtogroup doc_driver_hal_rand_sync
+ *
+ *@{
+ */
+
+/** Random Number Generator polling device. */
+struct rand_sync_desc {
+	struct _rand_sync_dev dev;
+};
+
+/**
+ *  \brief Initialize the Random Number Generator Driver
+ *  \param[out] desc Pointer to the device descriptor instance struct
+ *  \param[in, out] hw Pointer to the hardware for device instance
+ *  \return Initialization operation result status, ERR_NONE (0) for OK.
+ */
+int32_t rand_sync_init(struct rand_sync_desc *const desc, void *const hw);
+
+/**
+ *  \brief Deinitialize the Random Number Generator Driver
+ *  \param[out] desc Pointer to the device descriptor instance struct
+ */
+void rand_sync_deinit(struct rand_sync_desc *const desc);
+
+/**
+ *  \brief Enable the Random Number Generator Driver
+ *  \param[out] desc Pointer to the device descriptor instance struct
+ *  \return Enable operation result status, ERR_NONE (0) for OK.
+ */
+int32_t rand_sync_enable(struct rand_sync_desc *const desc);
+
+/**
+ *  \brief Disable the Random Number Generator Driver
+ *  \param[out] desc Pointer to the device descriptor instance struct
+ */
+void rand_sync_disable(struct rand_sync_desc *const desc);
+
+/**
+ *  \brief Set seed for the Random Number Generator Driver
+ *  \param[out] desc Pointer to the device descriptor instance struct
+ */
+int32_t rand_sync_set_seed(struct rand_sync_desc *const desc, const uint32_t seed);
+
+/**
+ *  \brief Read the 8-bit Random Number
+ *  \param[in] desc Pointer to the device descriptor instance struct
+ *  \return The random number generated
+ */
+uint8_t rand_sync_read8(const struct rand_sync_desc *const desc);
+
+/**
+ *  \brief Read the 32-bit Random Number
+ *  \param[in] desc Pointer to the device descriptor instance struct
+ *  \return The random number generated
+ */
+uint32_t rand_sync_read32(const struct rand_sync_desc *const desc);
+
+/**
+ *  \brief Read the 8-bit Random Number Sequence into a buffer
+ *  \param[in] desc Pointer to the device descriptor instance struct
+ *  \param[out] buf Pointer to the buffer to fill an array of generated numbers
+ *  \param[in] len Number of random numbers to read
+ */
+void rand_sync_read_buf8(const struct rand_sync_desc *const desc, uint8_t *buf, uint32_t len);
+
+/**
+ *  \brief Read the 32-bit Random Number Sequence into a buffer
+ *  \param[in] desc Pointer to the device descriptor instance struct
+ *  \param[out] buf Pointer to the buffer to fill an array of generated numbers
+ *  \param[in] len Number of random numbers to read
+ */
+void rand_sync_read_buf32(const struct rand_sync_desc *const desc, uint32_t *buf, uint32_t len);
+
+/**
+ * \brief Retrieve the current driver version
+ *
+ * \return Current driver version.
+ */
+uint32_t rand_sync_get_version(void);
+
+/* I/O read will be used to get random data. */
+
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _HAL_RAND_SYNC_H_INCLUDED */
diff --git a/watch-library/hal/include/hal_spi_m_sync.h b/watch-library/hal/include/hal_spi_m_sync.h
new file mode 100755
index 00000000..5d040558
--- /dev/null
+++ b/watch-library/hal/include/hal_spi_m_sync.h
@@ -0,0 +1,221 @@
+/**
+ * \file
+ *
+ * \brief SPI related functionality declaration.
+ *
+ * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#ifndef _HAL_SPI_M_SYNC_H_INCLUDED
+#define _HAL_SPI_M_SYNC_H_INCLUDED
+
+#include <hal_io.h>
+#include <hpl_spi_m_sync.h>
+
+/**
+ * \addtogroup doc_driver_hal_spi_master_sync
+ *
+ * @{
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** \brief SPI HAL driver struct for polling mode
+ *
+ */
+struct spi_m_sync_descriptor {
+	struct _spi_m_sync_hpl_interface *func;
+	/** SPI device instance */
+	struct _spi_sync_dev dev;
+	/** I/O read/write */
+	struct io_descriptor io;
+	/** Flags for HAL driver */
+	uint16_t flags;
+};
+
+/** \brief Set the SPI HAL instance function pointer for HPL APIs.
+ *
+ *  Set SPI HAL instance function pointer for HPL APIs.
+ *
+ *  \param[in] spi Pointer to the HAL SPI instance.
+ *  \param[in] func Pointer to the HPL api structure.
+ *
+ */
+void spi_m_sync_set_func_ptr(struct spi_m_sync_descriptor *spi, void *const func);
+
+/** \brief Initialize SPI HAL instance and hardware for polling mode
+ *
+ *  Initialize SPI HAL with polling mode.
+ *
+ *  \param[in] spi Pointer to the HAL SPI instance.
+ *  \param[in] hw Pointer to the hardware base.
+ *
+ *  \return Operation status.
+ *  \retval ERR_NONE Success.
+ *  \retval ERR_INVALID_DATA Error, initialized.
+ */
+int32_t spi_m_sync_init(struct spi_m_sync_descriptor *spi, void *const hw);
+
+/** \brief Deinitialize the SPI HAL instance and hardware
+ *
+ *  Abort transfer, disable and reset SPI, deinit software.
+ *
+ *  \param[in] spi Pointer to the HAL SPI instance.
+ *
+ *  \return Operation status.
+ *  \retval ERR_NONE Success.
+ *  \retval <0 Error code.
+ */
+void spi_m_sync_deinit(struct spi_m_sync_descriptor *spi);
+
+/** \brief Enable SPI
+ *
+ *  \param[in] spi Pointer to the HAL SPI instance.
+ *
+ *  \return Operation status.
+ *  \retval ERR_NONE Success.
+ *  \retval <0 Error code.
+ */
+void spi_m_sync_enable(struct spi_m_sync_descriptor *spi);
+
+/** \brief Disable SPI
+ *
+ *  \param[in] spi Pointer to the HAL SPI instance.
+ *
+ *  \return Operation status.
+ *  \retval ERR_NONE Success.
+ *  \retval <0 Error code.
+ */
+void spi_m_sync_disable(struct spi_m_sync_descriptor *spi);
+
+/** \brief Set SPI baudrate
+ *
+ *  Works if SPI is initialized as master, it sets the baudrate.
+ *
+ *  \param[in] spi Pointer to the HAL SPI instance.
+ *  \param[in] baud_val The target baudrate value
+ *                  (see "baudrate calculation" for calculating the value).
+ *
+ *  \return Operation status.
+ *  \retval ERR_NONE Success.
+ *  \retval ERR_BUSY Busy
+ *  \retval ERR_INVALID_ARG The baudrate is not supported.
+ */
+int32_t spi_m_sync_set_baudrate(struct spi_m_sync_descriptor *spi, const uint32_t baud_val);
+
+/** \brief Set SPI mode
+ *
+ *  Set the SPI transfer mode (\ref spi_transfer_mode),
+ *  which controls the clock polarity and clock phase:
+ *  - Mode 0: leading edge is rising edge, data sample on leading edge.
+ *  - Mode 1: leading edge is rising edge, data sample on trailing edge.
+ *  - Mode 2: leading edge is falling edge, data sample on leading edge.
+ *  - Mode 3: leading edge is falling edge, data sample on trailing edge.
+ *
+ *  \param[in] spi Pointer to the HAL SPI instance.
+ *  \param[in] mode The mode (0~3).
+ *
+ *  \return Operation status.
+ *  \retval ERR_NONE Success.
+ *  \retval ERR_BUSY Busy
+ *  \retval ERR_INVALID_ARG The mode is not supported.
+ */
+int32_t spi_m_sync_set_mode(struct spi_m_sync_descriptor *spi, const enum spi_transfer_mode mode);
+
+/** \brief Set SPI transfer character size in number of bits
+ *
+ *  The character size (\ref spi_char_size) influence the way the data is
+ *  sent/received.
+ *  For char size <= 8-bit, data is stored byte by byte.
+ *  For char size between 9-bit ~ 16-bit, data is stored in 2-byte length.
+ *  Note that the default and recommended char size is 8-bit since it's
+ *  supported by all system.
+ *
+ *  \param[in] spi Pointer to the HAL SPI instance.
+ *  \param[in] char_size The char size (~16, recommended 8).
+ *
+ *  \return Operation status.
+ *  \retval ERR_NONE Success.
+ *  \retval ERR_BUSY Busy
+ *  \retval ERR_INVALID_ARG The char size is not supported.
+ */
+int32_t spi_m_sync_set_char_size(struct spi_m_sync_descriptor *spi, const enum spi_char_size char_size);
+
+/** \brief Set SPI transfer data order
+ *
+ *  \param[in] spi Pointer to the HAL SPI instance.
+ *  \param[in] dord The data order: send LSB/MSB first.
+ *
+ *  \return Operation status.
+ *  \retval ERR_NONE Success.
+ *  \retval ERR_BUSY Busy
+ *  \retval ERR_INVALID_ARG The data order is not supported.
+ */
+int32_t spi_m_sync_set_data_order(struct spi_m_sync_descriptor *spi, const enum spi_data_order dord);
+
+/** \brief Perform the SPI data transfer (TX and RX) in polling way
+ *
+ *  Activate CS, do TX and RX and deactivate CS. It blocks.
+ *
+ *  \param[in, out] spi Pointer to the HAL SPI instance.
+ *  \param[in] xfer Pointer to the transfer information (\ref spi_xfer).
+ *
+ *  \retval size Success.
+ *  \retval >=0 Timeout, with number of characters transferred.
+ *  \retval ERR_BUSY SPI is busy
+ */
+int32_t spi_m_sync_transfer(struct spi_m_sync_descriptor *spi, const struct spi_xfer *xfer);
+
+/**
+ * \brief Return the I/O descriptor for this SPI instance
+ *
+ * This function will return an I/O instance for this SPI driver instance.
+ *
+ * \param[in] spi An SPI master descriptor, which is used to communicate through
+ *                SPI
+ * \param[in, out] io A pointer to an I/O descriptor pointer type
+ *
+ * \retval ERR_NONE
+ */
+int32_t spi_m_sync_get_io_descriptor(struct spi_m_sync_descriptor *const spi, struct io_descriptor **io);
+
+/** \brief Retrieve the current driver version
+ *
+ *  \return Current driver version.
+ */
+uint32_t spi_m_sync_get_version(void);
+
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ifndef _HAL_SPI_M_SYNC_H_INCLUDED */
diff --git a/watch-library/hal/include/hal_usart_sync.h b/watch-library/hal/include/hal_usart_sync.h
new file mode 100755
index 00000000..1ef22fc6
--- /dev/null
+++ b/watch-library/hal/include/hal_usart_sync.h
@@ -0,0 +1,247 @@
+/**
+ * \file
+ *
+ * \brief USART related functionality declaration.
+ *
+ * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#ifndef _HAL_SYNC_USART_H_INCLUDED
+#define _HAL_SYNC_USART_H_INCLUDED
+
+#include "hal_io.h"
+#include <hpl_usart_sync.h>
+
+/**
+ * \addtogroup doc_driver_hal_usart_sync
+ *
+ * @{
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief Synchronous USART descriptor
+ */
+struct usart_sync_descriptor {
+	struct io_descriptor      io;
+	struct _usart_sync_device device;
+};
+
+/**
+ * \brief Initialize USART interface
+ *
+ * This function initializes the given I/O descriptor to be used
+ * as USART interface descriptor.
+ * It checks if the given hardware is not initialized and
+ * if the given hardware is permitted to be initialized.
+ *
+ * \param[out] descr A USART descriptor which is used to communicate via USART
+ * \param[in] hw The pointer to hardware instance
+ * \param[in] func The pointer to as set of functions pointers
+ *
+ * \return Initialization status.
+ */
+int32_t usart_sync_init(struct usart_sync_descriptor *const descr, void *const hw, void *const func);
+
+/**
+ * \brief Deinitialize USART interface
+ *
+ * This function deinitializes the given I/O descriptor.
+ * It checks if the given hardware is initialized and
+ * if the given hardware is permitted to be deinitialized.
+ *
+ * \param[in] descr A USART descriptor which is used to communicate via USART
+ *
+ * \return De-initialization status.
+ */
+int32_t usart_sync_deinit(struct usart_sync_descriptor *const descr);
+
+/**
+ * \brief Enable USART interface
+ *
+ * Enables the USART interface
+ *
+ * \param[in] descr A USART descriptor which is used to communicate via USART
+ *
+ * \return Enabling status.
+ */
+int32_t usart_sync_enable(struct usart_sync_descriptor *const descr);
+
+/**
+ * \brief Disable USART interface
+ *
+ * Disables the USART interface
+ *
+ * \param[in] descr A USART descriptor which is used to communicate via USART
+ *
+ * \return Disabling status.
+ */
+int32_t usart_sync_disable(struct usart_sync_descriptor *const descr);
+
+/**
+ * \brief Retrieve I/O descriptor
+ *
+ * This function retrieves the I/O descriptor of the given USART descriptor.
+ *
+ * \param[in] descr A USART descriptor which is used to communicate via USART
+ * \param[out] io An I/O descriptor to retrieve
+ *
+ * \return The status of the I/O descriptor retrieving.
+ */
+int32_t usart_sync_get_io_descriptor(struct usart_sync_descriptor *const descr, struct io_descriptor **io);
+
+/**
+ * \brief Specify action for flow control pins
+ *
+ * This function sets the action (or state) for the flow control pins
+ * if the flow control is enabled.
+ * It sets the state of flow control pins only if the automatic support of
+ * the flow control is not supported by the hardware.
+ *
+ * \param[in] descr A USART descriptor which is used to communicate via USART
+ * \param[in] state A state to set the flow control pins
+ *
+ * \return The status of flow control action setup.
+ */
+int32_t usart_sync_set_flow_control(struct usart_sync_descriptor *const  descr,
+                                    const union usart_flow_control_state state);
+
+/**
+ * \brief Set USART baud rate
+ *
+ * \param[in] descr A USART descriptor which is used to communicate via USART
+ * \param[in] baud_rate A baud rate to set
+ *
+ * \return The status of baud rate setting.
+ */
+int32_t usart_sync_set_baud_rate(struct usart_sync_descriptor *const descr, const uint32_t baud_rate);
+
+/**
+ * \brief Set USART data order
+ *
+ * \param[in] descr A USART descriptor which is used to communicate via USART
+ * \param[in] data_order A data order to set
+ *
+ * \return The status of data order setting.
+ */
+int32_t usart_sync_set_data_order(struct usart_sync_descriptor *const descr, const enum usart_data_order data_order);
+
+/**
+ * \brief Set USART mode
+ *
+ * \param[in] descr A USART descriptor which is used to communicate via USART
+ * \param[in] mode A mode to set
+ *
+ * \return The status of mode setting.
+ */
+int32_t usart_sync_set_mode(struct usart_sync_descriptor *const descr, const enum usart_mode mode);
+
+/**
+ * \brief Set USART parity
+ *
+ * \param[in] descr A USART descriptor which is used to communicate via USART
+ * \param[in] parity A parity to set
+ *
+ * \return The status of parity setting.
+ */
+int32_t usart_sync_set_parity(struct usart_sync_descriptor *const descr, const enum usart_parity parity);
+
+/**
+ * \brief Set USART stop bits
+ *
+ * \param[in] descr A USART descriptor which is used to communicate via USART
+ * \param[in] stop_bits Stop bits to set
+ *
+ * \return The status of stop bits setting.
+ */
+int32_t usart_sync_set_stopbits(struct usart_sync_descriptor *const descr, const enum usart_stop_bits stop_bits);
+
+/**
+ * \brief Set USART character size
+ *
+ * \param[in] descr A USART descriptor which is used to communicate via USART
+ * \param[in] size A character size to set
+ *
+ * \return The status of character size setting.
+ */
+int32_t usart_sync_set_character_size(struct usart_sync_descriptor *const descr, const enum usart_character_size size);
+
+/**
+ * \brief Retrieve the state of flow control pins
+ *
+ * This function retrieves the of flow control pins
+ * if the flow control is enabled.
+ * Function can return USART_FLOW_CONTROL_STATE_UNAVAILABLE in case
+ * if the flow control is done by the hardware
+ * and the pins state cannot be read out.
+ *
+ * \param[in] descr A USART descriptor which is used to communicate via USART
+ * \param[out] state The state of flow control pins
+ *
+ * \return The status of flow control state reading.
+ */
+int32_t usart_sync_flow_control_status(const struct usart_sync_descriptor *const descr,
+                                       union usart_flow_control_state *const     state);
+
+/**
+ * \brief Check if the USART transmitter is empty
+ *
+ * \param[in] descr A USART descriptor which is used to communicate via USART
+ *
+ * \return The status of USART TX empty checking.
+ * \retval 0 The USART transmitter is not empty
+ * \retval 1 The USART transmitter is empty
+ */
+int32_t usart_sync_is_tx_empty(const struct usart_sync_descriptor *const descr);
+
+/**
+ * \brief Check if the USART receiver is not empty
+ *
+ * \param[in] descr A USART descriptor which is used to communicate via USART
+ *
+ * \return The status of USART RX empty checking.
+ * \retval 1 The USART receiver is not empty
+ * \retval 0 The USART receiver is empty
+ */
+int32_t usart_sync_is_rx_not_empty(const struct usart_sync_descriptor *const descr);
+
+/**
+ * \brief Retrieve the current driver version
+ *
+ * \return Current driver version.
+ */
+uint32_t usart_sync_get_version(void);
+
+#ifdef __cplusplus
+}
+#endif
+/**@}*/
+#endif /* _HAL_SYNC_USART_H_INCLUDED */
diff --git a/watch-library/hal/include/hpl_flash.h b/watch-library/hal/include/hpl_flash.h
new file mode 100755
index 00000000..3a42c448
--- /dev/null
+++ b/watch-library/hal/include/hpl_flash.h
@@ -0,0 +1,265 @@
+/**
+ * \file
+ *
+ * \brief FLASH related functionality declaration.
+ *
+ * Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+#ifndef _HPL_FLASH_H_INCLUDED
+#define _HPL_FLASH_H_INCLUDED
+
+/**
+ * \addtogroup hpl__flash__group FLASH HPL APIs
+ *
+ */
+
+/**@{*/
+
+#include <compiler.h>
+#include "hpl_irq.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief FLASH device structure
+ *
+ * The FLASH device structure forward declaration.
+ */
+struct _flash_device;
+
+/** The callback types */
+enum _flash_cb_type { FLASH_DEVICE_CB_READY, FLASH_DEVICE_CB_ERROR, FLASH_DEVICE_CB_N };
+
+/**
+ * \brief FLASH interrupt handlers structure
+ */
+struct _flash_callback {
+	/** Ready to accept new command handler */
+	void (*ready_cb)(struct _flash_device *device);
+	/** Error handler */
+	void (*error_cb)(struct _flash_device *device);
+};
+
+/**
+ * \brief FLASH descriptor device structure.
+ */
+struct _flash_device {
+	struct _flash_callback flash_cb; /*!< Interrupt handers  */
+	struct _irq_descriptor irq;      /*!< Interrupt descriptor */
+	void *                 hw;       /*!< Hardware module instance handler */
+};
+
+/**
+ * \brief Initialize FLASH.
+ *
+ * This function does low level FLASH configuration.
+ *
+ * \param[in] device The pointer to FLASH device instance
+ * \param[in] hw The pointer to hardware instance
+ *
+ * \return Initialize status.
+ */
+int32_t _flash_init(struct _flash_device *const device, void *const hw);
+
+/**
+ * \brief Deinitialize FLASH.
+ *
+ * \param[in] device The pointer to FLASH device instance
+ */
+void _flash_deinit(struct _flash_device *const device);
+
+/**
+ * \brief Reads a number of bytes in the internal Flash.
+ *
+ * \param[in] device         The pointer to FLASH device instance
+ * \param[in]  src_addr      Source bytes address to read from flash
+ * \param[out] buffer        Pointer to a buffer where the content
+ *                           of the read page will be stored
+ * \param[in]  length        Number of bytes to read
+ */
+void _flash_read(struct _flash_device *const device, const uint32_t src_addr, uint8_t *buffer, uint32_t length);
+
+/**
+ * \brief Writes a number of bytes in the internal Flash.
+ *
+ * \param[in] device         The pointer to FLASH device instance
+ * \param[in]  dst_addr      Destination bytes address to write into flash
+ * \param[in]  buffer        Pointer to buffer where the data to
+ *                           write is stored
+ * \param[in]  length        Number of bytes to write
+ */
+void _flash_write(struct _flash_device *const device, const uint32_t dst_addr, uint8_t *buffer, uint32_t length);
+
+/**
+ * \brief Appends a number of bytes in the internal Flash.
+ *
+ * \param[in] device         The pointer to FLASH device instance
+ * \param[in]  dst_addr      Destination bytes address to write into flash
+ * \param[in]  buffer        Pointer to buffer with data to write to flash
+ * \param[in]  length        Number of bytes to write
+ */
+void _flash_append(struct _flash_device *const device, const uint32_t dst_addr, uint8_t *buffer, uint32_t length);
+
+/** \brief Execute lock in the internal flash
+ *  \param[in] device         The pointer to FLASH device instance
+ *  \param[in]  dst_addr      Destination bytes address aligned with page
+ *                            start to be locked
+ *  \param[in]  page_nums     Number of pages to be locked
+ *
+ *  \return Real locked numbers of pages.
+ */
+int32_t _flash_lock(struct _flash_device *const device, const uint32_t dst_addr, uint32_t page_nums);
+
+/** \brief Execute unlock in the internal flash
+ *  \param[in] device         The pointer to FLASH device instance
+ *  \param[in]  dst_addr      Destination bytes address aligned with page
+ *                            start to be unlocked
+ *  \param[in]  page_nums     Number of pages to be unlocked
+ *
+ *  \return Real unlocked numbers of pages.
+ */
+int32_t _flash_unlock(struct _flash_device *const device, const uint32_t dst_addr, uint32_t page_nums);
+
+/** \brief check whether the region which is pointed by address
+ *         is locked
+ *  \param[in] device         The pointer to FLASH device instance
+ *  \param[in]  dst_addr      Destination bytes address to check
+ *
+ *  \return The lock status of assigned address.
+ */
+bool _flash_is_locked(struct _flash_device *const device, const uint32_t dst_addr);
+
+/** \brief Execute erase in the internal flash
+ *  \param[in] device         The pointer to FLASH device instance
+ *  \param[in]  dst_addr      Destination bytes address aligned with page
+ *                            start to be erased
+ *  \param[in]  page_nums     Number of pages to be erased
+ */
+void _flash_erase(struct _flash_device *const device, const uint32_t dst_addr, uint32_t page_nums);
+
+/**
+ * \brief Get the flash page size.
+ *
+ * \param[in] device         The pointer to FLASH device instance
+ *
+ * \return The flash page size
+ */
+uint32_t _flash_get_page_size(struct _flash_device *const device);
+
+/**
+ * \brief Get the numbers of flash page.
+ *
+ * \param[in] device         The pointer to FLASH device instance
+ *
+ * \return The flash total page numbers
+ */
+uint32_t _flash_get_total_pages(struct _flash_device *const device);
+
+/**
+ * \brief Get the number of wait states for read and write operations.
+ *
+ * \param[in] device         The pointer to FLASH device instance
+ *
+ * \return The number of wait states for read and write operations
+ */
+uint8_t _flash_get_wait_state(struct _flash_device *const device);
+
+/**
+ * \brief Set the number of wait states for read and write operations.
+ *
+ * \param[in] device         The pointer to FLASH device instance
+ * \param[in] state The number of wait states
+ *
+ */
+void _flash_set_wait_state(struct _flash_device *const device, uint8_t state);
+
+/**
+ * \brief Enable/disable Flash interrupt
+ *
+ * param[in] device The pointer to Flash device instance
+ * param[in] type The type of interrupt to disable/enable if applicable
+ * param[in] state Enable or disable
+ */
+void _flash_set_irq_state(struct _flash_device *const device, const enum _flash_cb_type type, const bool state);
+
+/*
+ * Below RWW flash APIs are only available for device which has RWWEE
+ * flash array, such as SAM C20/C21/D21/L21/L22/R30/DA1/HA1 etc.
+ */
+/**
+ * \brief Get the RWWEE flash page size.
+ *
+ * \param[in] device         The pointer to FLASH device instance
+ *
+ * \return The flash page size
+ */
+uint32_t _rww_flash_get_page_size(struct _flash_device *const device);
+
+/**
+ * \brief Get the total page numbers of RWWEE flash.
+ *
+ * \param[in] device         The pointer to FLASH device instance
+ *
+ * \return The flash total page numbers
+ */
+uint32_t _rww_flash_get_total_pages(struct _flash_device *const device);
+
+/**
+ * \brief Reads a number of bytes in the internal RWWEE Flash.
+ *
+ * \param[in] device         The pointer to FLASH device instance
+ * \param[in]  src_addr      Source bytes address to read from flash
+ * \param[out] buffer        Pointer to a buffer where the content
+ *                           of the read page will be stored
+ * \param[in]  length        Number of bytes to read
+ *
+ * \return Read status, ERR_NONE for successful read.
+ */
+int32_t _rww_flash_read(struct _flash_device *const device, const uint32_t src_addr, uint8_t *buffer, uint32_t length);
+
+/**
+ * \brief Writes a number of bytes in the internal RWWEE Flash.
+ *
+ * \param[in] device         The pointer to FLASH device instance
+ * \param[in]  dst_addr      Destination bytes address to write into flash
+ * \param[in]  buffer        Pointer to buffer where the data to
+ *                           write is stored
+ * \param[in]  length        Number of bytes to write
+ *
+ * \return Write status, ERR_NONE for successful write.
+ */
+int32_t _rww_flash_write(struct _flash_device *const device, const uint32_t dst_addr, uint8_t *buffer, uint32_t length);
+#ifdef __cplusplus
+}
+#endif
+
+/**@}*/
+
+#endif /* _HPL_FLASH_H_INCLUDED */
diff --git a/watch-library/hal/include/hpl_rand_sync.h b/watch-library/hal/include/hpl_rand_sync.h
new file mode 100755
index 00000000..5fdf1340
--- /dev/null
+++ b/watch-library/hal/include/hpl_rand_sync.h
@@ -0,0 +1,99 @@
+/**
+ * \file
+ *
+ * \brief Random Number Generator (RAND) related functionality declaration.
+ *
+ * Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#ifndef _HPL_RAND_SYNC_H_INCLUDED
+#define _HPL_RAND_SYNC_H_INCLUDED
+
+#include <compiler.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Random Number Generator polling device. */
+struct _rand_sync_dev {
+	/** Pointer to private data or hardware base */
+	void *prvt;
+	/** Number of bits generated for each read operation */
+	uint8_t n_bits;
+};
+
+/**
+ *  \brief Initialize the Random Number Generator Driver
+ *  \param[out] dev Pointer to the device instance struct
+ *  \param[in, out] hw Pointer to the hardware for device instance
+ *  \return Initialization operation result status, 0 for OK.
+ */
+int32_t _rand_sync_init(struct _rand_sync_dev *const dev, void *const hw);
+
+/**
+ *  \brief Deinitialize the Random Number Generator Driver
+ *  \param[in, out] dev Pointer to the device instance struct
+ */
+void _rand_sync_deinit(struct _rand_sync_dev *const dev);
+
+/**
+ *  \brief Enable the Random Number Generator Driver
+ *  \param[out] dev Pointer to the device instance struct
+ *  \return Enable operation result status, 0 for OK.
+ */
+int32_t _rand_sync_enable(struct _rand_sync_dev *const dev);
+
+/**
+ *  \brief Disable the Random Number Generator Driver
+ *  \param[out] dev Pointer to the device instance struct
+ */
+void _rand_sync_disable(struct _rand_sync_dev *const dev);
+
+/**
+ *  \brief Set seed for the Random Number Generator Driver
+ *  \param[out] dev Pointer to the device instance struct
+ *  \param[in] seed The seed to set
+ *  \return Operation result
+ *  \retval ERR_NONE Operation complete success
+ *  \retval ERR_UNSUPPORTED_OP Seed not supported
+ */
+int32_t _rand_sync_set_seed(struct _rand_sync_dev *const dev, const uint32_t seed);
+
+/**
+ *  \brief Polling random number until it's read back
+ *  \param[in] dev Pointer to the device instance struct
+ *  \return The random number value
+ */
+uint32_t _rand_sync_read_one(const struct _rand_sync_dev *const dev);
+
+#ifdef __cplusplus
+}
+#endif
+/**@}*/
+#endif /* _HPL_RAND_SYNC_H_INCLUDED */
diff --git a/watch-library/hal/include/hpl_spi_dma.h b/watch-library/hal/include/hpl_spi_dma.h
new file mode 100755
index 00000000..04a30158
--- /dev/null
+++ b/watch-library/hal/include/hpl_spi_dma.h
@@ -0,0 +1,88 @@
+/**
+ * \file
+ *
+ * \brief Common SPI DMA related functionality declaration.
+ *
+ * Copyright (c) 2016-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#ifndef _HPL_SPI_DMA_H_INCLUDED
+#define _HPL_SPI_DMA_H_INCLUDED
+
+#include <hpl_irq.h>
+#include <hpl_dma.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** The callback types */
+enum _spi_dma_dev_cb_type {
+	/** Callback type for DMA transmit. */
+	SPI_DEV_CB_DMA_TX,
+	/** Callback type for DMA receive. */
+	SPI_DEV_CB_DMA_RX,
+	/** Callback type for DMA error. */
+	SPI_DEV_CB_DMA_ERROR,
+	/** Number of callbacks. */
+	SPI_DEV_CB_DMA_N
+};
+
+struct _spi_dma_dev;
+
+/**
+ *  \brief The prototype for callback on SPI DMA.
+ */
+typedef void (*_spi_dma_cb_t)(struct _dma_resource *resource);
+
+/**
+ *  \brief The callbacks offered by SPI driver
+ */
+struct _spi_dma_dev_callbacks {
+	_spi_dma_cb_t tx;
+	_spi_dma_cb_t rx;
+	_spi_dma_cb_t error;
+};
+
+/** SPI driver to support DMA HAL */
+struct _spi_dma_dev {
+	/** Pointer to the hardware base or private data for special device. */
+	void *prvt;
+	/** Pointer to callback functions */
+	struct _spi_dma_dev_callbacks callbacks;
+	/** IRQ instance for SPI device. */
+	struct _irq_descriptor irq;
+	/** DMA resource */
+	struct _dma_resource *resource;
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ifndef _HPL_SPI_DMA_H_INCLUDED */
diff --git a/watch-library/hal/include/hpl_user_area.h b/watch-library/hal/include/hpl_user_area.h
new file mode 100755
index 00000000..1f14098d
--- /dev/null
+++ b/watch-library/hal/include/hpl_user_area.h
@@ -0,0 +1,123 @@
+/**
+ * \file
+ *
+ * \brief Special user data area access
+ *
+ * Copyright (c) 2016-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#ifndef _HPL_USER_DATA_H_INCLUDED
+#define _HPL_USER_DATA_H_INCLUDED
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief Read data from user data area
+ *
+ * The user data area could be the area that stores user data that is not erased
+ * with the flash contents, e.g.,
+ * - NVM Software Calibration Area of SAM D/L/C family
+ * - User Signature of SAM E/S/V 70
+ *
+ * \param[in]  base   The base address of the user area
+ * \param[in]  offset The byte offset of the data to be read inside the area
+ * \param[out] buf    Pointer to buffer to place the read data
+ * \param[in]  size   Size of data in number of bytes
+ *
+ * \return Operation status or bytes read.
+ * \retval ERR_NONE Data read successfully
+ * \retval ERR_UNSUPPORTED_OP base address not in any supported user area
+ * \retval ERR_BAD_ADDRESS offset not in right area
+ * \retval ERR_INVALID_ARG offset and size exceeds the right area
+ */
+int32_t _user_area_read(const void *base, const uint32_t offset, uint8_t *buf, const uint32_t size);
+
+/**
+ * \brief Read no more than 32 bits data from user data area
+ *
+ * When reading bits, the bitfield can cross 32-bis boundaries.
+ *
+ * \param[in] base       The base address of the user area
+ * \param[in] bit_offset Offset in number of bits
+ * \param[in] n_bits     Number of bits to read
+ * \return data read, assert if anything wrong (address not in user area
+ *         offset, size error, etc.).
+ */
+uint32_t _user_area_read_bits(const void *base, const uint32_t bit_offset, const uint8_t n_bits);
+
+/**
+ * \brief Write data to user data area
+ *
+ * The user data area could be the area that stores user data that is not erased
+ * with the flash contents, e.g.,
+ * - NVM Software Calibration Area of SAM D/L/C family
+ * - User Signature of SAM E/S/V 70
+ *
+ * When assigned offset and size exceeds the data area, error is reported.
+ *
+ * \param[out] base  The base address of the user area
+ * \param[in]  offset The offset of the data to be written inside the area
+ * \param[in]  buf    Pointer to buffer to place the written data
+ * \param[in]  size   Size of data in number of bytes
+ *
+ * \return Operation status or bytes writting.
+ * \retval ERR_NONE Data written successfully
+ * \retval ERR_UNSUPPORTED_OP base address not in any supported user area
+ * \retval ERR_DENIED Security bit is set
+ * \retval ERR_BAD_ADDRESS offset not in right area
+ * \retval ERR_INVALID_ARG offset and size exceeds the right area
+ */
+int32_t _user_area_write(void *base, const uint32_t offset, const uint8_t *buf, const uint32_t size);
+
+/**
+ * \brief Write no more than 32 bits data to user data area
+ *
+ * When writting bits, the bitfield can cross 32-bis boundaries.
+ *
+ * \param[out] base       The base address of the user area
+ * \param[in]  bit_offset Offset in number of bits
+ * \param[in]  bits       The data content
+ * \param[in]  n_bits     Number of bits to write
+ * \return Operation result
+ * \retval ERR_NONE Data written successfully
+ * \retval ERR_UNSUPPORTED_OP base address not in any supported user area
+ * \retval ERR_DENIED Security bit is set
+ * \retval ERR_BAD_ADDRESS offset not in right area
+ * \retval ERR_INVALID_ARG offset and size exceeds the right area
+ */
+int32_t _user_area_write_bits(void *base, const uint32_t bit_offset, const uint32_t bits, const uint8_t n_bits);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _HPL_USER_DATA_H_INCLUDED */
diff --git a/watch-library/hal/src/hal_flash.c b/watch-library/hal/src/hal_flash.c
new file mode 100755
index 00000000..b1a58b71
--- /dev/null
+++ b/watch-library/hal/src/hal_flash.c
@@ -0,0 +1,314 @@
+/**
+ * \file
+ *
+ * \brief Flash functionality implementation.
+ *
+ * Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include "hal_flash.h"
+#include <utils_assert.h>
+#include <utils.h>
+#include <hal_atomic.h>
+
+/**
+ * \brief Driver version
+ */
+#define DRIVER_VERSION 0x00000001u
+
+static void flash_ready(struct _flash_device *device);
+static void flash_error(struct _flash_device *device);
+
+static int32_t flash_is_address_aligned(struct flash_descriptor *flash, const uint32_t flash_addr);
+
+/**
+ * \brief Initialize the FLASH HAL instance and hardware for callback mode.
+ */
+int32_t flash_init(struct flash_descriptor *flash, void *const hw)
+{
+	int32_t rc;
+
+	ASSERT(flash && hw);
+
+	rc = _flash_init(&flash->dev, hw);
+	if (rc) {
+		return rc;
+	}
+
+	flash->dev.flash_cb.ready_cb = flash_ready;
+	flash->dev.flash_cb.error_cb = flash_error;
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief  Deinitialize the FLASH HAL instance.
+ */
+int32_t flash_deinit(struct flash_descriptor *flash)
+{
+	ASSERT(flash);
+
+	_flash_deinit(&flash->dev);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Reads a number of bytes to a page in the internal Flash
+ */
+int32_t flash_read(struct flash_descriptor *flash, uint32_t src_addr, uint8_t *buffer, uint32_t length)
+{
+	ASSERT(flash && buffer && length);
+
+	uint32_t page_size   = _flash_get_page_size(&flash->dev);
+	uint32_t total_pages = _flash_get_total_pages(&flash->dev);
+
+	/* Check if the address is valid */
+	if ((src_addr > page_size * total_pages) || (src_addr + length > page_size * total_pages)) {
+		return ERR_BAD_ADDRESS;
+	}
+
+	_flash_read(&flash->dev, src_addr, buffer, length);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Updates several bytes to the internal Flash
+ */
+int32_t flash_write(struct flash_descriptor *flash, uint32_t dst_addr, uint8_t *buffer, uint32_t length)
+{
+	ASSERT(flash && buffer && length);
+
+	uint32_t page_size   = _flash_get_page_size(&flash->dev);
+	uint32_t total_pages = _flash_get_total_pages(&flash->dev);
+
+	/* Check if the address is valid */
+	if ((dst_addr > page_size * total_pages) || (dst_addr + length > page_size * total_pages)) {
+		return ERR_BAD_ADDRESS;
+	}
+
+	if (_flash_is_locked(&flash->dev, dst_addr)) {
+		return ERR_DENIED;
+	}
+
+	_flash_write(&flash->dev, dst_addr, buffer, length);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Appends a number of bytes to a page in the internal Flash
+ */
+int32_t flash_append(struct flash_descriptor *flash, uint32_t dst_addr, uint8_t *buffer, uint32_t length)
+{
+	ASSERT(flash && buffer && length);
+
+	uint32_t page_size   = _flash_get_page_size(&flash->dev);
+	uint32_t total_pages = _flash_get_total_pages(&flash->dev);
+
+	/* Check if the address is valid */
+	if ((dst_addr > page_size * total_pages) || (dst_addr + length > page_size * total_pages)) {
+		return ERR_BAD_ADDRESS;
+	}
+
+	if (_flash_is_locked(&flash->dev, dst_addr)) {
+		return ERR_DENIED;
+	}
+
+	_flash_append(&flash->dev, dst_addr, buffer, length);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Execute erase in the internal flash
+ */
+int32_t flash_erase(struct flash_descriptor *flash, const uint32_t dst_addr, const uint32_t page_nums)
+{
+	ASSERT(flash && page_nums);
+	uint32_t page_size   = _flash_get_page_size(&flash->dev);
+	uint32_t total_pages = _flash_get_total_pages(&flash->dev);
+	int32_t  rc;
+
+	rc = flash_is_address_aligned(flash, dst_addr);
+	if (rc) {
+		return rc;
+	}
+
+	if ((page_nums > total_pages) || (dst_addr / page_size + page_nums > total_pages)) {
+		return ERR_INVALID_ARG;
+	}
+
+	_flash_erase(&flash->dev, dst_addr, page_nums);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Register a function as FLASH transfer completion callback
+ */
+int32_t flash_register_callback(struct flash_descriptor *flash, const enum flash_cb_type type, flash_cb_t func)
+{
+	ASSERT(flash);
+
+	switch (type) {
+	case FLASH_CB_READY:
+		flash->callbacks.cb_ready = func;
+		break;
+
+	case FLASH_CB_ERROR:
+		flash->callbacks.cb_error = func;
+		break;
+
+	default:
+		return ERR_INVALID_ARG;
+	}
+
+	_flash_set_irq_state(&flash->dev, (enum _flash_cb_type)type, NULL != func);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Execute lock in the internal flash
+ */
+int32_t flash_lock(struct flash_descriptor *flash, const uint32_t dst_addr, const uint32_t page_nums)
+{
+	ASSERT(flash && page_nums);
+	uint32_t page_size   = _flash_get_page_size(&flash->dev);
+	uint32_t total_pages = _flash_get_total_pages(&flash->dev);
+	int32_t  rc;
+
+	rc = flash_is_address_aligned(flash, dst_addr);
+	if (rc) {
+		return rc;
+	}
+
+	if ((page_nums > total_pages) || (dst_addr / page_size + page_nums > total_pages)) {
+		return ERR_INVALID_ARG;
+	}
+
+	return _flash_lock(&flash->dev, dst_addr, page_nums);
+}
+
+/**
+ * \brief Execute unlock in the internal flash
+ */
+int32_t flash_unlock(struct flash_descriptor *flash, const uint32_t dst_addr, const uint32_t page_nums)
+{
+	ASSERT(flash && page_nums);
+	uint32_t page_size   = _flash_get_page_size(&flash->dev);
+	uint32_t total_pages = _flash_get_total_pages(&flash->dev);
+	int32_t  rc;
+
+	rc = flash_is_address_aligned(flash, dst_addr);
+	if (rc) {
+		return rc;
+	}
+
+	if ((page_nums > total_pages) || (dst_addr / page_size + page_nums > total_pages)) {
+		return ERR_INVALID_ARG;
+	}
+
+	return _flash_unlock(&flash->dev, dst_addr, page_nums);
+}
+
+/**
+ * \brief Get the flash page size.
+ */
+uint32_t flash_get_page_size(struct flash_descriptor *flash)
+{
+	ASSERT(flash);
+	return _flash_get_page_size(&flash->dev);
+}
+
+/**
+ * \brief Get the numbers of flash page.
+ */
+uint32_t flash_get_total_pages(struct flash_descriptor *flash)
+{
+	ASSERT(flash);
+	return _flash_get_total_pages(&flash->dev);
+}
+
+/**
+ * \brief Retrieve the current driver version
+ */
+uint32_t flash_get_version(void)
+{
+	return DRIVER_VERSION;
+}
+
+/**
+ * \internal check the address whether it is aligned
+ * \param[in, out] flash        Pointer to the HAL FLASH instance.
+ * \param[in]  flash_addr       address to be check in flash
+ *
+ * \return whether it is valid
+ *  \retval 0 Valid.
+ *  \retval -1 Error, invalid.
+ */
+static int32_t flash_is_address_aligned(struct flash_descriptor *flash, const uint32_t flash_addr)
+{
+	ASSERT(flash);
+
+	uint32_t page_size = _flash_get_page_size(&flash->dev);
+
+	/* Check if the read address not aligned to the start of a page */
+	if (flash_addr & (page_size - 1)) {
+		return ERR_BAD_ADDRESS;
+	}
+	return ERR_NONE;
+}
+
+/**
+ * \internal Ready for a new flash command
+ *
+ * \param[in] device The pointer to flash device structure
+ */
+static void flash_ready(struct _flash_device *device)
+{
+	struct flash_descriptor *const descr = CONTAINER_OF(device, struct flash_descriptor, dev);
+	if (descr->callbacks.cb_ready) {
+		descr->callbacks.cb_ready(descr);
+	}
+}
+
+/**
+ * \internal Error occurs in flash command
+ *
+ * \param[in] device The pointer to flash device structure
+ */
+static void flash_error(struct _flash_device *device)
+{
+	struct flash_descriptor *const descr = CONTAINER_OF(device, struct flash_descriptor, dev);
+	if (descr->callbacks.cb_error) {
+		descr->callbacks.cb_error(descr);
+	}
+}
diff --git a/watch-library/hal/src/hal_rand_sync.c b/watch-library/hal/src/hal_rand_sync.c
new file mode 100755
index 00000000..8b29ed1b
--- /dev/null
+++ b/watch-library/hal/src/hal_rand_sync.c
@@ -0,0 +1,122 @@
+/**
+ * \file
+ *
+ * \brief Generic Random Number Generator (RNG) functionality declaration.
+ *
+ * Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include <utils.h>
+#include "hal_rand_sync.h"
+
+#define HAL_RNG_SYNC_VERSION 0x00000001u
+
+int32_t rand_sync_init(struct rand_sync_desc *const desc, void *const hw)
+{
+	ASSERT(desc);
+
+	return _rand_sync_init(&desc->dev, hw);
+}
+
+void rand_sync_deinit(struct rand_sync_desc *const desc)
+{
+	ASSERT(desc);
+	_rand_sync_deinit(&desc->dev);
+}
+
+int32_t rand_sync_enable(struct rand_sync_desc *const desc)
+{
+	ASSERT(desc);
+	return _rand_sync_enable(&desc->dev);
+}
+
+void rand_sync_disable(struct rand_sync_desc *const desc)
+{
+	ASSERT(desc);
+	_rand_sync_disable(&desc->dev);
+}
+
+int32_t rand_sync_set_seed(struct rand_sync_desc *const desc, const uint32_t seed)
+{
+	ASSERT(desc);
+	return _rand_sync_set_seed(&desc->dev, seed);
+}
+
+/**
+ * \brief Read data bits
+ */
+static uint32_t _rand_sync_read_data(const struct _rand_sync_dev *dev, const uint8_t n_bits)
+{
+	uint8_t r_bits = (dev->n_bits < 1) ? 32 : dev->n_bits;
+	if (r_bits < n_bits) {
+		uint8_t  i;
+		uint32_t d = 0;
+		/* Join read bits */
+		for (i = 0; i < n_bits; i += r_bits) {
+			d |= (uint32_t)(_rand_sync_read_one(dev) << i);
+		}
+		return d;
+	} else {
+		return _rand_sync_read_one(dev);
+	}
+}
+
+uint8_t rand_sync_read8(const struct rand_sync_desc *const desc)
+{
+	ASSERT(desc);
+	return (uint8_t)_rand_sync_read_data(&desc->dev, 8);
+}
+
+uint32_t rand_sync_read32(const struct rand_sync_desc *const desc)
+{
+	ASSERT(desc);
+	return (uint32_t)_rand_sync_read_data(&desc->dev, 32);
+}
+
+void rand_sync_read_buf8(const struct rand_sync_desc *const desc, uint8_t *buf, uint32_t len)
+{
+	uint32_t i;
+	ASSERT(desc && (buf && len));
+	for (i = 0; i < len; i++) {
+		buf[i] = (uint8_t)_rand_sync_read_data(&desc->dev, 8);
+	}
+}
+
+void rand_sync_read_buf32(const struct rand_sync_desc *const desc, uint32_t *buf, uint32_t len)
+{
+	uint32_t i;
+	ASSERT(desc && (buf && len));
+	for (i = 0; i < len; i++) {
+		buf[i] = (uint32_t)_rand_sync_read_data(&desc->dev, 32);
+	}
+}
+
+uint32_t rand_sync_get_version(void)
+{
+	return HAL_RNG_SYNC_VERSION;
+}
diff --git a/watch-library/hal/src/hal_spi_m_sync.c b/watch-library/hal/src/hal_spi_m_sync.c
new file mode 100755
index 00000000..1a64296a
--- /dev/null
+++ b/watch-library/hal/src/hal_spi_m_sync.c
@@ -0,0 +1,201 @@
+/**
+ * \file
+ *
+ * \brief I/O SPI related functionality implementation.
+ *
+ * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include "hal_spi_m_sync.h"
+#include <utils_assert.h>
+#include <utils.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief Driver version
+ */
+#define SPI_M_SYNC_DRIVER_VERSION 0x00000001u
+
+#define SPI_DEACTIVATE_NEXT 0x8000
+
+static int32_t _spi_m_sync_io_write(struct io_descriptor *const io, const uint8_t *const buf, const uint16_t length);
+static int32_t _spi_m_sync_io_read(struct io_descriptor *const io, uint8_t *const buf, const uint16_t length);
+
+/**
+ *  \brief Initialize the SPI HAL instance function pointer for HPL APIs.
+ */
+void spi_m_sync_set_func_ptr(struct spi_m_sync_descriptor *spi, void *const func)
+{
+	ASSERT(spi);
+	spi->func = (struct _spi_m_sync_hpl_interface *)func;
+}
+
+int32_t spi_m_sync_init(struct spi_m_sync_descriptor *spi, void *const hw)
+{
+	int32_t rc = 0;
+	ASSERT(spi && hw);
+	spi->dev.prvt = (void *)hw;
+	rc            = _spi_m_sync_init(&spi->dev, hw);
+
+	if (rc < 0) {
+		return rc;
+	}
+
+	spi->flags    = SPI_DEACTIVATE_NEXT;
+	spi->io.read  = _spi_m_sync_io_read;
+	spi->io.write = _spi_m_sync_io_write;
+
+	return ERR_NONE;
+}
+
+void spi_m_sync_deinit(struct spi_m_sync_descriptor *spi)
+{
+	ASSERT(spi);
+	_spi_m_sync_deinit(&spi->dev);
+}
+
+void spi_m_sync_enable(struct spi_m_sync_descriptor *spi)
+{
+	ASSERT(spi);
+	_spi_m_sync_enable(&spi->dev);
+}
+
+void spi_m_sync_disable(struct spi_m_sync_descriptor *spi)
+{
+	ASSERT(spi);
+	_spi_m_sync_disable(&spi->dev);
+}
+
+int32_t spi_m_sync_set_baudrate(struct spi_m_sync_descriptor *spi, const uint32_t baud_val)
+{
+	ASSERT(spi);
+	return _spi_m_sync_set_baudrate(&spi->dev, baud_val);
+}
+
+int32_t spi_m_sync_set_mode(struct spi_m_sync_descriptor *spi, const enum spi_transfer_mode mode)
+{
+	ASSERT(spi);
+	return _spi_m_sync_set_mode(&spi->dev, mode);
+}
+
+int32_t spi_m_sync_set_char_size(struct spi_m_sync_descriptor *spi, const enum spi_char_size char_size)
+{
+	ASSERT(spi);
+	return _spi_m_sync_set_char_size(&spi->dev, char_size);
+}
+
+int32_t spi_m_sync_set_data_order(struct spi_m_sync_descriptor *spi, const enum spi_data_order dord)
+{
+	ASSERT(spi);
+	return _spi_m_sync_set_data_order(&spi->dev, dord);
+}
+
+/** \brief Do SPI read in polling way
+ *  For SPI master, activate CS, do send 0xFFs and read data, deactivate CS.
+ *
+ *  It blocks until all data read or error.
+ *
+ *  \param[in, out] spi Pointer to the HAL SPI instance.
+ *  \param[out] buf Pointer to the buffer to store read data.
+ *  \param[in] size Size of the data in number of characters.
+ *  \return Operation status.
+ *  \retval size Success.
+ *  \retval >=0 Time out, with number of characters read.
+ */
+static int32_t _spi_m_sync_io_read(struct io_descriptor *io, uint8_t *buf, const uint16_t length)
+{
+	ASSERT(io);
+
+	struct spi_m_sync_descriptor *spi = CONTAINER_OF(io, struct spi_m_sync_descriptor, io);
+	struct spi_xfer               xfer;
+
+	xfer.rxbuf = buf;
+	xfer.txbuf = 0;
+	xfer.size  = length;
+
+	return spi_m_sync_transfer(spi, &xfer);
+}
+
+/** \brief Do SPI data write in polling way
+ *  For SPI master, activate CS, do buffer send and deactivate CS. The data back
+ *  is discarded.
+ *
+ *  The data read back is discarded.
+ *
+ *  It blocks until all data sent or error.
+ *
+ *  \param[in, out] spi Pointer to the HAL SPI instance.
+ *  \param[in] p_xfer Pointer to the transfer information (\ref spi_transfer).
+ *  \return Operation status.
+ *  \retval size Success.
+ *  \retval >=0 Timeout, with number of characters transferred.
+ */
+static int32_t _spi_m_sync_io_write(struct io_descriptor *const io, const uint8_t *const buf, const uint16_t length)
+{
+	ASSERT(io);
+
+	struct spi_m_sync_descriptor *spi = CONTAINER_OF(io, struct spi_m_sync_descriptor, io);
+	struct spi_xfer               xfer;
+
+	xfer.rxbuf = 0;
+	xfer.txbuf = (uint8_t *)buf;
+	xfer.size  = length;
+
+	return spi_m_sync_transfer(spi, &xfer);
+}
+
+int32_t spi_m_sync_transfer(struct spi_m_sync_descriptor *spi, const struct spi_xfer *p_xfer)
+{
+	struct spi_msg msg;
+
+	ASSERT(spi && p_xfer);
+
+	msg.txbuf = p_xfer->txbuf;
+	msg.rxbuf = p_xfer->rxbuf;
+	msg.size  = p_xfer->size;
+	return _spi_m_sync_trans(&spi->dev, &msg);
+}
+
+int32_t spi_m_sync_get_io_descriptor(struct spi_m_sync_descriptor *const spi, struct io_descriptor **io)
+{
+	ASSERT(spi && io);
+	*io = &spi->io;
+	return 0;
+}
+
+uint32_t spi_m_sync_get_version(void)
+{
+	return SPI_M_SYNC_DRIVER_VERSION;
+}
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/watch-library/hal/src/hal_usart_sync.c b/watch-library/hal/src/hal_usart_sync.c
new file mode 100755
index 00000000..ab99c1d1
--- /dev/null
+++ b/watch-library/hal/src/hal_usart_sync.c
@@ -0,0 +1,276 @@
+/**
+ * \file
+ *
+ * \brief I/O USART related functionality implementation.
+ *
+ * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include "hal_usart_sync.h"
+#include <utils_assert.h>
+#include <utils.h>
+
+/**
+ * \brief Driver version
+ */
+#define DRIVER_VERSION 0x00000001u
+
+static int32_t usart_sync_write(struct io_descriptor *const io_descr, const uint8_t *const buf, const uint16_t length);
+static int32_t usart_sync_read(struct io_descriptor *const io_descr, uint8_t *const buf, const uint16_t length);
+
+/**
+ * \brief Initialize usart interface
+ */
+int32_t usart_sync_init(struct usart_sync_descriptor *const descr, void *const hw, void *const func)
+{
+	int32_t init_status;
+	ASSERT(descr && hw);
+	init_status = _usart_sync_init(&descr->device, hw);
+	if (init_status) {
+		return init_status;
+	}
+
+	descr->io.read  = usart_sync_read;
+	descr->io.write = usart_sync_write;
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Uninitialize usart interface
+ */
+int32_t usart_sync_deinit(struct usart_sync_descriptor *const descr)
+{
+	ASSERT(descr);
+	_usart_sync_deinit(&descr->device);
+
+	descr->io.read  = NULL;
+	descr->io.write = NULL;
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Enable usart interface
+ */
+int32_t usart_sync_enable(struct usart_sync_descriptor *const descr)
+{
+	ASSERT(descr);
+	_usart_sync_enable(&descr->device);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Disable usart interface
+ */
+int32_t usart_sync_disable(struct usart_sync_descriptor *const descr)
+{
+	ASSERT(descr);
+	_usart_sync_disable(&descr->device);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Retrieve I/O descriptor
+ */
+int32_t usart_sync_get_io_descriptor(struct usart_sync_descriptor *const descr, struct io_descriptor **io)
+{
+	ASSERT(descr && io);
+
+	*io = &descr->io;
+	return ERR_NONE;
+}
+
+/**
+ * \brief Specify action for flow control pins
+ */
+int32_t usart_sync_set_flow_control(struct usart_sync_descriptor *const  descr,
+                                    const union usart_flow_control_state state)
+{
+	ASSERT(descr);
+	_usart_sync_set_flow_control_state(&descr->device, state);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Set usart baud rate
+ */
+int32_t usart_sync_set_baud_rate(struct usart_sync_descriptor *const descr, const uint32_t baud_rate)
+{
+	ASSERT(descr);
+	_usart_sync_set_baud_rate(&descr->device, baud_rate);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Set usart data order
+ */
+int32_t usart_sync_set_data_order(struct usart_sync_descriptor *const descr, const enum usart_data_order data_order)
+{
+	ASSERT(descr);
+	_usart_sync_set_data_order(&descr->device, data_order);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Set usart mode
+ */
+int32_t usart_sync_set_mode(struct usart_sync_descriptor *const descr, const enum usart_mode mode)
+{
+	ASSERT(descr);
+	_usart_sync_set_mode(&descr->device, mode);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Set usart parity
+ */
+int32_t usart_sync_set_parity(struct usart_sync_descriptor *const descr, const enum usart_parity parity)
+{
+	ASSERT(descr);
+	_usart_sync_set_parity(&descr->device, parity);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Set usart stop bits
+ */
+int32_t usart_sync_set_stopbits(struct usart_sync_descriptor *const descr, const enum usart_stop_bits stop_bits)
+{
+	ASSERT(descr);
+	_usart_sync_set_stop_bits(&descr->device, stop_bits);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Set usart character size
+ */
+int32_t usart_sync_set_character_size(struct usart_sync_descriptor *const descr, const enum usart_character_size size)
+{
+	ASSERT(descr);
+	_usart_sync_set_character_size(&descr->device, size);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Retrieve the state of flow control pins
+ */
+int32_t usart_sync_flow_control_status(const struct usart_sync_descriptor *const descr,
+                                       union usart_flow_control_state *const     state)
+{
+	ASSERT(descr && state);
+	*state = _usart_sync_get_flow_control_state(&descr->device);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Check if the usart transmitter is empty
+ */
+int32_t usart_sync_is_tx_empty(const struct usart_sync_descriptor *const descr)
+{
+	ASSERT(descr);
+	return _usart_sync_is_ready_to_send(&descr->device);
+}
+
+/**
+ * \brief Check if the usart receiver is not empty
+ */
+int32_t usart_sync_is_rx_not_empty(const struct usart_sync_descriptor *const descr)
+{
+	ASSERT(descr);
+	return _usart_sync_is_byte_received(&descr->device);
+}
+
+/**
+ * \brief Retrieve the current driver version
+ */
+uint32_t usart_sync_get_version(void)
+{
+	return DRIVER_VERSION;
+}
+
+/*
+ * \internal Write the given data to usart interface
+ *
+ * \param[in] descr The pointer to an io descriptor
+ * \param[in] buf Data to write to usart
+ * \param[in] length The number of bytes to write
+ *
+ * \return The number of bytes written.
+ */
+static int32_t usart_sync_write(struct io_descriptor *const io_descr, const uint8_t *const buf, const uint16_t length)
+{
+	uint32_t                      offset = 0;
+	struct usart_sync_descriptor *descr  = CONTAINER_OF(io_descr, struct usart_sync_descriptor, io);
+
+	ASSERT(io_descr && buf && length);
+	while (!_usart_sync_is_ready_to_send(&descr->device))
+		;
+	do {
+		_usart_sync_write_byte(&descr->device, buf[offset]);
+		while (!_usart_sync_is_ready_to_send(&descr->device))
+			;
+	} while (++offset < length);
+	while (!_usart_sync_is_transmit_done(&descr->device))
+		;
+	return (int32_t)offset;
+}
+
+/*
+ * \internal Read data from usart interface
+ *
+ * \param[in] descr The pointer to an io descriptor
+ * \param[in] buf A buffer to read data to
+ * \param[in] length The size of a buffer
+ *
+ * \return The number of bytes read.
+ */
+static int32_t usart_sync_read(struct io_descriptor *const io_descr, uint8_t *const buf, const uint16_t length)
+{
+	uint32_t                      offset = 0;
+	struct usart_sync_descriptor *descr  = CONTAINER_OF(io_descr, struct usart_sync_descriptor, io);
+
+	ASSERT(io_descr && buf && length);
+	do {
+		while (!_usart_sync_is_byte_received(&descr->device))
+			;
+		buf[offset] = _usart_sync_read_byte(&descr->device);
+	} while (++offset < length);
+
+	return (int32_t)offset;
+}
diff --git a/watch-library/hpl/nvmctrl/hpl_nvmctrl.c b/watch-library/hpl/nvmctrl/hpl_nvmctrl.c
new file mode 100755
index 00000000..c1d42c5e
--- /dev/null
+++ b/watch-library/hpl/nvmctrl/hpl_nvmctrl.c
@@ -0,0 +1,782 @@
+
+/**
+ * \file
+ *
+ * \brief Non-Volatile Memory Controller
+ *
+ * Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include <hpl_flash.h>
+#include <hpl_user_area.h>
+#include <string.h>
+#include <utils_assert.h>
+#include <utils.h>
+#include <hpl_nvmctrl_config.h>
+
+#define NVM_MEMORY ((volatile uint16_t *)FLASH_ADDR)
+
+/**
+ * \brief NVM configuration type
+ */
+struct nvm_configuration {
+	hri_nvmctrl_ctrlb_reg_t ctrlb; /*!< Control B Register */
+};
+
+/**
+ * \brief Array of NVM configurations
+ */
+static struct nvm_configuration _nvm
+    = {(CONF_NVM_CACHE << NVMCTRL_CTRLB_CACHEDIS_Pos) | (CONF_NVM_READ_MODE << NVMCTRL_CTRLB_READMODE_Pos)
+       | (CONF_NVM_SLEEPPRM << NVMCTRL_CTRLB_SLEEPPRM_Pos)};
+
+/*!< Pointer to hpl device */
+static struct _flash_device *_nvm_dev = NULL;
+
+static void _flash_erase_row(void *const hw, const uint32_t dst_addr, uint32_t nvmctrl_cmd);
+static void _flash_program(void *const hw, const uint32_t dst_addr, const uint8_t *buffer, const uint16_t size,
+                           uint32_t nvmctrl_cmd);
+
+/**
+ * \brief Initialize NVM
+ */
+int32_t _flash_init(struct _flash_device *const device, void *const hw)
+{
+	ASSERT(device && (hw == NVMCTRL));
+	uint32_t ctrlb;
+
+	device->hw = hw;
+	ctrlb      = _nvm.ctrlb & ~(NVMCTRL_CTRLB_RWS_Msk | NVMCTRL_CTRLB_MANW);
+	ctrlb |= hri_nvmctrl_get_CTRLB_reg(device->hw, NVMCTRL_CTRLB_RWS_Msk | NVMCTRL_CTRLB_MANW);
+	hri_nvmctrl_write_CTRLB_reg(device->hw, ctrlb);
+
+	_nvm_dev = device;
+	NVIC_DisableIRQ(NVMCTRL_IRQn);
+	NVIC_ClearPendingIRQ(NVMCTRL_IRQn);
+	NVIC_EnableIRQ(NVMCTRL_IRQn);
+	return ERR_NONE;
+}
+
+/**
+ * \brief De-initialize NVM
+ */
+void _flash_deinit(struct _flash_device *const device)
+{
+	device->hw = NULL;
+	NVIC_DisableIRQ(NVMCTRL_IRQn);
+}
+
+/**
+ * \brief Get the flash page size.
+ */
+uint32_t _flash_get_page_size(struct _flash_device *const device)
+{
+	(void)device;
+	return (uint32_t)NVMCTRL_PAGE_SIZE;
+}
+
+/**
+ * \brief Get the numbers of flash page.
+ */
+uint32_t _flash_get_total_pages(struct _flash_device *const device)
+{
+	(void)device;
+	return (uint32_t)FLASH_NB_OF_PAGES;
+}
+
+/**
+ * \brief Get the number of wait states for read and write operations.
+ */
+uint8_t _flash_get_wait_state(struct _flash_device *const device)
+{
+	return hri_nvmctrl_get_CTRLB_reg(device->hw, NVMCTRL_CTRLB_RWS_Msk);
+}
+
+/**
+ * \brief Set the number of wait states for read and write operations.
+ */
+void _flash_set_wait_state(struct _flash_device *const device, uint8_t state)
+{
+	hri_nvmctrl_write_CTRLB_RWS_bf(device->hw, state);
+}
+
+/**
+ * \brief Reads a number of bytes to a page in the internal Flash.
+ */
+void _flash_read(struct _flash_device *const device, const uint32_t src_addr, uint8_t *buffer, uint32_t length)
+{
+	uint32_t nvm_address = src_addr / 2;
+	uint32_t i;
+	uint16_t data;
+
+	/* Check if the module is busy */
+	while (!hri_nvmctrl_get_interrupt_READY_bit(device->hw)) {
+		/* Wait until this module isn't busy */
+	}
+
+	/* Clear flags */
+	hri_nvmctrl_clear_STATUS_reg(device->hw, NVMCTRL_STATUS_MASK);
+
+	/* Check whether byte address is word-aligned*/
+	if (src_addr % 2) {
+		data      = NVM_MEMORY[nvm_address++];
+		buffer[0] = data >> 8;
+		i         = 1;
+	} else {
+		i = 0;
+	}
+
+	/* NVM _must_ be accessed as a series of 16-bit words, perform manual copy
+	 * to ensure alignment */
+	while (i < length) {
+		data      = NVM_MEMORY[nvm_address++];
+		buffer[i] = (data & 0xFF);
+		if (i < (length - 1)) {
+			buffer[i + 1] = (data >> 8);
+		}
+		i += 2;
+	}
+}
+
+/**
+ * \brief Writes a number of bytes to a page in the internal Flash.
+ */
+void _flash_write(struct _flash_device *const device, const uint32_t dst_addr, uint8_t *buffer, uint32_t length)
+{
+	uint8_t  tmp_buffer[NVMCTRL_ROW_PAGES][NVMCTRL_PAGE_SIZE];
+	uint32_t row_start_addr, row_end_addr;
+	uint32_t i, j, k;
+	uint32_t wr_start_addr = dst_addr;
+
+	do {
+		row_start_addr = wr_start_addr & ~((NVMCTRL_PAGE_SIZE * NVMCTRL_ROW_PAGES) - 1);
+		row_end_addr   = row_start_addr + NVMCTRL_ROW_PAGES * NVMCTRL_PAGE_SIZE - 1;
+
+		/* store the erase data into temp buffer before write */
+		for (i = 0; i < NVMCTRL_ROW_PAGES; i++) {
+			_flash_read(device, row_start_addr + i * NVMCTRL_PAGE_SIZE, tmp_buffer[i], NVMCTRL_PAGE_SIZE);
+		}
+
+		/* temp buffer update */
+		j = (wr_start_addr - row_start_addr) / NVMCTRL_PAGE_SIZE;
+		k = wr_start_addr - row_start_addr - j * NVMCTRL_PAGE_SIZE;
+		while ((wr_start_addr <= row_end_addr) && (length > 0)) {
+			tmp_buffer[j][k] = *buffer;
+			k                = (k + 1) % NVMCTRL_PAGE_SIZE;
+			if (0 == k) {
+				j++;
+			}
+			wr_start_addr++;
+			buffer++;
+			length--;
+		}
+
+		/* erase row before write */
+		_flash_erase_row(device->hw, row_start_addr, NVMCTRL_CTRLA_CMD_ER);
+
+		/* write buffer to flash */
+		for (i = 0; i < NVMCTRL_ROW_PAGES; i++) {
+			_flash_program(device->hw,
+			               row_start_addr + i * NVMCTRL_PAGE_SIZE,
+			               tmp_buffer[i],
+			               NVMCTRL_PAGE_SIZE,
+			               NVMCTRL_CTRLA_CMD_WP);
+		}
+
+	} while (row_end_addr < (wr_start_addr + length - 1));
+}
+
+/**
+ * \brief Appends a number of bytes in the internal Flash.
+ */
+void _flash_append(struct _flash_device *const device, const uint32_t dst_addr, uint8_t *buffer, uint32_t length)
+{
+	uint32_t page_start_addr = dst_addr & ~(NVMCTRL_PAGE_SIZE - 1);
+	uint32_t size;
+	uint32_t offset = 0;
+
+	if (dst_addr != page_start_addr) {
+		/* Need to write some data to the end of a page */
+		size = min(length, NVMCTRL_PAGE_SIZE - (dst_addr - page_start_addr));
+		_flash_program(device->hw, dst_addr, buffer, size, NVMCTRL_CTRLA_CMD_WP);
+		page_start_addr += NVMCTRL_PAGE_SIZE;
+		offset += size;
+	}
+
+	while (offset < length) {
+		size = min(length - offset, NVMCTRL_PAGE_SIZE);
+		_flash_program(device->hw, page_start_addr, buffer + offset, size, NVMCTRL_CTRLA_CMD_WP);
+		page_start_addr += NVMCTRL_PAGE_SIZE;
+		offset += size;
+	}
+}
+
+/**
+ * \brief Execute erase in the internal flash
+ */
+void _flash_erase(struct _flash_device *const device, uint32_t dst_addr, uint32_t page_nums)
+{
+	uint8_t  tmp_buffer[NVMCTRL_PAGE_SIZE];
+	uint32_t row_start_addr;
+	uint32_t i;
+
+	row_start_addr = dst_addr & ~((NVMCTRL_PAGE_SIZE * NVMCTRL_ROW_PAGES) - 1);
+
+	memset(tmp_buffer, 0xFF, NVMCTRL_PAGE_SIZE);
+
+	/* when address is not aligned with row start address */
+	if (dst_addr != row_start_addr) {
+		row_start_addr += NVMCTRL_ROW_PAGES * NVMCTRL_PAGE_SIZE;
+		for (i = 0; i < NVMCTRL_ROW_PAGES - 1; i++) {
+			_flash_write(device, dst_addr, tmp_buffer, NVMCTRL_PAGE_SIZE);
+			if (--page_nums == 0) {
+				return;
+			}
+			dst_addr += NVMCTRL_PAGE_SIZE;
+			if (dst_addr == row_start_addr) {
+				break;
+			}
+		}
+	}
+
+	while (page_nums >= NVMCTRL_ROW_PAGES) {
+		_flash_erase_row(device->hw, row_start_addr, NVMCTRL_CTRLA_CMD_ER);
+		row_start_addr += NVMCTRL_ROW_PAGES * NVMCTRL_PAGE_SIZE;
+		page_nums -= NVMCTRL_ROW_PAGES;
+	}
+
+	if (page_nums != 0) {
+		for (i = 0; i < page_nums; i++) {
+			_flash_write(device, row_start_addr, tmp_buffer, NVMCTRL_PAGE_SIZE);
+			row_start_addr += NVMCTRL_PAGE_SIZE;
+		}
+	}
+}
+
+/**
+ * \brief Execute lock in the internal flash
+ */
+int32_t _flash_lock(struct _flash_device *const device, const uint32_t dst_addr, uint32_t page_nums)
+{
+	uint32_t region_pages;
+	uint32_t row_start_addr;
+
+	region_pages   = (uint32_t)NVMCTRL_FLASH_SIZE / (16 * NVMCTRL_PAGE_SIZE);
+	row_start_addr = dst_addr & ~((NVMCTRL_PAGE_SIZE * NVMCTRL_ROW_PAGES) - 1);
+
+	if ((page_nums != region_pages) || (dst_addr != row_start_addr)) {
+		return ERR_INVALID_ARG;
+	}
+
+	while (!hri_nvmctrl_get_interrupt_READY_bit(device->hw)) {
+		/* Wait until this module isn't busy */
+	}
+
+	/* Clear flags */
+	hri_nvmctrl_clear_STATUS_reg(device->hw, NVMCTRL_STATUS_MASK);
+
+	hri_nvmctrl_write_ADDR_reg(device->hw, dst_addr / 2);
+	hri_nvmctrl_write_CTRLA_reg(device->hw, NVMCTRL_CTRLA_CMD_LR | NVMCTRL_CTRLA_CMDEX_KEY);
+
+	return (int32_t)NVMCTRL_FLASH_SIZE / (16 * NVMCTRL_PAGE_SIZE);
+}
+
+/**
+ * \brief Execute unlock in the internal flash
+ */
+int32_t _flash_unlock(struct _flash_device *const device, const uint32_t dst_addr, uint32_t page_nums)
+{
+	uint32_t region_pages;
+	uint32_t row_start_addr;
+
+	region_pages   = (uint32_t)NVMCTRL_FLASH_SIZE / (16 * NVMCTRL_PAGE_SIZE);
+	row_start_addr = dst_addr & ~((NVMCTRL_PAGE_SIZE * NVMCTRL_ROW_PAGES) - 1);
+
+	if ((page_nums != region_pages) || (dst_addr != row_start_addr)) {
+		return ERR_INVALID_ARG;
+	}
+
+	while (!hri_nvmctrl_get_interrupt_READY_bit(device->hw)) {
+		/* Wait until this module isn't busy */
+	}
+
+	/* Clear flags */
+	hri_nvmctrl_clear_STATUS_reg(device->hw, NVMCTRL_STATUS_MASK);
+
+	hri_nvmctrl_write_ADDR_reg(device->hw, dst_addr / 2);
+	hri_nvmctrl_write_CTRLA_reg(device->hw, NVMCTRL_CTRLA_CMD_UR | NVMCTRL_CTRLA_CMDEX_KEY);
+
+	return (int32_t)NVMCTRL_FLASH_SIZE / (16 * NVMCTRL_PAGE_SIZE);
+}
+
+/**
+ * \brief check whether the region which is pointed by address
+ */
+bool _flash_is_locked(struct _flash_device *const device, const uint32_t dst_addr)
+{
+	uint16_t region_id;
+
+	/* Get region for given page */
+	region_id = dst_addr / (NVMCTRL_FLASH_SIZE / 16);
+
+	return !(hri_nvmctrl_get_LOCK_reg(device->hw, 1 << region_id));
+}
+
+/**
+ * \brief Enable/disable Flash interrupt
+ */
+void _flash_set_irq_state(struct _flash_device *const device, const enum _flash_cb_type type, const bool state)
+{
+	ASSERT(device);
+
+	if (FLASH_DEVICE_CB_READY == type) {
+		hri_nvmctrl_write_INTEN_READY_bit(device->hw, state);
+	} else if (FLASH_DEVICE_CB_ERROR == type) {
+		hri_nvmctrl_write_INTEN_ERROR_bit(device->hw, state);
+	}
+}
+
+/**
+ * \internal   erase a row in flash
+ * \param[in]  hw            The pointer to hardware instance
+ * \param[in]  dst_addr      Destination page address to erase
+ */
+static void _flash_erase_row(void *const hw, const uint32_t dst_addr, uint32_t nvmctrl_cmd)
+{
+	while (!hri_nvmctrl_get_interrupt_READY_bit(hw)) {
+		/* Wait until this module isn't busy */
+	}
+
+	/* Clear flags */
+	hri_nvmctrl_clear_STATUS_reg(hw, NVMCTRL_STATUS_MASK);
+
+	/* Set address and command */
+	hri_nvmctrl_write_ADDR_reg(hw, dst_addr / 2);
+	hri_nvmctrl_write_CTRLA_reg(hw, nvmctrl_cmd | NVMCTRL_CTRLA_CMDEX_KEY);
+}
+
+/**
+ * \internal   write a page in flash
+ * \param[in]  hw            The pointer to hardware instance
+ * \param[in]  dst_addr      Destination page address to write
+ * \param[in]  buffer        Pointer to buffer where the data to
+ *                           write is stored
+ * \param[in] size           The size of data to write to a page
+ */
+static void _flash_program(void *const hw, const uint32_t dst_addr, const uint8_t *buffer, const uint16_t size,
+                           uint32_t nvmctrl_cmd)
+{
+	ASSERT(!(dst_addr % 2));
+
+	uint32_t nvm_address = dst_addr / 2;
+	uint16_t i, data;
+
+	while (!hri_nvmctrl_get_interrupt_READY_bit(hw)) {
+		/* Wait until this module isn't busy */
+	}
+
+	hri_nvmctrl_write_CTRLA_reg(hw, NVMCTRL_CTRLA_CMD_PBC | NVMCTRL_CTRLA_CMDEX_KEY);
+
+	while (!hri_nvmctrl_get_interrupt_READY_bit(hw)) {
+		/* Wait until this module isn't busy */
+	}
+
+	/* Clear flags */
+	hri_nvmctrl_clear_STATUS_reg(hw, NVMCTRL_STATUS_MASK);
+
+	for (i = 0; i < size; i += 2) {
+		data = buffer[i];
+		if (i < NVMCTRL_PAGE_SIZE - 1) {
+			data |= (buffer[i + 1] << 8);
+		}
+		NVM_MEMORY[nvm_address++] = data;
+	}
+
+	while (!hri_nvmctrl_get_interrupt_READY_bit(hw)) {
+		/* Wait until this module isn't busy */
+	}
+
+	hri_nvmctrl_write_ADDR_reg(hw, dst_addr / 2);
+	hri_nvmctrl_write_CTRLA_reg(hw, nvmctrl_cmd | NVMCTRL_CTRLA_CMDEX_KEY);
+}
+
+/**
+ * \internal NVM interrupt handler
+ */
+void NVMCTRL_Handler(void)
+{
+	void *const hw = _nvm_dev->hw;
+
+	if (hri_nvmctrl_get_interrupt_READY_bit(hw)) {
+		if (NULL != _nvm_dev->flash_cb.ready_cb) {
+			_nvm_dev->flash_cb.ready_cb(_nvm_dev);
+		}
+	} else if (hri_nvmctrl_get_interrupt_ERROR_bit(hw)) {
+		hri_nvmctrl_clear_interrupt_ERROR_bit(hw);
+		if (NULL != _nvm_dev->flash_cb.error_cb) {
+			_nvm_dev->flash_cb.error_cb(_nvm_dev);
+		}
+	}
+}
+
+/*
+The NVM User Row contains calibration data that are automatically read at device
+power on.
+The NVM User Row can be read at address 0x804000.
+*/
+#ifndef _NVM_USER_ROW_BASE
+#define _NVM_USER_ROW_BASE 0x804000
+#endif
+#define _NVM_USER_ROW_N_BITS 64
+#define _NVM_USER_ROW_N_BYTES (_NVM_USER_ROW_N_BITS / 8)
+#define _NVM_USER_ROW_END (((uint8_t *)_NVM_USER_ROW_BASE) + _NVM_USER_ROW_N_BYTES - 1)
+#define _IS_NVM_USER_ROW(b)                                                                                            \
+	(((uint8_t *)(b) >= (uint8_t *)(_NVM_USER_ROW_BASE)) && ((uint8_t *)(b) <= (uint8_t *)(_NVM_USER_ROW_END)))
+#define _IN_NVM_USER_ROW(b, o) (((uint8_t *)(b) + (o)) <= (uint8_t *)(_NVM_USER_ROW_END))
+
+/*
+The NVM Software Calibration Area can be read at address 0x806020.
+The NVM Software Calibration Area can not be written.
+*/
+#ifndef _NVM_SW_CALIB_AREA_BASE
+#define _NVM_SW_CALIB_AREA_BASE 0x806020
+#endif
+#define _NVM_SW_CALIB_AREA_N_BITS 128
+#define _NVM_SW_CALIB_AREA_N_BYTES (_NVM_SW_CALIB_AREA_N_BITS / 8)
+#define _NVM_SW_CALIB_AREA_END (((uint8_t *)_NVM_SW_CALIB_AREA_BASE) + _NVM_SW_CALIB_AREA_N_BYTES - 1)
+#define _IS_NVM_SW_CALIB_AREA(b)                                                                                       \
+	(((uint8_t *)(b) >= (uint8_t *)_NVM_SW_CALIB_AREA_BASE) && ((uint8_t *)(b) <= (uint8_t *)_NVM_SW_CALIB_AREA_END))
+#define _IN_NVM_SW_CALIB_AREA(b, o) (((uint8_t *)(b) + (o)) <= (uint8_t *)(_NVM_SW_CALIB_AREA_END))
+
+/**
+ * \internal Read left aligned data bits
+ * \param[in] base       Base address for the data
+ * \param[in] bit_offset Offset for the bitfield start
+ * \param[in] n_bits     Number of bits in the bitfield
+ */
+static inline uint32_t _user_area_read_l32_bits(const volatile uint32_t *base, const uint32_t bit_offset,
+                                                const uint8_t n_bits)
+{
+	return base[bit_offset >> 5] & ((1 << n_bits) - 1);
+}
+
+/**
+ * \internal Read right aligned data bits
+ * \param[in] base       Base address for the data
+ * \param[in] bit_offset Offset for the bitfield start
+ * \param[in] n_bits     Number of bits in the bitfield
+ */
+static inline uint32_t _user_area_read_r32_bits(const volatile uint32_t *base, const uint32_t bit_offset,
+                                                const uint8_t n_bits)
+{
+	return (base[bit_offset >> 5] >> (bit_offset & 0x1F)) & ((1 << n_bits) - 1);
+}
+
+int32_t _user_area_read(const void *base, const uint32_t offset, uint8_t *buf, uint32_t size)
+{
+	ASSERT(buf);
+
+	/** Parameter check. */
+	if (_IS_NVM_USER_ROW(base)) {
+		if (!_IN_NVM_USER_ROW(base, offset)) {
+			return ERR_BAD_ADDRESS;
+		}
+		/* Cut off if request too many bytes */
+		if (!_IN_NVM_USER_ROW(base, offset + size - 1)) {
+			return ERR_INVALID_ARG;
+		}
+	} else if (_IS_NVM_SW_CALIB_AREA(base)) {
+		if (!_IN_NVM_SW_CALIB_AREA(base, offset)) {
+			return ERR_BAD_ADDRESS;
+		}
+		/* Cut off if request too many bytes */
+		if (!_IN_NVM_SW_CALIB_AREA(base, offset + size - 1)) {
+			return ERR_INVALID_ARG;
+		}
+	} else {
+		return ERR_UNSUPPORTED_OP;
+	}
+
+	/* Copy data */
+	memcpy(buf, ((uint8_t *)base) + offset, size);
+	return ERR_NONE;
+}
+
+uint32_t _user_area_read_bits(const void *base, const uint32_t bit_offset, const uint8_t n_bits)
+{
+	volatile uint32_t *mem_base = (volatile uint32_t *)base;
+	uint32_t           l_off, l_bits;
+	uint32_t           r_off, r_bits;
+
+	/** Parameter check. */
+	if (_IS_NVM_USER_ROW(base)) {
+		ASSERT(_IN_NVM_USER_ROW(base, bit_offset >> 3) && _IN_NVM_USER_ROW(base, (bit_offset + n_bits - 1) >> 3));
+	} else if (_IS_NVM_SW_CALIB_AREA(base)) {
+		ASSERT(_IN_NVM_SW_CALIB_AREA(base, bit_offset >> 3)
+		       && _IN_NVM_SW_CALIB_AREA(base, (bit_offset + n_bits - 1) >> 3));
+	} else {
+		ASSERT(false);
+	}
+
+	/* Since the bitfield can cross 32-bits boundaries,
+	 * left and right bits are read from 32-bit aligned address
+	 * and then combined together. */
+	l_off  = bit_offset & (~(32 - 1));
+	r_off  = l_off + 32;
+	l_bits = 32 - (bit_offset & (32 - 1));
+	if (n_bits > l_bits) {
+		r_bits = n_bits - l_bits;
+	} else {
+		l_bits = n_bits;
+		r_bits = 0;
+	}
+	return _user_area_read_r32_bits(mem_base, bit_offset, l_bits)
+	       + (_user_area_read_l32_bits(mem_base, r_off, r_bits) << l_bits);
+}
+
+/** \internal Write 64-bit user row
+ *  \param[in] _row Pointer to 64-bit user row data.
+ */
+static int32_t _user_row_write_exec(const uint32_t *_row)
+{
+	Nvmctrl *hw    = NVMCTRL;
+	uint32_t ctrlb = hri_nvmctrl_read_CTRLB_reg(NVMCTRL);
+
+	/* Denie if Security Bit is set */
+	if (hri_nvmctrl_get_STATUS_reg(hw, NVMCTRL_STATUS_SB)) {
+		return ERR_DENIED;
+	}
+
+	/* Do Save */
+
+	/* - Prepare. */
+	while (!hri_nvmctrl_get_INTFLAG_reg(hw, NVMCTRL_INTFLAG_READY)) {
+		/* Wait until this module isn't busy */
+	}
+	hri_nvmctrl_clear_STATUS_reg(hw, NVMCTRL_STATUS_MASK);
+	hri_nvmctrl_set_CTRLB_MANW_bit(hw);
+
+	/* - Erase AUX row. */
+	hri_nvmctrl_write_ADDR_reg(hw, (hri_nvmctrl_addr_reg_t)(_NVM_USER_ROW_BASE / 2));
+	hri_nvmctrl_write_CTRLA_reg(hw, NVMCTRL_CTRLA_CMD_EAR | NVMCTRL_CTRLA_CMDEX_KEY);
+	while (!hri_nvmctrl_get_INTFLAG_reg(hw, NVMCTRL_INTFLAG_READY)) {
+		/* Wait until this module isn't busy */
+	}
+
+	/* - Page buffer clear & write. */
+	hri_nvmctrl_write_CTRLA_reg(hw, NVMCTRL_CTRLA_CMD_PBC | NVMCTRL_CTRLA_CMDEX_KEY);
+	while (!hri_nvmctrl_get_INTFLAG_reg(hw, NVMCTRL_INTFLAG_READY)) {
+		/* Wait until this module isn't busy */
+	}
+	*((uint32_t *)NVMCTRL_AUX0_ADDRESS)       = _row[0];
+	*(((uint32_t *)NVMCTRL_AUX0_ADDRESS) + 1) = _row[1];
+
+	/* - Write AUX row. */
+	hri_nvmctrl_write_ADDR_reg(hw, (hri_nvmctrl_addr_reg_t)(_NVM_USER_ROW_BASE / 2));
+	hri_nvmctrl_write_CTRLA_reg(hw, NVMCTRL_CTRLA_CMD_WAP | NVMCTRL_CTRLA_CMDEX_KEY);
+	while (!hri_nvmctrl_get_INTFLAG_reg(hw, NVMCTRL_INTFLAG_READY)) {
+		/* Wait until this module isn't busy */
+	}
+
+	/* Restore CTRLB */
+	hri_nvmctrl_write_CTRLB_reg(NVMCTRL, ctrlb);
+
+	return ERR_NONE;
+}
+
+int32_t _user_area_write(void *base, const uint32_t offset, const uint8_t *buf, const uint32_t size)
+{
+	uint32_t _row[2]; /* Copy of user row. */
+
+	/** Parameter check. */
+	if (_IS_NVM_USER_ROW(base)) {
+		if (!_IN_NVM_USER_ROW(base, offset)) {
+			return ERR_BAD_ADDRESS;
+		} else if (!_IN_NVM_USER_ROW(base, offset + size - 1)) {
+			return ERR_INVALID_ARG;
+		}
+	} else if (_IS_NVM_SW_CALIB_AREA(base)) {
+		return ERR_DENIED;
+	} else {
+		return ERR_UNSUPPORTED_OP;
+	}
+
+	memcpy(_row, base, 8);                       /* Store previous data. */
+	memcpy((uint8_t *)_row + offset, buf, size); /* Modify with buf data. */
+
+	return _user_row_write_exec(_row);
+}
+
+int32_t _user_area_write_bits(void *base, const uint32_t bit_offset, const uint32_t bits, const uint8_t n_bits)
+{
+	uint32_t _row[2]; /* Copy of user row. */
+	uint32_t l_off, l_bits;
+	uint32_t r_off, r_bits;
+
+	/** Parameter check. */
+	if (_IS_NVM_USER_ROW(base)) {
+		if (!_IN_NVM_USER_ROW(base, bit_offset >> 3)) {
+			return ERR_BAD_ADDRESS;
+		} else if (!_IN_NVM_USER_ROW(base, (bit_offset + n_bits - 1) >> 3)) {
+			return ERR_INVALID_ARG;
+		}
+	} else if (_IS_NVM_SW_CALIB_AREA(base)) {
+		return ERR_DENIED;
+	} else {
+		return ERR_UNSUPPORTED_OP;
+	}
+
+	/* Since the bitfield can cross 32-bits boundaries,
+	 * left and right bits are splitted for 32-bit aligned address
+	 * and then saved. */
+	l_off  = bit_offset & (~(32 - 1));
+	r_off  = l_off + 32;
+	l_bits = 32 - (bit_offset & (32 - 1));
+	if (n_bits > l_bits) {
+		r_bits = n_bits - l_bits;
+	} else {
+		l_bits = n_bits;
+		r_bits = 0;
+	}
+
+	memcpy(_row, base, 8); /* Store previous data. */
+	if (l_bits) {
+		uint32_t l_mask = ((1 << l_bits) - 1) << (bit_offset & (32 - 1));
+		_row[bit_offset >> 5] &= ~l_mask;
+		_row[bit_offset >> 5] |= (bits << (bit_offset & (32 - 1))) & l_mask;
+	}
+	if (r_bits) {
+		uint32_t r_mask = (1 << r_bits) - 1;
+		_row[r_off >> 5] &= ~r_mask;
+		_row[r_off >> 5] |= bits >> l_bits;
+	}
+	return _user_row_write_exec(_row);
+}
+
+/**
+ * \brief Return if given address is in Flash RWWEE array range.
+ */
+static bool _is_valid_rww_flash_address(uint32_t addr)
+{
+#define RWWEE_ADDR_START NVMCTRL_RWW_EEPROM_ADDR
+#define RWWEE_ADDR_END (NVMCTRL_RWW_EEPROM_ADDR + NVMCTRL_PAGE_SIZE * NVMCTRL_RWWEE_PAGES)
+
+	if ((addr < NVMCTRL_RWW_EEPROM_ADDR)
+	    || (addr > (NVMCTRL_RWW_EEPROM_ADDR + NVMCTRL_PAGE_SIZE * NVMCTRL_RWWEE_PAGES))) {
+		return false;
+	}
+	return true;
+}
+
+/**
+ * \brief Get the RWWEE flash page size.
+ */
+uint32_t _rww_flash_get_page_size(struct _flash_device *const device)
+{
+	(void)device;
+	return (uint32_t)NVMCTRL_PAGE_SIZE;
+}
+
+/**
+ * \brief Get the total page numbers of RWWEE flash.
+ */
+uint32_t _rww_flash_get_total_pages(struct _flash_device *const device)
+{
+	(void)device;
+	return (uint32_t)NVMCTRL_RWWEE_PAGES;
+}
+
+/**
+ * \brief Reads a number of bytes in the internal RWWEE Flash.
+ */
+int32_t _rww_flash_read(struct _flash_device *const device, const uint32_t src_addr, uint8_t *buffer, uint32_t length)
+{
+	/* Check if the address is valid */
+	if (!_is_valid_rww_flash_address(src_addr) || !_is_valid_rww_flash_address(src_addr + length)) {
+		return ERR_BAD_ADDRESS;
+	}
+
+	_flash_read(device, src_addr, buffer, length);
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Writes a number of bytes in the internal RWWEE Flash.
+ */
+int32_t _rww_flash_write(struct _flash_device *const device, const uint32_t dst_addr, uint8_t *buffer, uint32_t length)
+{
+	uint8_t  tmp_buffer[NVMCTRL_ROW_PAGES][NVMCTRL_PAGE_SIZE];
+	uint32_t row_start_addr, row_end_addr;
+	uint32_t i, j, k;
+	uint32_t wr_start_addr = dst_addr;
+
+	/* Check if the address is valid */
+	if (!_is_valid_rww_flash_address(dst_addr) || !_is_valid_rww_flash_address(dst_addr + length)) {
+		return ERR_BAD_ADDRESS;
+	}
+
+	do {
+		row_start_addr = wr_start_addr & ~((NVMCTRL_PAGE_SIZE * NVMCTRL_ROW_PAGES) - 1);
+		row_end_addr   = row_start_addr + NVMCTRL_ROW_PAGES * NVMCTRL_PAGE_SIZE - 1;
+
+		/* store the erase data into temp buffer before write */
+		for (i = 0; i < NVMCTRL_ROW_PAGES; i++) {
+			_rww_flash_read(device, row_start_addr + i * NVMCTRL_PAGE_SIZE, tmp_buffer[i], NVMCTRL_PAGE_SIZE);
+		}
+
+		/* temp buffer update */
+		j = (wr_start_addr - row_start_addr) / NVMCTRL_PAGE_SIZE;
+		k = wr_start_addr - row_start_addr - j * NVMCTRL_PAGE_SIZE;
+		while ((wr_start_addr <= row_end_addr) && (length > 0)) {
+			tmp_buffer[j][k] = *buffer;
+			k                = (k + 1) % NVMCTRL_PAGE_SIZE;
+			if (0 == k) {
+				j++;
+			}
+			wr_start_addr++;
+			buffer++;
+			length--;
+		}
+
+		/* erase row before write */
+		_flash_erase_row(device->hw, row_start_addr, NVMCTRL_CTRLA_CMD_RWWEEER);
+
+		/* write buffer to flash */
+		for (i = 0; i < NVMCTRL_ROW_PAGES; i++) {
+			_flash_program(device->hw,
+			               row_start_addr + i * NVMCTRL_PAGE_SIZE,
+			               tmp_buffer[i],
+			               NVMCTRL_PAGE_SIZE,
+			               NVMCTRL_CTRLA_CMD_RWWEEWP);
+		}
+
+	} while (row_end_addr < (wr_start_addr + length - 1));
+
+	return ERR_NONE;
+}
diff --git a/watch-library/hpl/trng/hpl_trng.c b/watch-library/hpl/trng/hpl_trng.c
new file mode 100755
index 00000000..43ede044
--- /dev/null
+++ b/watch-library/hpl/trng/hpl_trng.c
@@ -0,0 +1,110 @@
+/**
+ * \file
+ *
+ * \brief True Random Number Generator
+ *
+ * Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include <err_codes.h>
+#include <hpl_rand_sync.h>
+#include <hpl_trng_config.h>
+#include <utils_assert.h>
+
+static inline int32_t _trng_init(void *hw)
+{
+	if (hri_trng_get_CTRLA_reg(hw, TRNG_CTRLA_ENABLE)) {
+		return ERR_DENIED;
+	}
+	if (CONF_TRNG_RUNSTDBY) {
+		hri_trng_set_CTRLA_RUNSTDBY_bit(hw);
+	} else {
+		hri_trng_clear_CTRLA_RUNSTDBY_bit(hw);
+	}
+	if (CONF_TRNG_DATARDYEO) {
+		hri_trng_set_EVCTRL_DATARDYEO_bit(hw);
+	} else {
+		hri_trng_clear_EVCTRL_DATARDYEO_bit(hw);
+	}
+	return ERR_NONE;
+}
+
+int32_t _rand_sync_init(struct _rand_sync_dev *const dev, void *const hw)
+{
+	int32_t rc;
+
+	ASSERT(dev && hw);
+
+	rc = _trng_init(hw);
+	if (rc == ERR_NONE) {
+		dev->prvt   = hw;
+		dev->n_bits = 32;
+	}
+	return rc;
+}
+
+void _rand_sync_deinit(struct _rand_sync_dev *const dev)
+{
+	_rand_sync_disable(dev);
+}
+
+int32_t _rand_sync_enable(struct _rand_sync_dev *const dev)
+{
+	ASSERT(dev);
+	ASSERT(dev->prvt);
+
+	hri_trng_set_CTRLA_ENABLE_bit(dev->prvt);
+	return ERR_NONE;
+}
+
+void _rand_sync_disable(struct _rand_sync_dev *const dev)
+{
+	ASSERT(dev);
+	ASSERT(dev->prvt);
+
+	hri_trng_clear_CTRLA_ENABLE_bit(dev->prvt);
+}
+
+int32_t _rand_sync_set_seed(struct _rand_sync_dev *const dev, const uint32_t seed)
+{
+	(void)dev;
+	(void)seed;
+	return ERR_UNSUPPORTED_OP;
+}
+
+uint32_t _rand_sync_read_one(const struct _rand_sync_dev *const dev)
+{
+	ASSERT(dev);
+	ASSERT(dev->prvt);
+	ASSERT(hri_trng_get_CTRLA_reg(dev->prvt, TRNG_CTRLA_ENABLE));
+
+	while (!hri_trng_get_INTFLAG_reg(dev->prvt, TRNG_INTFLAG_DATARDY)) {
+		/* Wait until data ready. */
+	}
+	return hri_trng_read_DATA_reg(dev->prvt);
+}