diff options
Diffstat (limited to 'os/hal/ports/NRF5/LLD')
| -rw-r--r-- | os/hal/ports/NRF5/LLD/hal_pal_lld.c | 158 | ||||
| -rw-r--r-- | os/hal/ports/NRF5/LLD/hal_pal_lld.h | 351 | ||||
| -rw-r--r-- | os/hal/ports/NRF5/LLD/hal_serial_lld.c | 335 | ||||
| -rw-r--r-- | os/hal/ports/NRF5/LLD/hal_serial_lld.h | 155 | ||||
| -rw-r--r-- | os/hal/ports/NRF5/LLD/hal_st_lld.c | 302 | ||||
| -rw-r--r-- | os/hal/ports/NRF5/LLD/hal_st_lld.h | 275 |
6 files changed, 1576 insertions, 0 deletions
diff --git a/os/hal/ports/NRF5/LLD/hal_pal_lld.c b/os/hal/ports/NRF5/LLD/hal_pal_lld.c new file mode 100644 index 0000000..cb25ee4 --- /dev/null +++ b/os/hal/ports/NRF5/LLD/hal_pal_lld.c @@ -0,0 +1,158 @@ +/*
+ Copyright (C) 2015 Fabio Utzig
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file pal_lld.c
+ * @brief NRF5 PAL subsystem low level driver source.
+ *
+ * @addtogroup PAL
+ * @{
+ */
+
+#include "osal.h"
+#include "hal.h"
+
+#if (HAL_USE_PAL == TRUE) || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+void _pal_lld_setpadmode(ioportid_t port, uint8_t pad, iomode_t mode)
+{
+ (void)port;
+ osalDbgAssert(pad <= 31, "pal_lld_setpadmode() - invalid pad");
+
+ switch (mode) {
+ case PAL_MODE_RESET:
+ case PAL_MODE_UNCONNECTED:
+ IOPORT1->PIN_CNF[pad] =
+ (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
+ (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
+ (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
+ (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos) |
+ (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
+ break;
+ case PAL_MODE_INPUT:
+ case PAL_MODE_INPUT_ANALOG:
+ IOPORT1->PIN_CNF[pad] =
+ (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
+ (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
+ (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
+ (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
+ (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
+ break;
+ case PAL_MODE_INPUT_PULLUP:
+ IOPORT1->PIN_CNF[pad] =
+ (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
+ (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
+ (GPIO_PIN_CNF_PULL_Pullup << GPIO_PIN_CNF_PULL_Pos) |
+ (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
+ (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
+ break;
+ case PAL_MODE_INPUT_PULLDOWN:
+ IOPORT1->PIN_CNF[pad] =
+ (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
+ (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
+ (GPIO_PIN_CNF_PULL_Pulldown << GPIO_PIN_CNF_PULL_Pos) |
+ (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
+ (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
+ break;
+ case PAL_MODE_OUTPUT_PUSHPULL:
+ IOPORT1->PIN_CNF[pad] =
+ (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
+ (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
+ (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
+ (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos) |
+ (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
+ break;
+ case PAL_MODE_OUTPUT_OPENDRAIN:
+ IOPORT1->PIN_CNF[pad] =
+ (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
+ (GPIO_PIN_CNF_DRIVE_S0D1 << GPIO_PIN_CNF_DRIVE_Pos) |
+ (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
+ (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos) |
+ (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
+ break;
+ default:
+ osalDbgAssert(FALSE, "invalid pal mode");
+ break;
+ }
+}
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief NRF5 I/O ports configuration.
+ *
+ * @param[in] config the NRF5 ports configuration
+ *
+ * @notapi
+ */
+void _pal_lld_init(const PALConfig *config)
+{
+ uint8_t i;
+
+ for (i = 0; i < TOTAL_GPIO_PADS; i++) {
+ pal_lld_setpadmode(IOPORT1, i, config->pads[i]);
+ }
+}
+
+/**
+ * @brief Pads mode setup.
+ * @details This function programs a pads group belonging to the same port
+ * with the specified mode.
+ *
+ * @param[in] port the port identifier
+ * @param[in] mask the group mask
+ * @param[in] mode the mode
+ *
+ * @notapi
+ */
+void _pal_lld_setgroupmode(ioportid_t port,
+ ioportmask_t mask,
+ iomode_t mode)
+{
+ uint8_t i;
+
+ for (i = 0; i < TOTAL_GPIO_PADS; i++, mask >>= 1) {
+ if (mask & 1) {
+ pal_lld_setpadmode(port, i, mode);
+ }
+ }
+}
+
+#endif /* HAL_USE_PAL == TRUE */
+
+/** @} */
diff --git a/os/hal/ports/NRF5/LLD/hal_pal_lld.h b/os/hal/ports/NRF5/LLD/hal_pal_lld.h new file mode 100644 index 0000000..da2da74 --- /dev/null +++ b/os/hal/ports/NRF5/LLD/hal_pal_lld.h @@ -0,0 +1,351 @@ +/*
+ Copyright (C) 2015 Fabio Utzig
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file pal_lld.h
+ * @brief NRF5 PAL subsystem low level driver header.
+ *
+ * @addtogroup PAL
+ * @{
+ */
+
+#ifndef HAL_PAL_LLD_H
+#define HAL_PAL_LLD_H
+
+#if (HAL_USE_PAL == TRUE) || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Unsupported modes and specific modes */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* I/O Ports Types and constants. */
+/*===========================================================================*/
+
+#define TOTAL_GPIO_PADS 32
+
+/**
+ * @name Port related definitions
+ * @{
+ */
+/**
+ * @brief Width, in bits, of an I/O port.
+ */
+#define PAL_IOPORTS_WIDTH 32U
+
+/**
+ * @brief Whole port mask.
+ * @brief This macro specifies all the valid bits into a port.
+ */
+#define PAL_WHOLE_PORT ((ioportmask_t)0xFFFFFFFFU)
+/** @} */
+
+/**
+ * @name Line handling macros
+ * @{
+ */
+/**
+ * @brief Forms a line identifier.
+ * @details A port/pad pair are encoded into an @p ioline_t type. The encoding
+ * of this type is platform-dependent.
+ */
+#define PAL_LINE(port, pad) \
+ ((ioline_t)((uint32_t)(pad)))
+
+/**
+ * @brief Decodes a port identifier from a line identifier.
+ */
+#define PAL_PORT(line) \
+ ((ioportid_t)(IOPORT1))
+
+/**
+ * @brief Decodes a pad identifier from a line identifier.
+ */
+#define PAL_PAD(line) \
+ ((uint32_t)(line))
+
+/**
+ * @brief Value identifying an invalid line.
+ */
+#define PAL_NOLINE ((ioline_t)-1)
+/** @} */
+
+/**
+ * @brief Generic I/O ports static initializer.
+ * @details An instance of this structure must be passed to @p palInit() at
+ * system startup time in order to initialized the digital I/O
+ * subsystem. This represents only the initial setup, specific pads
+ * or whole ports can be reprogrammed at later time.
+ * @note Implementations may extend this structure to contain more,
+ * architecture dependent, fields.
+ */
+typedef struct {
+ uint32_t pads[TOTAL_GPIO_PADS];
+} PALConfig;
+
+/**
+ * @brief Digital I/O port sized unsigned type.
+ */
+typedef uint32_t ioportmask_t;
+
+/**
+ * @brief Digital I/O modes.
+ */
+typedef uint8_t iomode_t;
+
+/**
+ * @brief Type of an I/O line.
+ */
+typedef uint32_t ioline_t;
+
+/**
+ * @brief Port Identifier.
+ * @details This type can be a scalar or some kind of pointer, do not make
+ * any assumption about it, use the provided macros when populating
+ * variables of this type.
+ */
+typedef NRF_GPIO_Type *ioportid_t;
+
+/*===========================================================================*/
+/* I/O Ports Identifiers. */
+/*===========================================================================*/
+
+/**
+ * @brief First I/O port identifier.
+ * @details Low level drivers can define multiple ports, it is suggested to
+ * use this naming convention.
+ */
+#if NRF_SERIE == 51
+#define IOPORT1 NRF_GPIO
+#elif NRF_SERIE == 52
+#define IOPORT1 NRF_P0
+#endif
+
+/*===========================================================================*/
+/* Implementation, some of the following macros could be implemented as */
+/* functions, if so please put them in pal_lld.c. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level PAL subsystem initialization.
+ *
+ * @param[in] config architecture-dependent ports configuration
+ *
+ * @notapi
+ */
+#define pal_lld_init(config) _pal_lld_init(config)
+
+/**
+ * @brief Reads the physical I/O port states.
+ *
+ * @param[in] port port identifier
+ * @return The port bits.
+ *
+ * @notapi
+ */
+#define pal_lld_readport(port) (IOPORT1->IN)
+
+/**
+ * @brief Reads the output latch.
+ * @details The purpose of this function is to read back the latched output
+ * value.
+ *
+ * @param[in] port port identifier
+ * @return The latched logical states.
+ *
+ * @notapi
+ */
+#define pal_lld_readlatch(port) (IOPORT1->OUT)
+
+/**
+ * @brief Writes a bits mask on a I/O port.
+ *
+ * @param[in] port port identifier
+ * @param[in] bits bits to be written on the specified port
+ *
+ * @notapi
+ */
+#define pal_lld_writeport(port, bits) (IOPORT1->OUT = (bits))
+
+/**
+ * @brief Sets a bits mask on a I/O port.
+ * @note The @ref PAL provides a default software implementation of this
+ * functionality, implement this function if can optimize it by using
+ * special hardware functionalities or special coding.
+ *
+ * @param[in] port port identifier
+ * @param[in] bits bits to be ORed on the specified port
+ *
+ * @notapi
+ */
+#define pal_lld_setport(port, bits) (IOPORT1->OUTSET = (bits))
+
+
+/**
+ * @brief Clears a bits mask on a I/O port.
+ * @note The @ref PAL provides a default software implementation of this
+ * functionality, implement this function if can optimize it by using
+ * special hardware functionalities or special coding.
+ *
+ * @param[in] port port identifier
+ * @param[in] bits bits to be cleared on the specified port
+ *
+ * @notapi
+ */
+#define pal_lld_clearport(port, bits) (IOPORT1->OUTCLR = (bits))
+
+/**
+ * @brief Pads group mode setup.
+ * @details This function programs a pads group belonging to the same port
+ * with the specified mode.
+ * @note Programming an unknown or unsupported mode is silently ignored.
+ *
+ * @param[in] port port identifier
+ * @param[in] mask group mask
+ * @param[in] offset group bit offset within the port
+ * @param[in] mode group mode
+ *
+ * @notapi
+ */
+#define pal_lld_setgroupmode(port, mask, offset, mode) \
+ _pal_lld_setgroupmode(port, mask << offset, mode)
+
+/**
+ * @brief Reads a logical state from an I/O pad.
+ * @note The @ref PAL provides a default software implementation of this
+ * functionality, implement this function if can optimize it by using
+ * special hardware functionalities or special coding.
+ *
+ * @param[in] port port identifier
+ * @param[in] pad pad number within the port
+ * @return The logical state.
+ * @retval PAL_LOW low logical state.
+ * @retval PAL_HIGH high logical state.
+ *
+ * @notapi
+ */
+#define pal_lld_readpad(port, pad) \
+ ((IOPORT1->IN & ((uint32_t) 1 << pad)) ? PAL_HIGH : PAL_LOW)
+
+/**
+ * @brief Writes a logical state on an output pad.
+ * @note This function is not meant to be invoked directly by the
+ * application code.
+ * @note The @ref PAL provides a default software implementation of this
+ * functionality, implement this function if can optimize it by using
+ * special hardware functionalities or special coding.
+ *
+ * @param[in] port port identifier
+ * @param[in] pad pad number within the port
+ * @param[in] bit logical value, the value must be @p PAL_LOW or
+ * @p PAL_HIGH
+ *
+ * @notapi
+ */
+#define pal_lld_writepad(port, pad, bit) \
+ do { \
+ (void)port; \
+ if (bit == PAL_HIGH) \
+ IOPORT1->OUTSET = ((uint32_t) 1 << pad); \
+ else \
+ IOPORT1->OUTCLR = ((uint32_t) 1 << pad); \
+ } while (false)
+
+/**
+ * @brief Sets a pad logical state to @p PAL_HIGH.
+ * @note The @ref PAL provides a default software implementation of this
+ * functionality, implement this function if can optimize it by using
+ * special hardware functionalities or special coding.
+ *
+ * @param[in] port port identifier
+ * @param[in] pad pad number within the port
+ *
+ * @notapi
+ */
+#define pal_lld_setpad(port, pad) (IOPORT1->OUTSET = (uint32_t) 1 << (pad))
+
+/**
+ * @brief Clears a pad logical state to @p PAL_LOW.
+ * @note The @ref PAL provides a default software implementation of this
+ * functionality, implement this function if can optimize it by using
+ * special hardware functionalities or special coding.
+ *
+ * @param[in] port port identifier
+ * @param[in] pad pad number within the port
+ *
+ * @notapi
+ */
+#define pal_lld_clearpad(port, pad) (IOPORT1->OUTCLR = (uint32_t) 1 << (pad))
+
+/**
+ * @brief Toggles a pad logical state.
+ * @note The @ref PAL provides a default software implementation of this
+ * functionality, implement this function if can optimize it by using
+ * special hardware functionalities or special coding.
+ *
+ * @param[in] port port identifier
+ * @param[in] pad pad number within the port
+ *
+ * @notapi
+ */
+#define pal_lld_togglepad(port, pad) \
+ do { \
+ uint8_t bit = (IOPORT1->IN >> (pad)) & 1; \
+ if (bit) \
+ IOPORT1->OUTCLR = 1 << (pad); \
+ else \
+ IOPORT1->OUTSET = 1 << (pad); \
+ } while (0)
+
+/**
+ * @brief Pad mode setup.
+ * @details This function programs a pad with the specified mode.
+ * @note The @ref PAL provides a default software implementation of this
+ * functionality, implement this function if can optimize it by using
+ * special hardware functionalities or special coding.
+ * @note Programming an unknown or unsupported mode is silently ignored.
+ *
+ * @param[in] port port identifier
+ * @param[in] pad pad number within the port
+ * @param[in] mode pad mode
+ *
+ * @notapi
+ */
+#define pal_lld_setpadmode(port, pad, mode) _pal_lld_setpadmode(port, pad, mode)
+
+#if !defined(__DOXYGEN__)
+extern const PALConfig pal_default_config;
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void _pal_lld_init(const PALConfig *config);
+ void _pal_lld_setgroupmode(ioportid_t port,
+ ioportmask_t mask,
+ iomode_t mode);
+ void _pal_lld_setpadmode(ioportid_t port,
+ uint8_t pad,
+ iomode_t mode);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HAL_USE_PAL == TRUE */
+
+#endif /* HAL_PAL_LLD_H */
+
+/** @} */
diff --git a/os/hal/ports/NRF5/LLD/hal_serial_lld.c b/os/hal/ports/NRF5/LLD/hal_serial_lld.c new file mode 100644 index 0000000..cba7804 --- /dev/null +++ b/os/hal/ports/NRF5/LLD/hal_serial_lld.c @@ -0,0 +1,335 @@ +/*
+ Copyright (C) 2015 Fabio Utzig
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file serial_lld.c
+ * @brief NRF51822 serial subsystem low level driver source.
+ *
+ * @addtogroup SERIAL
+ * @{
+ */
+
+#include "hal.h"
+
+#if (HAL_USE_SERIAL == TRUE) || defined(__DOXYGEN__)
+
+#if NRF_SERIE == 51
+#include "nrf51.h"
+#elif NRF_SERIE == 52
+#include "nrf52.h"
+#define UART0_IRQn UARTE0_UART0_IRQn
+#endif
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/** @brief USART1 serial driver identifier.*/
+#if (NRF51_SERIAL_USE_UART0 == TRUE) || defined(__DOXYGEN__)
+SerialDriver SD1;
+#endif
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/**
+ * @brief Driver default configuration.
+ */
+static const SerialConfig default_config = {
+ .speed = 38400,
+ .tx_pad = NRF51_SERIAL_PAD_DISCONNECTED,
+ .rx_pad = NRF51_SERIAL_PAD_DISCONNECTED,
+#if (NRF51_SERIAL_USE_HWFLOWCTRL == TRUE)
+ .rts_pad = NRF51_SERIAL_PAD_DISCONNECTED,
+ .cts_pad = NRF51_SERIAL_PAD_DISCONNECTED,
+#endif
+};
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*
+ * @brief Maps a baudrate speed to a BAUDRATE register value.
+ */
+
+/**
+ * @brief Common UART configuration.
+ *
+ */
+static void configure_uart(const SerialConfig *config)
+{
+ uint32_t speed = UART_BAUDRATE_BAUDRATE_Baud250000;
+
+ switch (config->speed) {
+ case 1200: speed = UART_BAUDRATE_BAUDRATE_Baud1200; break;
+ case 2400: speed = UART_BAUDRATE_BAUDRATE_Baud2400; break;
+ case 4800: speed = UART_BAUDRATE_BAUDRATE_Baud4800; break;
+ case 9600: speed = UART_BAUDRATE_BAUDRATE_Baud9600; break;
+ case 14400: speed = UART_BAUDRATE_BAUDRATE_Baud14400; break;
+ case 19200: speed = UART_BAUDRATE_BAUDRATE_Baud19200; break;
+ case 28800: speed = UART_BAUDRATE_BAUDRATE_Baud28800; break;
+ case 38400: speed = UART_BAUDRATE_BAUDRATE_Baud38400; break;
+ case 57600: speed = UART_BAUDRATE_BAUDRATE_Baud57600; break;
+ case 76800: speed = UART_BAUDRATE_BAUDRATE_Baud76800; break;
+ case 115200: speed = UART_BAUDRATE_BAUDRATE_Baud115200; break;
+ case 230400: speed = UART_BAUDRATE_BAUDRATE_Baud230400; break;
+ case 250000: speed = UART_BAUDRATE_BAUDRATE_Baud250000; break;
+ case 460800: speed = UART_BAUDRATE_BAUDRATE_Baud460800; break;
+ case 921600: speed = UART_BAUDRATE_BAUDRATE_Baud921600; break;
+ case 1000000: speed = UART_BAUDRATE_BAUDRATE_Baud1M; break;
+ default: osalDbgAssert(0, "invalid baudrate"); break;
+ };
+
+ /* Configure PINs mode */
+ if (config->tx_pad != NRF51_SERIAL_PAD_DISCONNECTED) {
+ palSetPadMode(IOPORT1, config->tx_pad, PAL_MODE_OUTPUT_PUSHPULL);
+ }
+ if (config->rx_pad != NRF51_SERIAL_PAD_DISCONNECTED) {
+ palSetPadMode(IOPORT1, config->rx_pad, PAL_MODE_INPUT);
+ }
+#if (NRF51_SERIAL_USE_HWFLOWCTRL == TRUE)
+ if (config->rts_pad != NRF51_SERIAL_PAD_DISCONNECTED) {
+ palSetPadMode(IOPORT1, config->rts_pad, PAL_MODE_OUTPUT_PUSHPULL);
+ }
+ if (config->cts_pad != NRF51_SERIAL_PAD_DISCONNECTED) {
+ palSetPadMode(IOPORT1, config->cts_pad, PAL_MODE_INPUT);
+ }
+#endif
+
+ /* Select PINs used by UART */
+ NRF_UART0->PSELTXD = config->tx_pad;
+ NRF_UART0->PSELRXD = config->rx_pad;
+#if (NRF51_SERIAL_USE_HWFLOWCTRL == TRUE)
+ NRF_UART0->PSELRTS = config->rts_pad;
+ NRF_UART0->PSELCTS = config->cts_pad;
+#else
+ NRF_UART0->PSELRTS = NRF51_SERIAL_PAD_DISCONNECTED;
+ NRF_UART0->PSELCTS = NRF51_SERIAL_PAD_DISCONNECTED;
+#endif
+
+ /* Set baud rate */
+ NRF_UART0->BAUDRATE = speed;
+
+ /* Set config */
+ NRF_UART0->CONFIG = (UART_CONFIG_PARITY_Excluded << UART_CONFIG_PARITY_Pos);
+
+ /* Adjust flow control */
+#if (NRF51_SERIAL_USE_HWFLOWCTRL == TRUE)
+ if ((config->rts_pad < TOTAL_GPIO_PADS) ||
+ (config->cts_pad < TOTAL_GPIO_PADS)) {
+ NRF_UART0->CONFIG |= UART_CONFIG_HWFC_Enabled << UART_CONFIG_HWFC_Pos;
+ } else {
+ NRF_UART0->CONFIG &= ~(UART_CONFIG_HWFC_Enabled << UART_CONFIG_HWFC_Pos);
+ }
+#else
+ NRF_UART0->CONFIG &= ~(UART_CONFIG_HWFC_Enabled << UART_CONFIG_HWFC_Pos);
+#endif
+
+ /* Enable UART and clear events */
+ NRF_UART0->ENABLE = UART_ENABLE_ENABLE_Enabled;
+ NRF_UART0->EVENTS_RXDRDY = 0;
+ (void)NRF_UART0->EVENTS_RXDRDY;
+ NRF_UART0->EVENTS_TXDRDY = 0;
+ (void)NRF_UART0->EVENTS_TXDRDY;
+
+ if (config->rx_pad != NRF51_SERIAL_PAD_DISCONNECTED) {
+ while (NRF_UART0->EVENTS_RXDRDY != 0) {
+ (void)NRF_UART0->RXD;
+ }
+ }
+}
+
+
+/**
+ * @brief Driver output notification.
+ */
+#if NRF51_SERIAL_USE_UART0 || defined(__DOXYGEN__)
+static void notify1(io_queue_t *qp)
+{
+ SerialDriver *sdp = &SD1;
+
+ (void)qp;
+
+ if (NRF_UART0->PSELTXD == NRF51_SERIAL_PAD_DISCONNECTED)
+ return;
+
+ if (!sdp->tx_busy) {
+ msg_t b = oqGetI(&sdp->oqueue);
+
+ if (b < Q_OK) {
+ chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY);
+ NRF_UART0->TASKS_STOPTX = 1;
+ return;
+ }
+ sdp->tx_busy = 1;
+ NRF_UART0->TASKS_STARTTX = 1;
+ NRF_UART0->TXD = b;
+ }
+}
+#endif
+
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+#if NRF51_SERIAL_USE_UART0 || defined(__DOXYGEN__)
+OSAL_IRQ_HANDLER(Vector48) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ SerialDriver *sdp = &SD1;
+ uint32_t isr = NRF_UART0->INTENSET;
+
+ if ((NRF_UART0->EVENTS_RXDRDY != 0) && (isr & UART_INTENSET_RXDRDY_Msk)) {
+ // Clear UART RX event flag
+ NRF_UART0->EVENTS_RXDRDY = 0;
+ (void)NRF_UART0->EVENTS_RXDRDY;
+
+ osalSysLockFromISR();
+ if (iqIsEmptyI(&sdp->iqueue))
+ chnAddFlagsI(sdp, CHN_INPUT_AVAILABLE);
+ if (iqPutI(&sdp->iqueue, NRF_UART0->RXD) < Q_OK)
+ chnAddFlagsI(sdp, SD_OVERRUN_ERROR);
+ osalSysUnlockFromISR();
+ }
+
+ if ((NRF_UART0->EVENTS_TXDRDY != 0) && (isr & UART_INTENSET_TXDRDY_Msk)) {
+ msg_t b;
+
+ // Clear UART TX event flag.
+ NRF_UART0->EVENTS_TXDRDY = 0;
+ (void)NRF_UART0->EVENTS_TXDRDY;
+
+ osalSysLockFromISR();
+ b = oqGetI(&sdp->oqueue);
+ osalSysUnlockFromISR();
+
+ if (b < Q_OK) {
+ osalSysLockFromISR();
+ chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY);
+ osalSysUnlockFromISR();
+ NRF_UART0->TASKS_STOPTX = 1;
+ sdp->tx_busy = 0;
+ } else {
+ sdp->tx_busy = 1;
+ NRF_UART0->TXD = b;
+ }
+ }
+
+ /* TODO: Error handling for EVENTS_ERROR */
+ if ((NRF_UART0->EVENTS_ERROR != 0) && (isr & UART_INTENSET_ERROR_Msk)) {
+ // Clear UART ERROR event flag.
+ NRF_UART0->EVENTS_ERROR = 0;
+ (void)NRF_UART0->EVENTS_ERROR;
+ }
+
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level serial driver initialization.
+ *
+ * @notapi
+ */
+void sd_lld_init(void) {
+
+#if NRF51_SERIAL_USE_UART0 == TRUE
+ sdObjectInit(&SD1, NULL, notify1);
+#endif
+}
+
+/**
+ * @brief Low level serial driver configuration and (re)start.
+ *
+ * @param[in] sdp pointer to a @p SerialDriver object
+ * @param[in] config the architecture-dependent serial driver configuration.
+ * If this parameter is set to @p NULL then a default
+ * configuration is used.
+ *
+ * @notapi
+ */
+void sd_lld_start(SerialDriver *sdp, const SerialConfig *config) {
+
+ if (config == NULL)
+ config = &default_config;
+
+ osalDbgAssert(
+ (config->rx_pad < TOTAL_GPIO_PADS) || (config->tx_pad < TOTAL_GPIO_PADS),
+ "must configure at least an RX or TX pad");
+
+ if (sdp->state == SD_STOP) {
+
+#if NRF51_SERIAL_USE_UART0 == TRUE
+ if (sdp == &SD1) {
+ configure_uart(config);
+
+ // Enable UART interrupt
+ NRF_UART0->INTENCLR = (uint32_t)-1;
+ NRF_UART0->INTENSET = UART_INTENSET_ERROR_Msk;
+ if (config->rx_pad != NRF51_SERIAL_PAD_DISCONNECTED)
+ NRF_UART0->INTENSET |= UART_INTENSET_RXDRDY_Msk;
+ if (config->tx_pad != NRF51_SERIAL_PAD_DISCONNECTED)
+ NRF_UART0->INTENSET |= UART_INTENSET_TXDRDY_Msk;
+
+ nvicEnableVector(UART0_IRQn, NRF51_SERIAL_UART0_PRIORITY);
+
+ if (config->rx_pad != NRF51_SERIAL_PAD_DISCONNECTED)
+ NRF_UART0->TASKS_STARTRX = 1;
+ }
+#endif
+
+ }
+}
+
+/**
+ * @brief Low level serial driver stop.
+ * @details De-initializes the USART, stops the associated clock, resets the
+ * interrupt vector.
+ *
+ * @param[in] sdp pointer to a @p SerialDriver object
+ *
+ * @notapi
+ */
+void sd_lld_stop(SerialDriver *sdp) {
+
+ if (sdp->state == SD_READY) {
+
+#if NRF51_SERIAL_USE_UART0 == TRUE
+ if (&SD1 == sdp) {
+ nvicDisableVector(UART0_IRQn);
+ NRF_UART0->ENABLE = UART_ENABLE_ENABLE_Disabled;
+ }
+#endif
+ }
+}
+
+#endif /* HAL_USE_SERIAL == TRUE */
+
+/** @} */
diff --git a/os/hal/ports/NRF5/LLD/hal_serial_lld.h b/os/hal/ports/NRF5/LLD/hal_serial_lld.h new file mode 100644 index 0000000..79955b1 --- /dev/null +++ b/os/hal/ports/NRF5/LLD/hal_serial_lld.h @@ -0,0 +1,155 @@ +/*
+ Copyright (C) 2015 Fabio Utzig
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file serial_lld.h
+ * @brief NRF51822 serial subsystem low level driver header.
+ *
+ * @addtogroup SERIAL
+ * @{
+ */
+
+#ifndef HAL_SERIAL_LLD_H
+#define HAL_SERIAL_LLD_H
+
+#if (HAL_USE_SERIAL == TRUE) || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @name PLATFORM configuration options
+ * @{
+ */
+/**
+ * @brief SD flow control enable switch.
+ * @details If set to @p TRUE the support for hardware flow control
+ * is included.
+ * @note The default is @p FALSE.
+ */
+#if !defined(NRF51_SERIAL_USE_HWFLOWCTRL) || defined(__DOXYGEN__)
+#define NRF51_SERIAL_USE_HWFLOWCTRL FALSE
+#endif
+
+/**
+ * @brief SD1 driver enable switch.
+ * @details If set to @p TRUE the support for SD1 is included.
+ * @note The default is @p FALSE.
+ */
+#if !defined(NRF51_SERIAL_USE_UART0) || defined(__DOXYGEN__)
+#define NRF51_SERIAL_USE_UART0 FALSE
+#endif
+
+/**
+ * @brief UART0 interrupt priority level setting.
+ */
+#if !defined(NRF51_SERIAL_UART0_PRIORITY) || defined(__DOXYGEN__)
+#define NRF51_SERIAL_UART0_PRIORITY 3
+#endif
+
+/* Value indicating that no pad is connected to this UART register. */
+#define NRF51_SERIAL_PAD_DISCONNECTED 0xFFFFFFFFU
+#define NRF51_SERIAL_INVALID_BAUDRATE 0xFFFFFFFFU
+
+/** @} */
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+#if NRF51_SERIAL_USE_UART0 && \
+ !OSAL_IRQ_IS_VALID_PRIORITY(NRF51_SERIAL_UART0_PRIORITY)
+#error "Invalid IRQ priority assigned to UART0"
+#endif
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief NRF51 Serial Driver configuration structure.
+ * @details An instance of this structure must be passed to @p sdStart()
+ * in order to configure and start a serial driver operations.
+ * @note This structure content is architecture dependent, each driver
+ * implementation defines its own version and the custom static
+ * initializers.
+ */
+typedef struct {
+ /**
+ * @brief Bit rate.
+ */
+ uint32_t speed;
+ /* End of the mandatory fields.*/
+ uint32_t tx_pad;
+ uint32_t rx_pad;
+#if (NRF51_SERIAL_USE_HWFLOWCTRL == TRUE)
+ uint32_t rts_pad;
+ uint32_t cts_pad;
+#endif
+} SerialConfig;
+
+/**
+ * @brief @p SerialDriver specific data.
+ */
+#define _serial_driver_data \
+ _base_asynchronous_channel_data \
+ /* Driver state.*/ \
+ sdstate_t state; \
+ /* Input queue.*/ \
+ input_queue_t iqueue; \
+ /* Output queue.*/ \
+ output_queue_t oqueue; \
+ /* Input circular buffer.*/ \
+ uint8_t ib[SERIAL_BUFFERS_SIZE]; \
+ /* Output circular buffer.*/ \
+ uint8_t ob[SERIAL_BUFFERS_SIZE]; \
+ /* 1 if port is busy transmitting, 0 otherwise. */ \
+ uint8_t tx_busy; \
+ /* End of the mandatory fields.*/ \
+ thread_t *thread;
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#if (NRF51_SERIAL_USE_UART0 == TRUE) && !defined(__DOXYGEN__)
+extern SerialDriver SD1;
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void sd_lld_init(void);
+ void sd_lld_start(SerialDriver *sdp, const SerialConfig *config);
+ void sd_lld_stop(SerialDriver *sdp);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HAL_USE_SERIAL == TRUE */
+
+#endif /* HAL_SERIAL_LLD_H */
+
+/** @} */
diff --git a/os/hal/ports/NRF5/LLD/hal_st_lld.c b/os/hal/ports/NRF5/LLD/hal_st_lld.c new file mode 100644 index 0000000..3a988a8 --- /dev/null +++ b/os/hal/ports/NRF5/LLD/hal_st_lld.c @@ -0,0 +1,302 @@ +/*
+ ChibiOS - Copyright (C) 2015 Fabio Utzig
+ 2016 Stephane D'Alu
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file st_lld.c
+ * @brief NRF51822 ST subsystem low level driver source.
+ *
+ * @addtogroup ST
+ * @{
+ */
+
+#include "hal.h"
+
+#if (OSAL_ST_MODE != OSAL_ST_MODE_NONE) || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+#if (OSAL_ST_MODE == OSAL_ST_MODE_PERIODIC) || defined(__DOXYGEN__)
+#if NRF51_ST_USE_RTC0 == TRUE
+/**
+ * @brief System Timer vector (RTC0)
+ * @details This interrupt is used for system tick in periodic mode
+ * if selected with NRF51_ST_USE_RTC0
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(Vector6C) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ NRF_RTC0->EVENTS_TICK = 0;
+ (void)NRF_RTC0->EVENTS_TICK;
+
+ osalSysLockFromISR();
+ osalOsTimerHandlerI();
+ osalSysUnlockFromISR();
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+
+#if NRF51_ST_USE_RTC1 == TRUE
+/**
+ * @brief System Timer vector (RTC1)
+ * @details This interrupt is used for system tick in periodic mode
+ * if selected with NRF51_ST_USE_RTC1
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(Vector84) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ NRF_RTC1->EVENTS_TICK = 0;
+ (void)NRF_RTC1->EVENTS_TICK;
+
+ osalSysLockFromISR();
+ osalOsTimerHandlerI();
+ osalSysUnlockFromISR();
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+
+#if NRF51_ST_USE_TIMER0 == TRUE
+/**
+ * @brief System Timer vector. (TIMER0)
+ * @details This interrupt is used for system tick in periodic mode
+ * if selected with NRF51_ST_USE_TIMER0
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(Vector60) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ /* Clear timer compare event */
+ if (NRF_TIMER0->EVENTS_COMPARE[0] != 0) {
+ NRF_TIMER0->EVENTS_COMPARE[0] = 0;
+ (void)NRF_TIMER0->EVENTS_COMPARE[0];
+
+ osalSysLockFromISR();
+ osalOsTimerHandlerI();
+ osalSysUnlockFromISR();
+ }
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+#endif /* OSAL_ST_MODE == OSAL_ST_MODE_PERIODIC */
+
+#if (OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING) || defined(__DOXYGEN__)
+#if NRF51_ST_USE_RTC0 == TRUE
+/**
+ * @brief System Timer vector (RTC0)
+ * @details This interrupt is used for freerunning mode (tick-less)
+ * if selected with NRF51_ST_USE_RTC0
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(Vector6C) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ if (NRF_RTC0->EVENTS_COMPARE[0]) {
+ NRF_RTC0->EVENTS_COMPARE[0] = 0;
+ (void)NRF_RTC0->EVENTS_COMPARE[0];
+
+ osalSysLockFromISR();
+ osalOsTimerHandlerI();
+ osalSysUnlockFromISR();
+ }
+
+#if OSAL_ST_RESOLUTION == 16
+ if (NRF_RTC0->EVENTS_COMPARE[1]) {
+ NRF_RTC0->EVENTS_COMPARE[1] = 0;
+ (void)NRF_RTC0->EVENTS_COMPARE[1];
+ NRF_RTC0->TASKS_CLEAR = 1;
+ }
+#endif
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+
+#if NRF51_ST_USE_RTC1 == TRUE
+/**
+ * @brief System Timer vector (RTC1)
+ * @details This interrupt is used for freerunning mode (tick-less)
+ * if selected with NRF51_ST_USE_RTC1
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(Vector84) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ if (NRF_RTC1->EVENTS_COMPARE[0]) {
+ NRF_RTC1->EVENTS_COMPARE[0] = 0;
+ (void)NRF_RTC1->EVENTS_COMPARE[0];
+
+ osalSysLockFromISR();
+ osalOsTimerHandlerI();
+ osalSysUnlockFromISR();
+ }
+
+#if OSAL_ST_RESOLUTION == 16
+ if (NRF_RTC1->EVENTS_COMPARE[1]) {
+ NRF_RTC1->EVENTS_COMPARE[1] = 0;
+ (void)NRF_RTC1->EVENTS_COMPARE[1];
+ NRF_RTC1->TASKS_CLEAR = 1;
+ }
+#endif
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+#endif /* OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING */
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level ST driver initialization.
+ *
+ * @notapi
+ */
+void st_lld_init(void) {
+#if OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING
+
+#if NRF51_ST_USE_RTC0 == TRUE
+ /* Using RTC with prescaler */
+ NRF_RTC0->TASKS_STOP = 1;
+ NRF_RTC0->PRESCALER = (NRF51_LFCLK_FREQUENCY / OSAL_ST_FREQUENCY) - 1;
+ NRF_RTC0->EVTENCLR = RTC_EVTENSET_COMPARE0_Msk;
+ NRF_RTC0->EVENTS_COMPARE[0] = 0;
+ NRF_RTC0->INTENSET = RTC_INTENSET_COMPARE0_Msk;
+#if OSAL_ST_RESOLUTION == 16
+ NRF_RTC0->CC[1] = 0x10000; /* 2^16 */
+ NRF_RTC0->EVENTS_COMPARE[1] = 0;
+ NRF_RTC0->EVTENSET = RTC_EVTENSET_COMPARE0_Msk;
+ NRF_RTC0->INTENSET = RTC_INTENSET_COMPARE1_Msk;
+#endif
+ NRF_RTC0->TASKS_CLEAR = 1;
+
+ /* Start timer */
+ nvicEnableVector(RTC0_IRQn, NRF51_ST_PRIORITY);
+ NRF_RTC0->TASKS_START = 1;
+#endif /* NRF51_ST_USE_RTC0 == TRUE */
+
+#if NRF51_ST_USE_RTC1 == TRUE
+ /* Using RTC with prescaler */
+ NRF_RTC1->TASKS_STOP = 1;
+ NRF_RTC1->PRESCALER = (NRF51_LFCLK_FREQUENCY / OSAL_ST_FREQUENCY) - 1;
+ NRF_RTC1->EVTENCLR = RTC_EVTENSET_COMPARE0_Msk;
+ NRF_RTC1->EVENTS_COMPARE[0] = 0;
+ NRF_RTC1->INTENSET = RTC_INTENSET_COMPARE0_Msk;
+#if OSAL_ST_RESOLUTION == 16
+ NRF_RTC1->CC[1] = 0x10000; /* 2^16 */
+ NRF_RTC1->EVENTS_COMPARE[1] = 0;
+ NRF_RTC1->EVTENSET = RTC_EVTENSET_COMPARE0_Msk;
+ NRF_RTC1->INTENSET = RTC_INTENSET_COMPARE1_Msk;
+#endif
+ NRF_RTC1->TASKS_CLEAR = 1;
+
+ /* Start timer */
+ nvicEnableVector(RTC1_IRQn, NRF51_ST_PRIORITY);
+ NRF_RTC1->TASKS_START = 1;
+#endif /* NRF51_ST_USE_RTC1 == TRUE */
+
+#endif /* OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING */
+
+#if OSAL_ST_MODE == OSAL_ST_MODE_PERIODIC
+
+#if NRF51_ST_USE_RTC0 == TRUE
+ /* Using RTC with prescaler */
+ NRF_RTC0->TASKS_STOP = 1;
+ NRF_RTC0->PRESCALER = (NRF51_LFCLK_FREQUENCY / OSAL_ST_FREQUENCY) - 1;
+ NRF_RTC0->INTENSET = RTC_INTENSET_TICK_Msk;
+
+ /* Start timer */
+ nvicEnableVector(RTC0_IRQn, NRF51_ST_PRIORITY);
+ NRF_RTC0->TASKS_START = 1;
+#endif /* NRF51_ST_USE_RTC0 == TRUE */
+
+#if NRF51_ST_USE_RTC1 == TRUE
+ /* Using RTC with prescaler */
+ NRF_RTC1->TASKS_STOP = 1;
+ NRF_RTC1->PRESCALER = (NRF51_LFCLK_FREQUENCY / OSAL_ST_FREQUENCY) - 1;
+ NRF_RTC1->INTENSET = RTC_INTENSET_TICK_Msk;
+
+ /* Start timer */
+ nvicEnableVector(RTC1_IRQn, NRF51_ST_PRIORITY);
+ NRF_RTC1->TASKS_START = 1;
+#endif /* NRF51_ST_USE_RTC1 == TRUE */
+
+#if NRF51_ST_USE_TIMER0 == TRUE
+ NRF_TIMER0->TASKS_CLEAR = 1;
+
+ /*
+ * Using 32-bit mode with prescaler 16 configures this
+ * timer with a 1MHz clock.
+ */
+ NRF_TIMER0->BITMODE = 3;
+ NRF_TIMER0->PRESCALER = 4;
+
+ /*
+ * Configure timer 0 compare capture 0 to generate interrupt
+ * and clear timer value when event is generated.
+ */
+ NRF_TIMER0->CC[0] = (1000000 / OSAL_ST_FREQUENCY) - 1;
+ NRF_TIMER0->SHORTS = 1;
+ NRF_TIMER0->INTENSET = 0x10000;
+
+ /* Start timer */
+ nvicEnableVector(TIMER0_IRQn, NRF51_ST_PRIORITY);
+ NRF_TIMER0->TASKS_START = 1;
+#endif /* NRF51_ST_USE_TIMER0 == TRUE */
+
+#endif /* OSAL_ST_MODE == OSAL_ST_MODE_PERIODIC */
+}
+
+#endif /* OSAL_ST_MODE != OSAL_ST_MODE_NONE */
+
+/** @} */
diff --git a/os/hal/ports/NRF5/LLD/hal_st_lld.h b/os/hal/ports/NRF5/LLD/hal_st_lld.h new file mode 100644 index 0000000..33cc0fb --- /dev/null +++ b/os/hal/ports/NRF5/LLD/hal_st_lld.h @@ -0,0 +1,275 @@ +/*
+ ChibiOS - Copyright (C) 2015 Fabio Utzig
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file st_lld.h
+ * @brief NRF51822 ST subsystem low level driver header.
+ * @details This header is designed to be include-able without having to
+ * include other files from the HAL.
+ *
+ * @addtogroup ST
+ * @{
+ */
+
+#ifndef HAL_ST_LLD_H
+#define HAL_ST_LLD_H
+
+#include "halconf.h"
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @brief Use RTC0 to generates system ticks
+ */
+#if !defined(NRF51_ST_USE_RTC0) || defined(__DOXYGEN__)
+#if !defined(SOFTDEVICE_PRESENT)
+#define NRF51_ST_USE_RTC0 TRUE
+#else
+#define NRF51_ST_USE_RTC0 FALSE
+#endif
+#endif
+
+/**
+ * @brief Use RTC1 to generates system ticks
+ */
+#if !defined(NRF51_ST_USE_RTC1) || defined(__DOXYGEN__)
+#if !defined(SOFTDEVICE_PRESENT)
+#define NRF51_ST_USE_RTC1 FALSE
+#else
+#define NRF51_ST_USE_RTC1 TRUE
+#endif
+#endif
+
+/**
+ * @brief Use TIMER0 to generates system ticks
+ */
+#if !defined(NRF51_ST_USE_TIMER0) || defined(__DOXYGEN__)
+#define NRF51_ST_USE_TIMER0 FALSE
+#endif
+
+/**
+ * @brief ST interrupt priority level setting.
+ */
+#if !defined(NRF51_ST_PRIORITY) || defined(__DOXYGEN__)
+#if !defined(SOFTDEVICE_PRESENT)
+#define NRF51_ST_PRIORITY CORTEX_MAX_KERNEL_PRIORITY
+#else
+#define NRF51_ST_PRIORITY 1
+#endif
+#endif
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+#if OSAL_ST_MODE != OSAL_ST_MODE_NONE
+#if (NRF51_ST_USE_TIMER0 == TRUE) && (NRF51_GPT_USE_TIMER0 == TRUE)
+#error "TIMER0 already used by GPT driver"
+#endif
+
+#if (NRF51_ST_USE_RTC0 == FALSE) && \
+ (NRF51_ST_USE_RTC1 == FALSE) && \
+ (NRF51_ST_USE_TIMER0 == FALSE)
+#error "One clock source is needed, enable one (RTC0, RTC1, or TIMER0)"
+#endif
+
+#if ((NRF51_ST_USE_RTC0 == TRUE ? 1 : 0) + \
+ (NRF51_ST_USE_RTC1 == TRUE ? 1 : 0) + \
+ (NRF51_ST_USE_TIMER0 == TRUE ? 1 : 0)) > 1
+#error "Only one clock source can be used (RTC0, RTC1, or TIMER0)"
+#endif
+
+#if defined(SOFTDEVICE_PRESENT)
+#if NRF51_ST_USE_RTC0 == TRUE
+#error "RTC0 cannot be used for system ticks when SOFTDEVICE present"
+#endif
+
+#if NRF51_ST_USE_TIMER0 == TRUE
+#error "TIMER0 cannot be used for system ticks when SOFTDEVICE present"
+#endif
+
+#if NRF51_ST_PRIORITY != 1
+#error "ST priority must be 1 when SOFTDEVICE present"
+#endif
+
+#endif /* defined(SOFTDEVICE_PRESENT) */
+#endif /* OSAL_ST_MODE != OSAL_ST_MODE_NONE */
+
+#if OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING
+#if defined(CH_CFG_ST_TIMEDELTA) && (CH_CFG_ST_TIMEDELTA < 5)
+#error "CH_CFG_ST_TIMEDELTA is too low"
+#endif
+#if NRF51_ST_USE_TIMER0 == TRUE
+#error "Freeruning (tick-less) mode not supported with TIMER, use RTC"
+#endif
+#endif /* OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING */
+
+#if !OSAL_IRQ_IS_VALID_PRIORITY(NRF51_ST_PRIORITY)
+#error "Invalid IRQ priority assigned to ST driver"
+#endif
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void st_lld_init(void);
+#ifdef __cplusplus
+}
+#endif
+
+/*===========================================================================*/
+/* Driver inline functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Returns the time counter value.
+ *
+ * @return The counter value.
+ *
+ * @notapi
+ */
+static inline systime_t st_lld_get_counter(void) {
+#if NRF51_ST_USE_RTC0 == TRUE
+ return (systime_t)NRF_RTC0->COUNTER;
+#endif
+#if NRF51_ST_USE_RTC1 == TRUE
+ return (systime_t)NRF_RTC1->COUNTER;
+#endif
+#if NRF51_ST_USE_TIMER0 == TRUE
+ return (systime_t)0;
+#endif
+}
+
+/**
+ * @brief Starts the alarm.
+ * @note Makes sure that no spurious alarms are triggered after
+ * this call.
+ *
+ * @param[in] abstime the time to be set for the first alarm
+ *
+ * @notapi
+ */
+static inline void st_lld_start_alarm(systime_t abstime) {
+#if NRF51_ST_USE_RTC0 == TRUE
+ NRF_RTC0->CC[0] = abstime;
+ NRF_RTC0->EVENTS_COMPARE[0] = 0;
+ NRF_RTC0->EVTENSET = RTC_EVTENSET_COMPARE0_Msk;
+#endif
+#if NRF51_ST_USE_RTC1 == TRUE
+ NRF_RTC1->CC[0] = abstime;
+ NRF_RTC1->EVENTS_COMPARE[0] = 0;
+ NRF_RTC1->EVTENSET = RTC_EVTENSET_COMPARE0_Msk;
+#endif
+#if NRF51_ST_USE_TIMER0 == TRUE
+ (void)abstime;
+#endif
+}
+
+/**
+ * @brief Stops the alarm interrupt.
+ *
+ * @notapi
+ */
+static inline void st_lld_stop_alarm(void) {
+#if NRF51_ST_USE_RTC0 == TRUE
+ NRF_RTC0->EVTENCLR = RTC_EVTENCLR_COMPARE0_Msk;
+ NRF_RTC0->EVENTS_COMPARE[0] = 0;
+#endif
+#if NRF51_ST_USE_RTC1 == TRUE
+ NRF_RTC1->EVTENCLR = RTC_EVTENCLR_COMPARE0_Msk;
+ NRF_RTC1->EVENTS_COMPARE[0] = 0;
+#endif
+}
+
+/**
+ * @brief Sets the alarm time.
+ *
+ * @param[in] abstime the time to be set for the next alarm
+ *
+ * @notapi
+ */
+static inline void st_lld_set_alarm(systime_t abstime) {
+#if NRF51_ST_USE_RTC0 == TRUE
+ NRF_RTC0->CC[0] = abstime;
+#endif
+#if NRF51_ST_USE_RTC1 == TRUE
+ NRF_RTC1->CC[0] = abstime;
+#endif
+#if NRF51_ST_USE_TIMER0 == TRUE
+ (void)abstime;
+#endif
+}
+
+/**
+ * @brief Returns the current alarm time.
+ *
+ * @return The currently set alarm time.
+ *
+ * @notapi
+ */
+static inline systime_t st_lld_get_alarm(void) {
+#if NRF51_ST_USE_RTC0 == TRUE
+ return (systime_t)NRF_RTC0->CC[0];
+#endif
+#if NRF51_ST_USE_RTC1 == TRUE
+ return (systime_t)NRF_RTC1->CC[0];
+#endif
+#if NRF51_ST_USE_TIMER0 == TRUE
+ return (systime_t)0;
+#endif
+}
+
+/**
+ * @brief Determines if the alarm is active.
+ *
+ * @return The alarm status.
+ * @retval false if the alarm is not active.
+ * @retval true is the alarm is active
+ *
+ * @notapi
+ */
+static inline bool st_lld_is_alarm_active(void) {
+#if NRF51_ST_USE_RTC0 == TRUE
+ return NRF_RTC0->EVTEN & RTC_EVTEN_COMPARE0_Msk;
+#endif
+#if NRF51_ST_USE_RTC1 == TRUE
+ return NRF_RTC1->EVTEN & RTC_EVTEN_COMPARE0_Msk;
+#endif
+#if NRF51_ST_USE_TIMER0 == TRUE
+ return false;
+#endif
+}
+
+#endif /* HAL_ST_LLD_H */
+
+/** @} */
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