From c37554ca20e450bffa0fc3201ceda5283795e3db Mon Sep 17 00:00:00 2001 From: Fabio Utzig Date: Wed, 13 May 2015 22:19:05 -0300 Subject: Add initial serial driver --- os/hal/ports/NRF51/NRF51822/platform.mk | 1 + os/hal/ports/NRF51/NRF51822/serial_lld.c | 207 +++++++++++++++++++++++++++++++ os/hal/ports/NRF51/NRF51822/serial_lld.h | 119 ++++++++++++++++++ 3 files changed, 327 insertions(+) create mode 100644 os/hal/ports/NRF51/NRF51822/serial_lld.c create mode 100644 os/hal/ports/NRF51/NRF51822/serial_lld.h (limited to 'os/hal/ports') diff --git a/os/hal/ports/NRF51/NRF51822/platform.mk b/os/hal/ports/NRF51/NRF51822/platform.mk index 4ed0722..c905684 100644 --- a/os/hal/ports/NRF51/NRF51822/platform.mk +++ b/os/hal/ports/NRF51/NRF51822/platform.mk @@ -1,6 +1,7 @@ # List of all the NRF51x platform files. PLATFORMSRC = ${CHIBIOS}/os/hal/ports/common/ARMCMx/nvic.c \ ${CHIBIOS}/community/os/hal/ports/NRF51/NRF51822/hal_lld.c \ + ${CHIBIOS}/community/os/hal/ports/NRF51/NRF51822/serial_lld.c \ ${CHIBIOS}/community/os/hal/ports/NRF51/NRF51822/st_lld.c # Required include directories diff --git a/os/hal/ports/NRF51/NRF51822/serial_lld.c b/os/hal/ports/NRF51/NRF51822/serial_lld.c new file mode 100644 index 0000000..c98405d --- /dev/null +++ b/os/hal/ports/NRF51/NRF51822/serial_lld.c @@ -0,0 +1,207 @@ +/* + 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__) + +#include "nrf51.h" + +/*===========================================================================*/ +/* 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 = { + 38400 +}; + +/*===========================================================================*/ +/* Driver local functions. */ +/*===========================================================================*/ + +/** + * @brief Driver output notification. + */ +#if NRF51_SERIAL_USE_UART0 || defined(__DOXYGEN__) +static void notify1(io_queue_t *qp) +{ + (void)qp; + + //if (NRF_UART0->EVENTS_TXDRDY) { + msg_t b = oqGetI(&SD1.oqueue); + if (b < Q_OK) { + chnAddFlagsI(&SD1, CHN_OUTPUT_EMPTY); + return; + } + NRF_UART0->TXD = b; + //NRF_UART0->INTENCLR = 0x80; // clear TX interrupt + //} +} +#endif + + +/*===========================================================================*/ +/* Driver interrupt handlers. */ +/*===========================================================================*/ + +#if NRF51_SERIAL_USE_UART0 || defined(__DOXYGEN__) +OSAL_IRQ_HANDLER(Vector48) { + + OSAL_IRQ_PROLOGUE(); + + if (NRF_UART0->EVENTS_RXDRDY) { + osalSysLockFromISR(); + if (iqIsEmptyI(&SD1.iqueue)) + chnAddFlagsI(&SD1, CHN_INPUT_AVAILABLE); + if (iqPutI(&SD1.iqueue, NRF_UART0->RXD) < Q_OK) + chnAddFlagsI(&SD1, SD_OVERRUN_ERROR); + //NRF_UART0->INTENCLR = 4; + osalSysUnlockFromISR(); + } + + if (NRF_UART0->EVENTS_TXDRDY) { + msg_t b; + + osalSysLockFromISR(); + b = oqGetI(&SD1.oqueue); + osalSysUnlockFromISR(); + + if (b < Q_OK) { + osalSysLockFromISR(); + chnAddFlagsI(&SD1, CHN_OUTPUT_EMPTY); + osalSysUnlockFromISR(); + NRF_UART0->INTENCLR = 0x80; // clear TX interrupt + } else { + NRF_UART0->TXD = b; + } + } + + 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; + } + + if (sdp->state == SD_STOP) { + +#if NRF51_SERIAL_USE_UART0 == TRUE + if (sdp == &SD1) { + /* FIXME: some board specific, some hardcodeds! */ + + /* Configure PINs */ + NRF_UART0->PSELRTS = ~0; + NRF_UART0->PSELCTS = ~0; + + NRF_GPIO->PIN_CNF[9] = 1; + NRF_UART0->PSELTXD = 9; + NRF_UART0->PSELRXD = 11; + + /* 38400!!! */ + NRF_UART0->BAUDRATE = 0x009D5000; + + /* Enable interrupts for RX, TX and ERROR */ + NRF_UART0->INTENSET = 0x284; + + nvicEnableVector(UART0_IRQn, 12); + + NRF_UART0->ENABLE = 4; + NRF_UART0->TASKS_STARTRX = 1; + NRF_UART0->TASKS_STARTTX = 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); + } +#endif + + } +} + +#endif /* HAL_USE_SERIAL == TRUE */ + +/** @} */ diff --git a/os/hal/ports/NRF51/NRF51822/serial_lld.h b/os/hal/ports/NRF51/NRF51822/serial_lld.h new file mode 100644 index 0000000..ae8e46e --- /dev/null +++ b/os/hal/ports/NRF51/NRF51822/serial_lld.h @@ -0,0 +1,119 @@ +/* + 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 _SERIAL_LLD_H_ +#define _SERIAL_LLD_H_ + +#if (HAL_USE_SERIAL == TRUE) || defined(__DOXYGEN__) + +/*===========================================================================*/ +/* Driver constants. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver pre-compile time settings. */ +/*===========================================================================*/ + +/** + * @name PLATFORM configuration options + * @{ + */ +/** + * @brief USART1 driver enable switch. + * @details If set to @p TRUE the support for USART1 is included. + * @note The default is @p FALSE. + */ +#if !defined(NRF51_SERIAL_USE_UART0) || defined(__DOXYGEN__) +#define NRF51_SERIAL_USE_UART0 FALSE +#endif +/** @} */ + +/*===========================================================================*/ +/* Derived constants and error checks. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* 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.*/ +} 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]; \ + /* End of the mandatory fields.*/ + +/*===========================================================================*/ +/* 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 /* _SERIAL_LLD_H_ */ + +/** @} */ -- cgit v1.2.3