diff options
Diffstat (limited to 'os/hal/platforms/STM32/serial_lld.c')
| -rw-r--r-- | os/hal/platforms/STM32/serial_lld.c | 305 |
1 files changed, 0 insertions, 305 deletions
diff --git a/os/hal/platforms/STM32/serial_lld.c b/os/hal/platforms/STM32/serial_lld.c deleted file mode 100644 index 5337c4dfa..000000000 --- a/os/hal/platforms/STM32/serial_lld.c +++ /dev/null @@ -1,305 +0,0 @@ -/*
- ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
-
- This file is part of ChibiOS/RT.
-
- ChibiOS/RT is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- ChibiOS/RT is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-/**
- * @file STM32/serial_lld.c
- * @brief STM32 low level serial driver code
- * @addtogroup STM32_SERIAL
- * @{
- */
-
-#include "ch.h"
-#include "hal.h"
-
-#if CH_HAL_USE_SERIAL
-
-#if USE_STM32_USART1 || defined(__DOXYGEN__)
-/** @brief USART1 serial driver identifier.*/
-SerialDriver SD1;
-#endif
-
-#if USE_STM32_USART2 || defined(__DOXYGEN__)
-/** @brief USART2 serial driver identifier.*/
-SerialDriver SD2;
-#endif
-
-#if USE_STM32_USART3 || defined(__DOXYGEN__)
-/** @brief USART3 serial driver identifier.*/
-SerialDriver SD3;
-#endif
-
-/** @brief Driver default configuration.*/
-static const SerialDriverConfig default_config =
-{
- 38400,
- 0,
- USART_CR2_STOP1_BITS | USART_CR2_LINEN,
- 0
-};
-
-/*===========================================================================*/
-/* Low Level Driver local functions. */
-/*===========================================================================*/
-
-/**
- * @brief USART initialization.
- * @details This function must be invoked with interrupts disabled.
- *
- * @param[in] u pointer to an USART I/O block
- * @param[in] config the architecture-dependent serial driver configuration
- */
-static void usart_init(USART_TypeDef *u, const SerialDriverConfig *config) {
-
- /*
- * Baud rate setting.
- */
- if (u == USART1)
- u->BRR = APB2CLK / config->speed;
- else
- u->BRR = APB1CLK / config->speed;
-
- /*
- * Note that some bits are enforced.
- */
- u->CR1 = config->cr1 | USART_CR1_UE | USART_CR1_PEIE | USART_CR1_RXNEIE |
- USART_CR1_TE | USART_CR1_RE;
- u->CR2 = config->cr2;
- u->CR3 = config->cr3 | USART_CR3_EIE;
-}
-
-/**
- * @brief USART de-initialization.
- * @details This function must be invoked with interrupts disabled.
- *
- * @param[in] u pointer to an USART I/O block
- */
-static void usart_deinit(USART_TypeDef *u) {
-
- u->CR1 = 0;
- u->CR2 = 0;
- u->CR3 = 0;
-}
-
-/**
- * @brief Error handling routine.
- * @param[in] sr USART SR register value
- * @param[in] com communication channel associated to the USART
- */
-static void set_error(uint16_t sr, SerialDriver *sdp) {
- sdflags_t sts = 0;
-
- if (sr & USART_SR_ORE)
- sts |= SD_OVERRUN_ERROR;
- if (sr & USART_SR_PE)
- sts |= SD_PARITY_ERROR;
- if (sr & USART_SR_FE)
- sts |= SD_FRAMING_ERROR;
- if (sr & USART_SR_LBD)
- sts |= SD_BREAK_DETECTED;
- chSysLockFromIsr();
- sdAddFlagsI(sdp, sts);
- chSysUnlockFromIsr();
-}
-
-/**
- * @brief Common IRQ handler.
- * @param[in] u pointer to an USART I/O block
- * @param[in] com communication channel associated to the USART
- */
-static void serve_interrupt(USART_TypeDef *u, SerialDriver *sdp) {
- uint16_t sr = u->SR;
-
- if (sr & (USART_SR_ORE | USART_SR_FE | USART_SR_PE | USART_SR_LBD))
- set_error(sr, sdp);
- if (sr & USART_SR_RXNE) {
- chSysLockFromIsr();
- sdIncomingDataI(sdp, u->DR);
- chSysUnlockFromIsr();
- }
- if (sr & USART_SR_TXE) {
- chSysLockFromIsr();
- msg_t b = sdRequestDataI(sdp);
- chSysUnlockFromIsr();
- if (b < Q_OK)
- u->CR1 &= ~USART_CR1_TXEIE;
- else
- u->DR = b;
- }
-}
-
-#if USE_STM32_USART1 || defined(__DOXYGEN__)
-static void notify1(void) {
-
- USART1->CR1 |= USART_CR1_TXEIE;
-}
-#endif
-
-#if USE_STM32_USART2 || defined(__DOXYGEN__)
-static void notify2(void) {
-
- USART2->CR1 |= USART_CR1_TXEIE;
-}
-#endif
-
-#if USE_STM32_USART3 || defined(__DOXYGEN__)
-static void notify3(void) {
-
- USART3->CR1 |= USART_CR1_TXEIE;
-}
-#endif
-
-/*===========================================================================*/
-/* Low Level Driver interrupt handlers. */
-/*===========================================================================*/
-
-#if USE_STM32_USART1 || defined(__DOXYGEN__)
-CH_IRQ_HANDLER(VectorD4) {
-
- CH_IRQ_PROLOGUE();
-
- serve_interrupt(USART1, &SD1);
-
- CH_IRQ_EPILOGUE();
-}
-#endif
-
-#if USE_STM32_USART2 || defined(__DOXYGEN__)
-CH_IRQ_HANDLER(VectorD8) {
-
- CH_IRQ_PROLOGUE();
-
- serve_interrupt(USART2, &SD2);
-
- CH_IRQ_EPILOGUE();
-}
-#endif
-
-#if USE_STM32_USART3 || defined(__DOXYGEN__)
-CH_IRQ_HANDLER(VectorDC) {
-
- CH_IRQ_PROLOGUE();
-
- serve_interrupt(USART3, &SD3);
-
- CH_IRQ_EPILOGUE();
-}
-#endif
-
-/*===========================================================================*/
-/* Low Level Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * Low level serial driver initialization. - */
-void sd_lld_init(void) {
-
-#if USE_STM32_USART1
- sdObjectInit(&SD1, NULL, notify1);
- GPIOA->CRH = (GPIOA->CRH & 0xFFFFF00F) | 0x000004B0;
-#endif
-
-#if USE_STM32_USART2
- sdObjectInit(&SD2, NULL, notify2);
- GPIOA->CRL = (GPIOA->CRL & 0xFFFF00FF) | 0x00004B00;
-#endif
-
-#if USE_STM32_USART3
- sdObjectInit(&SD3, NULL, notify3);
- GPIOB->CRH = (GPIOB->CRH & 0xFFFF00FF) | 0x00004B00;
-#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.
- */
-void sd_lld_start(SerialDriver *sdp, const SerialDriverConfig *config) {
-
- if (config == NULL)
- config = &default_config;
-
-#if USE_STM32_USART1
- if (&SD1 == sdp) {
- RCC->APB2ENR |= RCC_APB2ENR_USART1EN;
- usart_init(USART1, config);
- NVICEnableVector(USART1_IRQn, STM32_USART1_PRIORITY);
- return;
- }
-#endif
-#if USE_STM32_USART2
- if (&SD2 == sdp) {
- RCC->APB1ENR |= RCC_APB1ENR_USART2EN;
- usart_init(USART2, config);
- NVICEnableVector(USART2_IRQn, STM32_USART2_PRIORITY);
- return;
- }
-#endif
-#if USE_STM32_USART3
- if (&SD3 == sdp) {
- RCC->APB1ENR |= RCC_APB1ENR_USART3EN;
- usart_init(USART3, config);
- NVICEnableVector(USART3_IRQn, STM32_USART3_PRIORITY);
- return;
- }
-#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
- */
-void sd_lld_stop(SerialDriver *sdp) {
-
-#if USE_STM32_USART1
- if (&SD1 == sdp) {
- usart_deinit(USART1);
- RCC->APB2ENR &= ~RCC_APB2ENR_USART1EN;
- NVICDisableVector(USART1_IRQn);
- return;
- }
-#endif
-#if USE_STM32_USART2
- if (&SD2 == sdp) {
- usart_deinit(USART2);
- RCC->APB1ENR &= ~RCC_APB1ENR_USART2EN;
- NVICDisableVector(USART2_IRQn);
- return;
- }
-#endif
-#if USE_STM32_USART3
- if (&SD3 == sdp) {
- usart_deinit(USART3);
- RCC->APB1ENR &= ~RCC_APB1ENR_USART3EN;
- NVICDisableVector(USART3_IRQn);
- return;
- }
-#endif
-}
-
-#endif /* CH_HAL_USE_SERIAL */
-
-/** @} */
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