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author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2013-08-09 08:25:09 +0000 |
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committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2013-08-09 08:25:09 +0000 |
commit | 0e34cd051ed686263001af3a721f6858db94d072 (patch) | |
tree | 499c397f624dff297b4a5cf11e783f30cc6ae4b3 /os/hal/platforms/STM32/USARTv2/serial_lld.c | |
parent | 8ca210a4af9fd039e290cfcc309adde543999c1f (diff) | |
download | ChibiOS-0e34cd051ed686263001af3a721f6858db94d072.tar.gz ChibiOS-0e34cd051ed686263001af3a721f6858db94d072.tar.bz2 ChibiOS-0e34cd051ed686263001af3a721f6858db94d072.zip |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/kernel_3_dev@6109 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/platforms/STM32/USARTv2/serial_lld.c')
-rw-r--r-- | os/hal/platforms/STM32/USARTv2/serial_lld.c | 522 |
1 files changed, 522 insertions, 0 deletions
diff --git a/os/hal/platforms/STM32/USARTv2/serial_lld.c b/os/hal/platforms/STM32/USARTv2/serial_lld.c new file mode 100644 index 000000000..9e640c86e --- /dev/null +++ b/os/hal/platforms/STM32/USARTv2/serial_lld.c @@ -0,0 +1,522 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+
+ 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 STM32/USARTv2/serial_lld.c
+ * @brief STM32 low level serial driver code.
+ *
+ * @addtogroup SERIAL
+ * @{
+ */
+
+#include "hal.h"
+
+#if HAL_USE_SERIAL || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/** @brief USART1 serial driver identifier.*/
+#if STM32_SERIAL_USE_USART1 || defined(__DOXYGEN__)
+SerialDriver SD1;
+#endif
+
+/** @brief USART2 serial driver identifier.*/
+#if STM32_SERIAL_USE_USART2 || defined(__DOXYGEN__)
+SerialDriver SD2;
+#endif
+
+/** @brief USART3 serial driver identifier.*/
+#if STM32_SERIAL_USE_USART3 || defined(__DOXYGEN__)
+SerialDriver SD3;
+#endif
+
+/** @brief UART4 serial driver identifier.*/
+#if STM32_SERIAL_USE_UART4 || defined(__DOXYGEN__)
+SerialDriver SD4;
+#endif
+
+/** @brief UART5 serial driver identifier.*/
+#if STM32_SERIAL_USE_UART5 || defined(__DOXYGEN__)
+SerialDriver SD5;
+#endif
+
+/** @brief USART6 serial driver identifier.*/
+#if STM32_SERIAL_USE_USART6 || defined(__DOXYGEN__)
+SerialDriver SD6;
+#endif
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/** @brief Driver default configuration.*/
+static const SerialConfig default_config =
+{
+ SERIAL_DEFAULT_BITRATE,
+ 0,
+ USART_CR2_STOP1_BITS | USART_CR2_LINEN,
+ 0
+};
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/**
+ * @brief USART initialization.
+ * @details This function must be invoked with interrupts disabled.
+ *
+ * @param[in] sdp pointer to a @p SerialDriver object
+ * @param[in] config the architecture-dependent serial driver configuration
+ */
+static void usart_init(SerialDriver *sdp, const SerialConfig *config) {
+ USART_TypeDef *u = sdp->usart;
+
+ /* Baud rate setting.*/
+ u->BRR = (uint16_t)(sdp->clock / config->speed);
+
+ /* Note that some bits are enforced.*/
+ u->CR2 = config->cr2 | USART_CR2_LBDIE;
+ u->CR3 = config->cr3 | USART_CR3_EIE;
+ u->CR1 = config->cr1 | USART_CR1_UE | USART_CR1_PEIE |
+ USART_CR1_RXNEIE | USART_CR1_TE |
+ USART_CR1_RE;
+ u->ICR = 0xFFFFFFFF;
+}
+
+/**
+ * @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] sdp pointer to a @p SerialDriver object
+ * @param[in] isr USART ISR register value
+ */
+static void set_error(SerialDriver *sdp, uint32_t isr) {
+ eventflags_t sts = 0;
+
+ if (isr & USART_ISR_ORE)
+ sts |= SD_OVERRUN_ERROR;
+ if (isr & USART_ISR_PE)
+ sts |= SD_PARITY_ERROR;
+ if (isr & USART_ISR_FE)
+ sts |= SD_FRAMING_ERROR;
+ if (isr & USART_ISR_NE)
+ sts |= SD_NOISE_ERROR;
+ osalSysLockFromISR();
+ chnAddFlagsI(sdp, sts);
+ osalSysUnlockFromISR();
+}
+
+/**
+ * @brief Common IRQ handler.
+ *
+ * @param[in] sdp communication channel associated to the USART
+ */
+static void serve_interrupt(SerialDriver *sdp) {
+ USART_TypeDef *u = sdp->usart;
+ uint32_t cr1 = u->CR1;
+ uint32_t isr;
+
+ /* Reading and clearing status.*/
+ isr = u->ISR;
+ u->ICR = isr;
+
+ /* Error condition detection.*/
+ if (isr & (USART_ISR_ORE | USART_ISR_NE | USART_ISR_FE | USART_ISR_PE))
+ set_error(sdp, isr);
+ /* Special case, LIN break detection.*/
+ if (isr & USART_ISR_LBD) {
+ osalSysLockFromISR();
+ chnAddFlagsI(sdp, SD_BREAK_DETECTED);
+ osalSysUnlockFromISR();
+ }
+ /* Data available.*/
+ if (isr & USART_ISR_RXNE) {
+ osalSysLockFromISR();
+ sdIncomingDataI(sdp, (uint8_t)u->RDR);
+ osalSysUnlockFromISR();
+ }
+ /* Transmission buffer empty.*/
+ if ((cr1 & USART_CR1_TXEIE) && (isr & USART_ISR_TXE)) {
+ msg_t b;
+ osalSysLockFromISR();
+ b = oqGetI(&sdp->oqueue);
+ if (b < Q_OK) {
+ chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY);
+ u->CR1 = (cr1 & ~USART_CR1_TXEIE) | USART_CR1_TCIE;
+ }
+ else
+ u->TDR = b;
+ osalSysUnlockFromISR();
+ }
+ /* Physical transmission end.*/
+ if (isr & USART_ISR_TC) {
+ osalSysLockFromISR();
+ chnAddFlagsI(sdp, CHN_TRANSMISSION_END);
+ osalSysUnlockFromISR();
+ u->CR1 = cr1 & ~USART_CR1_TCIE;
+ }
+}
+
+#if STM32_SERIAL_USE_USART1 || defined(__DOXYGEN__)
+static void notify1(GenericQueue *qp) {
+
+ (void)qp;
+ USART1->CR1 |= USART_CR1_TXEIE;
+}
+#endif
+
+#if STM32_SERIAL_USE_USART2 || defined(__DOXYGEN__)
+static void notify2(GenericQueue *qp) {
+
+ (void)qp;
+ USART2->CR1 |= USART_CR1_TXEIE;
+}
+#endif
+
+#if STM32_SERIAL_USE_USART3 || defined(__DOXYGEN__)
+static void notify3(GenericQueue *qp) {
+
+ (void)qp;
+ USART3->CR1 |= USART_CR1_TXEIE;
+}
+#endif
+
+#if STM32_SERIAL_USE_UART4 || defined(__DOXYGEN__)
+static void notify4(GenericQueue *qp) {
+
+ (void)qp;
+ UART4->CR1 |= USART_CR1_TXEIE;
+}
+#endif
+
+#if STM32_SERIAL_USE_UART5 || defined(__DOXYGEN__)
+static void notify5(GenericQueue *qp) {
+
+ (void)qp;
+ UART5->CR1 |= USART_CR1_TXEIE;
+}
+#endif
+
+#if STM32_SERIAL_USE_USART6 || defined(__DOXYGEN__)
+static void notify6(GenericQueue *qp) {
+
+ (void)qp;
+ USART6->CR1 |= USART_CR1_TXEIE;
+}
+#endif
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+#if STM32_SERIAL_USE_USART1 || defined(__DOXYGEN__)
+#if !defined(STM32_USART1_HANDLER)
+#error "STM32_USART1_HANDLER not defined"
+#endif
+/**
+ * @brief USART1 interrupt handler.
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(STM32_USART1_HANDLER) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ serve_interrupt(&SD1);
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+
+#if STM32_SERIAL_USE_USART2 || defined(__DOXYGEN__)
+#if !defined(STM32_USART2_HANDLER)
+#error "STM32_USART2_HANDLER not defined"
+#endif
+/**
+ * @brief USART2 interrupt handler.
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(STM32_USART2_HANDLER) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ serve_interrupt(&SD2);
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+
+#if STM32_SERIAL_USE_USART3 || defined(__DOXYGEN__)
+#if !defined(STM32_USART3_HANDLER)
+#error "STM32_USART3_HANDLER not defined"
+#endif
+/**
+ * @brief USART3 interrupt handler.
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(STM32_USART3_HANDLER) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ serve_interrupt(&SD3);
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+
+#if STM32_SERIAL_USE_UART4 || defined(__DOXYGEN__)
+#if !defined(STM32_UART4_HANDLER)
+#error "STM32_UART4_HANDLER not defined"
+#endif
+/**
+ * @brief UART4 interrupt handler.
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(STM32_UART4_HANDLER) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ serve_interrupt(&SD4);
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+
+#if STM32_SERIAL_USE_UART5 || defined(__DOXYGEN__)
+#if !defined(STM32_UART5_HANDLER)
+#error "STM32_UART5_HANDLER not defined"
+#endif
+/**
+ * @brief UART5 interrupt handler.
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(STM32_UART5_HANDLER) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ serve_interrupt(&SD5);
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+
+#if STM32_SERIAL_USE_USART6 || defined(__DOXYGEN__)
+#if !defined(STM32_USART6_HANDLER)
+#error "STM32_USART6_HANDLER not defined"
+#endif
+/**
+ * @brief USART1 interrupt handler.
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(STM32_USART6_HANDLER) {
+
+ OSAL_IRQ_PROLOGUE();
+
+ serve_interrupt(&SD6);
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level serial driver initialization.
+ *
+ * @notapi
+ */
+void sd_lld_init(void) {
+
+#if STM32_SERIAL_USE_USART1
+ sdObjectInit(&SD1, NULL, notify1);
+ SD1.usart = USART1;
+ SD1.clock = STM32_USART1CLK;
+#endif
+
+#if STM32_SERIAL_USE_USART2
+ sdObjectInit(&SD2, NULL, notify2);
+ SD2.usart = USART2;
+ SD2.clock = STM32_USART2CLK;
+#endif
+
+#if STM32_SERIAL_USE_USART3
+ sdObjectInit(&SD3, NULL, notify3);
+ SD3.usart = USART3;
+ SD3.clock = STM32_USART3CLK;
+#endif
+
+#if STM32_SERIAL_USE_UART4
+ sdObjectInit(&SD4, NULL, notify4);
+ SD4.usart = UART4;
+ SD4.clock = STM32_UART4CLK;
+#endif
+
+#if STM32_SERIAL_USE_UART5
+ sdObjectInit(&SD5, NULL, notify5);
+ SD5.usart = UART5;
+ SD5.clock = STM32_UART5CLK;
+#endif
+
+#if STM32_SERIAL_USE_USART6
+ sdObjectInit(&SD6, NULL, notify6);
+ SD6.usart = USART6;
+ SD6.clock = STM32_USART6CLK;
+#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 STM32_SERIAL_USE_USART1
+ if (&SD1 == sdp) {
+ rccEnableUSART1(FALSE);
+ nvicEnableVector(STM32_USART1_NUMBER, STM32_SERIAL_USART1_PRIORITY);
+ }
+#endif
+#if STM32_SERIAL_USE_USART2
+ if (&SD2 == sdp) {
+ rccEnableUSART2(FALSE);
+ nvicEnableVector(STM32_USART2_NUMBER, STM32_SERIAL_USART2_PRIORITY);
+ }
+#endif
+#if STM32_SERIAL_USE_USART3
+ if (&SD3 == sdp) {
+ rccEnableUSART3(FALSE);
+ nvicEnableVector(STM32_USART3_NUMBER, STM32_SERIAL_USART3_PRIORITY);
+ }
+#endif
+#if STM32_SERIAL_USE_UART4
+ if (&SD4 == sdp) {
+ rccEnableUART4(FALSE);
+ nvicEnableVector(STM32_UART4_NUMBER, STM32_SERIAL_UART4_PRIORITY);
+ }
+#endif
+#if STM32_SERIAL_USE_UART5
+ if (&SD5 == sdp) {
+ rccEnableUART5(FALSE);
+ nvicEnableVector(STM32_UART5_NUMBER, STM32_SERIAL_UART5_PRIORITY);
+ }
+#endif
+#if STM32_SERIAL_USE_USART6
+ if (&SD6 == sdp) {
+ rccEnableUSART6(FALSE);
+ nvicEnableVector(STM32_USART6_NUMBER, STM32_SERIAL_USART6_PRIORITY);
+ }
+#endif
+ }
+ usart_init(sdp, config);
+}
+
+/**
+ * @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) {
+ usart_deinit(sdp->usart);
+#if STM32_SERIAL_USE_USART1
+ if (&SD1 == sdp) {
+ rccDisableUSART1(FALSE);
+ nvicDisableVector(STM32_USART1_NUMBER);
+ return;
+ }
+#endif
+#if STM32_SERIAL_USE_USART2
+ if (&SD2 == sdp) {
+ rccDisableUSART2(FALSE);
+ nvicDisableVector(STM32_USART2_NUMBER);
+ return;
+ }
+#endif
+#if STM32_SERIAL_USE_USART3
+ if (&SD3 == sdp) {
+ rccDisableUSART3(FALSE);
+ nvicDisableVector(STM32_USART3_NUMBER);
+ return;
+ }
+#endif
+#if STM32_SERIAL_USE_UART4
+ if (&SD4 == sdp) {
+ rccDisableUART4(FALSE);
+ nvicDisableVector(STM32_UART4_NUMBER);
+ return;
+ }
+#endif
+#if STM32_SERIAL_USE_UART5
+ if (&SD5 == sdp) {
+ rccDisableUART5(FALSE);
+ nvicDisableVector(STM32_UART5_NUMBER);
+ return;
+ }
+#endif
+#if STM32_SERIAL_USE_USART6
+ if (&SD6 == sdp) {
+ rccDisableUSART6(FALSE);
+ nvicDisableVector(STM32_USART6_NUMBER);
+ return;
+ }
+#endif
+ }
+}
+
+#endif /* HAL_USE_SERIAL */
+
+/** @} */
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