git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@4214 35acf78f-673a-0410-8e92-d51de3d6d3f4
gdisirio
parent
60ed87c841
commit
ba01b11a39
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@ -129,7 +129,7 @@
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* @brief Enables the SERIAL subsystem.
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*/
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#if !defined(HAL_USE_SERIAL) || defined(__DOXYGEN__)
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#define HAL_USE_SERIAL FALSE
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#define HAL_USE_SERIAL TRUE
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#endif
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/**
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@ -69,6 +69,14 @@ int main(void) {
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halInit();
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chSysInit();
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/*
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* Activates the serial driver 1 using the driver default configuration.
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* PA9 and PA10 are routed to USART1.
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*/
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sdStart(&SD1, NULL);
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palSetPadMode(GPIOA, 9, PAL_MODE_ALTERNATE(1)); /* USART1 TX. */
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palSetPadMode(GPIOA, 10, PAL_MODE_ALTERNATE(1)); /* USART1 RX. */
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/*
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* Creates the blinker threads.
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*/
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@ -82,8 +90,8 @@ int main(void) {
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* driver 1.
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*/
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while (TRUE) {
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/*if (palReadPad(GPIOA, GPIOA_BUTTON))
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TestThread(&SD1);*/
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if (palReadPad(GPIOA, GPIOA_BUTTON))
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TestThread(&SD1);
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chThdSleepMilliseconds(500);
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}
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}
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@ -58,3 +58,11 @@
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#define STM32_I2C1SW STM32_I2C1SW_HSI
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#define STM32_USART1SW STM32_USART1SW_PCLK
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#define STM32_RTCSEL STM32_RTCSEL_LSI
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/*
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* SERIAL driver system settings.
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*/
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#define STM32_SERIAL_USE_USART1 TRUE
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#define STM32_SERIAL_USE_USART2 FALSE
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#define STM32_SERIAL_USART1_PRIORITY 3
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#define STM32_SERIAL_USART2_PRIORITY 3
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@ -1,5 +1,6 @@
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# List of all the STM32F1xx platform files.
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PLATFORMSRC = ${CHIBIOS}/os/hal/platforms/STM32F0xx/hal_lld.c \
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${CHIBIOS}/os/hal/platforms/STM32F0xx/serial_lld.c \
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${CHIBIOS}/os/hal/platforms/STM32/GPIOv2/pal_lld.c
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# Required include directories
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@ -0,0 +1,322 @@
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/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file STM32/serial_lld.c
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* @brief STM32 low level serial driver code.
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*
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* @addtogroup SERIAL
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* @{
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*/
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#include "ch.h"
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#include "hal.h"
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#if HAL_USE_SERIAL || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/** @brief USART1 serial driver identifier.*/
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#if STM32_SERIAL_USE_USART1 || defined(__DOXYGEN__)
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SerialDriver SD1;
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#endif
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/** @brief USART2 serial driver identifier.*/
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#if STM32_SERIAL_USE_USART2 || defined(__DOXYGEN__)
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SerialDriver SD2;
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#endif
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/*===========================================================================*/
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/* Driver local variables. */
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/*===========================================================================*/
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/** @brief Driver default configuration.*/
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static const SerialConfig default_config =
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{
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SERIAL_DEFAULT_BITRATE,
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0,
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USART_CR2_STOP1_BITS | USART_CR2_LINEN,
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0
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};
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/**
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* @brief USART initialization.
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* @details This function must be invoked with interrupts disabled.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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* @param[in] config the architecture-dependent serial driver configuration
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*/
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static void usart_init(SerialDriver *sdp, const SerialConfig *config) {
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USART_TypeDef *u = sdp->usart;
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/*
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* Baud rate setting.
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*/
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if (sdp->usart == USART1)
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u->BRR = STM32_USART1CLK / config->sc_speed;
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else
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u->BRR = STM32_PCLK / config->sc_speed;
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/*
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* Note that some bits are enforced.
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*/
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u->CR1 = config->sc_cr1 | USART_CR1_UE | USART_CR1_PEIE |
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USART_CR1_RXNEIE | USART_CR1_TE |
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USART_CR1_RE;
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u->CR2 = config->sc_cr2 | USART_CR2_LBDIE;
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u->CR3 = config->sc_cr3 | USART_CR3_EIE;
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u->ICR = 0xFFFFFFFF;
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}
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/**
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* @brief USART de-initialization.
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* @details This function must be invoked with interrupts disabled.
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*
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* @param[in] u pointer to an USART I/O block
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*/
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static void usart_deinit(USART_TypeDef *u) {
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u->CR1 = 0;
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u->CR2 = 0;
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u->CR3 = 0;
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}
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#if STM32_SERIAL_USE_USART1 || STM32_SERIAL_USE_USART2
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/**
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* @brief Error handling routine.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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* @param[in] isr USART ISR register value
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*/
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static void set_error(SerialDriver *sdp, uint16_t isr) {
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chnflags_t sts = 0;
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if (isr & USART_ISR_ORE)
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sts |= SD_OVERRUN_ERROR;
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if (isr & USART_ISR_PE)
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sts |= SD_PARITY_ERROR;
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if (isr & USART_ISR_FE)
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sts |= SD_FRAMING_ERROR;
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if (isr & USART_ISR_NE)
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sts |= SD_NOISE_ERROR;
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chSysLockFromIsr();
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chnAddFlagsI(sdp, sts);
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chSysUnlockFromIsr();
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}
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/**
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* @brief Common IRQ handler.
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*
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* @param[in] sdp communication channel associated to the USART
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*/
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static void serve_interrupt(SerialDriver *sdp) {
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USART_TypeDef *u = sdp->usart;
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uint16_t cr1 = u->CR1;
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uint16_t isr;
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/* Reading and clearing status.*/
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isr = u->ISR;
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u->ICR = isr;
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/* Error condition detection.*/
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if (isr & (USART_ISR_ORE | USART_ISR_NE | USART_ISR_FE | USART_ISR_PE))
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set_error(sdp, isr);
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/* Special case, LIN break detection.*/
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if (isr & USART_ISR_LBD) {
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chSysLockFromIsr();
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chnAddFlagsI(sdp, SD_BREAK_DETECTED);
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chSysUnlockFromIsr();
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}
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/* Data available.*/
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if (isr & USART_ISR_RXNE) {
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chSysLockFromIsr();
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sdIncomingDataI(sdp, (uint8_t)u->RDR);
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chSysUnlockFromIsr();
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}
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/* Transmission buffer empty.*/
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if ((cr1 & USART_CR1_TXEIE) && (isr & USART_ISR_TXE)) {
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msg_t b;
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chSysLockFromIsr();
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b = chOQGetI(&sdp->oqueue);
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if (b < Q_OK) {
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chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY);
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u->CR1 = (cr1 & ~USART_CR1_TXEIE) | USART_CR1_TCIE;
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}
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else
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u->RDR = b;
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chSysUnlockFromIsr();
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}
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/* Physical transmission end.*/
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if (isr & USART_ISR_TC) {
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chSysLockFromIsr();
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chnAddFlagsI(sdp, CHN_TRANSMISSION_END);
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chSysUnlockFromIsr();
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u->CR1 = cr1 & ~USART_CR1_TCIE;
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}
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}
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#endif
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#if STM32_SERIAL_USE_USART1 || defined(__DOXYGEN__)
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static void notify1(GenericQueue *qp) {
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(void)qp;
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USART1->CR1 |= USART_CR1_TXEIE;
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}
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#endif
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#if STM32_SERIAL_USE_USART2 || defined(__DOXYGEN__)
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static void notify2(GenericQueue *qp) {
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(void)qp;
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USART2->CR1 |= USART_CR1_TXEIE;
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}
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#endif
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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#if STM32_SERIAL_USE_USART1 || defined(__DOXYGEN__)
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/**
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* @brief USART1 interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(USART1_IRQHandler) {
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CH_IRQ_PROLOGUE();
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serve_interrupt(&SD1);
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CH_IRQ_EPILOGUE();
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}
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#endif
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#if STM32_SERIAL_USE_USART2 || defined(__DOXYGEN__)
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/**
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* @brief USART2 interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(USART2_IRQHandler) {
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CH_IRQ_PROLOGUE();
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serve_interrupt(&SD2);
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CH_IRQ_EPILOGUE();
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}
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#endif
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Low level serial driver initialization.
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*
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* @notapi
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*/
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void sd_lld_init(void) {
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#if STM32_SERIAL_USE_USART1
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sdObjectInit(&SD1, NULL, notify1);
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SD1.usart = USART1;
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#endif
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#if STM32_SERIAL_USE_USART2
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sdObjectInit(&SD2, NULL, notify2);
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SD2.usart = USART2;
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#endif
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}
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/**
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* @brief Low level serial driver configuration and (re)start.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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* @param[in] config the architecture-dependent serial driver configuration.
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* If this parameter is set to @p NULL then a default
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* configuration is used.
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*
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* @notapi
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*/
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void sd_lld_start(SerialDriver *sdp, const SerialConfig *config) {
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if (config == NULL)
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config = &default_config;
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if (sdp->state == SD_STOP) {
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#if STM32_SERIAL_USE_USART1
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if (&SD1 == sdp) {
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rccEnableUSART1(FALSE);
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nvicEnableVector(USART1_IRQn,
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CORTEX_PRIORITY_MASK(STM32_SERIAL_USART1_PRIORITY));
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}
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#endif
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#if STM32_SERIAL_USE_USART2
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if (&SD2 == sdp) {
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rccEnableUSART2(FALSE);
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nvicEnableVector(USART2_IRQn,
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CORTEX_PRIORITY_MASK(STM32_SERIAL_USART2_PRIORITY));
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}
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#endif
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}
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usart_init(sdp, config);
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}
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/**
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* @brief Low level serial driver stop.
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* @details De-initializes the USART, stops the associated clock, resets the
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* interrupt vector.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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*
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* @notapi
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*/
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void sd_lld_stop(SerialDriver *sdp) {
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if (sdp->state == SD_READY) {
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usart_deinit(sdp->usart);
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#if STM32_SERIAL_USE_USART1
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if (&SD1 == sdp) {
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rccDisableUSART1(FALSE);
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nvicDisableVector(USART1_IRQn);
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return;
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}
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#endif
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#if STM32_SERIAL_USE_USART2
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if (&SD2 == sdp) {
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rccDisableUSART2(FALSE);
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nvicDisableVector(USART2_IRQn);
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return;
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}
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#endif
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}
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}
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#endif /* HAL_USE_SERIAL */
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/** @} */
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@ -0,0 +1,182 @@
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/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012 Giovanni Di Sirio.
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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/>.
|
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*/
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/**
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* @file STM32/serial_lld.h
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* @brief STM32 low level serial driver header.
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*
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* @addtogroup SERIAL
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* @{
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*/
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#ifndef _SERIAL_LLD_H_
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#define _SERIAL_LLD_H_
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#if HAL_USE_SERIAL || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/**
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* @name Configuration options
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* @{
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*/
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/**
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* @brief USART1 driver enable switch.
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* @details If set to @p TRUE the support for USART1 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(STM32_SERIAL_USE_USART1) || defined(__DOXYGEN__)
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#define STM32_SERIAL_USE_USART1 TRUE
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#endif
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/**
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* @brief USART2 driver enable switch.
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* @details If set to @p TRUE the support for USART2 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(STM32_SERIAL_USE_USART2) || defined(__DOXYGEN__)
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#define STM32_SERIAL_USE_USART2 TRUE
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#endif
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/**
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* @brief USART1 interrupt priority level setting.
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*/
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#if !defined(STM32_SERIAL_USART1_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_SERIAL_USART1_PRIORITY 3
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#endif
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/**
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* @brief USART2 interrupt priority level setting.
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*/
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#if !defined(STM32_SERIAL_USART2_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_SERIAL_USART2_PRIORITY 3
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#endif
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/** @} */
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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#if STM32_SERIAL_USE_USART1 && !STM32_HAS_USART1
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#error "USART1 not present in the selected device"
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#endif
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#if STM32_SERIAL_USE_USART2 && !STM32_HAS_USART2
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#error "USART2 not present in the selected device"
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#endif
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#if !STM32_SERIAL_USE_USART1 && !STM32_SERIAL_USE_USART2
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#error "SERIAL driver activated but no USART/UART peripheral assigned"
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#endif
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/**
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* @brief STM32 Serial Driver configuration structure.
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* @details An instance of this structure must be passed to @p sdStart()
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* in order to configure and start a serial driver operations.
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* @note This structure content is architecture dependent, each driver
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* implementation defines its own version and the custom static
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* initializers.
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*/
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typedef struct {
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/**
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* @brief Bit rate.
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*/
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uint32_t sc_speed;
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/**
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* @brief Initialization value for the CR1 register.
|
||||
*/
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uint16_t sc_cr1;
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/**
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* @brief Initialization value for the CR2 register.
|
||||
*/
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uint16_t sc_cr2;
|
||||
/**
|
||||
* @brief Initialization value for the CR3 register.
|
||||
*/
|
||||
uint16_t sc_cr3;
|
||||
} SerialConfig;
|
||||
|
||||
/**
|
||||
* @brief @p SerialDriver specific data.
|
||||
*/
|
||||
#define _serial_driver_data \
|
||||
_base_asynchronous_channel_data \
|
||||
/* Driver state.*/ \
|
||||
sdstate_t state; \
|
||||
/* Input queue.*/ \
|
||||
InputQueue iqueue; \
|
||||
/* Output queue.*/ \
|
||||
OutputQueue oqueue; \
|
||||
/* Input circular buffer.*/ \
|
||||
uint8_t ib[SERIAL_BUFFERS_SIZE]; \
|
||||
/* Output circular buffer.*/ \
|
||||
uint8_t ob[SERIAL_BUFFERS_SIZE]; \
|
||||
/* End of the mandatory fields.*/ \
|
||||
/* Pointer to the USART registers block.*/ \
|
||||
USART_TypeDef *usart;
|
||||
|
||||
/*===========================================================================*/
|
||||
/* Driver macros. */
|
||||
/*===========================================================================*/
|
||||
|
||||
/*
|
||||
* Extra USARTs definitions here (missing from the ST header file).
|
||||
*/
|
||||
#define USART_CR2_STOP1_BITS (0 << 12) /**< @brief CR2 1 stop bit value.*/
|
||||
#define USART_CR2_STOP0P5_BITS (1 << 12) /**< @brief CR2 0.5 stop bit value.*/
|
||||
#define USART_CR2_STOP2_BITS (2 << 12) /**< @brief CR2 2 stop bit value.*/
|
||||
#define USART_CR2_STOP1P5_BITS (3 << 12) /**< @brief CR2 1.5 stop bit value.*/
|
||||
|
||||
/*===========================================================================*/
|
||||
/* External declarations. */
|
||||
/*===========================================================================*/
|
||||
|
||||
#if STM32_SERIAL_USE_USART1 && !defined(__DOXYGEN__)
|
||||
extern SerialDriver SD1;
|
||||
#endif
|
||||
#if STM32_SERIAL_USE_USART2 && !defined(__DOXYGEN__)
|
||||
extern SerialDriver SD2;
|
||||
#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 */
|
||||
|
||||
#endif /* _SERIAL_LLD_H_ */
|
||||
|
||||
/** @} */
|
||||
Loading…
Reference in New Issue