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/*
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/can_lld.c
* @brief STM32 CAN subsystem low level driver source
* @addtogroup STM32_CAN
* @{
*/
#include "ch.h"
#include "hal.h"
#if CH_HAL_USE_CAN || defined(__DOXYGEN__)
/*===========================================================================*/
/* Low Level Driver exported variables. */
/*===========================================================================*/
/** @brief ADC1 driver identifier.*/
#if USE_STM32_CAN1 || defined(__DOXYGEN__)
CANDriver CAND1;
#endif
/*===========================================================================*/
/* Low Level Driver local variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Low Level Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Low Level Driver interrupt handlers. */
/*===========================================================================*/
/*
* CAN1 TX interrupt handler.
*/
CH_IRQ_HANDLER(Vector8C) {
CH_IRQ_PROLOGUE();
/* No more events until a message is transmitted.*/
CAN1->IER &= ~CAN_IER_TMEIE;
chEvtBroadcastI(&CAND1.cd_txempty_event);
CH_IRQ_EPILOGUE();
}
/*
* CAN1 RX0 interrupt handler.
*/
CH_IRQ_HANDLER(Vector90) {
CH_IRQ_PROLOGUE();
/* No more events until the incoming messages queues are emptied.*/
CAN1->IER &= ~(CAN_IER_FMPIE0 | CAN_IER_FMPIE1);
chEvtBroadcastI(&CAND1.cd_rxfull_event);
CH_IRQ_EPILOGUE();
}
/*
* CAN1 RX1 interrupt handler.
*/
CH_IRQ_HANDLER(Vector94) {
CH_IRQ_PROLOGUE();
/* No more events until the incoming messages queues are emptied.*/
CAN1->IER &= ~(CAN_IER_FMPIE0 | CAN_IER_FMPIE1);
chEvtBroadcastI(&CAND1.cd_rxfull_event);
CH_IRQ_EPILOGUE();
}
/*
* CAN1 SCE interrupt handler.
*/
CH_IRQ_HANDLER(Vector98) {
CH_IRQ_PROLOGUE();
canAddFlagsI(&CAND1, 1);
chEvtBroadcastI(&CAND1.cd_error_event);
CAN1->MSR = CAN_MSR_ERRI;
CH_IRQ_EPILOGUE();
}
/*===========================================================================*/
/* Low Level Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level CAN driver initialization.
*/
void can_lld_init(void) {
}
/**
* @brief Configures and activates the CAN peripheral.
*
* @param[in] canp pointer to the @p CANDriver object
*/
void can_lld_start(CANDriver *canp) {
if (canp->cd_state == CAN_STOP) {
/* Clock activation.*/
}
/* Configuration.*/
}
/**
* @brief Deactivates the CAN peripheral.
*
* @param[in] canp pointer to the @p CANDriver object
*/
void can_lld_stop(CANDriver *canp) {
}
/**
* @brief Determines whether a frame can be transmitted.
*
* @param[in] canp pointer to the @p CANDriver object
*
* @return The queue space availability.
* @retval FALSE no space in the transmit queue.
* @retval TRUE transmit slot available.
*/
bool_t can_lld_can_transmit(CANDriver *canp) {
return FALSE;
}
/**
* @brief Inserts a frame into the transmit queue.
*
* @param[in] canp pointer to the @p CANDriver object
* @param[in] cfp pointer to the CAN frame to be transmitted
*
* @return The operation status.
* @retval RDY_OK frame transmitted.
*/
msg_t can_lld_transmit(CANDriver *canp, const CANFrame *cfp) {
return RDY_OK;
}
/**
* @brief Determines whether a frame has been received.
*
* @param[in] canp pointer to the @p CANDriver object
*
* @return The queue space availability.
* @retval FALSE no space in the transmit queue.
* @retval TRUE transmit slot available.
*/
bool_t can_lld_can_receive(CANDriver *canp) {
return FALSE;
}
/**
* @brief Receives a frame from the input queue.
*
* @param[in] canp pointer to the @p CANDriver object
* @param[out] cfp pointer to the buffer where the CAN frame is copied
*
* @return The operation status.
* @retval RDY_OK frame received.
*/
msg_t can_lld_receive(CANDriver *canp, CANFrame *cfp) {
return RDY_OK;
}
#if CAN_USE_SLEEP_MODE || defined(__DOXYGEN__)
/**
* @brief Enters the sleep mode.
*
* @param[in] canp pointer to the @p CANDriver object
*/
void can_lld_sleep(CANDriver *canp) {
}
/**
* @brief Enforces leaving the sleep mode.
*
* @param[in] canp pointer to the @p CANDriver object
*/
void can_lld_wakeup(CANDriver *canp) {
}
#endif /* CAN_USE_SLEEP_MODE */
#endif /* CH_HAL_USE_CAN */
/** @} */
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