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hoverboard-firmware-hack-fo.../Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_can.c

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Initial commit
2019-10-06 13:09:15 +00:00
/**
******************************************************************************
* @file stm32f1xx_hal_can.c
* @author MCD Application Team
* @version V1.1.1
* @date 12-May-2017
* @brief CAN HAL module driver.
* This file provides firmware functions to manage the following
* functionalities of the Controller Area Network (CAN) peripheral:
* + Initialization and de-initialization functions
* + IO operation functions
* + Peripheral Control functions
* + Peripheral State and Error functions
*
@verbatim
==============================================================================
##### How to use this driver #####
==============================================================================
[..]
(#) Enable the CAN controller interface clock using
__HAL_RCC_CAN1_CLK_ENABLE() for CAN1 and __HAL_RCC_CAN2_CLK_ENABLE() for CAN2
-@- In case you are using CAN2 only, you have to enable the CAN1 clock.
(#) CAN pins configuration
(++) Enable the clock for the CAN GPIOs using the following function:
__HAL_RCC_GPIOx_CLK_ENABLE();
(++) Connect and configure the involved CAN pins using the
following function HAL_GPIO_Init();
(#) Initialize and configure the CAN using HAL_CAN_Init() function.
(#) Transmit the desired CAN frame using HAL_CAN_Transmit() function.
(#) Or transmit the desired CAN frame using HAL_CAN_Transmit_IT() function.
(#) Receive a CAN frame using HAL_CAN_Receive() function.
(#) Or receive a CAN frame using HAL_CAN_Receive_IT() function.
*** Polling mode IO operation ***
=================================
[..]
(+) Start the CAN peripheral transmission and wait the end of this operation
using HAL_CAN_Transmit(), at this stage user can specify the value of timeout
according to his end application
(+) Start the CAN peripheral reception and wait the end of this operation
using HAL_CAN_Receive(), at this stage user can specify the value of timeout
according to his end application
*** Interrupt mode IO operation ***
===================================
[..]
(+) Start the CAN peripheral transmission using HAL_CAN_Transmit_IT()
(+) Start the CAN peripheral reception using HAL_CAN_Receive_IT()
(+) Use HAL_CAN_IRQHandler() called under the used CAN Interrupt subroutine
(+) At CAN end of transmission HAL_CAN_TxCpltCallback() function is executed and user can
add his own code by customization of function pointer HAL_CAN_TxCpltCallback
(+) In case of CAN Error, HAL_CAN_ErrorCallback() function is executed and user can
add his own code by customization of function pointer HAL_CAN_ErrorCallback
*** CAN HAL driver macros list ***
=============================================
[..]
Below the list of most used macros in CAN HAL driver.
(+) __HAL_CAN_ENABLE_IT: Enable the specified CAN interrupts
(+) __HAL_CAN_DISABLE_IT: Disable the specified CAN interrupts
(+) __HAL_CAN_GET_IT_SOURCE: Check if the specified CAN interrupt source is enabled or disabled
(+) __HAL_CAN_CLEAR_FLAG: Clear the CAN's pending flags
(+) __HAL_CAN_GET_FLAG: Get the selected CAN's flag status
[..]
(@) You can refer to the CAN HAL driver header file for more useful macros
@endverbatim
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f1xx_hal.h"
/** @addtogroup STM32F1xx_HAL_Driver
* @{
*/
/** @defgroup CAN CAN
* @brief CAN driver modules
* @{
*/
#ifdef HAL_CAN_MODULE_ENABLED
#if defined(STM32F103x6) || defined(STM32F103xB) || defined(STM32F103xE) || \
defined(STM32F103xG) || defined(STM32F105xC) || defined(STM32F107xC)
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/** @defgroup CAN_Private_Constants CAN Private Constants
* @{
*/
#define CAN_TIMEOUT_VALUE 10U
/**
* @}
*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/** @defgroup CAN_Private_Functions CAN Private Functions
* @{
*/
static HAL_StatusTypeDef CAN_Receive_IT(CAN_HandleTypeDef* hcan, uint8_t FIFONumber);
static HAL_StatusTypeDef CAN_Transmit_IT(CAN_HandleTypeDef* hcan);
/**
* @}
*/
/* Exported functions --------------------------------------------------------*/
/** @defgroup CAN_Exported_Functions CAN Exported Functions
* @{
*/
/** @defgroup CAN_Exported_Functions_Group1 Initialization and de-initialization functions
* @brief Initialization and Configuration functions
*
@verbatim
==============================================================================
##### Initialization and de-initialization functions #####
==============================================================================
[..] This section provides functions allowing to:
(+) Initialize and configure the CAN.
(+) De-initialize the CAN.
@endverbatim
* @{
*/
/**
* @brief Initializes the CAN peripheral according to the specified
* parameters in the CAN_InitStruct.
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CAN_Init(CAN_HandleTypeDef* hcan)
{
uint32_t status = CAN_INITSTATUS_FAILED; /* Default init status */
uint32_t tickstart = 0U;
uint32_t tmp_mcr = 0U;
/* Check CAN handle */
if(hcan == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_CAN_ALL_INSTANCE(hcan->Instance));
assert_param(IS_FUNCTIONAL_STATE(hcan->Init.TTCM));
assert_param(IS_FUNCTIONAL_STATE(hcan->Init.ABOM));
assert_param(IS_FUNCTIONAL_STATE(hcan->Init.AWUM));
assert_param(IS_FUNCTIONAL_STATE(hcan->Init.NART));
assert_param(IS_FUNCTIONAL_STATE(hcan->Init.RFLM));
assert_param(IS_FUNCTIONAL_STATE(hcan->Init.TXFP));
assert_param(IS_CAN_MODE(hcan->Init.Mode));
assert_param(IS_CAN_SJW(hcan->Init.SJW));
assert_param(IS_CAN_BS1(hcan->Init.BS1));
assert_param(IS_CAN_BS2(hcan->Init.BS2));
assert_param(IS_CAN_PRESCALER(hcan->Init.Prescaler));
if(hcan->State == HAL_CAN_STATE_RESET)
{
/* Allocate lock resource and initialize it */
hcan->Lock = HAL_UNLOCKED;
/* Init the low level hardware */
HAL_CAN_MspInit(hcan);
}
/* Initialize the CAN state*/
hcan->State = HAL_CAN_STATE_BUSY;
/* Exit from sleep mode */
CLEAR_BIT(hcan->Instance->MCR, CAN_MCR_SLEEP);
/* Request initialisation */
SET_BIT(hcan->Instance->MCR, CAN_MCR_INRQ);
/* Get timeout */
tickstart = HAL_GetTick();
/* Wait the acknowledge */
while(HAL_IS_BIT_CLR(hcan->Instance->MSR, CAN_MSR_INAK))
{
if((HAL_GetTick()-tickstart) > CAN_TIMEOUT_VALUE)
{
hcan->State= HAL_CAN_STATE_TIMEOUT;
/* Process unlocked */
__HAL_UNLOCK(hcan);
return HAL_TIMEOUT;
}
}
/* Check acknowledge */
if ((hcan->Instance->MSR & CAN_MSR_INAK) == CAN_MSR_INAK)
{
/* Set the time triggered communication mode */
if (hcan->Init.TTCM == ENABLE)
{
SET_BIT(tmp_mcr, CAN_MCR_TTCM);
}
else
{
CLEAR_BIT(tmp_mcr, CAN_MCR_TTCM);
}
/* Set the automatic bus-off management */
if (hcan->Init.ABOM == ENABLE)
{
SET_BIT(tmp_mcr, CAN_MCR_ABOM);
}
else
{
CLEAR_BIT(tmp_mcr, CAN_MCR_ABOM);
}
/* Set the automatic wake-up mode */
if (hcan->Init.AWUM == ENABLE)
{
SET_BIT(tmp_mcr, CAN_MCR_AWUM);
}
else
{
CLEAR_BIT(tmp_mcr, CAN_MCR_AWUM);
}
/* Set the no automatic retransmission */
if (hcan->Init.NART == ENABLE)
{
SET_BIT(tmp_mcr, CAN_MCR_NART);
}
else
{
CLEAR_BIT(tmp_mcr, CAN_MCR_NART);
}
/* Set the receive FIFO locked mode */
if (hcan->Init.RFLM == ENABLE)
{
SET_BIT(tmp_mcr, CAN_MCR_RFLM);
}
else
{
CLEAR_BIT(tmp_mcr, CAN_MCR_RFLM);
}
/* Set the transmit FIFO priority */
if (hcan->Init.TXFP == ENABLE)
{
SET_BIT(tmp_mcr, CAN_MCR_TXFP);
}
else
{
CLEAR_BIT(tmp_mcr, CAN_MCR_TXFP);
}
/* Update register MCR */
MODIFY_REG(hcan->Instance->MCR,
CAN_MCR_TTCM |
CAN_MCR_ABOM |
CAN_MCR_AWUM |
CAN_MCR_NART |
CAN_MCR_RFLM |
CAN_MCR_TXFP,
tmp_mcr);
/* Set the bit timing register */
WRITE_REG(hcan->Instance->BTR, (uint32_t)(hcan->Init.Mode |
hcan->Init.SJW |
hcan->Init.BS1 |
hcan->Init.BS2 |
(hcan->Init.Prescaler - 1U)));
/* Request leave initialisation */
CLEAR_BIT(hcan->Instance->MCR, CAN_MCR_INRQ);
/* Get timeout */
tickstart = HAL_GetTick();
/* Wait the acknowledge */
while(HAL_IS_BIT_SET(hcan->Instance->MSR, CAN_MSR_INAK))
{
if((HAL_GetTick()-tickstart) > CAN_TIMEOUT_VALUE)
{
hcan->State= HAL_CAN_STATE_TIMEOUT;
/* Process unlocked */
__HAL_UNLOCK(hcan);
return HAL_TIMEOUT;
}
}
/* Check acknowledged */
if(HAL_IS_BIT_CLR(hcan->Instance->MSR, CAN_MSR_INAK))
{
status = CAN_INITSTATUS_SUCCESS;
}
}
if(status == CAN_INITSTATUS_SUCCESS)
{
/* Set CAN error code to none */
hcan->ErrorCode = HAL_CAN_ERROR_NONE;
/* Initialize the CAN state */
hcan->State = HAL_CAN_STATE_READY;
/* Return function status */
return HAL_OK;
}
else
{
/* Initialize the CAN state */
hcan->State = HAL_CAN_STATE_ERROR;
/* Return function status */
return HAL_ERROR;
}
}
/**
* @brief Configures the CAN reception filter according to the specified
* parameters in the CAN_FilterInitStruct.
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @param sFilterConfig: pointer to a CAN_FilterConfTypeDef structure that
* contains the filter configuration information.
* @retval None
*/
HAL_StatusTypeDef HAL_CAN_ConfigFilter(CAN_HandleTypeDef* hcan, CAN_FilterConfTypeDef* sFilterConfig)
{
uint32_t filternbrbitpos = 0U;
/* Prevent unused argument(s) compilation warning */
UNUSED(hcan);
/* Check the parameters */
assert_param(IS_CAN_FILTER_NUMBER(sFilterConfig->FilterNumber));
assert_param(IS_CAN_FILTER_MODE(sFilterConfig->FilterMode));
assert_param(IS_CAN_FILTER_SCALE(sFilterConfig->FilterScale));
assert_param(IS_CAN_FILTER_FIFO(sFilterConfig->FilterFIFOAssignment));
assert_param(IS_FUNCTIONAL_STATE(sFilterConfig->FilterActivation));
assert_param(IS_CAN_BANKNUMBER(sFilterConfig->BankNumber));
filternbrbitpos = (1U) << sFilterConfig->FilterNumber;
/* Initialisation mode for the filter */
/* Select the start slave bank */
MODIFY_REG(hcan->Instance->FMR ,
CAN_FMR_CAN2SB ,
CAN_FMR_FINIT |
(uint32_t)(sFilterConfig->BankNumber << 8U) );
/* Filter Deactivation */
CLEAR_BIT(hcan->Instance->FA1R, filternbrbitpos);
/* Filter Scale */
if (sFilterConfig->FilterScale == CAN_FILTERSCALE_16BIT)
{
/* 16-bit scale for the filter */
CLEAR_BIT(hcan->Instance->FS1R, filternbrbitpos);
/* First 16-bit identifier and First 16-bit mask */
/* Or First 16-bit identifier and Second 16-bit identifier */
hcan->Instance->sFilterRegister[sFilterConfig->FilterNumber].FR1 =
((0x0000FFFFU & (uint32_t)sFilterConfig->FilterMaskIdLow) << 16U) |
(0x0000FFFFU & (uint32_t)sFilterConfig->FilterIdLow);
/* Second 16-bit identifier and Second 16-bit mask */
/* Or Third 16-bit identifier and Fourth 16-bit identifier */
hcan->Instance->sFilterRegister[sFilterConfig->FilterNumber].FR2 =
((0x0000FFFFU & (uint32_t)sFilterConfig->FilterMaskIdHigh) << 16U) |
(0x0000FFFFU & (uint32_t)sFilterConfig->FilterIdHigh);
}
if (sFilterConfig->FilterScale == CAN_FILTERSCALE_32BIT)
{
/* 32-bit scale for the filter */
SET_BIT(hcan->Instance->FS1R, filternbrbitpos);
/* 32-bit identifier or First 32-bit identifier */
hcan->Instance->sFilterRegister[sFilterConfig->FilterNumber].FR1 =
((0x0000FFFFU & (uint32_t)sFilterConfig->FilterIdHigh) << 16U) |
(0x0000FFFFU & (uint32_t)sFilterConfig->FilterIdLow);
/* 32-bit mask or Second 32-bit identifier */
hcan->Instance->sFilterRegister[sFilterConfig->FilterNumber].FR2 =
((0x0000FFFFU & (uint32_t)sFilterConfig->FilterMaskIdHigh) << 16U) |
(0x0000FFFFU & (uint32_t)sFilterConfig->FilterMaskIdLow);
}
/* Filter Mode */
if (sFilterConfig->FilterMode == CAN_FILTERMODE_IDMASK)
{
/*Id/Mask mode for the filter*/
CLEAR_BIT(hcan->Instance->FM1R, filternbrbitpos);
}
else /* CAN_FilterInitStruct->CAN_FilterMode == CAN_FilterMode_IdList */
{
/*Identifier list mode for the filter*/
SET_BIT(hcan->Instance->FM1R, filternbrbitpos);
}
/* Filter FIFO assignment */
if (sFilterConfig->FilterFIFOAssignment == CAN_FILTER_FIFO0)
{
/* FIFO 0 assignation for the filter */
CLEAR_BIT(hcan->Instance->FFA1R, filternbrbitpos);
}
else
{
/* FIFO 1 assignation for the filter */
SET_BIT(hcan->Instance->FFA1R, filternbrbitpos);
}
/* Filter activation */
if (sFilterConfig->FilterActivation == ENABLE)
{
SET_BIT(hcan->Instance->FA1R, filternbrbitpos);
}
/* Leave the initialisation mode for the filter */
CLEAR_BIT(hcan->Instance->FMR, ((uint32_t)CAN_FMR_FINIT));
/* Return function status */
return HAL_OK;
}
/**
* @brief Deinitializes the CANx peripheral registers to their default reset values.
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CAN_DeInit(CAN_HandleTypeDef* hcan)
{
/* Check CAN handle */
if(hcan == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_CAN_ALL_INSTANCE(hcan->Instance));
/* Change CAN state */
hcan->State = HAL_CAN_STATE_BUSY;
/* DeInit the low level hardware */
HAL_CAN_MspDeInit(hcan);
/* Change CAN state */
hcan->State = HAL_CAN_STATE_RESET;
/* Release Lock */
__HAL_UNLOCK(hcan);
/* Return function status */
return HAL_OK;
}
/**
* @brief Initializes the CAN MSP.
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval None
*/
__weak void HAL_CAN_MspInit(CAN_HandleTypeDef* hcan)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hcan);
/* NOTE : This function Should not be modified, when the callback is needed,
the HAL_CAN_MspInit can be implemented in the user file
*/
}
/**
* @brief DeInitializes the CAN MSP.
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval None
*/
__weak void HAL_CAN_MspDeInit(CAN_HandleTypeDef* hcan)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hcan);
/* NOTE : This function Should not be modified, when the callback is needed,
the HAL_CAN_MspDeInit can be implemented in the user file
*/
}
/**
* @}
*/
/** @defgroup CAN_Exported_Functions_Group2 Input and Output operation functions
* @brief I/O operation functions
*
@verbatim
==============================================================================
##### IO operation functions #####
==============================================================================
[..] This section provides functions allowing to:
(+) Transmit a CAN frame message.
(+) Receive a CAN frame message.
(+) Enter CAN peripheral in sleep mode.
(+) Wake up the CAN peripheral from sleep mode.
@endverbatim
* @{
*/
/**
* @brief Initiates and transmits a CAN frame message.
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @param Timeout: Specify Timeout value
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CAN_Transmit(CAN_HandleTypeDef* hcan, uint32_t Timeout)
{
uint32_t transmitmailbox = CAN_TXSTATUS_NOMAILBOX;
uint32_t tickstart = 0U;
/* Check the parameters */
assert_param(IS_CAN_IDTYPE(hcan->pTxMsg->IDE));
assert_param(IS_CAN_RTR(hcan->pTxMsg->RTR));
assert_param(IS_CAN_DLC(hcan->pTxMsg->DLC));
if(((hcan->Instance->TSR&CAN_TSR_TME0) == CAN_TSR_TME0) || \
((hcan->Instance->TSR&CAN_TSR_TME1) == CAN_TSR_TME1) || \
((hcan->Instance->TSR&CAN_TSR_TME2) == CAN_TSR_TME2))
{
/* Process locked */
__HAL_LOCK(hcan);
/* Change CAN state */
switch(hcan->State)
{
case(HAL_CAN_STATE_BUSY_RX0):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX0;
break;
case(HAL_CAN_STATE_BUSY_RX1):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX1;
break;
case(HAL_CAN_STATE_BUSY_RX0_RX1):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX0_RX1;
break;
default: /* HAL_CAN_STATE_READY */
hcan->State = HAL_CAN_STATE_BUSY_TX;
break;
}
/* Select one empty transmit mailbox */
if (HAL_IS_BIT_SET(hcan->Instance->TSR, CAN_TSR_TME0))
{
transmitmailbox = CAN_TXMAILBOX_0;
}
else if (HAL_IS_BIT_SET(hcan->Instance->TSR, CAN_TSR_TME1))
{
transmitmailbox = CAN_TXMAILBOX_1;
}
else
{
transmitmailbox = CAN_TXMAILBOX_2;
}
/* Set up the Id */
hcan->Instance->sTxMailBox[transmitmailbox].TIR &= CAN_TI0R_TXRQ;
if (hcan->pTxMsg->IDE == CAN_ID_STD)
{
assert_param(IS_CAN_STDID(hcan->pTxMsg->StdId));
hcan->Instance->sTxMailBox[transmitmailbox].TIR |= ((hcan->pTxMsg->StdId << CAN_TI0R_STID_Pos) |
hcan->pTxMsg->RTR);
}
else
{
assert_param(IS_CAN_EXTID(hcan->pTxMsg->ExtId));
hcan->Instance->sTxMailBox[transmitmailbox].TIR |= ((hcan->pTxMsg->ExtId << CAN_TI0R_EXID_Pos) |
hcan->pTxMsg->IDE |
hcan->pTxMsg->RTR);
}
/* Set up the DLC */
hcan->pTxMsg->DLC &= (uint8_t)0x0000000F;
hcan->Instance->sTxMailBox[transmitmailbox].TDTR &= 0xFFFFFFF0U;
hcan->Instance->sTxMailBox[transmitmailbox].TDTR |= hcan->pTxMsg->DLC;
/* Set up the data field */
WRITE_REG(hcan->Instance->sTxMailBox[transmitmailbox].TDLR, ((uint32_t)hcan->pTxMsg->Data[3] << CAN_TDL0R_DATA3_Pos) |
((uint32_t)hcan->pTxMsg->Data[2] << CAN_TDL0R_DATA2_Pos) |
((uint32_t)hcan->pTxMsg->Data[1] << CAN_TDL0R_DATA1_Pos) |
((uint32_t)hcan->pTxMsg->Data[0] << CAN_TDL0R_DATA0_Pos));
WRITE_REG(hcan->Instance->sTxMailBox[transmitmailbox].TDHR, ((uint32_t)hcan->pTxMsg->Data[7] << CAN_TDL0R_DATA3_Pos) |
((uint32_t)hcan->pTxMsg->Data[6] << CAN_TDL0R_DATA2_Pos) |
((uint32_t)hcan->pTxMsg->Data[5] << CAN_TDL0R_DATA1_Pos) |
((uint32_t)hcan->pTxMsg->Data[4] << CAN_TDL0R_DATA0_Pos));
/* Request transmission */
SET_BIT(hcan->Instance->sTxMailBox[transmitmailbox].TIR, CAN_TI0R_TXRQ);
/* Get tick */
tickstart = HAL_GetTick();
/* Check End of transmission flag */
while(!(__HAL_CAN_TRANSMIT_STATUS(hcan, transmitmailbox)))
{
/* Check for the Timeout */
if(Timeout != HAL_MAX_DELAY)
{
if((Timeout == 0U) || ((HAL_GetTick()-tickstart) > Timeout))
{
hcan->State = HAL_CAN_STATE_TIMEOUT;
/* Cancel transmission */
__HAL_CAN_CANCEL_TRANSMIT(hcan, transmitmailbox);
/* Process unlocked */
__HAL_UNLOCK(hcan);
return HAL_TIMEOUT;
}
}
}
/* Change CAN state */
switch(hcan->State)
{
case(HAL_CAN_STATE_BUSY_TX_RX0):
hcan->State = HAL_CAN_STATE_BUSY_RX0;
break;
case(HAL_CAN_STATE_BUSY_TX_RX1):
hcan->State = HAL_CAN_STATE_BUSY_RX1;
break;
case(HAL_CAN_STATE_BUSY_TX_RX0_RX1):
hcan->State = HAL_CAN_STATE_BUSY_RX0_RX1;
break;
default: /* HAL_CAN_STATE_BUSY_TX */
hcan->State = HAL_CAN_STATE_READY;
break;
}
/* Process unlocked */
__HAL_UNLOCK(hcan);
/* Return function status */
return HAL_OK;
}
else
{
/* Change CAN state */
hcan->State = HAL_CAN_STATE_ERROR;
/* Return function status */
return HAL_ERROR;
}
}
/**
* @brief Initiates and transmits a CAN frame message.
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CAN_Transmit_IT(CAN_HandleTypeDef* hcan)
{
uint32_t transmitmailbox = CAN_TXSTATUS_NOMAILBOX;
/* Check the parameters */
assert_param(IS_CAN_IDTYPE(hcan->pTxMsg->IDE));
assert_param(IS_CAN_RTR(hcan->pTxMsg->RTR));
assert_param(IS_CAN_DLC(hcan->pTxMsg->DLC));
if(((hcan->Instance->TSR&CAN_TSR_TME0) == CAN_TSR_TME0) || \
((hcan->Instance->TSR&CAN_TSR_TME1) == CAN_TSR_TME1) || \
((hcan->Instance->TSR&CAN_TSR_TME2) == CAN_TSR_TME2))
{
/* Process Locked */
__HAL_LOCK(hcan);
/* Select one empty transmit mailbox */
if(HAL_IS_BIT_SET(hcan->Instance->TSR, CAN_TSR_TME0))
{
transmitmailbox = CAN_TXMAILBOX_0;
}
else if(HAL_IS_BIT_SET(hcan->Instance->TSR, CAN_TSR_TME1))
{
transmitmailbox = CAN_TXMAILBOX_1;
}
else
{
transmitmailbox = CAN_TXMAILBOX_2;
}
/* Set up the Id */
hcan->Instance->sTxMailBox[transmitmailbox].TIR &= CAN_TI0R_TXRQ;
if(hcan->pTxMsg->IDE == CAN_ID_STD)
{
assert_param(IS_CAN_STDID(hcan->pTxMsg->StdId));
hcan->Instance->sTxMailBox[transmitmailbox].TIR |= ((hcan->pTxMsg->StdId << CAN_TI0R_STID_Pos) | \
hcan->pTxMsg->RTR);
}
else
{
assert_param(IS_CAN_EXTID(hcan->pTxMsg->ExtId));
hcan->Instance->sTxMailBox[transmitmailbox].TIR |= ((hcan->pTxMsg->ExtId << CAN_TI0R_EXID_Pos) | \
hcan->pTxMsg->IDE |
hcan->pTxMsg->RTR);
}
/* Set up the DLC */
hcan->pTxMsg->DLC &= (uint8_t)0x0000000FU;
hcan->Instance->sTxMailBox[transmitmailbox].TDTR &= 0xFFFFFFF0U;
hcan->Instance->sTxMailBox[transmitmailbox].TDTR |= hcan->pTxMsg->DLC;
/* Set up the data field */
WRITE_REG(hcan->Instance->sTxMailBox[transmitmailbox].TDLR, ((uint32_t)hcan->pTxMsg->Data[3U] << CAN_TDL0R_DATA3_Pos) |
((uint32_t)hcan->pTxMsg->Data[2U] << CAN_TDL0R_DATA2_Pos) |
((uint32_t)hcan->pTxMsg->Data[1U] << CAN_TDL0R_DATA1_Pos) |
((uint32_t)hcan->pTxMsg->Data[0U] << CAN_TDL0R_DATA0_Pos));
WRITE_REG(hcan->Instance->sTxMailBox[transmitmailbox].TDHR, ((uint32_t)hcan->pTxMsg->Data[7U] << CAN_TDL0R_DATA3_Pos) |
((uint32_t)hcan->pTxMsg->Data[6U] << CAN_TDL0R_DATA2_Pos) |
((uint32_t)hcan->pTxMsg->Data[5U] << CAN_TDL0R_DATA1_Pos) |
((uint32_t)hcan->pTxMsg->Data[4U] << CAN_TDL0R_DATA0_Pos));
/* Change CAN state */
switch(hcan->State)
{
case(HAL_CAN_STATE_BUSY_RX0):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX0;
break;
case(HAL_CAN_STATE_BUSY_RX1):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX1;
break;
case(HAL_CAN_STATE_BUSY_RX0_RX1):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX0_RX1;
break;
default: /* HAL_CAN_STATE_READY */
hcan->State = HAL_CAN_STATE_BUSY_TX;
break;
}
/* Set CAN error code to none */
hcan->ErrorCode = HAL_CAN_ERROR_NONE;
/* Process Unlocked */
__HAL_UNLOCK(hcan);
/* Request transmission */
hcan->Instance->sTxMailBox[transmitmailbox].TIR |= CAN_TI0R_TXRQ;
/* Enable interrupts: */
/* - Enable Error warning Interrupt */
/* - Enable Error passive Interrupt */
/* - Enable Bus-off Interrupt */
/* - Enable Last error code Interrupt */
/* - Enable Error Interrupt */
/* - Enable Transmit mailbox empty Interrupt */
__HAL_CAN_ENABLE_IT(hcan, CAN_IT_EWG |
CAN_IT_EPV |
CAN_IT_BOF |
CAN_IT_LEC |
CAN_IT_ERR |
CAN_IT_TME );
}
else
{
/* Change CAN state */
hcan->State = HAL_CAN_STATE_ERROR;
/* Return function status */
return HAL_ERROR;
}
return HAL_OK;
}
/**
* @brief Receives a correct CAN frame.
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @param FIFONumber: FIFO Number value
* @param Timeout: Specify Timeout value
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CAN_Receive(CAN_HandleTypeDef* hcan, uint8_t FIFONumber, uint32_t Timeout)
{
uint32_t tickstart = 0U;
CanRxMsgTypeDef* pRxMsg = NULL;
/* Check the parameters */
assert_param(IS_CAN_FIFO(FIFONumber));
/* Check if CAN state is not busy for RX FIFO0 */
if ((FIFONumber == CAN_FIFO0) && ((hcan->State == HAL_CAN_STATE_BUSY_RX0) || \
(hcan->State == HAL_CAN_STATE_BUSY_TX_RX0) || \
(hcan->State == HAL_CAN_STATE_BUSY_RX0_RX1) || \
(hcan->State == HAL_CAN_STATE_BUSY_TX_RX0_RX1)))
{
return HAL_BUSY;
}
/* Check if CAN state is not busy for RX FIFO1 */
if ((FIFONumber == CAN_FIFO1) && ((hcan->State == HAL_CAN_STATE_BUSY_RX1) || \
(hcan->State == HAL_CAN_STATE_BUSY_TX_RX1) || \
(hcan->State == HAL_CAN_STATE_BUSY_RX0_RX1) || \
(hcan->State == HAL_CAN_STATE_BUSY_TX_RX0_RX1)))
{
return HAL_BUSY;
}
/* Process locked */
__HAL_LOCK(hcan);
/* Change CAN state */
if (FIFONumber == CAN_FIFO0)
{
switch(hcan->State)
{
case(HAL_CAN_STATE_BUSY_TX):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX0;
break;
case(HAL_CAN_STATE_BUSY_RX1):
hcan->State = HAL_CAN_STATE_BUSY_RX0_RX1;
break;
case(HAL_CAN_STATE_BUSY_TX_RX1):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX0_RX1;
break;
default: /* HAL_CAN_STATE_READY */
hcan->State = HAL_CAN_STATE_BUSY_RX0;
break;
}
}
else /* FIFONumber == CAN_FIFO1 */
{
switch(hcan->State)
{
case(HAL_CAN_STATE_BUSY_TX):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX1;
break;
case(HAL_CAN_STATE_BUSY_RX0):
hcan->State = HAL_CAN_STATE_BUSY_RX0_RX1;
break;
case(HAL_CAN_STATE_BUSY_TX_RX0):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX0_RX1;
break;
default: /* HAL_CAN_STATE_READY */
hcan->State = HAL_CAN_STATE_BUSY_RX1;
break;
}
}
/* Get tick */
tickstart = HAL_GetTick();
/* Check pending message */
while(__HAL_CAN_MSG_PENDING(hcan, FIFONumber) == 0U)
{
/* Check for the Timeout */
if(Timeout != HAL_MAX_DELAY)
{
if((Timeout == 0U) || ((HAL_GetTick()-tickstart) > Timeout))
{
hcan->State = HAL_CAN_STATE_TIMEOUT;
/* Process unlocked */
__HAL_UNLOCK(hcan);
return HAL_TIMEOUT;
}
}
}
/* Set RxMsg pointer */
if(FIFONumber == CAN_FIFO0)
{
pRxMsg = hcan->pRxMsg;
}
else /* FIFONumber == CAN_FIFO1 */
{
pRxMsg = hcan->pRx1Msg;
}
/* Get the Id */
pRxMsg->IDE = (uint8_t)CAN_ID_EXT & hcan->Instance->sFIFOMailBox[FIFONumber].RIR;
if (pRxMsg->IDE == CAN_ID_STD)
{
pRxMsg->StdId = 0x000007FFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RIR >> 21U);
}
else
{
pRxMsg->ExtId = 0x1FFFFFFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RIR >> 3U);
}
pRxMsg->RTR = (uint8_t)CAN_RTR_REMOTE & hcan->Instance->sFIFOMailBox[FIFONumber].RIR;
/* Get the DLC */
pRxMsg->DLC = (uint8_t)0x0FU & hcan->Instance->sFIFOMailBox[FIFONumber].RDTR;
/* Get the FMI */
pRxMsg->FMI = (uint8_t)0xFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RDTR >> 8U);
/* Get the FIFONumber */
pRxMsg->FIFONumber = FIFONumber;
/* Get the data field */
pRxMsg->Data[0] = (uint8_t)0xFFU & hcan->Instance->sFIFOMailBox[FIFONumber].RDLR;
pRxMsg->Data[1] = (uint8_t)0xFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RDLR >> 8U);
pRxMsg->Data[2] = (uint8_t)0xFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RDLR >> 16U);
pRxMsg->Data[3] = (uint8_t)0xFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RDLR >> 24U);
pRxMsg->Data[4] = (uint8_t)0xFFU & hcan->Instance->sFIFOMailBox[FIFONumber].RDHR;
pRxMsg->Data[5] = (uint8_t)0xFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RDHR >> 8U);
pRxMsg->Data[6] = (uint8_t)0xFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RDHR >> 16U);
pRxMsg->Data[7] = (uint8_t)0xFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RDHR >> 24U);
/* Release the FIFO */
if(FIFONumber == CAN_FIFO0)
{
/* Release FIFO0 */
__HAL_CAN_FIFO_RELEASE(hcan, CAN_FIFO0);
}
else /* FIFONumber == CAN_FIFO1 */
{
/* Release FIFO1 */
__HAL_CAN_FIFO_RELEASE(hcan, CAN_FIFO1);
}
/* Change CAN state */
if (FIFONumber == CAN_FIFO0)
{
switch(hcan->State)
{
case(HAL_CAN_STATE_BUSY_TX_RX0):
hcan->State = HAL_CAN_STATE_BUSY_TX;
break;
case(HAL_CAN_STATE_BUSY_RX0_RX1):
hcan->State = HAL_CAN_STATE_BUSY_RX1;
break;
case(HAL_CAN_STATE_BUSY_TX_RX0_RX1):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX1;
break;
default: /* HAL_CAN_STATE_BUSY_RX0 */
hcan->State = HAL_CAN_STATE_READY;
break;
}
}
else /* FIFONumber == CAN_FIFO1 */
{
switch(hcan->State)
{
case(HAL_CAN_STATE_BUSY_TX_RX1):
hcan->State = HAL_CAN_STATE_BUSY_TX;
break;
case(HAL_CAN_STATE_BUSY_RX0_RX1):
hcan->State = HAL_CAN_STATE_BUSY_RX0;
break;
case(HAL_CAN_STATE_BUSY_TX_RX0_RX1):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX0;
break;
default: /* HAL_CAN_STATE_BUSY_RX1 */
hcan->State = HAL_CAN_STATE_READY;
break;
}
}
/* Process unlocked */
__HAL_UNLOCK(hcan);
/* Return function status */
return HAL_OK;
}
/**
* @brief Receives a correct CAN frame.
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @param FIFONumber: Specify the FIFO number
* @retval HAL status
*/
HAL_StatusTypeDef HAL_CAN_Receive_IT(CAN_HandleTypeDef* hcan, uint8_t FIFONumber)
{
/* Check the parameters */
assert_param(IS_CAN_FIFO(FIFONumber));
/* Check if CAN state is not busy for RX FIFO0 */
if((FIFONumber == CAN_FIFO0) && ((hcan->State == HAL_CAN_STATE_BUSY_RX0) || \
(hcan->State == HAL_CAN_STATE_BUSY_TX_RX0) || \
(hcan->State == HAL_CAN_STATE_BUSY_RX0_RX1) || \
(hcan->State == HAL_CAN_STATE_BUSY_TX_RX0_RX1)))
{
return HAL_BUSY;
}
/* Check if CAN state is not busy for RX FIFO1 */
if((FIFONumber == CAN_FIFO1) && ((hcan->State == HAL_CAN_STATE_BUSY_RX1) || \
(hcan->State == HAL_CAN_STATE_BUSY_TX_RX1) || \
(hcan->State == HAL_CAN_STATE_BUSY_RX0_RX1) || \
(hcan->State == HAL_CAN_STATE_BUSY_TX_RX0_RX1)))
{
return HAL_BUSY;
}
/* Process locked */
__HAL_LOCK(hcan);
/* Change CAN state */
if(FIFONumber == CAN_FIFO0)
{
switch(hcan->State)
{
case(HAL_CAN_STATE_BUSY_TX):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX0;
break;
case(HAL_CAN_STATE_BUSY_RX1):
hcan->State = HAL_CAN_STATE_BUSY_RX0_RX1;
break;
case(HAL_CAN_STATE_BUSY_TX_RX1):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX0_RX1;
break;
default: /* HAL_CAN_STATE_READY */
hcan->State = HAL_CAN_STATE_BUSY_RX0;
break;
}
}
else /* FIFONumber == CAN_FIFO1 */
{
switch(hcan->State)
{
case(HAL_CAN_STATE_BUSY_TX):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX1;
break;
case(HAL_CAN_STATE_BUSY_RX0):
hcan->State = HAL_CAN_STATE_BUSY_RX0_RX1;
break;
case(HAL_CAN_STATE_BUSY_TX_RX0):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX0_RX1;
break;
default: /* HAL_CAN_STATE_READY */
hcan->State = HAL_CAN_STATE_BUSY_RX1;
break;
}
}
/* Set CAN error code to none */
hcan->ErrorCode = HAL_CAN_ERROR_NONE;
/* Enable interrupts: */
/* - Enable Error warning Interrupt */
/* - Enable Error passive Interrupt */
/* - Enable Bus-off Interrupt */
/* - Enable Last error code Interrupt */
/* - Enable Error Interrupt */
/* - Enable Transmit mailbox empty Interrupt */
__HAL_CAN_ENABLE_IT(hcan, CAN_IT_EWG |
CAN_IT_EPV |
CAN_IT_BOF |
CAN_IT_LEC |
CAN_IT_ERR |
CAN_IT_TME );
/* Process unlocked */
__HAL_UNLOCK(hcan);
if(FIFONumber == CAN_FIFO0)
{
/* Enable FIFO 0 overrun and message pending Interrupt */
__HAL_CAN_ENABLE_IT(hcan, CAN_IT_FOV0 | CAN_IT_FMP0);
}
else
{
/* Enable FIFO 1 overrun and message pending Interrupt */
__HAL_CAN_ENABLE_IT(hcan, CAN_IT_FOV1 | CAN_IT_FMP1);
}
/* Return function status */
return HAL_OK;
}
/**
* @brief Enters the Sleep (low power) mode.
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval HAL status.
*/
HAL_StatusTypeDef HAL_CAN_Sleep(CAN_HandleTypeDef* hcan)
{
uint32_t tickstart = 0U;
/* Process locked */
__HAL_LOCK(hcan);
/* Change CAN state */
hcan->State = HAL_CAN_STATE_BUSY;
/* Request Sleep mode */
MODIFY_REG(hcan->Instance->MCR,
CAN_MCR_INRQ ,
CAN_MCR_SLEEP );
/* Sleep mode status */
if (HAL_IS_BIT_CLR(hcan->Instance->MSR, CAN_MSR_SLAK) ||
HAL_IS_BIT_SET(hcan->Instance->MSR, CAN_MSR_INAK) )
{
/* Process unlocked */
__HAL_UNLOCK(hcan);
/* Return function status */
return HAL_ERROR;
}
/* Get tick */
tickstart = HAL_GetTick();
/* Wait the acknowledge */
while (HAL_IS_BIT_CLR(hcan->Instance->MSR, CAN_MSR_SLAK) ||
HAL_IS_BIT_SET(hcan->Instance->MSR, CAN_MSR_INAK))
{
if((HAL_GetTick()-tickstart) > CAN_TIMEOUT_VALUE)
{
hcan->State = HAL_CAN_STATE_TIMEOUT;
/* Process unlocked */
__HAL_UNLOCK(hcan);
return HAL_TIMEOUT;
}
}
/* Change CAN state */
hcan->State = HAL_CAN_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hcan);
/* Return function status */
return HAL_OK;
}
/**
* @brief Wakes up the CAN peripheral from sleep mode, after that the CAN peripheral
* is in the normal mode.
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval HAL status.
*/
HAL_StatusTypeDef HAL_CAN_WakeUp(CAN_HandleTypeDef* hcan)
{
uint32_t tickstart = 0U;
/* Process locked */
__HAL_LOCK(hcan);
/* Change CAN state */
hcan->State = HAL_CAN_STATE_BUSY;
/* Wake up request */
CLEAR_BIT(hcan->Instance->MCR, CAN_MCR_SLEEP);
/* Get timeout */
tickstart = HAL_GetTick();
/* Sleep mode status */
while((hcan->Instance->MSR & CAN_MSR_SLAK) == CAN_MSR_SLAK)
{
if((HAL_GetTick()-tickstart) > CAN_TIMEOUT_VALUE)
{
hcan->State= HAL_CAN_STATE_TIMEOUT;
/* Process unlocked */
__HAL_UNLOCK(hcan);
return HAL_TIMEOUT;
}
}
if(HAL_IS_BIT_SET(hcan->Instance->MSR, CAN_MSR_SLAK))
{
/* Process unlocked */
__HAL_UNLOCK(hcan);
/* Return function status */
return HAL_ERROR;
}
/* Change CAN state */
hcan->State = HAL_CAN_STATE_READY;
/* Process unlocked */
__HAL_UNLOCK(hcan);
/* Return function status */
return HAL_OK;
}
/**
* @brief Handles CAN interrupt request
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval None
*/
void HAL_CAN_IRQHandler(CAN_HandleTypeDef* hcan)
{
uint32_t tmp1 = 0U, tmp2 = 0U, tmp3 = 0U;
uint32_t errorcode = HAL_CAN_ERROR_NONE;
/* Check Overrun flag for FIFO0 */
tmp1 = __HAL_CAN_GET_FLAG(hcan, CAN_FLAG_FOV0);
tmp2 = __HAL_CAN_GET_IT_SOURCE(hcan, CAN_IT_FOV0);
if((tmp1 != 0U) && tmp2)
{
/* Set CAN error code to FOV0 error */
errorcode |= HAL_CAN_ERROR_FOV0;
/* Clear FIFO0 Overrun Flag */
__HAL_CAN_CLEAR_FLAG(hcan, CAN_FLAG_FOV0);
}
/* Check Overrun flag for FIFO1 */
tmp1 = __HAL_CAN_GET_FLAG(hcan, CAN_FLAG_FOV1);
tmp2 = __HAL_CAN_GET_IT_SOURCE(hcan, CAN_IT_FOV1);
if((tmp1 != 0U) && tmp2)
{
/* Set CAN error code to FOV1 error */
errorcode |= HAL_CAN_ERROR_FOV1;
/* Clear FIFO1 Overrun Flag */
__HAL_CAN_CLEAR_FLAG(hcan, CAN_FLAG_FOV1);
}
/* Check End of transmission flag */
if(__HAL_CAN_GET_IT_SOURCE(hcan, CAN_IT_TME))
{
/* Check Transmit request completion status */
tmp1 = __HAL_CAN_TRANSMIT_STATUS(hcan, CAN_TXMAILBOX_0);
tmp2 = __HAL_CAN_TRANSMIT_STATUS(hcan, CAN_TXMAILBOX_1);
tmp3 = __HAL_CAN_TRANSMIT_STATUS(hcan, CAN_TXMAILBOX_2);
if(tmp1 || tmp2 || tmp3)
{
tmp1 = __HAL_CAN_GET_FLAG(hcan, CAN_FLAG_TXOK0);
tmp2 = __HAL_CAN_GET_FLAG(hcan, CAN_FLAG_TXOK1);
tmp3 = __HAL_CAN_GET_FLAG(hcan, CAN_FLAG_TXOK2);
/* Check Transmit success */
if((tmp1) || (tmp2) || (tmp3))
{
/* Call transmit function */
CAN_Transmit_IT(hcan);
}
else /* Transmit failure */
{
/* Set CAN error code to TXFAIL error */
errorcode |= HAL_CAN_ERROR_TXFAIL;
}
/* Clear transmission status flags (RQCPx and TXOKx) */
SET_BIT(hcan->Instance->TSR, CAN_TSR_RQCP0 | CAN_TSR_RQCP1 | CAN_TSR_RQCP2 | \
CAN_FLAG_TXOK0 | CAN_FLAG_TXOK1 | CAN_FLAG_TXOK2);
}
}
tmp1 = __HAL_CAN_MSG_PENDING(hcan, CAN_FIFO0);
tmp2 = __HAL_CAN_GET_IT_SOURCE(hcan, CAN_IT_FMP0);
/* Check End of reception flag for FIFO0 */
if((tmp1 != 0U) && tmp2)
{
/* Call receive function */
CAN_Receive_IT(hcan, CAN_FIFO0);
}
tmp1 = __HAL_CAN_MSG_PENDING(hcan, CAN_FIFO1);
tmp2 = __HAL_CAN_GET_IT_SOURCE(hcan, CAN_IT_FMP1);
/* Check End of reception flag for FIFO1 */
if((tmp1 != 0U) && tmp2)
{
/* Call receive function */
CAN_Receive_IT(hcan, CAN_FIFO1);
}
/* Set error code in handle */
hcan->ErrorCode |= errorcode;
tmp1 = __HAL_CAN_GET_FLAG(hcan, CAN_FLAG_EWG);
tmp2 = __HAL_CAN_GET_IT_SOURCE(hcan, CAN_IT_EWG);
tmp3 = __HAL_CAN_GET_IT_SOURCE(hcan, CAN_IT_ERR);
/* Check Error Warning Flag */
if(tmp1 && tmp2 && tmp3)
{
/* Set CAN error code to EWG error */
hcan->ErrorCode |= HAL_CAN_ERROR_EWG;
/* No need for clear of Error Warning Flag as read-only */
}
tmp1 = __HAL_CAN_GET_FLAG(hcan, CAN_FLAG_EPV);
tmp2 = __HAL_CAN_GET_IT_SOURCE(hcan, CAN_IT_EPV);
tmp3 = __HAL_CAN_GET_IT_SOURCE(hcan, CAN_IT_ERR);
/* Check Error Passive Flag */
if(tmp1 && tmp2 && tmp3)
{
/* Set CAN error code to EPV error */
hcan->ErrorCode |= HAL_CAN_ERROR_EPV;
/* No need for clear of Error Passive Flag as read-only */
}
tmp1 = __HAL_CAN_GET_FLAG(hcan, CAN_FLAG_BOF);
tmp2 = __HAL_CAN_GET_IT_SOURCE(hcan, CAN_IT_BOF);
tmp3 = __HAL_CAN_GET_IT_SOURCE(hcan, CAN_IT_ERR);
/* Check Bus-Off Flag */
if(tmp1 && tmp2 && tmp3)
{
/* Set CAN error code to BOF error */
hcan->ErrorCode |= HAL_CAN_ERROR_BOF;
/* No need for clear of Bus-Off Flag as read-only */
}
tmp1 = HAL_IS_BIT_CLR(hcan->Instance->ESR, CAN_ESR_LEC);
tmp2 = __HAL_CAN_GET_IT_SOURCE(hcan, CAN_IT_LEC);
tmp3 = __HAL_CAN_GET_IT_SOURCE(hcan, CAN_IT_ERR);
/* Check Last error code Flag */
if((!tmp1) && tmp2 && tmp3)
{
tmp1 = (hcan->Instance->ESR & CAN_ESR_LEC);
switch(tmp1)
{
case(CAN_ESR_LEC_0):
/* Set CAN error code to STF error */
hcan->ErrorCode |= HAL_CAN_ERROR_STF;
break;
case(CAN_ESR_LEC_1):
/* Set CAN error code to FOR error */
hcan->ErrorCode |= HAL_CAN_ERROR_FOR;
break;
case(CAN_ESR_LEC_1 | CAN_ESR_LEC_0):
/* Set CAN error code to ACK error */
hcan->ErrorCode |= HAL_CAN_ERROR_ACK;
break;
case(CAN_ESR_LEC_2):
/* Set CAN error code to BR error */
hcan->ErrorCode |= HAL_CAN_ERROR_BR;
break;
case(CAN_ESR_LEC_2 | CAN_ESR_LEC_0):
/* Set CAN error code to BD error */
hcan->ErrorCode |= HAL_CAN_ERROR_BD;
break;
case(CAN_ESR_LEC_2 | CAN_ESR_LEC_1):
/* Set CAN error code to CRC error */
hcan->ErrorCode |= HAL_CAN_ERROR_CRC;
break;
default:
break;
}
/* Clear Last error code Flag */
CLEAR_BIT(hcan->Instance->ESR, CAN_ESR_LEC);
}
/* Call the Error call Back in case of Errors */
if(hcan->ErrorCode != HAL_CAN_ERROR_NONE)
{
/* Clear ERRI Flag */
hcan->Instance->MSR = CAN_MSR_ERRI;
/* Set the CAN state ready to be able to start again the process */
hcan->State = HAL_CAN_STATE_READY;
/* Disable interrupts: */
/* - Disable Error warning Interrupt */
/* - Disable Error passive Interrupt */
/* - Disable Bus-off Interrupt */
/* - Disable Last error code Interrupt */
/* - Disable Error Interrupt */
/* - Disable FIFO 0 message pending Interrupt */
/* - Disable FIFO 0 Overrun Interrupt */
/* - Disable FIFO 1 message pending Interrupt */
/* - Disable FIFO 1 Overrun Interrupt */
/* - Disable Transmit mailbox empty Interrupt */
__HAL_CAN_DISABLE_IT(hcan, CAN_IT_EWG |
CAN_IT_EPV |
CAN_IT_BOF |
CAN_IT_LEC |
CAN_IT_ERR |
CAN_IT_FMP0|
CAN_IT_FOV0|
CAN_IT_FMP1|
CAN_IT_FOV1|
CAN_IT_TME );
/* Call Error callback function */
HAL_CAN_ErrorCallback(hcan);
}
}
/**
* @brief Transmission complete callback in non blocking mode
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval None
*/
__weak void HAL_CAN_TxCpltCallback(CAN_HandleTypeDef* hcan)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hcan);
/* NOTE : This function Should not be modified, when the callback is needed,
the HAL_CAN_TxCpltCallback can be implemented in the user file
*/
}
/**
* @brief Transmission complete callback in non blocking mode
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval None
*/
__weak void HAL_CAN_RxCpltCallback(CAN_HandleTypeDef* hcan)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hcan);
/* NOTE : This function Should not be modified, when the callback is needed,
the HAL_CAN_RxCpltCallback can be implemented in the user file
*/
}
/**
* @brief Error CAN callback.
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval None
*/
__weak void HAL_CAN_ErrorCallback(CAN_HandleTypeDef *hcan)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hcan);
/* NOTE : This function Should not be modified, when the callback is needed,
the HAL_CAN_ErrorCallback can be implemented in the user file
*/
}
/**
* @}
*/
/** @defgroup CAN_Exported_Functions_Group3 Peripheral State and Error functions
* @brief CAN Peripheral State functions
*
@verbatim
==============================================================================
##### Peripheral State and Error functions #####
==============================================================================
[..]
This subsection provides functions allowing to :
(+) Check the CAN state.
(+) Check CAN Errors detected during interrupt process
@endverbatim
* @{
*/
/**
* @brief return the CAN state
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval HAL state
*/
HAL_CAN_StateTypeDef HAL_CAN_GetState(CAN_HandleTypeDef* hcan)
{
/* Return CAN state */
return hcan->State;
}
/**
* @brief Return the CAN error code
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval CAN Error Code
*/
uint32_t HAL_CAN_GetError(CAN_HandleTypeDef *hcan)
{
return hcan->ErrorCode;
}
/**
* @}
*/
/**
* @}
*/
/** @addtogroup CAN_Private_Functions
* @{
*/
/**
* @brief Initiates and transmits a CAN frame message.
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval HAL status
*/
static HAL_StatusTypeDef CAN_Transmit_IT(CAN_HandleTypeDef* hcan)
{
/* Disable Transmit mailbox empty Interrupt */
__HAL_CAN_DISABLE_IT(hcan, CAN_IT_TME);
if(hcan->State == HAL_CAN_STATE_BUSY_TX)
{
/* Disable interrupts: */
/* - Disable Error warning Interrupt */
/* - Disable Error passive Interrupt */
/* - Disable Bus-off Interrupt */
/* - Disable Last error code Interrupt */
/* - Disable Error Interrupt */
__HAL_CAN_DISABLE_IT(hcan, CAN_IT_EWG |
CAN_IT_EPV |
CAN_IT_BOF |
CAN_IT_LEC |
CAN_IT_ERR);
}
/* Change CAN state */
switch(hcan->State)
{
case(HAL_CAN_STATE_BUSY_TX_RX0):
hcan->State = HAL_CAN_STATE_BUSY_RX0;
break;
case(HAL_CAN_STATE_BUSY_TX_RX1):
hcan->State = HAL_CAN_STATE_BUSY_RX1;
break;
case(HAL_CAN_STATE_BUSY_TX_RX0_RX1):
hcan->State = HAL_CAN_STATE_BUSY_RX0_RX1;
break;
default: /* HAL_CAN_STATE_BUSY_TX */
hcan->State = HAL_CAN_STATE_READY;
break;
}
/* Transmission complete callback */
HAL_CAN_TxCpltCallback(hcan);
return HAL_OK;
}
/**
* @brief Receives a correct CAN frame.
* @param hcan: Pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @param FIFONumber: Specify the FIFO number
* @retval HAL status
* @retval None
*/
static HAL_StatusTypeDef CAN_Receive_IT(CAN_HandleTypeDef* hcan, uint8_t FIFONumber)
{
uint32_t tmp1 = 0U;
CanRxMsgTypeDef* pRxMsg = NULL;
/* Set RxMsg pointer */
if(FIFONumber == CAN_FIFO0)
{
pRxMsg = hcan->pRxMsg;
}
else /* FIFONumber == CAN_FIFO1 */
{
pRxMsg = hcan->pRx1Msg;
}
/* Get the Id */
pRxMsg->IDE = (uint8_t)0x04U & hcan->Instance->sFIFOMailBox[FIFONumber].RIR;
if (pRxMsg->IDE == CAN_ID_STD)
{
pRxMsg->StdId = 0x000007FFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RIR >> 21U);
}
else
{
pRxMsg->ExtId = 0x1FFFFFFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RIR >> 3U);
}
pRxMsg->RTR = (uint8_t)0x02U & hcan->Instance->sFIFOMailBox[FIFONumber].RIR;
/* Get the DLC */
pRxMsg->DLC = (uint8_t)0x0FU & hcan->Instance->sFIFOMailBox[FIFONumber].RDTR;
/* Get the FIFONumber */
pRxMsg->FIFONumber = FIFONumber;
/* Get the FMI */
pRxMsg->FMI = (uint8_t)0xFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RDTR >> 8U);
/* Get the data field */
pRxMsg->Data[0] = (uint8_t)0xFFU & hcan->Instance->sFIFOMailBox[FIFONumber].RDLR;
pRxMsg->Data[1] = (uint8_t)0xFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RDLR >> 8U);
pRxMsg->Data[2] = (uint8_t)0xFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RDLR >> 16U);
pRxMsg->Data[3] = (uint8_t)0xFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RDLR >> 24U);
pRxMsg->Data[4] = (uint8_t)0xFFU & hcan->Instance->sFIFOMailBox[FIFONumber].RDHR;
pRxMsg->Data[5] = (uint8_t)0xFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RDHR >> 8U);
pRxMsg->Data[6] = (uint8_t)0xFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RDHR >> 16U);
pRxMsg->Data[7] = (uint8_t)0xFFU & (hcan->Instance->sFIFOMailBox[FIFONumber].RDHR >> 24U);
/* Release the FIFO */
/* Release FIFO0 */
if (FIFONumber == CAN_FIFO0)
{
__HAL_CAN_FIFO_RELEASE(hcan, CAN_FIFO0);
/* Disable FIFO 0 overrun and message pending Interrupt */
__HAL_CAN_DISABLE_IT(hcan, CAN_IT_FOV0 | CAN_IT_FMP0);
}
/* Release FIFO1 */
else /* FIFONumber == CAN_FIFO1 */
{
__HAL_CAN_FIFO_RELEASE(hcan, CAN_FIFO1);
/* Disable FIFO 1 overrun and message pending Interrupt */
__HAL_CAN_DISABLE_IT(hcan, CAN_IT_FOV1 | CAN_IT_FMP1);
}
tmp1 = hcan->State;
if((tmp1 == HAL_CAN_STATE_BUSY_RX0) || (tmp1 == HAL_CAN_STATE_BUSY_RX1))
{
/* Disable interrupts: */
/* - Disable Error warning Interrupt */
/* - Disable Error passive Interrupt */
/* - Disable Bus-off Interrupt */
/* - Disable Last error code Interrupt */
/* - Disable Error Interrupt */
__HAL_CAN_DISABLE_IT(hcan, CAN_IT_EWG |
CAN_IT_EPV |
CAN_IT_BOF |
CAN_IT_LEC |
CAN_IT_ERR);
}
/* Change CAN state */
if (FIFONumber == CAN_FIFO0)
{
switch(hcan->State)
{
case(HAL_CAN_STATE_BUSY_TX_RX0):
hcan->State = HAL_CAN_STATE_BUSY_TX;
break;
case(HAL_CAN_STATE_BUSY_RX0_RX1):
hcan->State = HAL_CAN_STATE_BUSY_RX1;
break;
case(HAL_CAN_STATE_BUSY_TX_RX0_RX1):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX1;
break;
default: /* HAL_CAN_STATE_BUSY_RX0 */
hcan->State = HAL_CAN_STATE_READY;
break;
}
}
else /* FIFONumber == CAN_FIFO1 */
{
switch(hcan->State)
{
case(HAL_CAN_STATE_BUSY_TX_RX1):
hcan->State = HAL_CAN_STATE_BUSY_TX;
break;
case(HAL_CAN_STATE_BUSY_RX0_RX1):
hcan->State = HAL_CAN_STATE_BUSY_RX0;
break;
case(HAL_CAN_STATE_BUSY_TX_RX0_RX1):
hcan->State = HAL_CAN_STATE_BUSY_TX_RX0;
break;
default: /* HAL_CAN_STATE_BUSY_RX1 */
hcan->State = HAL_CAN_STATE_READY;
break;
}
}
/* Receive complete callback */
HAL_CAN_RxCpltCallback(hcan);
/* Return function status */
return HAL_OK;
}
/**
* @}
*/
#endif /* STM32F103x6) || STM32F103xB || STM32F103xE || STM32F103xG) || STM32F105xC || STM32F107xC */
#endif /* HAL_CAN_MODULE_ENABLED */
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/