diff options
Diffstat (limited to 'tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Libraries/STM32F10x_StdPeriph_Driver/src/stm32f10x_can.c')
| -rw-r--r-- | tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Libraries/STM32F10x_StdPeriph_Driver/src/stm32f10x_can.c | 1415 |
1 files changed, 1415 insertions, 0 deletions
diff --git a/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Libraries/STM32F10x_StdPeriph_Driver/src/stm32f10x_can.c b/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Libraries/STM32F10x_StdPeriph_Driver/src/stm32f10x_can.c new file mode 100644 index 0000000..ec8e049 --- /dev/null +++ b/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Libraries/STM32F10x_StdPeriph_Driver/src/stm32f10x_can.c @@ -0,0 +1,1415 @@ +/** + ****************************************************************************** + * @file stm32f10x_can.c + * @author MCD Application Team + * @version V3.5.0 + * @date 11-March-2011 + * @brief This file provides all the CAN firmware functions. + ****************************************************************************** + * @attention + * + * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS + * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE + * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY + * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING + * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE + * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. + * + * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32f10x_can.h" +#include "stm32f10x_rcc.h" + +/** @addtogroup STM32F10x_StdPeriph_Driver + * @{ + */ + +/** @defgroup CAN + * @brief CAN driver modules + * @{ + */ + +/** @defgroup CAN_Private_TypesDefinitions + * @{ + */ + +/** + * @} + */ + +/** @defgroup CAN_Private_Defines + * @{ + */ + +/* CAN Master Control Register bits */ + +#define MCR_DBF ((uint32_t)0x00010000) /* software master reset */ + +/* CAN Mailbox Transmit Request */ +#define TMIDxR_TXRQ ((uint32_t)0x00000001) /* Transmit mailbox request */ + +/* CAN Filter Master Register bits */ +#define FMR_FINIT ((uint32_t)0x00000001) /* Filter init mode */ + +/* Time out for INAK bit */ +#define INAK_TIMEOUT ((uint32_t)0x0000FFFF) +/* Time out for SLAK bit */ +#define SLAK_TIMEOUT ((uint32_t)0x0000FFFF) + + + +/* Flags in TSR register */ +#define CAN_FLAGS_TSR ((uint32_t)0x08000000) +/* Flags in RF1R register */ +#define CAN_FLAGS_RF1R ((uint32_t)0x04000000) +/* Flags in RF0R register */ +#define CAN_FLAGS_RF0R ((uint32_t)0x02000000) +/* Flags in MSR register */ +#define CAN_FLAGS_MSR ((uint32_t)0x01000000) +/* Flags in ESR register */ +#define CAN_FLAGS_ESR ((uint32_t)0x00F00000) + +/* Mailboxes definition */ +#define CAN_TXMAILBOX_0 ((uint8_t)0x00) +#define CAN_TXMAILBOX_1 ((uint8_t)0x01) +#define CAN_TXMAILBOX_2 ((uint8_t)0x02) + + + +#define CAN_MODE_MASK ((uint32_t) 0x00000003) +/** + * @} + */ + +/** @defgroup CAN_Private_Macros + * @{ + */ + +/** + * @} + */ + +/** @defgroup CAN_Private_Variables + * @{ + */ + +/** + * @} + */ + +/** @defgroup CAN_Private_FunctionPrototypes + * @{ + */ + +static ITStatus CheckITStatus(uint32_t CAN_Reg, uint32_t It_Bit); + +/** + * @} + */ + +/** @defgroup CAN_Private_Functions + * @{ + */ + +/** + * @brief Deinitializes the CAN peripheral registers to their default reset values. + * @param CANx: where x can be 1 or 2 to select the CAN peripheral. + * @retval None. + */ +void CAN_DeInit(CAN_TypeDef* CANx) +{ + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + + if (CANx == CAN1) + { + /* Enable CAN1 reset state */ + RCC_APB1PeriphResetCmd(RCC_APB1Periph_CAN1, ENABLE); + /* Release CAN1 from reset state */ + RCC_APB1PeriphResetCmd(RCC_APB1Periph_CAN1, DISABLE); + } + else + { + /* Enable CAN2 reset state */ + RCC_APB1PeriphResetCmd(RCC_APB1Periph_CAN2, ENABLE); + /* Release CAN2 from reset state */ + RCC_APB1PeriphResetCmd(RCC_APB1Periph_CAN2, DISABLE); + } +} + +/** + * @brief Initializes the CAN peripheral according to the specified + * parameters in the CAN_InitStruct. + * @param CANx: where x can be 1 or 2 to to select the CAN + * peripheral. + * @param CAN_InitStruct: pointer to a CAN_InitTypeDef structure that + * contains the configuration information for the + * CAN peripheral. + * @retval Constant indicates initialization succeed which will be + * CAN_InitStatus_Failed or CAN_InitStatus_Success. + */ +uint8_t CAN_Init(CAN_TypeDef* CANx, CAN_InitTypeDef* CAN_InitStruct) +{ + uint8_t InitStatus = CAN_InitStatus_Failed; + uint32_t wait_ack = 0x00000000; + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + assert_param(IS_FUNCTIONAL_STATE(CAN_InitStruct->CAN_TTCM)); + assert_param(IS_FUNCTIONAL_STATE(CAN_InitStruct->CAN_ABOM)); + assert_param(IS_FUNCTIONAL_STATE(CAN_InitStruct->CAN_AWUM)); + assert_param(IS_FUNCTIONAL_STATE(CAN_InitStruct->CAN_NART)); + assert_param(IS_FUNCTIONAL_STATE(CAN_InitStruct->CAN_RFLM)); + assert_param(IS_FUNCTIONAL_STATE(CAN_InitStruct->CAN_TXFP)); + assert_param(IS_CAN_MODE(CAN_InitStruct->CAN_Mode)); + assert_param(IS_CAN_SJW(CAN_InitStruct->CAN_SJW)); + assert_param(IS_CAN_BS1(CAN_InitStruct->CAN_BS1)); + assert_param(IS_CAN_BS2(CAN_InitStruct->CAN_BS2)); + assert_param(IS_CAN_PRESCALER(CAN_InitStruct->CAN_Prescaler)); + + /* Exit from sleep mode */ + CANx->MCR &= (~(uint32_t)CAN_MCR_SLEEP); + + /* Request initialisation */ + CANx->MCR |= CAN_MCR_INRQ ; + + /* Wait the acknowledge */ + while (((CANx->MSR & CAN_MSR_INAK) != CAN_MSR_INAK) && (wait_ack != INAK_TIMEOUT)) + { + wait_ack++; + } + + /* Check acknowledge */ + if ((CANx->MSR & CAN_MSR_INAK) != CAN_MSR_INAK) + { + InitStatus = CAN_InitStatus_Failed; + } + else + { + /* Set the time triggered communication mode */ + if (CAN_InitStruct->CAN_TTCM == ENABLE) + { + CANx->MCR |= CAN_MCR_TTCM; + } + else + { + CANx->MCR &= ~(uint32_t)CAN_MCR_TTCM; + } + + /* Set the automatic bus-off management */ + if (CAN_InitStruct->CAN_ABOM == ENABLE) + { + CANx->MCR |= CAN_MCR_ABOM; + } + else + { + CANx->MCR &= ~(uint32_t)CAN_MCR_ABOM; + } + + /* Set the automatic wake-up mode */ + if (CAN_InitStruct->CAN_AWUM == ENABLE) + { + CANx->MCR |= CAN_MCR_AWUM; + } + else + { + CANx->MCR &= ~(uint32_t)CAN_MCR_AWUM; + } + + /* Set the no automatic retransmission */ + if (CAN_InitStruct->CAN_NART == ENABLE) + { + CANx->MCR |= CAN_MCR_NART; + } + else + { + CANx->MCR &= ~(uint32_t)CAN_MCR_NART; + } + + /* Set the receive FIFO locked mode */ + if (CAN_InitStruct->CAN_RFLM == ENABLE) + { + CANx->MCR |= CAN_MCR_RFLM; + } + else + { + CANx->MCR &= ~(uint32_t)CAN_MCR_RFLM; + } + + /* Set the transmit FIFO priority */ + if (CAN_InitStruct->CAN_TXFP == ENABLE) + { + CANx->MCR |= CAN_MCR_TXFP; + } + else + { + CANx->MCR &= ~(uint32_t)CAN_MCR_TXFP; + } + + /* Set the bit timing register */ + CANx->BTR = (uint32_t)((uint32_t)CAN_InitStruct->CAN_Mode << 30) | \ + ((uint32_t)CAN_InitStruct->CAN_SJW << 24) | \ + ((uint32_t)CAN_InitStruct->CAN_BS1 << 16) | \ + ((uint32_t)CAN_InitStruct->CAN_BS2 << 20) | \ + ((uint32_t)CAN_InitStruct->CAN_Prescaler - 1); + + /* Request leave initialisation */ + CANx->MCR &= ~(uint32_t)CAN_MCR_INRQ; + + /* Wait the acknowledge */ + wait_ack = 0; + + while (((CANx->MSR & CAN_MSR_INAK) == CAN_MSR_INAK) && (wait_ack != INAK_TIMEOUT)) + { + wait_ack++; + } + + /* ...and check acknowledged */ + if ((CANx->MSR & CAN_MSR_INAK) == CAN_MSR_INAK) + { + InitStatus = CAN_InitStatus_Failed; + } + else + { + InitStatus = CAN_InitStatus_Success ; + } + } + + /* At this step, return the status of initialization */ + return InitStatus; +} + +/** + * @brief Initializes the CAN peripheral according to the specified + * parameters in the CAN_FilterInitStruct. + * @param CAN_FilterInitStruct: pointer to a CAN_FilterInitTypeDef + * structure that contains the configuration + * information. + * @retval None. + */ +void CAN_FilterInit(CAN_FilterInitTypeDef* CAN_FilterInitStruct) +{ + uint32_t filter_number_bit_pos = 0; + /* Check the parameters */ + assert_param(IS_CAN_FILTER_NUMBER(CAN_FilterInitStruct->CAN_FilterNumber)); + assert_param(IS_CAN_FILTER_MODE(CAN_FilterInitStruct->CAN_FilterMode)); + assert_param(IS_CAN_FILTER_SCALE(CAN_FilterInitStruct->CAN_FilterScale)); + assert_param(IS_CAN_FILTER_FIFO(CAN_FilterInitStruct->CAN_FilterFIFOAssignment)); + assert_param(IS_FUNCTIONAL_STATE(CAN_FilterInitStruct->CAN_FilterActivation)); + + filter_number_bit_pos = ((uint32_t)1) << CAN_FilterInitStruct->CAN_FilterNumber; + + /* Initialisation mode for the filter */ + CAN1->FMR |= FMR_FINIT; + + /* Filter Deactivation */ + CAN1->FA1R &= ~(uint32_t)filter_number_bit_pos; + + /* Filter Scale */ + if (CAN_FilterInitStruct->CAN_FilterScale == CAN_FilterScale_16bit) + { + /* 16-bit scale for the filter */ + CAN1->FS1R &= ~(uint32_t)filter_number_bit_pos; + + /* First 16-bit identifier and First 16-bit mask */ + /* Or First 16-bit identifier and Second 16-bit identifier */ + CAN1->sFilterRegister[CAN_FilterInitStruct->CAN_FilterNumber].FR1 = + ((0x0000FFFF & (uint32_t)CAN_FilterInitStruct->CAN_FilterMaskIdLow) << 16) | + (0x0000FFFF & (uint32_t)CAN_FilterInitStruct->CAN_FilterIdLow); + + /* Second 16-bit identifier and Second 16-bit mask */ + /* Or Third 16-bit identifier and Fourth 16-bit identifier */ + CAN1->sFilterRegister[CAN_FilterInitStruct->CAN_FilterNumber].FR2 = + ((0x0000FFFF & (uint32_t)CAN_FilterInitStruct->CAN_FilterMaskIdHigh) << 16) | + (0x0000FFFF & (uint32_t)CAN_FilterInitStruct->CAN_FilterIdHigh); + } + + if (CAN_FilterInitStruct->CAN_FilterScale == CAN_FilterScale_32bit) + { + /* 32-bit scale for the filter */ + CAN1->FS1R |= filter_number_bit_pos; + /* 32-bit identifier or First 32-bit identifier */ + CAN1->sFilterRegister[CAN_FilterInitStruct->CAN_FilterNumber].FR1 = + ((0x0000FFFF & (uint32_t)CAN_FilterInitStruct->CAN_FilterIdHigh) << 16) | + (0x0000FFFF & (uint32_t)CAN_FilterInitStruct->CAN_FilterIdLow); + /* 32-bit mask or Second 32-bit identifier */ + CAN1->sFilterRegister[CAN_FilterInitStruct->CAN_FilterNumber].FR2 = + ((0x0000FFFF & (uint32_t)CAN_FilterInitStruct->CAN_FilterMaskIdHigh) << 16) | + (0x0000FFFF & (uint32_t)CAN_FilterInitStruct->CAN_FilterMaskIdLow); + } + + /* Filter Mode */ + if (CAN_FilterInitStruct->CAN_FilterMode == CAN_FilterMode_IdMask) + { + /*Id/Mask mode for the filter*/ + CAN1->FM1R &= ~(uint32_t)filter_number_bit_pos; + } + else /* CAN_FilterInitStruct->CAN_FilterMode == CAN_FilterMode_IdList */ + { + /*Identifier list mode for the filter*/ + CAN1->FM1R |= (uint32_t)filter_number_bit_pos; + } + + /* Filter FIFO assignment */ + if (CAN_FilterInitStruct->CAN_FilterFIFOAssignment == CAN_Filter_FIFO0) + { + /* FIFO 0 assignation for the filter */ + CAN1->FFA1R &= ~(uint32_t)filter_number_bit_pos; + } + + if (CAN_FilterInitStruct->CAN_FilterFIFOAssignment == CAN_Filter_FIFO1) + { + /* FIFO 1 assignation for the filter */ + CAN1->FFA1R |= (uint32_t)filter_number_bit_pos; + } + + /* Filter activation */ + if (CAN_FilterInitStruct->CAN_FilterActivation == ENABLE) + { + CAN1->FA1R |= filter_number_bit_pos; + } + + /* Leave the initialisation mode for the filter */ + CAN1->FMR &= ~FMR_FINIT; +} + +/** + * @brief Fills each CAN_InitStruct member with its default value. + * @param CAN_InitStruct: pointer to a CAN_InitTypeDef structure which + * will be initialized. + * @retval None. + */ +void CAN_StructInit(CAN_InitTypeDef* CAN_InitStruct) +{ + /* Reset CAN init structure parameters values */ + + /* Initialize the time triggered communication mode */ + CAN_InitStruct->CAN_TTCM = DISABLE; + + /* Initialize the automatic bus-off management */ + CAN_InitStruct->CAN_ABOM = DISABLE; + + /* Initialize the automatic wake-up mode */ + CAN_InitStruct->CAN_AWUM = DISABLE; + + /* Initialize the no automatic retransmission */ + CAN_InitStruct->CAN_NART = DISABLE; + + /* Initialize the receive FIFO locked mode */ + CAN_InitStruct->CAN_RFLM = DISABLE; + + /* Initialize the transmit FIFO priority */ + CAN_InitStruct->CAN_TXFP = DISABLE; + + /* Initialize the CAN_Mode member */ + CAN_InitStruct->CAN_Mode = CAN_Mode_Normal; + + /* Initialize the CAN_SJW member */ + CAN_InitStruct->CAN_SJW = CAN_SJW_1tq; + + /* Initialize the CAN_BS1 member */ + CAN_InitStruct->CAN_BS1 = CAN_BS1_4tq; + + /* Initialize the CAN_BS2 member */ + CAN_InitStruct->CAN_BS2 = CAN_BS2_3tq; + + /* Initialize the CAN_Prescaler member */ + CAN_InitStruct->CAN_Prescaler = 1; +} + +/** + * @brief Select the start bank filter for slave CAN. + * @note This function applies only to STM32 Connectivity line devices. + * @param CAN_BankNumber: Select the start slave bank filter from 1..27. + * @retval None. + */ +void CAN_SlaveStartBank(uint8_t CAN_BankNumber) +{ + /* Check the parameters */ + assert_param(IS_CAN_BANKNUMBER(CAN_BankNumber)); + + /* Enter Initialisation mode for the filter */ + CAN1->FMR |= FMR_FINIT; + + /* Select the start slave bank */ + CAN1->FMR &= (uint32_t)0xFFFFC0F1 ; + CAN1->FMR |= (uint32_t)(CAN_BankNumber)<<8; + + /* Leave Initialisation mode for the filter */ + CAN1->FMR &= ~FMR_FINIT; +} + +/** + * @brief Enables or disables the DBG Freeze for CAN. + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @param NewState: new state of the CAN peripheral. This parameter can + * be: ENABLE or DISABLE. + * @retval None. + */ +void CAN_DBGFreeze(CAN_TypeDef* CANx, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + + if (NewState != DISABLE) + { + /* Enable Debug Freeze */ + CANx->MCR |= MCR_DBF; + } + else + { + /* Disable Debug Freeze */ + CANx->MCR &= ~MCR_DBF; + } +} + + +/** + * @brief Enables or disabes the CAN Time TriggerOperation communication mode. + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @param NewState : Mode new state , can be one of @ref FunctionalState. + * @note when enabled, Time stamp (TIME[15:0]) value is sent in the last + * two data bytes of the 8-byte message: TIME[7:0] in data byte 6 + * and TIME[15:8] in data byte 7 + * @note DLC must be programmed as 8 in order Time Stamp (2 bytes) to be + * sent over the CAN bus. + * @retval None + */ +void CAN_TTComModeCmd(CAN_TypeDef* CANx, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + if (NewState != DISABLE) + { + /* Enable the TTCM mode */ + CANx->MCR |= CAN_MCR_TTCM; + + /* Set TGT bits */ + CANx->sTxMailBox[0].TDTR |= ((uint32_t)CAN_TDT0R_TGT); + CANx->sTxMailBox[1].TDTR |= ((uint32_t)CAN_TDT1R_TGT); + CANx->sTxMailBox[2].TDTR |= ((uint32_t)CAN_TDT2R_TGT); + } + else + { + /* Disable the TTCM mode */ + CANx->MCR &= (uint32_t)(~(uint32_t)CAN_MCR_TTCM); + + /* Reset TGT bits */ + CANx->sTxMailBox[0].TDTR &= ((uint32_t)~CAN_TDT0R_TGT); + CANx->sTxMailBox[1].TDTR &= ((uint32_t)~CAN_TDT1R_TGT); + CANx->sTxMailBox[2].TDTR &= ((uint32_t)~CAN_TDT2R_TGT); + } +} +/** + * @brief Initiates the transmission of a message. + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @param TxMessage: pointer to a structure which contains CAN Id, CAN + * DLC and CAN data. + * @retval The number of the mailbox that is used for transmission + * or CAN_TxStatus_NoMailBox if there is no empty mailbox. + */ +uint8_t CAN_Transmit(CAN_TypeDef* CANx, CanTxMsg* TxMessage) +{ + uint8_t transmit_mailbox = 0; + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + assert_param(IS_CAN_IDTYPE(TxMessage->IDE)); + assert_param(IS_CAN_RTR(TxMessage->RTR)); + assert_param(IS_CAN_DLC(TxMessage->DLC)); + + /* Select one empty transmit mailbox */ + if ((CANx->TSR&CAN_TSR_TME0) == CAN_TSR_TME0) + { + transmit_mailbox = 0; + } + else if ((CANx->TSR&CAN_TSR_TME1) == CAN_TSR_TME1) + { + transmit_mailbox = 1; + } + else if ((CANx->TSR&CAN_TSR_TME2) == CAN_TSR_TME2) + { + transmit_mailbox = 2; + } + else + { + transmit_mailbox = CAN_TxStatus_NoMailBox; + } + + if (transmit_mailbox != CAN_TxStatus_NoMailBox) + { + /* Set up the Id */ + CANx->sTxMailBox[transmit_mailbox].TIR &= TMIDxR_TXRQ; + if (TxMessage->IDE == CAN_Id_Standard) + { + assert_param(IS_CAN_STDID(TxMessage->StdId)); + CANx->sTxMailBox[transmit_mailbox].TIR |= ((TxMessage->StdId << 21) | \ + TxMessage->RTR); + } + else + { + assert_param(IS_CAN_EXTID(TxMessage->ExtId)); + CANx->sTxMailBox[transmit_mailbox].TIR |= ((TxMessage->ExtId << 3) | \ + TxMessage->IDE | \ + TxMessage->RTR); + } + + /* Set up the DLC */ + TxMessage->DLC &= (uint8_t)0x0000000F; + CANx->sTxMailBox[transmit_mailbox].TDTR &= (uint32_t)0xFFFFFFF0; + CANx->sTxMailBox[transmit_mailbox].TDTR |= TxMessage->DLC; + + /* Set up the data field */ + CANx->sTxMailBox[transmit_mailbox].TDLR = (((uint32_t)TxMessage->Data[3] << 24) | + ((uint32_t)TxMessage->Data[2] << 16) | + ((uint32_t)TxMessage->Data[1] << 8) | + ((uint32_t)TxMessage->Data[0])); + CANx->sTxMailBox[transmit_mailbox].TDHR = (((uint32_t)TxMessage->Data[7] << 24) | + ((uint32_t)TxMessage->Data[6] << 16) | + ((uint32_t)TxMessage->Data[5] << 8) | + ((uint32_t)TxMessage->Data[4])); + /* Request transmission */ + CANx->sTxMailBox[transmit_mailbox].TIR |= TMIDxR_TXRQ; + } + return transmit_mailbox; +} + +/** + * @brief Checks the transmission of a message. + * @param CANx: where x can be 1 or 2 to to select the + * CAN peripheral. + * @param TransmitMailbox: the number of the mailbox that is used for + * transmission. + * @retval CAN_TxStatus_Ok if the CAN driver transmits the message, CAN_TxStatus_Failed + * in an other case. + */ +uint8_t CAN_TransmitStatus(CAN_TypeDef* CANx, uint8_t TransmitMailbox) +{ + uint32_t state = 0; + + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + assert_param(IS_CAN_TRANSMITMAILBOX(TransmitMailbox)); + + switch (TransmitMailbox) + { + case (CAN_TXMAILBOX_0): + state = CANx->TSR & (CAN_TSR_RQCP0 | CAN_TSR_TXOK0 | CAN_TSR_TME0); + break; + case (CAN_TXMAILBOX_1): + state = CANx->TSR & (CAN_TSR_RQCP1 | CAN_TSR_TXOK1 | CAN_TSR_TME1); + break; + case (CAN_TXMAILBOX_2): + state = CANx->TSR & (CAN_TSR_RQCP2 | CAN_TSR_TXOK2 | CAN_TSR_TME2); + break; + default: + state = CAN_TxStatus_Failed; + break; + } + switch (state) + { + /* transmit pending */ + case (0x0): state = CAN_TxStatus_Pending; + break; + /* transmit failed */ + case (CAN_TSR_RQCP0 | CAN_TSR_TME0): state = CAN_TxStatus_Failed; + break; + case (CAN_TSR_RQCP1 | CAN_TSR_TME1): state = CAN_TxStatus_Failed; + break; + case (CAN_TSR_RQCP2 | CAN_TSR_TME2): state = CAN_TxStatus_Failed; + break; + /* transmit succeeded */ + case (CAN_TSR_RQCP0 | CAN_TSR_TXOK0 | CAN_TSR_TME0):state = CAN_TxStatus_Ok; + break; + case (CAN_TSR_RQCP1 | CAN_TSR_TXOK1 | CAN_TSR_TME1):state = CAN_TxStatus_Ok; + break; + case (CAN_TSR_RQCP2 | CAN_TSR_TXOK2 | CAN_TSR_TME2):state = CAN_TxStatus_Ok; + break; + default: state = CAN_TxStatus_Failed; + break; + } + return (uint8_t) state; +} + +/** + * @brief Cancels a transmit request. + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @param Mailbox: Mailbox number. + * @retval None. + */ +void CAN_CancelTransmit(CAN_TypeDef* CANx, uint8_t Mailbox) +{ + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + assert_param(IS_CAN_TRANSMITMAILBOX(Mailbox)); + /* abort transmission */ + switch (Mailbox) + { + case (CAN_TXMAILBOX_0): CANx->TSR |= CAN_TSR_ABRQ0; + break; + case (CAN_TXMAILBOX_1): CANx->TSR |= CAN_TSR_ABRQ1; + break; + case (CAN_TXMAILBOX_2): CANx->TSR |= CAN_TSR_ABRQ2; + break; + default: + break; + } +} + + +/** + * @brief Receives a message. + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @param FIFONumber: Receive FIFO number, CAN_FIFO0 or CAN_FIFO1. + * @param RxMessage: pointer to a structure receive message which contains + * CAN Id, CAN DLC, CAN datas and FMI number. + * @retval None. + */ +void CAN_Receive(CAN_TypeDef* CANx, uint8_t FIFONumber, CanRxMsg* RxMessage) +{ + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + assert_param(IS_CAN_FIFO(FIFONumber)); + /* Get the Id */ + RxMessage->IDE = (uint8_t)0x04 & CANx->sFIFOMailBox[FIFONumber].RIR; + if (RxMessage->IDE == CAN_Id_Standard) + { + RxMessage->StdId = (uint32_t)0x000007FF & (CANx->sFIFOMailBox[FIFONumber].RIR >> 21); + } + else + { + RxMessage->ExtId = (uint32_t)0x1FFFFFFF & (CANx->sFIFOMailBox[FIFONumber].RIR >> 3); + } + + RxMessage->RTR = (uint8_t)0x02 & CANx->sFIFOMailBox[FIFONumber].RIR; + /* Get the DLC */ + RxMessage->DLC = (uint8_t)0x0F & CANx->sFIFOMailBox[FIFONumber].RDTR; + /* Get the FMI */ + RxMessage->FMI = (uint8_t)0xFF & (CANx->sFIFOMailBox[FIFONumber].RDTR >> 8); + /* Get the data field */ + RxMessage->Data[0] = (uint8_t)0xFF & CANx->sFIFOMailBox[FIFONumber].RDLR; + RxMessage->Data[1] = (uint8_t)0xFF & (CANx->sFIFOMailBox[FIFONumber].RDLR >> 8); + RxMessage->Data[2] = (uint8_t)0xFF & (CANx->sFIFOMailBox[FIFONumber].RDLR >> 16); + RxMessage->Data[3] = (uint8_t)0xFF & (CANx->sFIFOMailBox[FIFONumber].RDLR >> 24); + RxMessage->Data[4] = (uint8_t)0xFF & CANx->sFIFOMailBox[FIFONumber].RDHR; + RxMessage->Data[5] = (uint8_t)0xFF & (CANx->sFIFOMailBox[FIFONumber].RDHR >> 8); + RxMessage->Data[6] = (uint8_t)0xFF & (CANx->sFIFOMailBox[FIFONumber].RDHR >> 16); + RxMessage->Data[7] = (uint8_t)0xFF & (CANx->sFIFOMailBox[FIFONumber].RDHR >> 24); + /* Release the FIFO */ + /* Release FIFO0 */ + if (FIFONumber == CAN_FIFO0) + { + CANx->RF0R |= CAN_RF0R_RFOM0; + } + /* Release FIFO1 */ + else /* FIFONumber == CAN_FIFO1 */ + { + CANx->RF1R |= CAN_RF1R_RFOM1; + } +} + +/** + * @brief Releases the specified FIFO. + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @param FIFONumber: FIFO to release, CAN_FIFO0 or CAN_FIFO1. + * @retval None. + */ +void CAN_FIFORelease(CAN_TypeDef* CANx, uint8_t FIFONumber) +{ + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + assert_param(IS_CAN_FIFO(FIFONumber)); + /* Release FIFO0 */ + if (FIFONumber == CAN_FIFO0) + { + CANx->RF0R |= CAN_RF0R_RFOM0; + } + /* Release FIFO1 */ + else /* FIFONumber == CAN_FIFO1 */ + { + CANx->RF1R |= CAN_RF1R_RFOM1; + } +} + +/** + * @brief Returns the number of pending messages. + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @param FIFONumber: Receive FIFO number, CAN_FIFO0 or CAN_FIFO1. + * @retval NbMessage : which is the number of pending message. + */ +uint8_t CAN_MessagePending(CAN_TypeDef* CANx, uint8_t FIFONumber) +{ + uint8_t message_pending=0; + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + assert_param(IS_CAN_FIFO(FIFONumber)); + if (FIFONumber == CAN_FIFO0) + { + message_pending = (uint8_t)(CANx->RF0R&(uint32_t)0x03); + } + else if (FIFONumber == CAN_FIFO1) + { + message_pending = (uint8_t)(CANx->RF1R&(uint32_t)0x03); + } + else + { + message_pending = 0; + } + return message_pending; +} + + +/** + * @brief Select the CAN Operation mode. + * @param CAN_OperatingMode : CAN Operating Mode. This parameter can be one + * of @ref CAN_OperatingMode_TypeDef enumeration. + * @retval status of the requested mode which can be + * - CAN_ModeStatus_Failed CAN failed entering the specific mode + * - CAN_ModeStatus_Success CAN Succeed entering the specific mode + + */ +uint8_t CAN_OperatingModeRequest(CAN_TypeDef* CANx, uint8_t CAN_OperatingMode) +{ + uint8_t status = CAN_ModeStatus_Failed; + + /* Timeout for INAK or also for SLAK bits*/ + uint32_t timeout = INAK_TIMEOUT; + + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + assert_param(IS_CAN_OPERATING_MODE(CAN_OperatingMode)); + + if (CAN_OperatingMode == CAN_OperatingMode_Initialization) + { + /* Request initialisation */ + CANx->MCR = (uint32_t)((CANx->MCR & (uint32_t)(~(uint32_t)CAN_MCR_SLEEP)) | CAN_MCR_INRQ); + + /* Wait the acknowledge */ + while (((CANx->MSR & CAN_MODE_MASK) != CAN_MSR_INAK) && (timeout != 0)) + { + timeout--; + } + if ((CANx->MSR & CAN_MODE_MASK) != CAN_MSR_INAK) + { + status = CAN_ModeStatus_Failed; + } + else + { + status = CAN_ModeStatus_Success; + } + } + else if (CAN_OperatingMode == CAN_OperatingMode_Normal) + { + /* Request leave initialisation and sleep mode and enter Normal mode */ + CANx->MCR &= (uint32_t)(~(CAN_MCR_SLEEP|CAN_MCR_INRQ)); + + /* Wait the acknowledge */ + while (((CANx->MSR & CAN_MODE_MASK) != 0) && (timeout!=0)) + { + timeout--; + } + if ((CANx->MSR & CAN_MODE_MASK) != 0) + { + status = CAN_ModeStatus_Failed; + } + else + { + status = CAN_ModeStatus_Success; + } + } + else if (CAN_OperatingMode == CAN_OperatingMode_Sleep) + { + /* Request Sleep mode */ + CANx->MCR = (uint32_t)((CANx->MCR & (uint32_t)(~(uint32_t)CAN_MCR_INRQ)) | CAN_MCR_SLEEP); + + /* Wait the acknowledge */ + while (((CANx->MSR & CAN_MODE_MASK) != CAN_MSR_SLAK) && (timeout!=0)) + { + timeout--; + } + if ((CANx->MSR & CAN_MODE_MASK) != CAN_MSR_SLAK) + { + status = CAN_ModeStatus_Failed; + } + else + { + status = CAN_ModeStatus_Success; + } + } + else + { + status = CAN_ModeStatus_Failed; + } + + return (uint8_t) status; +} + +/** + * @brief Enters the low power mode. + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @retval status: CAN_Sleep_Ok if sleep entered, CAN_Sleep_Failed in an + * other case. + */ +uint8_t CAN_Sleep(CAN_TypeDef* CANx) +{ + uint8_t sleepstatus = CAN_Sleep_Failed; + + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + + /* Request Sleep mode */ + CANx->MCR = (((CANx->MCR) & (uint32_t)(~(uint32_t)CAN_MCR_INRQ)) | CAN_MCR_SLEEP); + + /* Sleep mode status */ + if ((CANx->MSR & (CAN_MSR_SLAK|CAN_MSR_INAK)) == CAN_MSR_SLAK) + { + /* Sleep mode not entered */ + sleepstatus = CAN_Sleep_Ok; + } + /* return sleep mode status */ + return (uint8_t)sleepstatus; +} + +/** + * @brief Wakes the CAN up. + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @retval status: CAN_WakeUp_Ok if sleep mode left, CAN_WakeUp_Failed in an + * other case. + */ +uint8_t CAN_WakeUp(CAN_TypeDef* CANx) +{ + uint32_t wait_slak = SLAK_TIMEOUT; + uint8_t wakeupstatus = CAN_WakeUp_Failed; + + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + + /* Wake up request */ + CANx->MCR &= ~(uint32_t)CAN_MCR_SLEEP; + + /* Sleep mode status */ + while(((CANx->MSR & CAN_MSR_SLAK) == CAN_MSR_SLAK)&&(wait_slak!=0x00)) + { + wait_slak--; + } + if((CANx->MSR & CAN_MSR_SLAK) != CAN_MSR_SLAK) + { + /* wake up done : Sleep mode exited */ + wakeupstatus = CAN_WakeUp_Ok; + } + /* return wakeup status */ + return (uint8_t)wakeupstatus; +} + + +/** + * @brief Returns the CANx's last error code (LEC). + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @retval CAN_ErrorCode: specifies the Error code : + * - CAN_ERRORCODE_NoErr No Error + * - CAN_ERRORCODE_StuffErr Stuff Error + * - CAN_ERRORCODE_FormErr Form Error + * - CAN_ERRORCODE_ACKErr Acknowledgment Error + * - CAN_ERRORCODE_BitRecessiveErr Bit Recessive Error + * - CAN_ERRORCODE_BitDominantErr Bit Dominant Error + * - CAN_ERRORCODE_CRCErr CRC Error + * - CAN_ERRORCODE_SoftwareSetErr Software Set Error + */ + +uint8_t CAN_GetLastErrorCode(CAN_TypeDef* CANx) +{ + uint8_t errorcode=0; + + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + + /* Get the error code*/ + errorcode = (((uint8_t)CANx->ESR) & (uint8_t)CAN_ESR_LEC); + + /* Return the error code*/ + return errorcode; +} +/** + * @brief Returns the CANx Receive Error Counter (REC). + * @note In case of an error during reception, this counter is incremented + * by 1 or by 8 depending on the error condition as defined by the CAN + * standard. After every successful reception, the counter is + * decremented by 1 or reset to 120 if its value was higher than 128. + * When the counter value exceeds 127, the CAN controller enters the + * error passive state. + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @retval CAN Receive Error Counter. + */ +uint8_t CAN_GetReceiveErrorCounter(CAN_TypeDef* CANx) +{ + uint8_t counter=0; + + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + + /* Get the Receive Error Counter*/ + counter = (uint8_t)((CANx->ESR & CAN_ESR_REC)>> 24); + + /* Return the Receive Error Counter*/ + return counter; +} + + +/** + * @brief Returns the LSB of the 9-bit CANx Transmit Error Counter(TEC). + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @retval LSB of the 9-bit CAN Transmit Error Counter. + */ +uint8_t CAN_GetLSBTransmitErrorCounter(CAN_TypeDef* CANx) +{ + uint8_t counter=0; + + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + + /* Get the LSB of the 9-bit CANx Transmit Error Counter(TEC) */ + counter = (uint8_t)((CANx->ESR & CAN_ESR_TEC)>> 16); + + /* Return the LSB of the 9-bit CANx Transmit Error Counter(TEC) */ + return counter; +} + + +/** + * @brief Enables or disables the specified CANx interrupts. + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @param CAN_IT: specifies the CAN interrupt sources to be enabled or disabled. + * This parameter can be: + * - CAN_IT_TME, + * - CAN_IT_FMP0, + * - CAN_IT_FF0, + * - CAN_IT_FOV0, + * - CAN_IT_FMP1, + * - CAN_IT_FF1, + * - CAN_IT_FOV1, + * - CAN_IT_EWG, + * - CAN_IT_EPV, + * - CAN_IT_LEC, + * - CAN_IT_ERR, + * - CAN_IT_WKU or + * - CAN_IT_SLK. + * @param NewState: new state of the CAN interrupts. + * This parameter can be: ENABLE or DISABLE. + * @retval None. + */ +void CAN_ITConfig(CAN_TypeDef* CANx, uint32_t CAN_IT, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + assert_param(IS_CAN_IT(CAN_IT)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + + if (NewState != DISABLE) + { + /* Enable the selected CANx interrupt */ + CANx->IER |= CAN_IT; + } + else + { + /* Disable the selected CANx interrupt */ + CANx->IER &= ~CAN_IT; + } +} +/** + * @brief Checks whether the specified CAN flag is set or not. + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @param CAN_FLAG: specifies the flag to check. + * This parameter can be one of the following flags: + * - CAN_FLAG_EWG + * - CAN_FLAG_EPV + * - CAN_FLAG_BOF + * - CAN_FLAG_RQCP0 + * - CAN_FLAG_RQCP1 + * - CAN_FLAG_RQCP2 + * - CAN_FLAG_FMP1 + * - CAN_FLAG_FF1 + * - CAN_FLAG_FOV1 + * - CAN_FLAG_FMP0 + * - CAN_FLAG_FF0 + * - CAN_FLAG_FOV0 + * - CAN_FLAG_WKU + * - CAN_FLAG_SLAK + * - CAN_FLAG_LEC + * @retval The new state of CAN_FLAG (SET or RESET). + */ +FlagStatus CAN_GetFlagStatus(CAN_TypeDef* CANx, uint32_t CAN_FLAG) +{ + FlagStatus bitstatus = RESET; + + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + assert_param(IS_CAN_GET_FLAG(CAN_FLAG)); + + + if((CAN_FLAG & CAN_FLAGS_ESR) != (uint32_t)RESET) + { + /* Check the status of the specified CAN flag */ + if ((CANx->ESR & (CAN_FLAG & 0x000FFFFF)) != (uint32_t)RESET) + { + /* CAN_FLAG is set */ + bitstatus = SET; + } + else + { + /* CAN_FLAG is reset */ + bitstatus = RESET; + } + } + else if((CAN_FLAG & CAN_FLAGS_MSR) != (uint32_t)RESET) + { + /* Check the status of the specified CAN flag */ + if ((CANx->MSR & (CAN_FLAG & 0x000FFFFF)) != (uint32_t)RESET) + { + /* CAN_FLAG is set */ + bitstatus = SET; + } + else + { + /* CAN_FLAG is reset */ + bitstatus = RESET; + } + } + else if((CAN_FLAG & CAN_FLAGS_TSR) != (uint32_t)RESET) + { + /* Check the status of the specified CAN flag */ + if ((CANx->TSR & (CAN_FLAG & 0x000FFFFF)) != (uint32_t)RESET) + { + /* CAN_FLAG is set */ + bitstatus = SET; + } + else + { + /* CAN_FLAG is reset */ + bitstatus = RESET; + } + } + else if((CAN_FLAG & CAN_FLAGS_RF0R) != (uint32_t)RESET) + { + /* Check the status of the specified CAN flag */ + if ((CANx->RF0R & (CAN_FLAG & 0x000FFFFF)) != (uint32_t)RESET) + { + /* CAN_FLAG is set */ + bitstatus = SET; + } + else + { + /* CAN_FLAG is reset */ + bitstatus = RESET; + } + } + else /* If(CAN_FLAG & CAN_FLAGS_RF1R != (uint32_t)RESET) */ + { + /* Check the status of the specified CAN flag */ + if ((uint32_t)(CANx->RF1R & (CAN_FLAG & 0x000FFFFF)) != (uint32_t)RESET) + { + /* CAN_FLAG is set */ + bitstatus = SET; + } + else + { + /* CAN_FLAG is reset */ + bitstatus = RESET; + } + } + /* Return the CAN_FLAG status */ + return bitstatus; +} + +/** + * @brief Clears the CAN's pending flags. + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @param CAN_FLAG: specifies the flag to clear. + * This parameter can be one of the following flags: + * - CAN_FLAG_RQCP0 + * - CAN_FLAG_RQCP1 + * - CAN_FLAG_RQCP2 + * - CAN_FLAG_FF1 + * - CAN_FLAG_FOV1 + * - CAN_FLAG_FF0 + * - CAN_FLAG_FOV0 + * - CAN_FLAG_WKU + * - CAN_FLAG_SLAK + * - CAN_FLAG_LEC + * @retval None. + */ +void CAN_ClearFlag(CAN_TypeDef* CANx, uint32_t CAN_FLAG) +{ + uint32_t flagtmp=0; + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + assert_param(IS_CAN_CLEAR_FLAG(CAN_FLAG)); + + if (CAN_FLAG == CAN_FLAG_LEC) /* ESR register */ + { + /* Clear the selected CAN flags */ + CANx->ESR = (uint32_t)RESET; + } + else /* MSR or TSR or RF0R or RF1R */ + { + flagtmp = CAN_FLAG & 0x000FFFFF; + + if ((CAN_FLAG & CAN_FLAGS_RF0R)!=(uint32_t)RESET) + { + /* Receive Flags */ + CANx->RF0R = (uint32_t)(flagtmp); + } + else if ((CAN_FLAG & CAN_FLAGS_RF1R)!=(uint32_t)RESET) + { + /* Receive Flags */ + CANx->RF1R = (uint32_t)(flagtmp); + } + else if ((CAN_FLAG & CAN_FLAGS_TSR)!=(uint32_t)RESET) + { + /* Transmit Flags */ + CANx->TSR = (uint32_t)(flagtmp); + } + else /* If((CAN_FLAG & CAN_FLAGS_MSR)!=(uint32_t)RESET) */ + { + /* Operating mode Flags */ + CANx->MSR = (uint32_t)(flagtmp); + } + } +} + +/** + * @brief Checks whether the specified CANx interrupt has occurred or not. + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @param CAN_IT: specifies the CAN interrupt source to check. + * This parameter can be one of the following flags: + * - CAN_IT_TME + * - CAN_IT_FMP0 + * - CAN_IT_FF0 + * - CAN_IT_FOV0 + * - CAN_IT_FMP1 + * - CAN_IT_FF1 + * - CAN_IT_FOV1 + * - CAN_IT_WKU + * - CAN_IT_SLK + * - CAN_IT_EWG + * - CAN_IT_EPV + * - CAN_IT_BOF + * - CAN_IT_LEC + * - CAN_IT_ERR + * @retval The current state of CAN_IT (SET or RESET). + */ +ITStatus CAN_GetITStatus(CAN_TypeDef* CANx, uint32_t CAN_IT) +{ + ITStatus itstatus = RESET; + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + assert_param(IS_CAN_IT(CAN_IT)); + + /* check the enable interrupt bit */ + if((CANx->IER & CAN_IT) != RESET) + { + /* in case the Interrupt is enabled, .... */ + switch (CAN_IT) + { + case CAN_IT_TME: + /* Check CAN_TSR_RQCPx bits */ + itstatus = CheckITStatus(CANx->TSR, CAN_TSR_RQCP0|CAN_TSR_RQCP1|CAN_TSR_RQCP2); + break; + case CAN_IT_FMP0: + /* Check CAN_RF0R_FMP0 bit */ + itstatus = CheckITStatus(CANx->RF0R, CAN_RF0R_FMP0); + break; + case CAN_IT_FF0: + /* Check CAN_RF0R_FULL0 bit */ + itstatus = CheckITStatus(CANx->RF0R, CAN_RF0R_FULL0); + break; + case CAN_IT_FOV0: + /* Check CAN_RF0R_FOVR0 bit */ + itstatus = CheckITStatus(CANx->RF0R, CAN_RF0R_FOVR0); + break; + case CAN_IT_FMP1: + /* Check CAN_RF1R_FMP1 bit */ + itstatus = CheckITStatus(CANx->RF1R, CAN_RF1R_FMP1); + break; + case CAN_IT_FF1: + /* Check CAN_RF1R_FULL1 bit */ + itstatus = CheckITStatus(CANx->RF1R, CAN_RF1R_FULL1); + break; + case CAN_IT_FOV1: + /* Check CAN_RF1R_FOVR1 bit */ + itstatus = CheckITStatus(CANx->RF1R, CAN_RF1R_FOVR1); + break; + case CAN_IT_WKU: + /* Check CAN_MSR_WKUI bit */ + itstatus = CheckITStatus(CANx->MSR, CAN_MSR_WKUI); + break; + case CAN_IT_SLK: + /* Check CAN_MSR_SLAKI bit */ + itstatus = CheckITStatus(CANx->MSR, CAN_MSR_SLAKI); + break; + case CAN_IT_EWG: + /* Check CAN_ESR_EWGF bit */ + itstatus = CheckITStatus(CANx->ESR, CAN_ESR_EWGF); + break; + case CAN_IT_EPV: + /* Check CAN_ESR_EPVF bit */ + itstatus = CheckITStatus(CANx->ESR, CAN_ESR_EPVF); + break; + case CAN_IT_BOF: + /* Check CAN_ESR_BOFF bit */ + itstatus = CheckITStatus(CANx->ESR, CAN_ESR_BOFF); + break; + case CAN_IT_LEC: + /* Check CAN_ESR_LEC bit */ + itstatus = CheckITStatus(CANx->ESR, CAN_ESR_LEC); + break; + case CAN_IT_ERR: + /* Check CAN_MSR_ERRI bit */ + itstatus = CheckITStatus(CANx->MSR, CAN_MSR_ERRI); + break; + default : + /* in case of error, return RESET */ + itstatus = RESET; + break; + } + } + else + { + /* in case the Interrupt is not enabled, return RESET */ + itstatus = RESET; + } + + /* Return the CAN_IT status */ + return itstatus; +} + +/** + * @brief Clears the CANx's interrupt pending bits. + * @param CANx: where x can be 1 or 2 to to select the CAN peripheral. + * @param CAN_IT: specifies the interrupt pending bit to clear. + * - CAN_IT_TME + * - CAN_IT_FF0 + * - CAN_IT_FOV0 + * - CAN_IT_FF1 + * - CAN_IT_FOV1 + * - CAN_IT_WKU + * - CAN_IT_SLK + * - CAN_IT_EWG + * - CAN_IT_EPV + * - CAN_IT_BOF + * - CAN_IT_LEC + * - CAN_IT_ERR + * @retval None. + */ +void CAN_ClearITPendingBit(CAN_TypeDef* CANx, uint32_t CAN_IT) +{ + /* Check the parameters */ + assert_param(IS_CAN_ALL_PERIPH(CANx)); + assert_param(IS_CAN_CLEAR_IT(CAN_IT)); + + switch (CAN_IT) + { + case CAN_IT_TME: + /* Clear CAN_TSR_RQCPx (rc_w1)*/ + CANx->TSR = CAN_TSR_RQCP0|CAN_TSR_RQCP1|CAN_TSR_RQCP2; + break; + case CAN_IT_FF0: + /* Clear CAN_RF0R_FULL0 (rc_w1)*/ + CANx->RF0R = CAN_RF0R_FULL0; + break; + case CAN_IT_FOV0: + /* Clear CAN_RF0R_FOVR0 (rc_w1)*/ + CANx->RF0R = CAN_RF0R_FOVR0; + break; + case CAN_IT_FF1: + /* Clear CAN_RF1R_FULL1 (rc_w1)*/ + CANx->RF1R = CAN_RF1R_FULL1; + break; + case CAN_IT_FOV1: + /* Clear CAN_RF1R_FOVR1 (rc_w1)*/ + CANx->RF1R = CAN_RF1R_FOVR1; + break; + case CAN_IT_WKU: + /* Clear CAN_MSR_WKUI (rc_w1)*/ + CANx->MSR = CAN_MSR_WKUI; + break; + case CAN_IT_SLK: + /* Clear CAN_MSR_SLAKI (rc_w1)*/ + CANx->MSR = CAN_MSR_SLAKI; + break; + case CAN_IT_EWG: + /* Clear CAN_MSR_ERRI (rc_w1) */ + CANx->MSR = CAN_MSR_ERRI; + /* Note : the corresponding Flag is cleared by hardware depending + of the CAN Bus status*/ + break; + case CAN_IT_EPV: + /* Clear CAN_MSR_ERRI (rc_w1) */ + CANx->MSR = CAN_MSR_ERRI; + /* Note : the corresponding Flag is cleared by hardware depending + of the CAN Bus status*/ + break; + case CAN_IT_BOF: + /* Clear CAN_MSR_ERRI (rc_w1) */ + CANx->MSR = CAN_MSR_ERRI; + /* Note : the corresponding Flag is cleared by hardware depending + of the CAN Bus status*/ + break; + case CAN_IT_LEC: + /* Clear LEC bits */ + CANx->ESR = RESET; + /* Clear CAN_MSR_ERRI (rc_w1) */ + CANx->MSR = CAN_MSR_ERRI; + break; + case CAN_IT_ERR: + /*Clear LEC bits */ + CANx->ESR = RESET; + /* Clear CAN_MSR_ERRI (rc_w1) */ + CANx->MSR = CAN_MSR_ERRI; + /* Note : BOFF, EPVF and EWGF Flags are cleared by hardware depending + of the CAN Bus status*/ + break; + default : + break; + } +} + +/** + * @brief Checks whether the CAN interrupt has occurred or not. + * @param CAN_Reg: specifies the CAN interrupt register to check. + * @param It_Bit: specifies the interrupt source bit to check. + * @retval The new state of the CAN Interrupt (SET or RESET). + */ +static ITStatus CheckITStatus(uint32_t CAN_Reg, uint32_t It_Bit) +{ + ITStatus pendingbitstatus = RESET; + + if ((CAN_Reg & It_Bit) != (uint32_t)RESET) + { + /* CAN_IT is set */ + pendingbitstatus = SET; + } + else + { + /* CAN_IT is reset */ + pendingbitstatus = RESET; + } + return pendingbitstatus; +} + + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |