From a22d9c106276bb1819e583012d7ea41b6529b318 Mon Sep 17 00:00:00 2001
From: guowenxue <guowenxue@gmail.com>
Date: Wed, 16 May 2018 08:14:05 +0800
Subject: [PATCH] add new LED key systick sample code
---
src/bare_test/4.Systick/stdlib/src/stm32f10x_can.c | 2830 +++++++++++++++++++++++++++++-----------------------------
1 files changed, 1,415 insertions(+), 1,415 deletions(-)
diff --git a/src/bare_test/stm32_key/fwlib/src/stm32f10x_can.c b/src/bare_test/4.Systick/stdlib/src/stm32f10x_can.c
similarity index 99%
copy from src/bare_test/stm32_key/fwlib/src/stm32f10x_can.c
copy to src/bare_test/4.Systick/stdlib/src/stm32f10x_can.c
index 607d692..ec8e049 100644
--- a/src/bare_test/stm32_key/fwlib/src/stm32f10x_can.c
+++ b/src/bare_test/4.Systick/stdlib/src/stm32f10x_can.c
@@ -1,1415 +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****/
+/**
+ ******************************************************************************
+ * @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****/
--
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