msts/Core/Src/can.c

/* USER CODE BEGIN Header */
/**
 ******************************************************************************
 * @file    can.c
 * @brief   This file provides code for the configuration
 *          of the CAN instances.
 ******************************************************************************
 * @attention
 *
 * Copyright (c) 2024 STMicroelectronics.
 * All rights reserved.
 *
 * This software is licensed under terms that can be found in the LICENSE file
 * in the root directory of this software component.
 * If no LICENSE file comes with this software, it is provided AS-IS.
 *
 ******************************************************************************
 */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "can.h"

/* USER CODE BEGIN 0 */
void MX_CAN1_Filer(void)
{
    CAN_FilterTypeDef CAN1_FilerConf;
    CAN1_FilerConf.FilterIdHigh         = 0; // 过滤掉不是发送给本机的数据帧//32位ID
    CAN1_FilerConf.FilterIdLow          = 0; // 确保收到的是标准数据帧
    CAN1_FilerConf.FilterMaskIdHigh     = 0; // 32位MASK
    CAN1_FilerConf.FilterMaskIdLow      = 0; // 0xFFFF;
    CAN1_FilerConf.FilterFIFOAssignment = CAN_FILTER_FIFO0;      // 过滤器0关联到FIFO0
    CAN1_FilerConf.FilterBank           = 0;                     // 过滤器0
    CAN1_FilerConf.FilterMode           = CAN_FILTERMODE_IDMASK; // 屏蔽位模式
    CAN1_FilerConf.FilterScale          = CAN_FILTERSCALE_32BIT;
    CAN1_FilerConf.FilterActivation     = ENABLE;
    CAN1_FilerConf.SlaveStartFilterBank = 14;

    if (HAL_CAN_ConfigFilter(&hcan, &CAN1_FilerConf) != HAL_OK)
    {
        Error_Handler();
    }
}
/* USER CODE END 0 */

CAN_HandleTypeDef hcan;

/* CAN init function */
void MX_CAN_Init(void)
{

    /* USER CODE BEGIN CAN_Init 0 */

    /* USER CODE END CAN_Init 0 */

    /* USER CODE BEGIN CAN_Init 1 */

    /* USER CODE END CAN_Init 1 */
    hcan.Instance                  = CAN1;
    hcan.Init.Prescaler            = 18;
    hcan.Init.Mode                 = CAN_MODE_NORMAL;
    hcan.Init.SyncJumpWidth        = CAN_SJW_1TQ;
    hcan.Init.TimeSeg1             = CAN_BS1_13TQ;
    hcan.Init.TimeSeg2             = CAN_BS2_2TQ;
    hcan.Init.TimeTriggeredMode    = DISABLE;
    hcan.Init.AutoBusOff           = ENABLE;
    hcan.Init.AutoWakeUp           = DISABLE;
    hcan.Init.AutoRetransmission   = DISABLE;
    hcan.Init.ReceiveFifoLocked    = DISABLE;
    hcan.Init.TransmitFifoPriority = DISABLE;
    if (HAL_CAN_Init(&hcan) != HAL_OK)
    {
        Error_Handler();
    }
    /* USER CODE BEGIN CAN_Init 2 */
    MX_CAN1_Filer();
    if (HAL_CAN_Start(&hcan) != HAL_OK)
    {
        Error_Handler();
    }
    if (HAL_CAN_ActivateNotification(&hcan, CAN_IT_RX_FIFO0_MSG_PENDING) != HAL_OK)
    {
        Error_Handler();
    }
    /* USER CODE END CAN_Init 2 */
}

void HAL_CAN_MspInit(CAN_HandleTypeDef *canHandle)
{

    GPIO_InitTypeDef GPIO_InitStruct = {0};
    if (canHandle->Instance == CAN1)
    {
        /* USER CODE BEGIN CAN1_MspInit 0 */

        /* USER CODE END CAN1_MspInit 0 */
        /* CAN1 clock enable */
        __HAL_RCC_CAN1_CLK_ENABLE();

        __HAL_RCC_GPIOB_CLK_ENABLE();
        /**CAN GPIO Configuration
        PB8     ------> CAN_RX
        PB9     ------> CAN_TX
        */
        GPIO_InitStruct.Pin  = GPIO_PIN_8;
        GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
        GPIO_InitStruct.Pull = GPIO_PULLUP;
        HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

        GPIO_InitStruct.Pin   = GPIO_PIN_9;
        GPIO_InitStruct.Mode  = GPIO_MODE_AF_PP;
        GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
        HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

        __HAL_AFIO_REMAP_CAN1_2();

        /* CAN1 interrupt Init */
        HAL_NVIC_SetPriority(USB_HP_CAN1_TX_IRQn, 0, 0);
        HAL_NVIC_EnableIRQ(USB_HP_CAN1_TX_IRQn);
        HAL_NVIC_SetPriority(USB_LP_CAN1_RX0_IRQn, 0, 0);
        HAL_NVIC_EnableIRQ(USB_LP_CAN1_RX0_IRQn);
        /* USER CODE BEGIN CAN1_MspInit 1 */

        /* USER CODE END CAN1_MspInit 1 */
    }
}

void HAL_CAN_MspDeInit(CAN_HandleTypeDef *canHandle)
{

    if (canHandle->Instance == CAN1)
    {
        /* USER CODE BEGIN CAN1_MspDeInit 0 */

        /* USER CODE END CAN1_MspDeInit 0 */
        /* Peripheral clock disable */
        __HAL_RCC_CAN1_CLK_DISABLE();

        /**CAN GPIO Configuration
        PB8     ------> CAN_RX
        PB9     ------> CAN_TX
        */
        HAL_GPIO_DeInit(GPIOB, GPIO_PIN_8 | GPIO_PIN_9);

        /* CAN1 interrupt Deinit */
        /* USER CODE BEGIN CAN1:USB_HP_CAN1_TX_IRQn disable */
        /**
         * Uncomment the line below to disable the "USB_HP_CAN1_TX_IRQn" interrupt
         * Be aware, disabling shared interrupt may affect other IPs
         */
        /* HAL_NVIC_DisableIRQ(USB_HP_CAN1_TX_IRQn); */
        /* USER CODE END CAN1:USB_HP_CAN1_TX_IRQn disable */

        /* USER CODE BEGIN CAN1:USB_LP_CAN1_RX0_IRQn disable */
        /**
         * Uncomment the line below to disable the "USB_LP_CAN1_RX0_IRQn" interrupt
         * Be aware, disabling shared interrupt may affect other IPs
         */
        /* HAL_NVIC_DisableIRQ(USB_LP_CAN1_RX0_IRQn); */
        /* USER CODE END CAN1:USB_LP_CAN1_RX0_IRQn disable */

        /* USER CODE BEGIN CAN1_MspDeInit 1 */

        /* USER CODE END CAN1_MspDeInit 1 */
    }
}

/* USER CODE BEGIN 1 */

/* USER CODE END 1 */