stm32 mcp2551驱动程序

以下是基于STM32的MCP2551驱动程序的示例代码，供您参考：

#include "stm32f10x.h"
#include "stm32f10x_can.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"

#define CANx                        CAN1
#define CAN_CLK                     RCC_APB1Periph_CAN1
#define CAN_RX_PIN                  GPIO_Pin_8
#define CAN_TX_PIN                  GPIO_Pin_9
#define CAN_GPIO_PORT               GPIOB
#define CAN_GPIO_CLK                RCC_APB2Periph_GPIOB
#define CAN_AF_PORT                 GPIO_AF_CAN1

void init_CAN_GPIO(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(CAN_GPIO_CLK, ENABLE);

    // Configure CAN pin: RX
    GPIO_InitStructure.GPIO_Pin = CAN_RX_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(CAN_GPIO_PORT, &GPIO_InitStructure);

    // Configure CAN pin: TX
    GPIO_InitStructure.GPIO_Pin = CAN_TX_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(CAN_GPIO_PORT, &GPIO_InitStructure);

    // Connect CAN pins to AF
    GPIO_PinAFConfig(CAN_GPIO_PORT, GPIO_PinSource8, CAN_AF_PORT);
    GPIO_PinAFConfig(CAN_GPIO_PORT, GPIO_PinSource9, CAN_AF_PORT);
}

void init_CAN(void)
{
    CAN_InitTypeDef CAN_InitStructure;
    CAN_FilterInitTypeDef CAN_FilterInitStructure;

    // Enable CAN clock
    RCC_APB1PeriphClockCmd(CAN_CLK, ENABLE);

    // Initialize CAN
    CAN_StructInit(&CAN_InitStructure);
    CAN_InitStructure.CAN_TTCM = DISABLE;
    CAN_InitStructure.CAN_ABOM = DISABLE;
    CAN_InitStructure.CAN_AWUM = DISABLE;
    CAN_InitStructure.CAN_NART = ENABLE;
    CAN_InitStructure.CAN_RFLM = DISABLE;
    CAN_InitStructure.CAN_TXFP = DISABLE;
    CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
    CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
    CAN_InitStructure.CAN_BS1 = CAN_BS1_4tq;
    CAN_InitStructure.CAN_BS2 = CAN_BS2_3tq;
    CAN_InitStructure.CAN_Prescaler = 4;
    CAN_Init(CANx, &CAN_InitStructure);

    // Configure CAN filter
    CAN_FilterInitStructure.CAN_FilterNumber = 0;
    CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
    CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;
    CAN_FilterInitStructure.CAN_FilterIdHigh = 0x0000;
    CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000;
    CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000;
    CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000;
    CAN_FilterInitStructure.CAN_FilterFIFOAssignment = 0;
    CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
    CAN_FilterInit(&CAN_FilterInitStructure);
}

void send_CAN_message(CanTxMsg *tx_message)
{
    uint8_t mailbox_number;

    mailbox_number = CAN_Transmit(CANx, tx_message);

    while (CAN_TransmitStatus(CANx, mailbox_number) != CAN_TxStatus_Ok);
}

int main(void)
{
    CanTxMsg tx_message;

    // Initialize GPIO pins
    init_CAN_GPIO();

    // Initialize CAN
    init_CAN();

    // Prepare CAN message to be sent
    tx_message.StdId = 0x123;
    tx_message.IDE = CAN_Id_Standard;
    tx_message.RTR = CAN_RTR_Data;
    tx_message.DLC = 1;
    tx_message.Data[0] = 0x55;

    // Send CAN message
    send_CAN_message(&tx_message);

    while (1);
}