keil 5 can总线发送传输的数据为 3 个字节0x04 0x23 0x27代码

以下是用Keil 5发送CAN总线数据的示例代码，可以根据需要修改数据内容和ID等参数：

#include <stdio.h>
#include <stdlib.h>
#include "stm32f4xx.h"
#include "stm32f4xx_can.h"
#include "stm32f4xx_rcc.h"

#define CAN_ID      0x123
#define CAN_DATA0   0x04
#define CAN_DATA1   0x23
#define CAN_DATA2   0x27

void CAN_Config(void);

int main(void)
{
    CAN_Config();

    // Configure the CAN message
    CAN_InitTypeDef  can_init;
    can_init.CAN_TTCM = DISABLE;
    can_init.CAN_ABOM = DISABLE;
    can_init.CAN_AWUM = DISABLE;
    can_init.CAN_NART = DISABLE;
    can_init.CAN_RFLM = DISABLE;
    can_init.CAN_TXFP = DISABLE;
    can_init.CAN_Mode = CAN_Mode_Normal;
    can_init.CAN_SJW = CAN_SJW_1tq;
    can_init.CAN_BS1 = CAN_BS1_9tq;
    can_init.CAN_BS2 = CAN_BS2_4tq;
    can_init.CAN_Prescaler = 2;
    CAN_Init(CAN1, &can_init);

    // Configure the CAN message filter
    CAN_FilterInitTypeDef can_filter;
    can_filter.CAN_FilterNumber = 0;
    can_filter.CAN_FilterMode = CAN_FilterMode_IdMask;
    can_filter.CAN_FilterScale = CAN_FilterScale_32bit;
    can_filter.CAN_FilterIdHigh = (CAN_ID << 5);
    can_filter.CAN_FilterIdLow = 0x0000;
    can_filter.CAN_FilterMaskIdHigh = 0xFFFF;
    can_filter.CAN_FilterMaskIdLow = 0xFFFF;
    can_filter.CAN_FilterFIFOAssignment = 0;
    can_filter.CAN_FilterActivation = ENABLE;
    CAN_FilterInit(&can_filter);

    // Create the CAN message
    CanTxMsg can_tx_msg;
    can_tx_msg.StdId = CAN_ID;
    can_tx_msg.ExtId = 0x00;
    can_tx_msg.RTR = CAN_RTR_DATA;
    can_tx_msg.IDE = CAN_ID_STD;
    can_tx_msg.DLC = 3;
    can_tx_msg.Data[0] = CAN_DATA0;
    can_tx_msg.Data[1] = CAN_DATA1;
    can_tx_msg.Data[2] = CAN_DATA2;

    // Send the CAN message
    while (CAN_Transmit(CAN1, &can_tx_msg) == CAN_TxStatus_NoMailBox);
    printf("CAN message sent\n");

    while (1);
}

void CAN_Config(void)
{
    GPIO_InitTypeDef gpio_init;
    CAN_InitTypeDef can_init;
    NVIC_InitTypeDef nvic_init;

    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);

    gpio_init.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9;
    gpio_init.GPIO_Mode = GPIO_Mode_AF;
    gpio_init.GPIO_Speed = GPIO_Speed_50MHz;
    gpio_init.GPIO_OType = GPIO_OType_PP;
    gpio_init.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOB, &gpio_init);
    GPIO_PinAFConfig(GPIOB, GPIO_PinSource8, GPIO_AF_CAN1);
    GPIO_PinAFConfig(GPIOB, GPIO_PinSource9, GPIO_AF_CAN1);

    can_init.CAN_TTCM = DISABLE;
    can_init.CAN_ABOM = DISABLE;
    can_init.CAN_AWUM = DISABLE;
    can_init.CAN_NART = DISABLE;
    can_init.CAN_RFLM = DISABLE;
    can_init.CAN_TXFP = DISABLE;
    can_init.CAN_Mode = CAN_Mode_Normal;
    can_init.CAN_SJW = CAN_SJW_1tq;
    can_init.CAN_BS1 = CAN_BS1_9tq;
    can_init.CAN_BS2 = CAN_BS2_4tq;
    can_init.CAN_Prescaler = 2;
    CAN_Init(CAN1, &can_init);

    nvic_init.NVIC_IRQChannel = CAN1_RX0_IRQn;
    nvic_init.NVIC_IRQChannelPreemptionPriority = 0;
    nvic_init.NVIC_IRQChannelSubPriority = 0;
    nvic_init.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&nvic_init);

    CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE);
}

注意，这里的代码使用的是STM32F4xx系列的单片机，如果使用其他型号的单片机需要根据具体情况修改代码。另外，还需要在Keil 5中添加相应的库文件和编译配置。