帮我配置一个stm32f103ret6的can驱动函数
时间: 2024-05-01 12:16:06 浏览: 24
好的,以下是一个简单的CAN驱动函数,你可以根据自己的需求进行修改:
```c
#include "stm32f10x.h"
void CAN_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
CAN_InitTypeDef CAN_InitStructure;
// 使能CAN时钟和GPIO时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);
// 配置CAN RX引脚为复用推挽输入模式
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// 配置CAN TX引脚为复用推挽输出模式
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// 初始化CAN
CAN_InitStructure.CAN_TTCM = DISABLE;
CAN_InitStructure.CAN_ABOM = DISABLE;
CAN_InitStructure.CAN_AWUM = DISABLE;
CAN_InitStructure.CAN_NART = DISABLE;
CAN_InitStructure.CAN_RFLM = DISABLE;
CAN_InitStructure.CAN_TXFP = ENABLE;
CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
CAN_InitStructure.CAN_BS1 = CAN_BS1_5tq;
CAN_InitStructure.CAN_BS2 = CAN_BS2_2tq;
CAN_InitStructure.CAN_Prescaler = 6;
CAN_Init(CAN1, &CAN_InitStructure);
// 配置CAN过滤器
CAN_FilterInitTypeDef CAN_FilterInitStructure;
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 CAN_SendData(uint8_t* data, uint8_t len)
{
CanTxMsg TxMessage;
uint16_t i;
// 填充CAN数据帧
TxMessage.StdId = 0x123;
TxMessage.ExtId = 0x01;
TxMessage.RTR = CAN_RTR_DATA;
TxMessage.IDE = CAN_ID_STD;
TxMessage.DLC = len;
for (i = 0; i < len; i++)
{
TxMessage.Data[i] = data[i];
}
// 发送CAN数据帧
while (CAN_Transmit(CAN1, &TxMessage) == CAN_TxStatus_Failed);
}
void CAN_ReceiveData(uint8_t* data, uint8_t* len)
{
CanRxMsg RxMessage;
// 接收CAN数据帧
while (CAN_MessagePending(CAN1, CAN_FIFO0) == 0);
CAN_Receive(CAN1, CAN_FIFO0, &RxMessage);
// 获取CAN数据
*len = RxMessage.DLC;
for (int i = 0; i < *len; i++)
{
data[i] = RxMessage.Data[i];
}
}
```
该函数包含了CAN的初始化、发送和接收功能。你需要根据自己的实际情况进行修改来适配你的系统。
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