基于Kvaser完成Can通讯代码
时间: 2024-05-14 11:14:22 浏览: 152
C#【通讯篇】CAN总线通道连接+Kvaser驱动
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由于Kvaser是一种Can总线接口设备,因此可以使用Kvaser提供的API来完成Can通讯代码。以下是一个基本的Can通讯代码示例,使用Kvaser的CANlib库:
```c
#include "canlib.h"
#include <stdio.h>
int main(void)
{
canHandle hnd;
canStatus stat;
unsigned int canMsgId;
unsigned char canMsgData[8];
int i;
// 打开Can总线通讯
hnd = canOpenChannel(0, canOPEN_ACCEPT_VIRTUAL);
if (hnd < 0) {
fprintf(stderr, "canOpenChannel() failed with error %d\n", hnd);
return 1;
}
// 设置Can总线通讯参数
stat = canSetBusParams(hnd, canBITRATE_500K, 0, 0, 0, 0, 0);
if (stat != canOK) {
fprintf(stderr, "canSetBusParams() failed with error %d\n", stat);
canClose(hnd);
return 1;
}
// 启动Can总线通讯
stat = canBusOn(hnd);
if (stat != canOK) {
fprintf(stderr, "canBusOn() failed with error %d\n", stat);
canClose(hnd);
return 1;
}
// 发送Can数据帧
canMsgId = 0x123;
canMsgData[0] = 0x01;
canMsgData[1] = 0x02;
canMsgData[2] = 0x03;
canMsgData[3] = 0x04;
canMsgData[4] = 0x05;
canMsgData[5] = 0x06;
canMsgData[6] = 0x07;
canMsgData[7] = 0x08;
stat = canWrite(hnd, canMsgId, canMsgData, 8, canMSG_STD);
if (stat != canOK) {
fprintf(stderr, "canWrite() failed with error %d\n", stat);
canBusOff(hnd);
canClose(hnd);
return 1;
}
// 接收Can数据帧
while (1) {
stat = canRead(hnd, &canMsgId, canMsgData, NULL, NULL, canMSG_STD);
if (stat == canOK) {
printf("Received message with ID 0x%lx and data:", canMsgId);
for (i = 0; i < 8; i++) {
printf(" %02x", canMsgData[i]);
}
printf("\n");
} else if (stat != canERR_NOMSG) {
fprintf(stderr, "canRead() failed with error %d\n", stat);
canBusOff(hnd);
canClose(hnd);
return 1;
}
}
// 关闭Can总线通讯
canBusOff(hnd);
canClose(hnd);
return 0;
}
```
该示例代码包括以下步骤:
1. 打开Can总线通讯。
2. 设置Can总线通讯参数。
3. 启动Can总线通讯。
4. 发送Can数据帧。
5. 接收Can数据帧。
6. 关闭Can总线通讯。
在实际应用中,需要根据具体的Can总线设备和应用场景来选择合适的Can通讯库和参数。
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