树莓派C++串口通信的代码
时间: 2023-10-07 10:11:29 浏览: 82
下面是一份树莓派C语言串口通信的示例代码:
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <termios.h>
#include <unistd.h>
int main()
{
int fd;
struct termios options;
char buffer[256];
fd = open("/dev/ttyAMA0", O_RDWR | O_NOCTTY | O_NDELAY);
if (fd == -1) {
perror("open");
return -1;
}
fcntl(fd, F_SETFL, 0);
tcgetattr(fd, &options);
cfsetispeed(&options, B9600);
cfsetospeed(&options, B9600);
options.c_cflag |= (CLOCAL | CREAD);
options.c_cflag &= ~PARENB;
options.c_cflag &= ~CSTOPB;
options.c_cflag &= ~CSIZE;
options.c_cflag |= CS8;
options.c_cc[VMIN] = 1;
options.c_cc[VTIME] = 0;
tcsetattr(fd, TCSANOW, &options);
while (1) {
int n = read(fd, buffer, sizeof(buffer));
if (n > 0) {
buffer[n] = '\0';
printf("Received: %s", buffer);
}
}
close(fd);
return 0;
}
```
这段代码打开了树莓派的串口设备文件`/dev/ttyAMA0`,并设置了串口的波特率为9600,数据位为8位,无校验位和1位停止位。然后进入一个循环,不断读取串口数据并打印出来,直到程序被中断或串口关闭。
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