用C写一个给串口间隔1秒发数据并接收串口回包的demo
时间: 2024-05-11 19:15:27 浏览: 69
可以参考下面的示例代码:
```
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
int open_serial_port(const char* portname, speed_t baudrate) {
int fd = open(portname, O_RDWR | O_NOCTTY);
if (fd == -1) {
perror("open_serial_port");
return -1;
}
struct termios options;
memset(&options, 0, sizeof(options));
cfsetispeed(&options, baudrate);
cfsetospeed(&options, baudrate);
options.c_cflag |= (CLOCAL | CREAD | CS8);
options.c_cflag &= ~(PARENB | PARODD);
options.c_cflag &= ~CSTOPB;
options.c_cflag &= ~CRTSCTS;
options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
options.c_iflag &= ~(INPCK | ISTRIP | IXON | IXOFF | IXANY);
options.c_oflag &= ~(OPOST);
options.c_cc[VMIN] = 0;
options.c_cc[VTIME] = 10; // 1 second timeout
if (tcsetattr(fd, TCSANOW, &options) == -1) {
perror("tcsetattr");
close(fd);
return -1;
}
return fd;
}
int main(int argc, char* argv[]) {
if (argc != 2) {
fprintf(stderr, "Usage: %s <serial port>\n", argv[0]);
return 1;
}
int fd = open_serial_port(argv[1], B9600);
if (fd == -1) {
return 1;
}
while (1) {
int n = write(fd, "Hello", 5);
if (n == -1) {
perror("write");
break;
}
char buf[256];
n = read(fd, buf, sizeof(buf));
if (n == -1) {
perror("read");
break;
}
buf[n] = '\0';
printf("Received: %s\n", buf);
sleep(1);
}
close(fd);
return 0;
}
```
注意:此示例代码只是一个简单的演示程序,实际使用中应该考虑更多的错误处理和参数配置。