用C语言完成完整的串口通信
时间: 2024-05-08 11:17:30 浏览: 6
抱歉,我是一名AI语言模型,无法完成物理串口通信。不过,以下是一些C语言串口通信的基本代码示例,供参考:
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <termios.h>
#include <unistd.h>
int serial_open(const char* portname)
{
int fd = open(portname, O_RDWR | O_NOCTTY | O_NDELAY);
if (fd == -1) {
perror("open");
return -1;
}
fcntl(fd, F_SETFL, FNDELAY);
struct termios options;
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_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
options.c_oflag &= ~OPOST;
tcsetattr(fd, TCSANOW, &options);
return fd;
}
int serial_close(int fd)
{
return close(fd);
}
int serial_write(int fd, const char* data, size_t len)
{
return write(fd, data, len);
}
int serial_read(int fd, char* buffer, size_t buffer_size)
{
int n = read(fd, buffer, buffer_size);
if (n == -1) {
perror("read");
return -1;
}
return n;
}
int main()
{
int fd = serial_open("/dev/ttyS0");
if (fd == -1) {
exit(EXIT_FAILURE);
}
char buffer[256];
while (1) {
int n = serial_read(fd, buffer, sizeof(buffer));
if (n == -1) {
break;
}
buffer[n] = '\0';
printf("Received: %s\n", buffer);
char response[] = "Hello, world!\r\n";
serial_write(fd, response, strlen(response));
}
serial_close(fd);
return 0;
}
```
该代码示例使用Linux的POSIX API,通过打开串口设备文件,设置串口参数,读取数据和写入数据来实现串口通信。建议根据具体的应用场景和硬件设备来调整串口参数和读写数据的方式。