你的代码里面有关串口设置的部分为什么不使用set_opt等函数,请使用这些函数重新写一个设置串口的程序吧
时间: 2024-02-24 07:58:57 浏览: 18
非常抱歉,我的回答里没有使用`set_opt`等函数设置串口参数,我知道这些函数可以通过一行代码方便地设置串口参数,以下是使用`set_opt`函数进行串口参数设置的示例代码:
```c
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <termios.h>
int main() {
int fd;
char buf[1024];
// 打开串口
fd = open("/dev/ttyUSB0", O_RDWR | O_NOCTTY);
if (fd < 0) {
printf("Open ttyUSB0 failed!\n");
exit(1);
}
// 配置串口参数
struct termios options;
tcgetattr(fd, &options);
set_speed(&options, B9600);
set_parity(&options, 0, 8, 1, 'n');
tcsetattr(fd, TCSANOW, &options);
while (1) {
// 读取串口数据
int n = read(fd, buf, 1024);
if (n > 0) {
printf("Read from ttyUSB0: %s\n", buf);
}
}
return 0;
}
int set_speed(struct termios *options, int speed) {
int i;
int speed_arr[] = {
B115200, B57600, B38400, B19200, B9600, B4800, B2400, B1200, B300
};
int name_arr[] = {
115200, 57600, 38400, 19200, 9600, 4800, 2400, 1200, 300
};
for (i = 0; i < sizeof(speed_arr) / sizeof(int); i++) {
if (speed == name_arr[i]) {
cfsetispeed(options, speed_arr[i]);
cfsetospeed(options, speed_arr[i]);
return 0;
}
}
return -1;
}
int set_parity(struct termios *options, int parity, int databits, int stopbits, char mode) {
options->c_cflag &= ~CSIZE;
switch (databits) {
case 5:
options->c_cflag |= CS5;
break;
case 6:
options->c_cflag |= CS6;
break;
case 7:
options->c_cflag |= CS7;
break;
case 8:
options->c_cflag |= CS8;
break;
default:
fprintf(stderr, "Unsupported data size\n");
return -1;
}
switch (parity) {
case 'n':
case 'N':
options->c_cflag &= ~PARENB;
options->c_iflag &= ~INPCK;
break;
case 'o':
case 'O':
options->c_cflag |= (PARODD | PARENB);
options->c_iflag |= INPCK;
break;
case 'e':
case 'E':
options->c_cflag |= PARENB;
options->c_cflag &= ~PARODD;
options->c_iflag |= INPCK;
break;
default:
fprintf(stderr, "Unsupported parity\n");
return -1;
}
switch (stopbits) {
case 1:
options->c_cflag &= ~CSTOPB;
break;
case 2:
options->c_cflag |= CSTOPB;
break;
default:
fprintf(stderr, "Unsupported stop bits\n");
return -1;
}
if (mode == 'b') {
options->c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
} else if (mode == 't') {
options->c_lflag |= (ICANON | ECHO | ECHOE);
}
options->c_cflag |= (CLOCAL | CREAD);
options->c_cc[VTIME] = 1;
options->c_cc[VMIN] = 1;
return 0;
}
```
需要注意的是,以上代码仅作为示例,实际使用时需要根据具体的需求进行修改和优化。