linux串口编程实例
时间: 2023-04-30 20:06:00 浏览: 59
这道问题需要进一步解释。若是要求编写 Linux 串口编程示例代码,则可以如下:
```
#include <stdio.h> /*标准输入输出定义*/
#include <stdlib.h> /*标准函数库定义*/
#include <unistd.h> /*Unix 标准函数定义*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h> /*文件控制定义*/
#include <termios.h> /*POSIX 终端控制定义*/
int open_port(void) {
int fd;
fd = open("/dev/ttyUSB0", O_RDWR | O_NOCTTY | O_NDELAY);
if (fd == -1) {
perror("无法打开串口");
} else {
fcntl(fd, F_SETFL, 0);
}
return (fd);
}
int set_opt(int fd, int nSpeed, int nBits, char nEvent, int nStop) {
struct termios newtio, oldtio;
if (tcgetattr(fd, &oldtio) != 0) {
perror("tcgetattr失败");
return -1;
}
bzero(&newtio, sizeof(newtio));
newtio.c_cflag |= CLOCAL | CREAD;
newtio.c_cflag &= ~CSIZE;
switch (nBits) {
case 7:
newtio.c_cflag |= CS7;
break;
case 8:
newtio.c_cflag |= CS8;
break;
}
switch (nEvent) {
case 'O':
newtio.c_cflag |= PARENB;
newtio.c_cflag |= PARODD;
newtio.c_iflag |= (INPCK|ISTRIP);
break;
case 'E':
newtio.c_iflag |= (INPCK|ISTRIP);
newtio.c_cflag |= PARENB;
newtio.c_cflag &= ~PARODD;
break;
case 'N':
newtio.c_cflag &= ~PARENB;
break;
}
switch (nSpeed) {
case 2400:
cfsetispeed(&newtio, B2400);
cfsetospeed(&newtio, B2400);
break;
case 4800:
cfsetispeed(&newtio, B4800);
cfsetospeed(&newtio, B4800);
break;
case 9600:
cfsetispeed(&newtio, B9600);
cfsetospeed(&newtio, B9600);
break;
case 115200:
cfsetispeed(&newtio, B115200);
cfsetospeed(&newtio, B115200);
break;
default:
cfsetispeed(&newtio, B9600);
cfsetospeed(&newtio, B9600);
break;
}
if (nStop == 1) {
newtio.c_cflag &= ~CSTOPB;
} else if (nStop == 2) {
newtio.c_cflag |= CSTOPB;
}
newtio.c_cc[VTIME] = 0;
newtio.c_cc[VMIN] = 0;
tcflush(fd, TCIFLUSH);
if ((tcsetattr(fd, TCSANOW, &newtio)) != 0) {
perror("tcsetattr失败");
return -1;
}
return (0);
}
int main(void) {
int fd = 0;
fd = open_port();
set_opt(fd, 115200, 8, 'N', 1);
close(fd);
return (0);
}
```
这是一个简单的串口编程示例,其中包括串口打开、串口基本参数设置。我们可以根据实际需求进行修改和使用。