if( (fd = serialOpen("/dev/ttyAMA0", 9600)) == -1 ) //初始化串口,波特率9600 { printf("voice init error\n"); exit(); } 帮我换种写法
时间: 2024-04-11 07:28:59 浏览: 9
Sure! Here's an alternative way to write the code:
```c
fd = serialOpen("/dev/ttyAMA0", 9600);
if (fd == -1) {
printf("voice init error\n");
exit(1);
}
```
In this version, we assign the result of `serialOpen` to `fd` first, and then check if `fd` is equal to -1. If it's -1, we print the error message and exit the program.
相关问题
int fd; f( (fd = serialOpen("/dev/ttyAMA0", 9600)) == -1 ) //初始化串口,波特率9600 { printf("voice init error\n"); exit(); } 帮我换种写法
Sure! Here's an alternative way to write the code:
```c
int fd = serialOpen("/dev/ttyAMA0", 9600);
if (fd == -1) {
printf("voice init error\n");
exit(1);
}
```
In this version, we declare the variable `fd` and assign the result of `serialOpen` to it in a separate line. Then we check if `fd` is equal to -1. If it's -1, we print the error message and exit the program.
写一个c语言程序,从串口UART1接收数据,串口初始化数据波特率为9600,数据位为8停止位为1,偶校验
好的,以下是一个简单的C语言程序,实现从串口UART1接收数据,串口初始化数据波特率为9600,数据位为8停止位为1,偶校验:
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
int main()
{
int fd;
struct termios options;
// 打开串口设备
fd = open("/dev/ttyS1", O_RDWR | O_NOCTTY | O_NDELAY);
if (fd < 0) {
perror("open");
exit(1);
}
// 获取当前串口属性
tcgetattr(fd, &options);
// 设置波特率为9600
cfsetispeed(&options, B9600);
cfsetospeed(&options, B9600);
// 设置数据位为8,停止位为1,偶校验
options.c_cflag |= PARENB; // 启用偶校验
options.c_cflag &= ~PARODD; // 设置为偶校验
options.c_cflag &= ~CSTOPB; // 设置停止位为1
options.c_cflag &= ~CSIZE;
options.c_cflag |= CS8;
// 应用新的串口属性
tcsetattr(fd, TCSANOW, &options);
printf("Serial port initialized.\n");
// 读取串口数据
char buf[256];
while (1) {
int len = read(fd, buf, sizeof(buf));
if (len > 0) {
buf[len] = '\0';
printf("Received: %s\n", buf);
}
usleep(10000); // 等待10ms
}
// 关闭串口设备
close(fd);
return 0;
}
```
请注意,该程序仅供参考,并未经过严格测试,可能存在漏洞和错误。在实际使用时,应该根据具体情况进行修改和完善。