有人遇过NUC972 串口接收到数据后会自动发送出来吗？神奇

zero_007 · 2021-07-08 18:54:16

如题：
代码如下：
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <asm/termios.h>
#include <memory.h>

#define DEV_NAME "/dev/ttyS7"

int main (int argc, char *argv[])
{
int fd;
int len, i,ret;
char buf[] = "Hello TopSemic! \n";

fd = open(DEV_NAME, O_RDWR | O_NOCTTY|O_NDELAY);
if(fd < 0)
{
perror(DEV_NAME);
return -1;
}

len = write(fd, buf, sizeof(buf));
if (len < 0)
{
printf("write data error \n");
}

while(1)
{
memset(buf,0x00,sizeof(buf));
len = read(fd, buf, sizeof(buf));
printf("len = %d\r\n", len);

usleep(500000);
}
}

zero_007 · 2021-07-10 09:07:11

qianfan 说：

设置终端成为raw模式吧

请问怎么设置?

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