使用fopen写入嵌入式Linux的串行端口

Question

Try writing to serial port embedded linux using fopen:

   void send(char * text) {
    FILE * output;
    output = fopen("/dev/ttyM0");
    if(output != NULL) {
      fputs(text, output);
      fclose(output);
    }

After about 4000 sends i get only null pointer. No ideas what's wrong.

Answer 1

I would use the open system call. fopen is Standard C Library call for buffered file IO.