Hi guys:
I want to communicate with other device with Uart3 “/dev/ttyTHS3”( Pin H9 H10).
I just write the serial port with “write(int fd, const void *buf, size_t count)” method.
The returned value is always -1, and the errno always 0.
But i take “/dev/ttyTHS2” or “/dev/ttyTHS1” as the serial port, i never got this problem, write and read success.
I appreciate anyone help me very well.