quote:

---

Originally posted by wabtec4 at topic 1629

I am using WriteFile on CE /3.0/4.1, my problem is this function outputs to serial port at an inconsistent speed, the variation is too big, for example:
WriteFile( hComm, Buf, 200, &Written, NULL );
In most times, it works fine, delay between any 2 bytes is less than 1 ms, but sometimes, I noticed a big gap between 2 bytes, 100th byte & 101st byte for exapmle, up to 1600 ms, what's the problem?
Another thread is reading hComm.
Thanks,

---