on my qnx632 target, i wrote and read from the same serial port. In my task loop, i read first and then sent out the request for the data to be read in the next loop, read and write operation keep going in the loop with a period of 20ms.
The problem now is after several normal thousands of read and write operations, it got stuck in the read operation and could never return.
what might be the reasons leading to the zombie state? thx