I implement Half Duplex RS485 communication on iMx7 module, it works perfectly.
Then I tried to implement that on T30 module, I didn’t change the Colibri Evaluation board configuration (jumpers are well connected) and the .Net program is the same.
But the DataReceived event of SerialPort class is not raised when I send data on the Colibri port (but the buffer UART receives the message), however the event is well raised on RS232 communication (using the same UART_B).
And when a probe is plugged on the Rx pin of UART_B, the event is well raised but with an additional byte on the frame.
Why this DataReceived event doesn’t work on RS485 communication with T30 module ?