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MPC57xx howto add UART hardware flow control (CTS/RTS) ?

Question asked by Ruud Siebierski on Apr 11, 2019
Latest reply on Apr 18, 2019 by Ruud Siebierski

I'm trying to add hardware flow control (based on CTS/RTS) to the MPC5748G UART. The MPC is connected to a FTDI2232H in UART mode, and I have a .NET application running on the PC which sends serial data using the virtual COM port.

Basically the setup works, when I de-assert the RTS output of the MPC, the transmission of data stops, but not immediately. It seems that 1 byte is still sent which causes a buffer overrun error on the MPC side.

 

Is there a recommended way on how to implement hardware flow control for the MPC ? 

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