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TM4C129CNCZAD: UART Flow control for TM4C129X

Part Number: TM4C129CNCZAD
Other Parts Discussed in Thread: CC2564


We want to establish UART communication between TM4C129X and CC2564. We have done with all initial hardware configuration like nshutdown reset

and configured 32khz slow clock. For UART communication CC2564 needs flow control. We used hardware flowcontrol for UART3. We followed the code used in bluetopia sample.

The sample code used xon/xoff software flow control. Is hardware flow control sufficient for that? We are not able to send/ receive packet over UART.



  • Hi,
    I'm not familiar with bluetopia. I think the bluetopia is a bluetooth stack for the CC25xx side. Is the bluetopia sample designed/written to interface with the Tiva device? Since I'm not familiar with bluetopia, I will need to transfer your question to the proper forum group.

    As for Tiva device the UART3 supports hardware flow control using the RTS/CTS handshake signals. You can find details about flow control in the datasheet.
  • Which BT stack are using? CC2564 automatically detects if the H4 (4 wire protocol) or H5 (3 wire) protocol is used. If, you are not using Bluetopia stack, please ensure your stack is following the BT SIG H4 protocol.

    Also, it would help connecting the FW logger to check how the CC2564 is detecting the incoming UART data from the TIVAC host.