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UART flow control sample

Ahmed Mokhtar
Intellectual 490 points

Hello,

I'm using TM4C129XNZAD microcontroller and TivaWare_C_Series-2.1.0.12573. i am  wandering if there is any sample for using hardware flow control with the UART.

Thank you

Regards

Ahmed 

  • 0
    Guru 47900 points

    Isn't it true that (some) MCU ports include more than the two standard (TX & RX) UART pins - and these, "extra pins" (usually RTS & CTS) are normally used to implement, HW Flow Control?

    Note that not all MCU Ports contain these extra pins - you must examine the various ports to locate them.

    You can experiment w/these pins by driving the (receive-based one - I believe that's CTS) with a simple routing to a free GPIO on your MCU.   When that pin is properly controlled the MCU's UART_TX may not be enabled for output until CTS is properly driven.   (I've not done this - with this vendor's parts - so you'll need to read the MCU manual & examine UART Registers to confirm)

    I'm unaware of any UART example illustrating HW Flow Control.   The experimental method I've outlined should yield success if you're systematic & patient...