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TM4C123G UART Flow Control

Duane Bester
Prodigy 100 points


Hey there,

I noticed in the TM4C123G Datasheet mentions flow control on UART1:

"Modem flow control and status (on UART1)"

Just wondering if I can only use UART1 for RTS/CTS and RX/TX?

There's no way I can use U2RX (PD6) for an RTS, correct?

Thanks!

  • 0
    Guru 47900 points

    Usually (but possibly - not always) there is one, "modem style, UART instantiation" per this class MCU.  Appears that you've read/reviewed the MCU manual - you should encounter a pin-out listing keyed by functionality - (such as ADC, PWM, UART) and this should confirm the presence/absence of any/all "modem style, UART Ports.

    I'm placing a tall chip-stack on, "just one."

    You may "bit-bang" (to functionally extend the normal "abbreviated" UART) - but the built-in capability is so much quicker/easier...

  • 0 in reply to cb1
    Prodigy 100 points

    Thanks for the reply, the Pin Configurations definitely shows UART1 as the one with CTS / RTS. Looks like I'll have to mess with software interrupts.