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TM4C1294NCPDT: Switching between EPI and GPIO

Victor L-S
Intellectual 925 points
Part Number: TM4C1294NCPDT

Hello Amit,

I am working on a design whereby I need to use EPI021 through EPI027 as memory addresses in one configuration but as GPIOs in a second configuration. Is it possible to make such a switch "on the fly" so to speak? Is it a simple matter of alternately using GPIOPinConfigure/GPIOPinTypeEPI and GPIOPinTypeGPIOOutput? If so are there any cautions I should be aware of?

Thank you for your assistance,

Victor

  • 0
    TI__Guru 72500 points

    Amit is actually on a much deserved vacation right now. Yes, you can change the configuration of the pins from EP address and then back to GPIOs. Just be cautious that you do no accesses to the EP space while the pins are GPIO and be cautious about the impact of the address lines toggling on the signals where you use the pins as GPIO.