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TM4C1290NCPDT: Fault ISR after configuring port J0 as input

Sam Frank
Prodigy 160 points

Part Number: TM4C1290NCPDT

Hi,

I am using CCS version 10.1.0.00010 with TivaC EK-TM4C1294XL LaunchPad under Windows 10 x64 professional.

I am trying to read button 1 state and therefore I configure Port J0 as input with the following instruction:

    GPIOPinTypeGPIOInput(GPIO_PORTJ_BASE,GPIO_PIN_0);

As soon as this instruction is executed, the firmware enters the FaultISR. 

To make sure nothing else is going on, I put this instruction in the main function right after setting the clock and I still have the same behavior.

I checked the TM4C datasheet and it does not seem that port J0 is locked.

I would appreciate any clarification.

Thanks,

Sam