RTOS/EK-TM4C129EXL: TM4C129

kalyan perepa

Prodigy 210 points

Part Number: EK-TM4C129EXL

Tool/software: TI-RTOS

PORT D PIN 7 doesn't work at all.It always stays low.

GPIOPinTypeGPIOOutput(GPIO_PORTD_AHB_BASE,(GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7));

GPIOPinWrite(GPIO_PORTD_AHB_BASE, (GPIO_PIN_7), 128);
GPIOPinWrite(GPIO_PORTD_AHB_BASE, (GPIO_PIN_7), 0);

over 6 years ago

0 Charles Tsai over 6 years ago

TI__Guru**** 191086 points

Hi,

Do you see the same issue with pin PD4,5 and 6?

Can you try GPIO_PORTD_BASE instead of GPIO_PORTD_AHB_BASE?

0 kalyan perepa over 6 years ago in reply to Charles Tsai

Prodigy 210 points

Port D pin 4,5,6 works fine ,only pin 7 is the issue.i did try just portD and it didnt work.

0 Charles Tsai over 6 years ago in reply to kalyan perepa

TI__Guru**** 191086 points

Hi Kalyan,
The reason is that the PD7 is locked by default as it is normally used as a NMI pin. If you want to use it as a GPIO pin you will need to unlock the pin first. Please see the below post to unlock the pin.

e2e.ti.com/.../685150

Arm-based microcontrollers

Arm-based microcontrollers forum

RTOS/EK-TM4C129EXL: TM4C129