TM4C1294NCPDT: GPIOPinWrite PM1&PM2 not working.

Tzipi Kluska

Prodigy 60 points

Part Number: TM4C1294NCPDT

Tool/software:

Hi,

I'm trying to use GPIOPinWrite function on Port M Pins 1 and 2 and the output doesn't change to 1.

ROM_GPIOPinTypeGPIOOutput(GPIO_PORTM_BASE, GPIO_PIN_0);

ROM_GPIOPinTypeGPIOOutput(GPIO_PORTM_BASE, GPIO_PIN_1);

ROM_GPIOPinTypeGPIOOutput(GPIO_PORTM_BASE, GPIO_PIN_2);

and then in another function:

GPIOPinWrite (GPIO_PORTM_BASE, GPIO_PIN_1, 1); // Not Working

GPIOPinWrite (GPIO_PORTM_BASE, GPIO_PIN_0, 1); // Working

GPIOPinWrite (GPIO_PORTM_BASE, GPIO_PIN_2, 1); // Not Working

I don't see any reason for this.

I really appreciate your help!

Tzipi

over 1 year ago

+1 Charles Tsai over 1 year ago

TI__Guru**** 191906 points

Tzipi Kluska said:
and then in another function:

GPIOPinWrite (GPIO_PORTM_BASE, GPIO_PIN_1, 1); // Not Working

GPIOPinWrite (GPIO_PORTM_BASE, GPIO_PIN_0, 1); // Working

GPIOPinWrite (GPIO_PORTM_BASE, GPIO_PIN_2, 1); // Not Working

Your code is not correct. If you want to set PM1 high you need to write as follows. GPIO_PIN_0 is the first bit of the port while GPIO_PIN_1 is the second bit of the port and likewise GPIO_PIN_2 is at the third bit of the port. It is a bit-pack value.

GPIOPinWrite (GPIO_PORTM_BASE, GPIO_PIN_1, GPIO_PIN_1);

GPIOPinWrite (GPIO_PORTM_BASE, GPIO_PIN_0, GPIO_PIN_0);

GPIOPinWrite (GPIO_PORTM_BASE, GPIO_PIN_2, GPIO_PIN_2);