Can't configure PORTG as normal IO on TM4C123GXL

Maka Luo

Intellectual 1125 points

Other Parts Discussed in Thread: TM4C1230H6PM

Hello,

Customer use TM4C1230H6PM, find can't configure PORTG as IO.

the source code is as below:

SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG); //enable GPIOG

    GPIODirModeSet(GPIO_PORTG_BASE, GPIO_PIN_1, GPIO_DIR_MODE_OUT);
    GPIOPadConfigSet(GPIO_PORTG_BASE, GPIO_PIN_1 , GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
    GPIOPinTypeGPIOOutput(GPIO_PORTG_BASE, GPIO_PIN_1);

I have tested the same source code on our TM4C123GXL, find the same problem. when call GPIODirModeSet api, will enter into FaultISR. it seems PORTG can't use, but other PORT are OK.

over 10 years ago

0 Haresh G over 10 years ago

Intellectual 685 points

What does "GPIO_STRENGTH_2MA" term mean ???

0 Markel Robregado over 10 years ago

Guru 86745 points

Hi Maka,

See, issue 2 from the link below.

Diagnosing Common Development Problems and Tips for TM4C Devices

Maka Luo said:
    GPIODirModeSet(GPIO_PORTG_BASE, GPIO_PIN_1, GPIO_DIR_MODE_OUT);
    GPIOPadConfigSet(GPIO_PORTG_BASE, GPIO_PIN_1 , GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
    GPIOPinTypeGPIOOutput(GPIO_PORTG_BASE, GPIO_PIN_1);

Also, you don't need the GPIODirModeSet() and GPIOPadConfigSet() code lines, because both C API's are called internally at GPIOPinTypeGPIOOutput().

- kel

0 Markel Robregado over 10 years ago in reply to Haresh G

Guru 86745 points

Haresh G said:
What does "GPIO_STRENGTH_2MA" term mean ???

You, can find more information about this at the TM4C123 datasheet, under GPIO section.

- kel

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Can't configure PORTG as normal IO on TM4C123GXL