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RTOS/TM4C1294NCPDT: GPIO function calls in Tiva C series EVK

Manohar B
Intellectual 610 points
Part Number: TM4C1294NCPDT

Tool/software: TI-RTOS

Hi,

I can find the below function in GPIO driver calls,

void GPIO_setConfig(unsigned int index, GPIO_PinConfig pinConfig)

void GPIO_toggle(unsigned int index)

Question:

1. What actually should be passed for index and pinconfig arguments?

2.Steps to configure a pin as GPIO and toggle the pin? for PORT F Pin 1?

Regards,

Manohar

  • 0
    TI__Guru*** 134855 points
    Hello Manohar,

    For starters, have you looked through the TI RTOS Driver API's? You can find the document link for them in [Install Path]\tirtos_tivac_2_16_00_08\docs - look for Documentation_Overview_tivac.html

    In general, the index should be the Pin you are trying to configure, and PinConfig should be the settings for it. The PinConfig input should be based on the #define's in GPIO.h which start with "GPIO_CFG_"
  • 0 in reply to Ralph Jacobi
    Intellectual 610 points
    Hi,
    I am still not aware of what is the argument called index, that have to be passed in every GPIO function calls.
    Whether it is a PORT base address? If it is a Pin number? what exactly should I give ?
    Example for PA3 to configure as output pin, I should give index as 3 or Microcontroller pin number 36?

    What exactly should I pass in GPIO index?




    Regards,
    Manohar.
  • 0 in reply to Robert Adsett
    TI__Guru*** 134855 points

    Hello Manohar,

    I am not really ramped on the TI-RTOS side of Tiva yet so for the immediate moment I encourage you to look at existing examples and the documentation to see if you can find some more clarity. Another useful document may be: http://www.ti.com/lit/ug/spruhd4m/spruhd4m.pdf I will see if some more knowledge about the workings of TI-RTOS can explain what you need to do in a more layman manner than my initial attempt.

    Also consider looking into: https://training.ti.com/ti-rtos-workshop-series

    Robert - FYI the API calls listed by Manohar are for TI-RTOS supporting Tiva-C, not TivaWare, so that link won't provide any useful info when comparing it against what needs to be done for TI-RTOS.

  • 0 in reply to Manohar B
    TI__Mastermind 30830 points

    The index argument to the GPIO APIs is the index into the GPIO_PinConfig array that defines the configuration of the particular GPIO pin to be operated on by the API. Each element in the array contains pin ID and configuration information to help the GPIO driver manage the pin.

    Alan