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TI Home » TI E2E Community » Support Forums » Microcontrollers » Stellaris® ARM® Microcontrollers » Stellaris® ARM® LM3S Microcontrollers Forum » Sorts of pin configuration functions
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    Sorts of pin configuration functions

    This question is not answered
    Andre Marianovich
    Posted by Andre Marianovich
    on May 09 2012 04:46 AM
    Intellectual975 points

    Hi

    I've a short question. What is the proper difference between GPIOPinConfigure() and GPIOPinTypeI2S()? To me it seems they do just the same. Is that right or am I missing something?

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    • cb1_mobile
      Posted by cb1_mobile
      on May 09 2012 07:26 AM
      Guru21740 points

      To get the best possible answer you should review the code for each function - it's found w/in file gpio.c w/in the Driver Library.  Believe this will prove more valuable to you than a direct answer - enabling you to expand your understanding via this general method.   Your question is a bit more involved - and may depend upon the "class" of Stellaris MCU that you've chosen.  Certain functions are only appropriate for the more powerful - and newer MCUs.  The Stellaris "class" issue appears to be, "work in progress..."

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    • Hailin Jiang
      Posted by Hailin Jiang
      on May 09 2012 14:48 PM
      Intellectual425 points

      It does two different things.

      GPIOPinConfigure() configures the pin mux that selects the peripheral function associated with a particular GPIO pin.

      GPIOPinTypeI2S() makes it for a particular peripheral, for example, I2S in this case.

      Please note that some pins can be used as several different peripherals.

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    • Andre Marianovich
      Posted by Andre Marianovich
      on May 10 2012 14:40 PM
      Intellectual975 points

      Thank you both for your reply. I guess, I've a clue now what's the purpose of those functions.

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