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MSP432P401R CODING LOGIC FOR GPIO

Nafeesa Muntashar57
Intellectual 810 points


Hello,

I am writing an embedded C code for MSP432P401R. If i want to check the "set" condition for  the GPIO pin i write this logic "if (P1IN & BIT1)"..

What should be the logic for checking the "reset" condition on GPIO pin?

Please help me out..

Thanks 

  • 0
    Guru 74080 points

    Hi Nafeesa,

    "Set" and "Reset" may not be the right words for that, but you already placed them in quotation marks yourself. By writing

    if( P1IN & BIT1 )
{
  // Do something when input pin is high
}

    you can perform an action when the voltage level on the input pin causes it to be high.

    For the opposite case you simply write

    if( !(P1IN & BIT1) )
{
  // Do something when input pin is low
}

    This checks if the pin is not high.

    Dennis

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