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aethaniel / ExperimentalCore-sam

Experimental new core for Arduino Due and other Atmel SAM boards
GNU Lesser General Public License v2.1
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Reading pin configured as output returns wrong value #61

Closed jlbirccyn closed 6 years ago

jlbirccyn commented 6 years ago

(tested on Arduino DUE)

digitalRead does:

  if ( (Ports[g_aPinMap[ulPin].iPort].pGPIO->PIO_PDSR & g_aPinMap[ulPin].ulPin) != 0 )
  {
    return HIGH ;
  }

However if the pin is programmed as output, PIO_PDSR seems not to get the pin state. I discover the ATMEL peripherals but maybe PIO_ODSR should be read instead when the pin is programmed as output.

aethaniel commented 6 years ago

Thanks for the report @jlbirccyn ! Sorry for late answer, I receive notification mails from github only when I'm cited.