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[samd] fixing issue #28 #41

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[samd] fixing issue #28 #41

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59 changes: 40 additions & 19 deletions cores/arduino/wiring_digital.c
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Original file line number Diff line number Diff line change
Expand Up @@ -69,45 +69,66 @@ void pinMode( uint32_t ulPin, uint32_t ulMode )
}
}

void digitalWrite( uint32_t ulPin, uint32_t ulVal )
void digitalWrite(uint32_t ulPin, uint32_t ulVal)
{
// Handle the case the pin isn't usable as PIO
if ( g_APinDescription[ulPin].ulPinType == PIO_NOT_A_PIN )
uint32_t ulGPIOPin=g_APinDescription[ulPin].ulPin;
PortGroup* port=&(PORT->Group[g_APinDescription[ulPin].ulPort]);

// Handle the case the pin is invalid
if (ulPin >= PINS_COUNT)
{
return ;
}

// Enable pull-up resistor
PORT->Group[g_APinDescription[ulPin].ulPort].PINCFG[g_APinDescription[ulPin].ulPin].reg=(uint8_t)(PORT_PINCFG_PULLEN) ;

switch ( ulVal )
// Test if pin is set to INPUT mode, then activate pull-up according to ulVal
if (port->DIR.reg & (1ul<<ulGPIOPin) != 0)
{
case LOW:
PORT->Group[g_APinDescription[ulPin].ulPort].OUTCLR.reg = (1ul << g_APinDescription[ulPin].ulPin) ;
break ;

default:
PORT->Group[g_APinDescription[ulPin].ulPort].OUTSET.reg = (1ul << g_APinDescription[ulPin].ulPin) ;
break ;
switch (ulVal)
{
case LOW:
// Disable pull-up resistor
port->PINCFG[ulGPIOPin].bit.PULLEN=0;
break;

case HIGH:
default:
// Enable pull-up resistor
port->PINCFG[ulGPIOPin].bit.PULLEN=1;
break;
}
}
else // pin is set to OUTPUT mode, we output the requested voltage level
{
switch (ulVal)
{
case LOW:
port->OUTCLR.reg=(1ul<<ulGPIOPin);
break;

case HIGH:
default:
port->OUTSET.reg=(1ul<<ulGPIOPin);
break;
}
}

return ;
}

int digitalRead( uint32_t ulPin )
{
// Handle the case the pin isn't usable as PIO
if ( g_APinDescription[ulPin].ulPinType == PIO_NOT_A_PIN )
// Handle the case the pin is invalid
if (ulPin >= PINS_COUNT)
{
return LOW ;
return LOW;
}

if ( (PORT->Group[g_APinDescription[ulPin].ulPort].IN.reg & (1ul << g_APinDescription[ulPin].ulPin)) != 0 )
{
return HIGH ;
return HIGH;
}

return LOW ;
return LOW;
}

#ifdef __cplusplus
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