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Due: modify ADC enable/disable sequence #2823

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Due: modify ADC enable/disable sequence #2823

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4 changes: 2 additions & 2 deletions hardware/arduino/sam/cores/arduino/wiring_analog.c
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Original file line number Diff line number Diff line change
Expand Up @@ -148,9 +148,9 @@ uint32_t analogRead(uint32_t ulPin)
case ADC11 :

// Enable the corresponding channel
if (ulChannel != latestSelectedChannel) {
if (adc_get_channel_status(ADC, ulChannel) != 1) {
adc_enable_channel( ADC, ulChannel );
if ( latestSelectedChannel != (uint32_t)-1 )
if ( latestSelectedChannel != (uint32_t)-1 && ulChannel != latestSelectedChannel)
adc_disable_channel( ADC, latestSelectedChannel );
latestSelectedChannel = ulChannel;
}
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7 changes: 7 additions & 0 deletions hardware/arduino/sam/cores/arduino/wiring_digital.c
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,13 @@ extern void pinMode( uint32_t ulPin, uint32_t ulMode )
return ;
}

#if defined __SAM3X8E__ || defined __SAM3X8H__
if(g_APinDescription[ulPin].ulPinType != NO_ADC && adc_get_channel_status(ADC, g_APinDescription[ulPin].ulADCChannelNumber))
{
adc_disable_channel( ADC, g_APinDescription[ulPin].ulADCChannelNumber);
}
#endif

switch ( ulMode )
{
case INPUT:
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