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Code Issues Releases Activity

Due: modify ADC enable/disable sequence

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to avoid the bug #2198 simply reconfigure the pin -> no additional overhead if pinMode configuration is performed at the beginning of the sketch, 4 to 25% overhead on all analogRead() due to the additional check
This commit is contained in:
Martino Facchin 2015-03-23 10:33:56 +01:00
parent 9491c1f308
commit 8589c792cb
2 changed files with 9 additions and 2 deletions
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4
hardware/arduino/sam/cores/arduino/wiring_analog.c
View File

@ -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;
}

7
hardware/arduino/sam/cores/arduino/wiring_digital.c
View File

@ -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: