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Code Issues Releases Activity

Fix adc_configure_trigger enabling and disabling FreeRun Fix changing trigger type

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This commit is contained in:
Marc-Andre Ferland 2014-01-25 01:06:09 -05:00 committed by Martino Facchin
parent 8589c792cb
commit 33255ef46d
1 changed files with 24 additions and 3 deletions
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27
hardware/arduino/sam/system/libsam/source/adc.c
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@ -192,18 +192,39 @@ void adc_set_resolution(Adc *p_adc,const enum adc_resolution_t resolution)
void adc_configure_trigger(Adc *p_adc, const enum adc_trigger_t trigger,
uint8_t uc_freerun)
{
p_adc->ADC_MR |= trigger | ((uc_freerun << 7) & ADC_MR_FREERUN);
//Warning ADC_MR_TRGSEL_Msk does not include ADC_MR_TRGEN.
p_adc->ADC_MR &= ~(ADC_MR_TRGEN | ADC_MR_TRGSEL_Msk | ADC_MR_FREERUN); //Clear all bits related to triggers and freerun
//Configure FreeRun
if(uc_freerun & ADC_MR_FREERUN == ADC_MR_FREERUN_ON) { //FreeRun is enabled
p_adc->ADC_MR |= ADC_MR_FREERUN_ON;
//Free Run Mode: Never wait for any trigger
//No need to continue and enable hardware triggers
return;
}
//Configure hardware triggers
if(trigger & ADC_MR_TRGEN == ADC_MR_TRGEN_EN) { //Hardware trigger is enabled
p_adc->ADC_MR |= (trigger & ADC_MR_TRGSEL_Msk) | ADC_MR_TRGEN_EN; //Set trigger selection bits and enable hardware trigger
}
}
#elif SAM3U_SERIES
/**
* \brief Configure conversion trigger and free run mode.
* \brief Configure conversion trigger.
*
* \param p_adc Pointer to an ADC instance.
* \param trigger Conversion trigger.
*/
void adc_configure_trigger(Adc *p_adc, const enum adc_trigger_t trigger)
{
p_adc->ADC_MR |= trigger;
//Warning ADC_MR_TRGSEL_Msk does not include ADC_MR_TRGEN.
p_adc->ADC_MR &= ~(ADC_MR_TRGEN | ADC_MR_TRGSEL_Msk); //Clear all bits related to triggers
//Configure hardware triggers
if(trigger & ADC_MR_TRGEN == ADC_MR_TRGEN_EN) { //Hardware trigger is enabled
p_adc->ADC_MR |= (trigger & ADC_MR_TRGSEL_Msk) | ADC_MR_TRGEN_EN; //Set trigger selection bits and enable hardware trigger
}
}
#endif