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STM32F4: Increase ADC sample time for VREF #4929

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Merged
merged 1 commit into from
Sep 5, 2017
Merged

STM32F4: Increase ADC sample time for VREF #4929

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5 changes: 3 additions & 2 deletions targets/TARGET_STM/TARGET_STM32F4/analogin_api.c
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Original file line number Diff line number Diff line change
Expand Up @@ -180,11 +180,12 @@ static inline uint16_t adc_read(analogin_t *obj)
break;
case 17:
sConfig.Channel = ADC_CHANNEL_VREFINT;
/* From experiment, measurement needs max sampling time to be valid */
sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
break;
case 18:
sConfig.Channel = ADC_CHANNEL_VBAT;
/* From experiment, VBAT measurement needs max
* sampling time to be avlid */
/* From experiment, measurement needs max sampling time to be valid */
sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
break;
default:
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