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pull/3302/head
bcostm 2016-11-22 11:03:44 +01:00
parent 2ae748910b
commit a3baf2d7bf
1 changed files with 6 additions and 1 deletions
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7
targets/TARGET_STM/TARGET_STM32F4/analogin_api.c
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@ -183,7 +183,12 @@ static inline uint16_t adc_read(analogin_t *obj)
return 0; return 0;
} }
ADC->CCR &= ~(ADC_CCR_VBATE | ADC_CCR_TSVREFE); // Workaround // Measuring VBAT sets the ADC_CCR_VBATE bit in ADC->CCR, and there is not
// possibility with the ST HAL driver to clear it. If it isn't cleared,
// VBAT remains connected to the ADC channel in preference to temperature,
// so VBAT readings are returned in place of temperature.
ADC->CCR &= ~(ADC_CCR_VBATE | ADC_CCR_TSVREFE);
HAL_ADC_ConfigChannel(&AdcHandle, &sConfig); HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
HAL_ADC_Start(&AdcHandle); // Start conversion HAL_ADC_Start(&AdcHandle); // Start conversion