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__LL_ADC_CALC_VREFANALOG_VOLTAGE macro
Helper macro to calculate analog reference voltage (Vref+) (unit: mVolt) from ADC conversion data of internal voltage reference VrefInt.
Syntax
#define __LL_ADC_CALC_VREFANALOG_VOLTAGE(__VREFINT_ADC_DATA__,\
__ADC_RESOLUTION__) \
(((uint32_t)(*VREFINT_CAL_ADDR) * VREFINT_CAL_VREF) \
/ __LL_ADC_CONVERT_DATA_RESOLUTION((__VREFINT_ADC_DATA__), \
(__ADC_RESOLUTION__), \
LL_ADC_RESOLUTION_12B))
Return value
Analog reference voltage (unit: mV)
Notes
Computation is using VrefInt calibration value stored in system memory for each device during production. This voltage depends on user board environment: voltage level connected to pin Vref+. On devices with small package, the pin Vref+ is not present and internally bonded to pin Vdda. On this STM32 series, calibration data of internal voltage reference VrefInt corresponds to a resolution of 12 bits, this is the recommended ADC resolution to convert voltage of internal voltage reference VrefInt. Otherwise, this macro performs the processing to scale ADC conversion data to 12 bits.