mirror of https://github.com/ARMmbed/mbed-os.git
STM32F4 ADC internal channels update
jeromecoutant
adbridge
parent
4fa4e07a82
commit
14a33312f5
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@ -161,16 +161,15 @@ uint16_t adc_read(analogin_t *obj)
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break;
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case 16:
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sConfig.Channel = ADC_CHANNEL_TEMPSENSOR;
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sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES; // Minimum ADC sampling time when reading the temperature is 10us
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break;
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case 17:
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sConfig.Channel = ADC_CHANNEL_VREFINT;
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/* From experiment, measurement needs max sampling time to be valid */
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sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
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sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES; // Minimum ADC sampling time when reading the internal reference voltage is 10us
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break;
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case 18:
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sConfig.Channel = ADC_CHANNEL_VBAT;
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/* From experiment, measurement needs max sampling time to be valid */
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sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES;
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sConfig.SamplingTime = ADC_SAMPLETIME_480CYCLES; // Minimum ADC sampling time when reading the VBAT is 5us
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break;
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default:
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return 0;
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@ -44,6 +44,9 @@
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f4xx_hal_def.h"
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/* Include low level driver */
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#include "stm32f4xx_ll_adc.h"
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/** @addtogroup STM32F4xx_HAL_Driver
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* @{
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*/
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@ -269,6 +269,18 @@ extern "C" {
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/* ADC registers bits positions */
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#define ADC_CR1_RES_BITOFFSET_POS (24U) /* Value equivalent to POSITION_VAL(ADC_CR1_RES) */
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#define ADC_TR_HT_BITOFFSET_POS (16U) /* Value equivalent to POSITION_VAL(ADC_TR_HT) */
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/* ADC internal channels related definitions */
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/* Internal voltage reference VrefInt */
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#define VREFINT_CAL_ADDR ((uint16_t*) (0x1FFF7A2AU)) /* Internal voltage reference, address of parameter VREFINT_CAL: VrefInt ADC raw data acquired at temperature 30 DegC (tolerance: +-5 DegC), Vref+ = 3.3 V (tolerance: +-10 mV). */
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#define VREFINT_CAL_VREF ( 3300U) /* Analog voltage reference (Vref+) value with which temperature sensor has been calibrated in production (tolerance: +-10 mV) (unit: mV). */
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/* Temperature sensor */
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#define TEMPSENSOR_CAL1_ADDR ((uint16_t*) (0x1FFF7A2CU)) /* Internal temperature sensor, address of parameter TS_CAL1: On STM32F4, temperature sensor ADC raw data acquired at temperature 30 DegC (tolerance: +-5 DegC), Vref+ = 3.3 V (tolerance: +-10 mV). */
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#define TEMPSENSOR_CAL2_ADDR ((uint16_t*) (0x1FFF7A2EU)) /* Internal temperature sensor, address of parameter TS_CAL2: On STM32F4, temperature sensor ADC raw data acquired at temperature 110 DegC (tolerance: +-5 DegC), Vref+ = 3.3 V (tolerance: +-10 mV). */
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#define TEMPSENSOR_CAL1_TEMP (( int32_t) 30) /* Internal temperature sensor, temperature at which temperature sensor has been calibrated in production for data into TEMPSENSOR_CAL1_ADDR (tolerance: +-5 DegC) (unit: DegC). */
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#define TEMPSENSOR_CAL2_TEMP (( int32_t) 110) /* Internal temperature sensor, temperature at which temperature sensor has been calibrated in production for data into TEMPSENSOR_CAL2_ADDR (tolerance: +-5 DegC) (unit: DegC). */
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#define TEMPSENSOR_CAL_VREFANALOG ( 3300U) /* Analog voltage reference (Vref+) voltage with which temperature sensor has been calibrated in production (+-10 mV) (unit: mV). */
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/**
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* @}
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*/
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@ -1654,6 +1666,64 @@ typedef struct
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/ __LL_ADC_DIGITAL_SCALE(__ADC_RESOLUTION__) \
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)
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/**
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* @brief Helper macro to calculate the temperature (unit: degree Celsius)
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* from ADC conversion data of internal temperature sensor.
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* @note Computation is using temperature sensor calibration values
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* stored in system memory for each device during production.
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* @note Calculation formula:
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* Temperature = ((TS_ADC_DATA - TS_CAL1)
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* * (TS_CAL2_TEMP - TS_CAL1_TEMP))
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* / (TS_CAL2 - TS_CAL1) + TS_CAL1_TEMP
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* with TS_ADC_DATA = temperature sensor raw data measured by ADC
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* Avg_Slope = (TS_CAL2 - TS_CAL1)
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* / (TS_CAL2_TEMP - TS_CAL1_TEMP)
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* TS_CAL1 = equivalent TS_ADC_DATA at temperature
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* TEMP_DEGC_CAL1 (calibrated in factory)
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* TS_CAL2 = equivalent TS_ADC_DATA at temperature
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* TEMP_DEGC_CAL2 (calibrated in factory)
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* Caution: Calculation relevancy under reserve that calibration
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* parameters are correct (address and data).
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* To calculate temperature using temperature sensor
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* datasheet typical values (generic values less, therefore
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* less accurate than calibrated values),
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* use helper macro @ref __LL_ADC_CALC_TEMPERATURE_TYP_PARAMS().
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* @note As calculation input, the analog reference voltage (Vref+) must be
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* defined as it impacts the ADC LSB equivalent voltage.
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* @note Analog reference voltage (Vref+) must be either known from
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* user board environment or can be calculated using ADC measurement
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* and ADC helper macro @ref __LL_ADC_CALC_VREFANALOG_VOLTAGE().
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* @note On this STM32 serie, calibration data of temperature sensor
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* corresponds to a resolution of 12 bits,
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* this is the recommended ADC resolution to convert voltage of
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* temperature sensor.
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* Otherwise, this macro performs the processing to scale
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* ADC conversion data to 12 bits.
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* @param __VREFANALOG_VOLTAGE__ Analog reference voltage (unit: mV)
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* @param __TEMPSENSOR_ADC_DATA__ ADC conversion data of internal
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* temperature sensor (unit: digital value).
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* @param __ADC_RESOLUTION__ ADC resolution at which internal temperature
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* sensor voltage has been measured.
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* This parameter can be one of the following values:
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* @arg @ref LL_ADC_RESOLUTION_12B
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* @arg @ref LL_ADC_RESOLUTION_10B
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* @arg @ref LL_ADC_RESOLUTION_8B
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* @arg @ref LL_ADC_RESOLUTION_6B
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* @retval Temperature (unit: degree Celsius)
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*/
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#define __LL_ADC_CALC_TEMPERATURE(__VREFANALOG_VOLTAGE__,\
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__TEMPSENSOR_ADC_DATA__,\
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__ADC_RESOLUTION__) \
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(((( ((int32_t)((__LL_ADC_CONVERT_DATA_RESOLUTION((__TEMPSENSOR_ADC_DATA__), \
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(__ADC_RESOLUTION__), \
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LL_ADC_RESOLUTION_12B) \
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* (__VREFANALOG_VOLTAGE__)) \
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/ TEMPSENSOR_CAL_VREFANALOG) \
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- (int32_t) *TEMPSENSOR_CAL1_ADDR) \
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) * (int32_t)(TEMPSENSOR_CAL2_TEMP - TEMPSENSOR_CAL1_TEMP) \
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) / (int32_t)((int32_t)*TEMPSENSOR_CAL2_ADDR - (int32_t)*TEMPSENSOR_CAL1_ADDR) \
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) + TEMPSENSOR_CAL1_TEMP \
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)
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/**
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* @brief Helper macro to calculate the temperature (unit: degree Celsius)
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