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anasba · 2024-05-06

Hello, I am trying to calculate the internal CPU temperature on an STM32H743, When reading the internal CPU temperature sensor using ADC3 IN18 (internal temperature), I get a very high value (~731C)The formula I'm using is the following :Temperature...

anasba · 2024-05-14

I have an idea which might explain where the issue comes from.Here are the details :The project is built on a STM32H743 .ioc project.The PCBA we use is a STM32H750.Will that influence the CPU sensor calibration/acquisition ?Many thanks

anasba · 2024-05-07

@AScha.3 I've checked VREF+ and VDD with DMM VREF+ = 3.0 VVDD = 3.36 VI've changed the ADC settings to OVERRUN DATA OVERWRITTEN with :hadc3.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;and it didn't fix it Any ideas ?

anasba · 2024-05-06

@AScha.3, appreciate the fast repliesI define :CALIBRATION_REFERENCE_VOLTAGE as 3.3VREFERENCE_VOLTAGE 3.0V // supplied with Vref+ or VDDAThen : adcCalTemp30C = (float) (*ADC_TEMP_3V3_30C) / (REFERENCE_VOLTAGE/CALIBRATION_REFERENCE_VOLTAGE);adcCalTemp...

anasba · 2024-05-06

Dear @AScha.3,With the following ADC value inside DMABuff (0x7f08): I getTemperature = 734 C°ADC (in mV) = 2413.89 adcCalTemp30C = 13 820adcCalTemp110C = 18 233

anasba · 2024-05-06

@AScha.3 It is still showing the same output even thought I enabled TSEN ADC3_COMMON->CCR |= ADC_CCR_TSEN;HAL_ADCEx_Calibration_Start(&hadc3,ADC_CALIB_OFFSET_LINEARITY, ADC_SINGLE_ENDED);Any ideas ? many thanks

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