ST NUCLEO-U083RC uses ADC to read accurate voltage values and chip temperature

crz_21

ST NUCLEO-U083RC uses ADC to read accurate voltage values and chip temperature [Copy link]

1. Build the engineering process

1. Select the corresponding chip

2. STM32CubeMX options are as shown below

2. Experimental Description

Because the reference voltage for this sampling uses the internal reference voltage of the microcontroller, it is necessary to first find the factory reference voltage coefficient in the location specified by the microcontroller flash manufacturer in the data sheet, and then calculate the actual sampling voltage according to the formula in the user manual.

3. Experimental Phenomenon

The vol_val printed in the serial port is the sampling voltage. VEREFINT_CAL should have been the factory coefficient read from the chip 0x1FFF6EA4-0x1FFF6EA5, but for some reason the value read by the MCU on the development board was 0xFFFF, so a coefficient read from another MCU was written as the coefficient of this MCU.

littleshrimp

How many degrees does the temperature 187 correspond to?