STM32F030 ADC Unit not working properly

[Ario87]

Hi
I have designed a hardware to read 4 dc currents and 4 dc voltages using ADC unit of STM32F030K6T6. Analog voltage or current is read in 12-bit resolution using DMA to transfer data directly from peripheral to memory. Some calculations are done on data received from ADC to get the desired value and then data is sent to PC using UART and RS485 interface. 5 first channels (ADC0 to ADC4) are working properly but other 3 channels (ADC5 to ADC7) read wrong data (output value starts from 0 and increases gradually with a distinct step for each channel regardless of MCU pin voltage). Calculations for Voltage channels (ADC0/2/4/6) or Current channels (ADC1/3/5/7) are the same.
Also I've checked hardware and voltage or current levels are correct.
The code is attached.
Thanks to anyone who can help about this problem.

 

[aliarifat794]

The following links may help you to troubleshoot your code:

STM32-Projects/std library/stm32f030 dev/ECS0023 - STM32F0 - ADC example STM32F030F4 _stdlib/Release/ECS0023 - STM32F0 - ADC example STM32F030F4 _stdlib.elf at master · Ribster/STM32-Projects

Projects containing an ARM microcontroller from STM - Ribster/STM32-Projects

github.com

How to use ADC with STM32? - The Engineering Projects

Today, we are going to have a look at How to perform an Analog to Digital Conversion(ADC) in STM32 Microcontroller. STM32 ADC operations ...

www.theengineeringprojects.com