Read all ADC channels triggered by a timer and use DMA - NucleoC031C6

[stm32user2]

Hi All, 

I want to read all ADC channels from the nucleo c031C6 using DMA all channels should be read continuously. For example 1k samples per seccond. I have tried to configure lots of different approaches in the CubeMX, but I can not figure it out. 

Can anyone give me a hint on how to set ADC and DMA settings in CubeMX? 

Cheers

[SofLit]

Hello @stm32user2 and welcome to the community,

You need to show what you have done at this stage: share your code, your ioc file etc.. to let others guide you to the solution.

Tips on posting a thread.

Thank you.

[Hl_st]

Hello, 

I am sending simple example which periodically (1kHz) read all analog inputs and each values writes to memory by DMA and periodically print read values from memory to usart.

ADC was configured:

- All inputs except IN2, IN3 (pins used by usart), Temperature sensor, Vrefint Channel, VDDA Channel, VSSA Channel

- 8 bit resolution

- DMA Continuous Requests Enabled

- External trigger conversion source as Timer 3 Trigger Out event

- Other configurations stay as defaults

- DMA mode circular, Peripheral to memory, Data Width as Byte

TIM3 is configured as:

- Clock Source as Internal Clock

- Counter Period to 47 999

- Trigger Event Selection TRGO as Update Event

SYSCLK was configured to 48 MHz