STM32H723VE dma don't work with adc

[FAndr.1]

dma don't work with adc. After first writing dma set flag TEIF. Value wasn't written to buffer. I ported example (adc dma transfer) from stm32h743 to 723, it have this error too.

[Imen GH]

Hello,

Welcome to STM32 Community!

Have you tried the STM32CubeH7 firmware example?

I recommend you that you run and get inspired from ADC_DMA example code in STM32CubeH7 at this path:

STM32Cube_FW_H7_V1.8.0\Projects\STM32H743I-EVAL\Examples\ADC\ADC_DMA_Transfer

This example can help you. it describes how to configure and use the ADC to convert an external analog input and get the result using a DMA transfer through the HAL API.

Imen

[TDK · Accepted solution]

> After first writing dma set flag TEIF

Probably this:

https://community.st.com/s/article/FAQ-DMA-is-not-working-on-STM32H7-devices#:~:text=DMA%20is%20not%20working%20on%20STM32H7%20devices%2C%20or,transmitted%2Freceived%20data%20are%20corrupted.&text=The%20problem%20is%20related%20two,RAM%20for%20D1%2FD2%20peripherals.

[FAndr.1]

Thank you, its was first what I had do. Only replace *.ld and change RCC PLL config for my mcu and crystal. The result is the same - dma stopped after conversion starting with TEIF. I add my test project. Its new clear project with only adc + dma.

[TDK]

Your variables are in DTCM which is not accessible to DMA.

[FAndr.1]

Thank you, I read this article and tried off D-cache but it had no effect. I will try replace buffet to D2 RAM later.

[FAndr.1]

I thought,  disabling of D-cash should solve this problem. I have replace adc buffer to D2 ram and dma work now. Thank you

[Imen GH]

Glad to know your issue has been solved, and Thanks for sharing your update.