Pointer to cyclic buffer at stm32H7A3

[hroze.1]

I am running ADC DMA in cyclic mode
at STM32G474CET6  Im useing
Buffer_Addr_At_Trigger[ ADC_Loop_Counter] = hdma_adc1.Instance->CNDTR;
to read the pointer of the cyclic buffer
In the STM32H7 family
An syntax error for CNDTR

I can't find the appropriate register in the documentation

Thanks

Haim

[liaifat85 · Accepted solution]

Looks like In the STM32H7 family, the register you are looking for is different from the STM32G4 series. You can check the datasheet:https://www.st.com/resource/en/datasheet/stm32h743vi.pdf

[Tesla DeLorean]

Reference Manual for the DMA units and register details   https://www.st.com/resource/en/reference_manual/rm0455-stm32h7a37b3-and-stm32h7b0-value-line-advanced-armbased-32bit-mcus-stmicroelectronics.pdf

The IDE should also let you drill down into the structures and field names. H7's can be more picky about the DMA units, and attached memories, so watch that.

[STTwo-32]

Hello @hroze.1 and welcome back to the ST Community 😊.

from what I understood from your question. I see that you are looking for the equivalent of the "DMA_CNDTRx" register in the DMA registers with the STM32H7A3. This register is the "DMA_SxNDTR" as you can find in the RM0455.

Best Regards.

STTwo-32