Can the DMA memory generated by the DAC be accessed/read?

macam1 · ‎2024-12-11

Can the memory generated by DMA be accessed and used as data? And how?

SofLit · ‎2024-12-11

If you mean data transfer from memory to DAC with DMA, yes it's possible.

You didn't mention the exact STM32F4 part number.

This is for STM32F4x7 using DMA1:

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SofLit · ‎2024-12-11

Hello @macam1 ,

If you mean data transfer from memory to DAC with DMA, yes it's possible.

You didn't mention the exact STM32F4 part number.

This is for STM32F4x7 using DMA1:

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.

macam1 · ‎2024-12-11

thank you for your response, yes using stm32f405. can you give an explanation about this dma memory access, I'm so blind.

SofLit · ‎2024-12-11

What explanation you need?

You need to configure DMA and DAC especially to choose the correct DMA stream and DMA channel (see the figure I shared above).

Please refer to this example. It's using DMA and DAC for signal generation:

https://github.com/STMicroelectronics/STM32CubeF4/tree/master/Projects/STM324xG_EVAL/Examples/DAC/DAC_SignalsGeneration

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