STM32H743 + more: DMA stream locked when transferring data to/from USART

[HelligeChris]

STM32H743 + more: DMA stream locked when transferring data to/from USART

[HelligeChris]

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Hey, I reformatted the issue, though the "Steps to reproduce" section leaves much to be desired...

[HelligeChris]

Hi @ajarmouni-st, from what I can see in the errata it shouldn't matter if it's a UART DMA transfer or DMA transfer to the DAC. Since both the UART and DAC request the DMA to transfer data, though we only noticed it when using the DMA to update the DAC while the also having the UART running.

This is properly because the DAC was requesting DMA transfers so quickly.

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[henrikbrixandersen]

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[ajarmouni-st]

Hi @HelligeChris

if a concurrent transfer occurs,

By this you mean another UART DMA transfer or another DMA transfer from any other device?

[ajarmouni-st]

Hi @HelligeChris

if a concurrent transfer occurs,

By this you mean another UART DMA transfer or another DMA transfer from any other device?

okey, I just noticed

we used a DMA to update DAC output at 1MHz

So it's the 2nd case right?