stm32f407 SDIO and USART together

[xt]

when I use the usart6's DMA, my SDIO can't write to the SD card properly

[Andrew Neil]

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PS:

Does it work if you use USART6 without DMA ?

[xt]

if I don't use USART6'DMA ,I can write to SD card normally. But,if I use the USART's DMA ,When I write to SD,it will loss many data

[Andrew Neil]

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@xt wrote:

if I don't use USART6'DMA ,I can write to SD card normally. 

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Just to be clear: It does work when you use USART6 - just so long as you don't use DMA with it?

Are you using DMA with the SDIO ?

[Tesla DeLorean]

What does this mean? It trashes the file system on the card making it unreadable or just corrupts the file contents of what you are logging?

Do they share resources or channels? I don't recollect there being a problem on this platform.

Debug the issue.

[xt]

just loss data in sd card