What is the DMA Usart received bits counter register?

I used DMA to read from USART, how can i know how many bytes are currently received by this and from which register i should read this number

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STTwo-32Best answer

ST Technical Moderator

Hello @unknown

For such a use case, you have to use the DMA_SxNDTR register, more details available on the 1.1.12 part of the AN4031.

Best Regards.

STTwo-32

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Lead

NDTR register is key.