SDIO FATFS SDMMC_ERROR_COM_CRC_FAILED

Hello,

I am using a STM32F411 with SDIO (4bit) and fatfs

When reading block I have regular SDMMC_ERROR_COM_CRC_FAILED error, from

SDMMC_GetCmdResp1 function.

What could be the reason for such error ? thanks

Vincent

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Guru

Data corruption on the wire?

Signal integrity, cross talk..

Data and command line should have pullup resistors, line lengths relatively consistent.

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Guru

Data corruption on the wire?

Signal integrity, cross talk..

Data and command line should have pullup resistors, line lengths relatively consistent.

Tips, Buy me a coffee, or three.. PayPal Venmo (See Profile) Up vote any posts that you find helpful, it shows what's working..

Senior

I fixed the issue by changing the ClockDiv from 0 to 2

Vincent

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