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STM32F767Zi-Nucleo SDMMC DMA Write help

Question asked by Looke Jean on Feb 20, 2018
Latest reply on Mar 2, 2018 by Clive One

Hi

I'm testing F767Zi-Nucleo to write some data to a 16G SD card with no file system.

 

With HAL_SD_WriteBlocks function, everything works fine.

I can read out the data that just have been wrote.

 

With HAL_SD_WriteBlocks_DMA function, no error during excution.

But I can only read out 0x00 in the data block that just been wrote before.

 

SDMMC controller clock frequency is 4 MHz.

 

SDMMC1 and SDMMC2 are tested and they both have this problem.

 

Has anyone encountered same situation? Need help.

Thanks a lot.

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