Associate

Question

STM32L4 SDMMC Peripheral Problem

hello,

I use a custom board with an MCU STM32L462VETX and i try to create a file system over an SD CARD using the SDMMC peripheral .

the hardware connection between the sd card and the MCU are the same the eval board : STM32L476G-EVAL

I use a sandisk 16go sd card

I have used the STM32L4Cube V1.16 and CubeMX6.1.1

The problem :

the f_open and f_mount with forced mount option return FR_DISK_ERR always

i checked also the community questions and topics like the problem of delay after power on in HAL driver.

So i search any idea or a support to resolve this problem because we must use the sd card to save data in our project.

#SDMMC #FatFS

This topic has been closed for replies.

Associate III

Exactly the same problem with my Nucleo-L452RE.

I'm start thinking that there is some issue using L4 and sdmmc

Guru

Definitely works on the NUCLEO-L452RE

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Associate

can you share your project in gihub please?

and can you tell us the steps to get sdmmc with dma work please ?

Associate III

Do you have a right clock setup?

Associate

yes , i use under 10 Mhz for sdmmc (using the divider ) i tried many clocks

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