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R
rohan_m
Explorer II
March 8, 2024
Solved

SD_CARD refuses to mount with fmount returning FR_NOT_READY

  • March 8, 2024
  • 1 reply
  • 2807 views

STM32F7 Series

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    This topic has been closed for replies.
    Best answer by rohan_m

    I reduced the speed of the SDcard to 400kHz and mounted it on a nucleo board. Still did not do it on the custom board. I now have the feeling something is not right with the custom board. 

    1 reply

    M
    mƎALLEm
    Technical Moderator
    March 8, 2024

    Hello,

    Try with 1 bit mode. If it does work see this thread.

    R
    rohan_mAuthor
    Explorer II
    March 8, 2024

    The code fails only after :-

     if (HAL_SD_Init(&hsd) != HAL_OK)
 {
 Error_Handler();
 }
    It fails in the HAL_SD_Init() only even after changing to 1B. 
    A
    AScha.3
    Super User
    March 8, 2024

    So your hardware is not working .

    What board : custom or nucleo ...?

    Length of tracks cpu -- sdcard ?

    +

    try simple setup for beginning with sd-card:

    - 1 bit mode

    - no dma template

    - port/pins : all on speed: medium + pullup on

     

     

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