STM32MP157CAA3 Not Boot By SDCARD

[Lkiwo.1]

My STM32MP157CAA3 Board Not Boot By SDCARD

I already check SDCARD Clock Pin .. ...

reset MCU and i check SDCARD Clock Pin ... but not signal ....);

I already check Boot MODE -> SDCARD

HELP ME...

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[Olivier GALLIEN]

Hi @Lkiwo.1​ 

If you SDCard is not clock I guess you have to check SDMMC1 clock is properly enable in TF-A device tree.

In case you didn't get access I point to you useful docs :

AN5031 Getting started with STM32MP1 Series hardware development

https://www.st.com/content/ccc/resource/technical/document/application_note/group1/b7/b5/ca/8e/93/20/42/0e/DM00389996/files/DM00389996.pdf/jcr:content/translations/en.DM00389996.pdf

https://wiki.st.com/stm32mpu/wiki/How_to_create_your_board_device_tree

https://wiki.st.com/stm32mpu/wiki/Clock_device_tree_configuration_-_Bootloader_specific

Hope it help

Olivier

[PatrickF]

If following are verified in the HW (assuming you did not change the OTP content):

• Boot[2:0] pins are set to SD-Card (0b010)
• VDD (and VDD_*** pins) and VDDCORE supplies are in the available range
• NRST and NRST_CORE are high

Whatever the SD-Card content or presence, a clock (about 16MHz) should appear on PC12 pin few ms after NRST rising and could stop after few tens of ms (first level boot).

Then the boot success (second level boot and so on) depend on SD-Card content.