stm32f722ze SDIO connection Problem .SD card not detected. CD is ignored and not connected

[MMARI.1]

trying to connect sd card with stm32f722ze SDIO 4 bit method . but still i couldn't succeed in sd card detection . sd card socket CD pin i ignored and not connected with any pin . I need to know CD-card detection is important ? . and which repository examples having sdio 4 bit example?

[MMARI.1]

Oops ! Single bit connection is working . let me change change sd card socket and come back to you on 4 bit mode .

[KDJEM.1]

Hi @MMARI.1​ ,

Is your project generated with STM32CubeMX?

If yes, could you please check that the workaround provided in this thread: SDCARD does not work (FR_NOT_READY) when migrating from FW_F4 V1.27.0 to newer FW_F4 V1.27.1.

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Kaouthar

[MMARI.1]

currently 1(singel) bit SDIO working & 4bit sdio not working .

i am using cube ide and i have changed the SD card socket .

On stm32f7xx_hal_sd.c i have modified code from  Init.BusWide       = SDMMC_BUS_WIDE_1B; to  Init.BusWide       = SDMMC_BUS_WIDE_4B; still 4bit sdio is not working . Any one please check with Nucleo - f722ze with sdio 4 bit at your technical Centre and update me where i need to modify the code . i think this problem occurrence due to recent firm ware migration .

[Tesla DeLorean]

Review the schematic, check for and remove stubs.

33 or 47K pull-ups on the Dx and CMD wires?

Dial back the slew speed, significantly.

[MMARI.1]

I am using 4.7k pull-ups and checked wiring end to end the many time​s found it's ok. Since single bit sdio is working so I don't think connection having problem. Can any one please confirm with technical centre problem which is I am facing.
Regards
Madhavan

[MMARI.1]

can any one share with me the old firmware !!!!!! stm32f7xx_hal_sd.c !!!!!!!!!! file then i can understand where exactly i need to modify the code !. or working file of 4bit SDIO stm32f7xx_hal_sd.c file