stm32H723 (nucleo) with SDMMC, FR_NOT_READY

[Tbill.1]

I'm stock since a while now.

I use H723 nucleo board with a SD card socket, build for SPI, but I use it as SDMMC with 1bit wide.

this socket is ok with SD and SPI.

f_mount send FR_NOT_READY.

I have the same answer with or with out Sd card...

I use a logic analyser and I can see that the clock never stop after start

is anybody have a clue or a simple working project with H723 and SDMMC ?

[Tbill.1 · Accepted solution]

It's working now, I make a(classic) mistakes : sd detection !