Dear Forum,
I am trying to attach my SD Card using direct wiring, so no Core Board to host the STM32F4 Disc Board.
For this I connected the SD Card Holder as written in red into the scheme, but Mios_Studio keeps on telling me, that no SD Card is found…
Any help is appreciated, thanks!
Emre
Hi,
nothing special needs to be considered at the HW side, but it’s important that you upload an application which supports SD Cards, such as MIDIbox NG.
Best Regards, Thorsten.
Thanks for jumping in TK!
I just installed NG, but there is no sign of the default files and also the message of the missing SD Card:
Also the File Browser tells me, there is nor SD Card mounted (tried formatting the card both as MS-DOS Fat and ExFAT…)
So I must have done something wrong in the wiring though I checked many times, or my brand new SD Card Adapter is somehow broken…
OK, found out what the problem is:
Whether I read the connection scheme wrong or there is a mistake:
DO has to go to PIN PA6
DI has to go to PIN PA7
so these two have to be switched…
Alright, now I see the problem - the notation for the “Connections to Pins on STM32F4 DiscBoard” has been added by yourself, and I agree, that the data input of the SD Card has to be connected to the serial data output of STM32F4, and vice versa.
Compare with the MBHP_CORE_STM32F4 schematic: http://www.ucapps.de/mbhp/mbhp_core_stm32f4.pdf
SDCard J1 DI -> MBHP_CORE_STM32F4 J16 SO (-> PA7)
SDCard J1 DO -> MBHP_CORE_STM32F4 J16 SI (-> PA6)
Problem solved 
Best Regards, Thorsten.
Yep, the notes in the first post are wrong, obviously did a mistake. I will delete the file so it does not led to future misleading of other reader…
Thanks TK!
