2021-03-14 09:57 PM
I use CMSIS to write program that transfer data from SD card through SDIO. For my task i need 4bit mode, but it isn't working. When i try to read some block from SD card STBITERR bit in SDIO_STA register goes high, that means that start bit hasn't been detected on all data lines. But when i use 1bit mode all works fine.
MCU: STM32F407VGT6
How to fix this problem?
2021-03-14 11:43 PM
Check wiring, socket and pull ups.
Show parts and circuit
Try other known working examples.
2021-03-14 11:55 PM
I am using devebox board, it has soldered socket, so wiring is not a problem.
I use internal pull-ups that should work. And i tried some other working examples, but it didnt work too.
2022-11-30 02:27 AM
have you resolve your problems?