STM2F4 Discovery - Fatfs / SD Card / SDIO

FatFs 를 STM32F4

디스커버리 보드에서

작동할 때 안되는 경우

풀업 저항을 아래처럼

연결해 준다

STM2F4 Discovery - 

Fatfs / SD Card / SDIO

NO NEED FOR PULL UP REGISTER!!!!!!!!!!!!

SHORTEN WIRE LENGTH LESS TAHN 5 CM!!!!!

풀업 저항 붙이지 말고

와이어 길이를 5센티 이하로

초기에 22센티여서 문제였음

stm32f4discovery fatfs sdio FR_NOT_READY or mount error

http://stm32f4-discovery.com/2014/07/library-21-read-sd-card-fatfs-stm32f4xx-devices/

https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=https%3a%2f%2fmy%2est%2ecom%2fpublic%2fSTe2ecommunities%2fmcu%2fLists%2fcortex_mx_stm32%2fSDIO%20and%20SD%20fat%20access%20example&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&currentviews=13775

We need pull up register of 47K for D0/D1/D2/D3/CMD

SDIO case

SPI case