AnsweredAssumed Answered

SDIO(FatFS) File open(write) problem

Question asked by Kim KyungTack on Apr 3, 2018
Latest reply on May 9, 2018 by Clive One



At the first time, SDIO works well but 10~20 minutes later, when i try to open a file(FA_CREATE_NEW | FA_WRITE options), there is no answer for 30 seconds and then SDIO does not work anymore after being shown FR_DISK_ERR.


Through debugging, I found that SDIO doesn't work as soon as the osMessageGet called on SD-Write function (osMessageGet result is osEventTimeout).


This problem disappears when the SDIO clock speed is lowered (ClockDiv is 8 or more). However, the Read/Write speed get very slow too much than i want.



STM32F429 use

CubeMX 4.25.0

STM32CubeF4 Firmware Package v1.21.0

FreeRTOS 9.0.0 (CMSIS 1.02)

FatFS R0.12c



SDIO Settings (DMA used)