About Matthew Staben

Matthew Staben · 2019-09-26

After using FatFS to create and time-stamp a directory on an SD card, when viewing the results using the command prompt to list the contents of the directory, the first two files shown are always the '.' and '..' entries. These are not getting time-s...

Matthew Staben · 2019-10-03

I too was affected by this problem using the STMF767.Can anyone point me to the exact fix that ST plans to use for the STMF7 series?

Matthew Staben · 2019-09-26

Actually, the directory was created and f_utime applied and is reflected in the time/date shown next to the directory name which is, in my case, within the root directory. The time functionality is working just fine. I will see if I care to patch ...

Matthew Staben · 2019-09-23

Got it. Thanks for pointing that out.

Matthew Staben · 2019-09-23

0x76 is not 120. I noticed that SDMMC_INIT_CLK_DIV is set to 0x76 which does not evenly divide into 48Mhz as does 0x78 (120) making 400Khz.

Matthew Staben · 2018-10-01

We use a card detect circuit so to avoid attempting comm. if there's no card present.

User statistics

User Activity

FatFS + SD + f_utime = not setting the timestamp on the previous ".." and current "." directory name in the subdirectory when listed in the command prompt .

Re: STM32L4 SDMMC Command Timeout

Re: FatFS + SD + f_utime = not setting the timestamp on the previous ".." and current "." directory name in the subdirectory when listed in the command prompt .

Re: STM32L4 + SD + STM32CubeMX v5.0.0: SD clock speed during call to SDMMC_CmdSendSCR (as part of switch to 4-bit bus) is too fast for many SD cards

Re: STM32L4 + SD + STM32CubeMX v5.0.0: SD clock speed during call to SDMMC_CmdSendSCR (as part of switch to 4-bit bus) is too fast for many SD cards

Re: What is the proper method to re-initialize SD card interface to support removal/reinsertion of SD card?