2023-09-27 03:58 AM
Hello everyone!
I have started a small journey to try to get started with eMMC memory and are trying to get it working.The end goal is to have a USB HS mass storage device eMMC working with a file system. (32gb or more)
My current step that I'm stuck is where the "MX_SDMMC1_MMC_Init" fails.
Specifically to get the eMMC voltage level fails.
/* SEND CMD1 APP_CMD with voltage range as argument */
I have some theories what can be wrong but any help would be really useful 🙂
Code steps at failure
Hardware Setup
SD Breakout Connection
CubeMX Configuration
Software setup
2023-09-28 09:51 AM
Hi @bit-flipper
The forum moderator had marked your post as needing a little more investigation and direct support. An online support case has been created on your behalf, please stand by for just a moment and you will hear from us.
Regards,
Billy
2023-09-28 11:18 AM
I had similar problems with my STM32F407, the solution was to start with 1 bit and not 4 wide as my mmc did not support the 4 bits wide mode.