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stm32-rs / stm32f7xx-hal

A Rust embedded-hal HAL for all MCUs in the STM32 F7 family
Apache License 2.0
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Add SDMMC support #31

Open thejpster opened 4 years ago

thejpster commented 4 years ago

I'd like to use the microSD slot on the STM32F7-Discovery board. This is connected to:

Pin GPIO Description
A12 PC12 SDMMC_CK
D12 PD2 SDMMC_CMD
G14 PC8 SDMMC_D0
F14 PC9 SDMMC_D1
B14 PC10 SDMMC_D2
B13 PC11 SDMMC_D3

I have an embedded-sdmmc crate, but that only handles SD cards connected to generic embedded-hal::spi devices. I'd like to add an implementation of the embedded-sdmmc::blockdevice::BlockDevice for the SDMMC peripheral on the STM32F7.

I'll try a few things out in my fork and send a PR once I think it's working.

systec-ms commented 2 years ago

I've been working on getting SD/SDIO/MMC card host interface (SDMMC) to work, didn't get done with it though until priorities shifted. Maybe someone would like to build on my previous work (which is predominantly on customizations of the stm32h7 hal implementation). The reading worked partially. https://github.com/systec-ms/stm32f7xx-hal/tree/sdmmc