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47ba4d639a
ACMD41 argument is different between SD mode and SPI mode.
In SPI mode, the only non-zero bit may be the HCS bit. Unlike the SD
mode, the bits reflecting the host's OCR should be zero.
Previously, we used to set these bits the same way as for the SD mode.
This has caused certain cards to fail initializing, apparently their
controllers have checked the ACMD41 argument more strictly and refused
to finish initialization, resulting in an error such as
sdmmc_common: sdmmc_init_ocr: send_op_cond (1) returned 0x107
(Note that this error may have other causes than the one fixed in
this commit. For example, if the card doesn't have a sufficient and
stable power supply, it may also fail to complete the internal
initialization process, and will never clear the busy flag in R1
response.)
Closes https://github.com/espressif/esp-idf/issues/6686
Closes https://github.com/espressif/esp-idf/issues/10542
SDMMC Protocol Layer Driver
SD Host Side Related Component Architecture
Architecture Graph
┌─────────────────────────────────────────────┐
│ │
│ SD Protocol Layer Driver: components/sdmmc │
│ │
└──────────▲────────────────────▲─────────────┘
│ │
│ │
Implements │ │ Implements
│ │
┌──────────────────────────────────┴─────┐ ┌────┴───────────────────────────────────┐
│ │ │ │
│Host Driver: components/esp_driver_sdmmc│ │Host Driver: components/esp_driver_sdspi│
│ │ │ │
└────────────────────────────────────────┘ └────────────────────────────────────────┘
Components
sdmmc: SD protocol layer driver, it provides SD protocol related definitions and interfaces. With corresponding implementation drivers,sdmmcAPIs can help you:- send commands to slave devices
- send and receive data
- handle error conditions within the bus
esp_driver_sdmmc: SDMMC Host driver for ESP SDMMC hardware, it implements thesdmmcprotocol interfaces.esp_driver_sdspi: SDSPI Host driver for ESP GPSPI hardware, it implements thesdmmcprotocol interfaces.
Dependency
esp_driver_sdmmcis in driver layer (G2), it relies onsdmmcesp_driver_sdspiis in driver layer (G2), it relies onsdmmcsdmmcdoes not and should not rely onesp_driver_sdmmcoresp_driver_sdspi. Thoughsdmmcis independent, it still stays in G2.