esp-idf/components/esp_driver_sdspi/README.md

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# SDSPI Host Driver
SD Host side related components are:
- `sdmmc`
- `esp_driver_sdmmc`
- `esp_driver_sdspi` (current component)
For relationship and dependency among these components, see [SD Host Side Related Component Architecture](../sdmmc/README.md).
`esp_driver_sdspi` components is a driver based on ESP GPSPI master driver to help you:
- do SD transactions (under SDSPI mode) via ESP GPSPI peripheral.
- tune ESP GPSPI hardware configurations, such as clock frequency, bus width, etc.
- ...
You can
- use this driver to implement `sdmmc` protocol interfaces
- directly use `esp_driver_sdspi` APIs
to communicate with SD slave devices under SDSPI mode.