esp-idf/components/esp_driver_sdmmc/README.md

SDMMC Host Driver

SD Host side related components are:

• sdmmc
• esp_driver_sdmmc (current component)
• esp_driver_sdspi

For relationship and dependency among these components, see SD Host Side Related Component Architecture.

esp_driver_sdmmc components holds SDMMC Host driver for ESP SDMMC peripheral, this driver provides APIs to help you:

• do SD transactions (under SD mode) via ESP SDMMC peripheral.
• tune ESP SDMMC hardware configurations, such as clock frequency, bus width, etc.
• ...

You can

• use this driver to implement sdmmc protocol interfaces
• directly use esp_driver_sdmmc APIs

to communicate with SD slave devices under SD mode.