SourceVuESP-IDF Framework and ExamplesESP-IDFsdmmc_ssr_t

sdmmc_ssr_t struct

Decoded values from SD Status Register Note: When new member is added, update reserved bits accordingly

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Summary

Declaration

typedef struct { uint32_t alloc_unit_kb: 16; uint32_t erase_size_au: 16; uint32_t cur_bus_width: 2; uint32_t discard_support: 1; uint32_t fule_support: 1; uint32_t erase_timeout: 6; uint32_t erase_offset: 2; uint32_t reserved: 20; } sdmmc_ssr_t;

Fields

Field

Declared as

Description

sdmmc_ssr_t::alloc_unit_kb

uint32_t: 16

Allocation unit of the card, in multiples of kB (1024 bytes).

sdmmc_ssr_t::erase_size_au

uint32_t: 16

Erase size for the purpose of timeout calculation, in multiples of allocation unit.

sdmmc_ssr_t::cur_bus_width

uint32_t: 2

SD current bus width.

sdmmc_ssr_t::discard_support

uint32_t: 1

SD discard feature support.

sdmmc_ssr_t::fule_support

uint32_t: 1

SD FILE (Full User Area Logical Erase) feature support.

sdmmc_ssr_t::erase_timeout

uint32_t: 6

Timeout (in seconds) for erase of a single allocation unit.

sdmmc_ssr_t::erase_offset

uint32_t: 2

Constant timeout offset (in seconds) for any erase operation.

sdmmc_ssr_t::reserved

uint32_t: 20

reserved for future expansion.

References

from examples

sdmmc_ssr_t struct

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