Module ext_csd 

Extended CSD (EXT_CSD) register parsing for eMMC / MMC cards.

EXT_CSD is a 512-byte register read with CMD8 (SEND_EXT_CSD, R1 + 512-byte data block) on MMC cards. Only a small subset of fields is consumed by this driver today; the parser exposes the ones that drive bring-up decisions (capacity, supported timing, current bus width).

Structs

DeviceType

DEVICE_TYPE (EXT_CSD[196]) decoded into supported high-speed modes.

ExtCsd

Lightly typed view over the 512-byte EXT_CSD payload.

Enums

MmcBusWidth

Currently selected MMC bus width, decoded from BUS_WIDTH (EXT_CSD[183]).

MmcTiming

Currently selected MMC timing mode, decoded from HS_TIMING (EXT_CSD[185]).