Based on ST' s STM32 family of MCU' s coomplete SD CARD driver source code, very useful

BSTM32_SD_CARa\STM32_SD_CARD SOUECE\src\sdcmd.c
..............\....................\...\sdcrc.c
..............\....................\...\sddriver.c
..............\....................\...\sdhal.c
..............\....................\...\SD_Driver.c
..............\....................\...\SD_User_API.c
..............\....................\src
..............\STM32_SD_CARD SOUECE
BSTM32_SD_CARa

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