at91sam7a3 the sdcard routine, under the iar through debugging, can be used as a study reference

basic-sdcard-project-at91sam7a3-ek
..................................\at91sam7a3-ek
..................................\.............\basic-sdcard-project
..................................\.............\....................\main.c
..................................\.............\....................\basic-sdcard-project.eww
..................................\.............\....................\ewp
..................................\.............\....................\...\at91sam7a3-ek.ewd
..................................\.............\....................\...\at91sam7a3-ek.ewp
..................................\external_libs
..................................\.............\crc
..................................\.............\...\crc7.h
..................................\.............\...\crc-itu-t.h
..................................\.............\...\crc7.c
..................................\.............\...\linuxtypes.h
..................................\.............\...\crc-itu-t.c
..................................\resources
..................................\.........\iar
..................................\.........\...\at91sam9261-ek-norflash.mac
..................................\.........\...\at91sam9xe-ek-flash.mac
..................................\.........\...\at91cap9-stk-sdram.mac
..................................\.........\...\at91sam9g20-ek-sram.mac
..................................\.........\...\at91sam9261-ek-sdram.mac
..................................\.........\...\at91cap9-dk-sram.mac
..................................\.........\...\at91sam9260-ek-sdram.mac
..................................\.........\...\at91sam9rl-ek-sram.mac
..................................\.........\...\at91sam9rl-ek-sdram.mac
..................................\.........\...\at91sam9260-ek-norflash.mac
..................................\.........\...\at91cap9-stk-sram.mac
..................................\.........\...\at91sam7a3-ek-flash.mac
..................................\.........\...\at91sam9g20-ek-sdram.mac
..................................\.........\...\at91cap9-dk-bcram.mac
..................................\.........\...\at91sam9xe-ek-sram.mac
..................................\.........\...\at91sam9260-ek-sram.mac
..................................\.........\...\at91sam9263-ek-sdram.mac
..................................\.........\...\at91sam9xe-ek-sdram.mac
..................................\.........\...\at91sam7a3-ek-sram.mac
..................................\.........\...\at91sam9g20-ek-norflash.mac
..................................\.........\...\at91sam9261-ek-sram.mac
..................................\.........\...\at91sam9263-ek-sram.mac
..................................\.........\...\at91sam9m10-ek-sram.mac
..................................\.........\...\at91cap9-dk-ddram.mac
..................................\.........\...\at91sam9m10-ek-ddram.mac
..................................\.........\...\at91cap9-dk-sdram.mac
..................................\at91lib
..................................\.......\boards
..................................\.......\......\at91sam7a3-ek
..................................\.......\......\.............\board_memories.c
..................................\.......\......\.............\board.h
..................................\.......\......\.............\board_lowlevel.c
..................................\.......\......\.............\board_cstartup_iar.s
..................................\.......\......\.............\board_memories.h
..................................\.......\......\.............\at91sam7a3
..................................\.......\......\.............\..........\AT91SAM7A3.h
..................................\.......\......\.............\..........\flash.icf
..................................\.......\......\.............\..........\sram.icf
..................................\.......\peripherals
..................................\.......\...........\dbgu
..................................\.......\...........\....\dbgu.c
.........................

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