这是基于arm9嵌入式微处理器s3c2440a，由广嵌开发的gec2440开发板上的sd卡的源程序，里面注解详细！-This is based on the arm9 Embedded Microprocessor s3c2440a, developed by the widely embedded development board gec2440 the source of the sd card, which notes in detail!