使用PIC芯片通过SPI-MODE读写SD存储卡,通过测试.-use PIC chip SPI-MODE SD memory card reader, to pass the test.

Designing and programming a USB mass-storage device or embedded USB host involves a variety of interfaces, protocols, and structures. Every USB mass-storage device must support two interfaces: • A USB device interface to enable the device

SD-USB SPI读写方案开发c代码~-SD-USB read and write SPI program development of C code

U盘/SD卡读写例程，使用SPI和UART接口编写-U disk/SD Flash RW access demo，with SPI & UART interface