基于单片机的SD卡读写程序，有很详细的解释，大家可以下载。-Based on the SD Card Reader SCM procedures, had a very detailed explanation, you can download.

在nxp lpc21xx 中使用SPI进行SD读写的测试程序, 同时还可以在PCF8833上显示-The use of SPI in the nxp lpc21xx reading and writing test procedures for SD, but also can display PCF8833