这是南京沁恒的高速U盘SD卡控制芯片CH378的驱动程序。可以实现U盘和SD卡的读写，硬件SPI和软件模拟SPI的例程都有，并且把读写的结果通过串口输出，可以直接应用。-This is the Nanjing Qin Heng high-speed U disk SD card control chip CH378 driver. Can realize U disk and SD card read and write, hardware SPI and software simulation