usb,i2c,isp转换器，原理图，源码及开发笔记-usb, i2c, isp converter schematics, source code and development notes

example of conversion of CDC device in interface USB_SPI on the at91sam7s chips

我自己写的．在stm32f103c8上实现ＵＳＢ稳定通信．该项目很简单．根据ＵＳＢ上获取的命令通过ＳＰＩ接口与外部设备操作．请使用该ＵＳＢ程序时写出出处．谢谢！-I wrote it myself. USB to achieve stability in the stm32f103c8 communication. The project is simple. Acquired under the USB command on the

硬件标准SPI串行连接的硬件抽象层 V1.0 */ 提供I/O接口子程序,提供寄存器级读写子程序 -Standard SPI serial connection hardware Hardware Abstraction Layer V1.0*/provide I/O interface to subroutine, read subroutine register-class