Microchip公司PIC18F4550芯片的USB firmware代码，我在压缩包中添加了jpg格式的硬件连接原理图和MPLAB IDE下的config bits配置图，希望对大家有用。-Microchip PIC18F4550 chip USB firmware code, I compressed add the jpg format connectivity hardware schematics and MPLAB IDE config bits of maps, useful f

这是基于PIC18F4550开发的USB的演示固件 ，使用MPLAB+C18开发环境，配合Microchip的MCHPFSUSB开发板使用。-This is based on the PIC18F4550 development demonstration USB firmware, use the MPLAB+ C18 development environment, coupled with Microchip' s development boards MCHPFSUSB use.