a project in Keil for the lpc1768 micro controller for calculating speed of the quadrature encoder , and connect via usb in Hid , with bulk transfer, and using a timer for Adc , to taking some conversion in every 20 msec

USB下载程序的固件及例程（适用MINI): 此工程是作为利用USB下载的固件，目录下还有一个适合用USB下载的例程。-USB download the program s firmware and routines (MINI): this project is used as the use of USB download the firmware, the directory also has a suitable USB download routines.