使用型号为CY7C68013A的USB芯片，通过开发板上的按钮控制LED灯的状态-This directory contains the dev_io 8051 firmware The purpose of this software is to demonstrate how to use the buttons and LED on the EZ-USB developer s kit. The device I/O example program uses

使用SL811+8051平台实现的USB HOST测试仪器，可以测试各种USB 设备的，支持最多2级HUB，带LCD显示屏，已经被大量生成使用；使用C语言开发，方便移植到 主流STM32F 平台。(USB HOST testing instrument using SL811+8051 platform can test all kinds of USB devices, support up to 2 HUB and LCD display, and have been used in lar