微机接口芯片8255 8254 ADC0809的实验-interface chip microcomputer 8255 8254 Experimental ADC0809

编写C语言代码 实现ADC0809 模拟信号转化成数字信号 并使用Proteus进行仿真,The preparation of C language code implementation ADC0809 analog signal into digital signal and the use of Proteus simulation

PDIUSBD12的与上位机通过USB通信的代码，基于51内核，经典菜鸟学习USB的程序-PDIUSBD12 with the host computer through the USB communication code, based on 51 core, the classic rookie USB study procedures

PDIUSBD12固件编程简单实例，USB设备配置后，使与P1口连接的LED全亮-PDIUSBD12 s easy firmware programming example, the LED lights that are connected with P1-wide will be lighted after usb device is configurated.

1)设计ADC0809与8086CPU的硬件连接图，分配ADC0809的基地址为0FF00H。 2)设计制作一个数字电压表，测量0~5V，结果显示于数码管上。-1) design ADC0809 8086CPU hardware connection diagram, the base address for the allocation ADC0809 0FF00H. 2) design a digital voltmeter, measure the 0 to 5V, the resul