serial communication with PIC and graph f(t)

PIC单片机连接LCD 1602显示屏，通过此代码，可以成功连接PIC16F877单片机，使得成功显示A\B\C\D\E\F\G(PIC microcontroller connect LCD 1602 display)

PIC Ad转换程序实现A/d转换功能，A/d采用中断方式。该程序通过单片机的RA2模拟通道送入一直流电压(PIC Ad conversion program to achieve A/d conversion function, A/d interrupt mode. The program sends a DC voltage through the RA2 analog channel of the microcontroller.)

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