数字电压表程序

课程设计数字电压表程序#include // #define uchar unsigned char sbit sda=P2^7; //数据线 sbit scl=P2^6; //信号控制线 sbit key1=P1^3; sbit relay=P1^1; uchar a; bit wl; uchar led_discode[11]={0xc0,0xf9,0xa4,0xb0,0x99, 0x92,0x82,0xf8,0x80,0x90,0xff}; void delay() { ;; } void start() //开始信号 {