AD2.rar_voltmeter

#include <stc54.h> #include <absacc.h> unsigned char i,j,k,m,n; unsigned char x[16]= { 0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8, 0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e }; void delay1ms(void) { unsigned char a,b; //for(a=2;a>0;a--) for(b=125;b>0;b--); } void main(void) { P20=0; for(;;) { P34=0; //关显示 P35=0; for(i=0x15;i>0;i--)delay1ms(); //delay 20ms k=XBYTE[0xfe00]; //保存A/D转换结果 m=k&0x0f; P35=1; P34=0; P1=x[m]; //P1口输出显示低位LED delay1ms(); m=k&0xf0; m=m>>4; P35=0; P34=1; P1=x[m]; //P1口输出显示高位LED delay1ms(); } }