51单片机ADC0831采样程序

#include <reg52.h> #include <intrins.h> sbit ADC_CS = P3^4; sbit ADC_CLK = P3^5; sbit ADC_DO = P3^6; sbit P2_0 = P2^0; sbit P2_1 = P2^1; sbit P2_2 = P2^2; sbit P2_3 = P2^3; unsigned char Read_ADC(); void delay1ms(int n); unsigned char code TAB[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82 ,0xf8,0x80,0x90}; unsigned char code DP_TAB[10]={0x40,0x79,0x24,0x30,0x19,0x12,0x02 ,0x78,0x00,0x10}; unsigned char ledbuff[4]={0xc0,0x40,0xc0,0xc0}; void Timer0_Init() { EA = 1; TMOD = 0x01; TH0 = (65536 - 10000)/256; TL0 = (65536 - 10000)%256; TR0 = 1; ET0 = 1; } void main() { float adc_vol = 0; int adc_tmp = 0; Timer0_Init(); while(1) { adc_vol = (5.0*Read_ADC())/255; adc_tmp = (int)(adc_vol*1000); // adc_tmp = Read_ADC(); ledbuff[3] = TAB[adc_tmp/1000]-0x80; ledbuff[2] = TAB[adc_tmp/100%10]; ledbuff[1] = TAB[adc_tmp/10%10]; ledbuff[0] = TAB[adc_tmp%10]; delay1ms(100); } } unsigned char Read_ADC() { unsigned char i,temp = 0; EA = 0; ADC_DO = 1; _nop_(); _nop_(); ADC_CS = 0; _nop_(); _nop_(); ADC_CLK = 1; _nop_(); _nop_(); ADC_CLK = 0; _nop_(); _nop_(); for(i=0;i<8;i++) { ADC_CLK = 1; _nop_(); _nop_(); if(ADC_DO) { temp |=0x01; } temp <<= 1; ADC_CLK = 0; _nop_(); _nop_(); } ADC_CS = 1; _nop_(); _nop_(); EA = 1; return temp; } void interrupt_time0() interrupt 1 { static char i = 0; TH0 = (65536 - 10000)/256; TL0 = (65536 - 10000)%256; P2 = 0xff; switch(i) { case 0: P2_0=0;P2_1=1;P2_2=1;P2_3=1;P0 = ledbuff[3];i++;break; case 1: P2_0=1;P2_1=0;P2_2=1;P2_3=1;P0 = ledbuff[2];i++;break; case 2: P2_0=1;P2_1=1;P2_2=0;P2_3=1;P0 = ledbuff[1];i++;break; case 3: P2_0=1;P2_1=1;P2_2=1;P2_3=0;P0 = ledbuff[0];i=0;break; default: break; } } void delay1ms(int n) { int i,j; for(i=0;i<n;i++) for(j=0;j<123;j++); }