dyb.rar_双积分

#include<reg51.h> #include<math.h> #include <intrins.h> #define uint unsigned int #define uchar unsigned char sbit CD4051_1_A0=P2^0; sbit CD4051_2_A1=P2^2; sbit CD4051_2_A0=P2^3; sbit intwire=P3^2; sbit pd=P1^4; //判断是否引起中断 sbit lcden=P1^2;//液晶控制位 sbit lcdrw=P1^1; sbit lcdrs=P1^0; uchar code dis1[]= "current voltage"; uchar dis2[]= " "; uchar flag0,flag1,flag2,recode,a,b,c,d,e,num; uint sec; void delay(uint z) { uint x,y; for(x=z;x>0;x--) for(y=110;y>0;y--); } //忙检查 bit busy_check() { bit lcd_status; lcdrs=0; lcdrw=1; lcden=1; delay(1); lcd_status = (bit)(P0&0x80); lcden=0; return lcd_status; } //lcd写命令 void write_lcd_command(uchar cmd) { while(busy_check()); lcdrs=0; lcdrw=0; lcden=0; P0=cmd; lcden=1; delay(1); lcden=0; } //lcd写数据 void write_lcd_data(uchar dat) { while(busy_check()); lcdrs=1; lcdrw=0; lcden=0; P0=dat; lcden=1; delay(1); lcden=0; } //lcd初始化 void lcd_init() { delay(15); write_lcd_command(0x38); delay(5); write_lcd_command(0x01); delay(5); write_lcd_command(0x06); delay(5); write_lcd_command(0x0c); delay(5); } //设置显示位置 void set_lcd_pos(uchar p) { write_lcd_command(p|0x80); } //在lcd上显示字符串 void dis_lcd_string(uchar line,uchar *s) { if(line == 1) set_lcd_pos(0x00); else if(line ==2) set_lcd_pos(0x40); while(*s) { write_lcd_data(*s); s++; } } void init() { TMOD=0x01;//工作方式定时器0 TH0=0xfc;//置初值1ms TL0=0x18; EA=1; ET0=1;//定时器0中断允许位 PT0=0;//优先级设置 EX0=1; //开int0中断 PX0=1; intwire=1;//外中断管脚置1 IT0=1; //下降沿触发 TR0=0; flag0=0; // 标志位 flag1=1;// flag2=0; pd=1; //判断位 recode=0; //定时器用于计数位 } void main() { unsigned char i,j; uint V=0; i=0; init(); lcd_init(); while(1) { if(flag2!=0) { CD4051_1_A0=0; //打到2v档 } else { CD4051_1_A0=1; //flag==0打到200mv档 即引入放大10倍的电压 } CD4051_2_A1=0; //积分电容放电 CD4051_2_A0=0; if(flag0!=0) { i=recode; j=TH0; recode=0; flag1=1; flag0=0; if(flag2==0) //小量程 { V=i*25; if(V<=2065) { V=V-157; switch(V/100) { case 1: V=V-30 ;break; case 2: V=V-8 ;break; case 3: V=V ;break; case 4: V=V-4 ;break; case 5: V=V+3 ;break; case 7: V=V+8 ;break; case 8: V=V+9 ;break; case 10:V=V+14 ;break; case 11:V=V+46 ;break; case 12:V=V+49 ;break; case 14:V=V+56 ;break; case 15:V=V+61 ;break; case 17:V=V+63 ;break; case 18:V=V+68 ;break; } e=V%10; sec=V/10; d=sec%10; sec=sec/10; c=sec%10; sec=sec/10; b=sec%10; a=sec/10; flag2=0; dis2[1] = a+0x30; dis2[2] = b+0x30; dis2[3] = c+0x30; dis2[4] = d+0x30; dis2[5] = '.'; dis2[6] = e + 0x30; dis2[13]='m'; dis2[14]='v'; dis_lcd_string(1,dis1); delay(20); dis_lcd_string(2,dis2); delay(20); } else { flag2=1; } } if(flag2==1) //大量程 { V=i*250-1750; if(V>2065) { switch(V/100) { case 22:V=V-133 ;break; case 25:V=V-77 ;break; case 27:V=V-121 ;break; case 30:V=V-161 ;break; case 32:V=V-55 ;break; case 35:V=V-132 ;break; case 37:V=V-90 ;break; case 40:V=V-33 ;break; case 42:V=V+30 ;break; case 45:V=V-67 ;break; case 47:V=V-11 ;break; case 50:V=V+49 ;break; case 52:V=V-47 ;break; case 55:V=V+11 ;break; case 57:V=V+24 ;break; case 60:V=V+13 ;break; case 62:V=V+30 ;break; case 65:V=V+74 ;break; case 67:V=V+60 ;break; case 70:V=V+61 ;break; case 72:V=V+77 ;break; case 75:V=V+169 ;break; case 77:V=V+123 ;break; case 80:V=V+139 ;break; case 82:V=V+194 ;break; case 85:V=V+251 ;break; case 87:V=V+157 ;break; case 90:V=V+213 ;break; case 92:V=V+281 ;break; case 95:V=V+300 ;break; case 97:V=V+240 ;break; default:V=V+561; } e=V%10; sec=V/10; d=sec%10; sec=sec/10; c=sec%10; sec=sec/10; b=sec%10; a=sec/10; flag2=1; dis2[1] = a+0x30; dis2[2] = '.'; dis2[3] = b+0x30; dis2[4] = c+0x30; dis2[5] = d+0x30; dis2[6] = e + 0x30; dis2[13]='V'; dis2[14]=' '; dis_lcd_string(1,dis1); delay(20); dis_lcd_string(2,dis2); delay(20); } else { flag2=0; } } } TR0=1; while(recode<20) {} recode=0; TR0=0; TH0=0xfc;// TL0=0x18; CD4051_2_A0=1; //正向积分 CD4051_2_A1=0; delay(80); CD4051_2_A1=1; //反向积分开始 CD4051_2_A0=0; TR0=1; while(flag1); } } void int0() interrupt 0 { TR0=0; CD4051_2_A1=0; //积分电容放电 CD4051_2_A0=0; flag0=1; flag1=0; intwire=1; // pd=!pd; //用于检测外中断连续触发与否 } void time0() interrupt 1 { TR0=0; TH0=0xfc;//计数器清零 TL0=0x15; TR0=1; // pd=!pd;//用于检测定时器定时与否 recode++; if(recode>300) {} }