adc0832數(shù)字電壓表(程序+仿真圖).doc

仿真圖：/*包含頭文件*/#include #include /*端口定義*/sbit CS = P35;sbit Clk = P33;sbit DATI = P34;sbit DATO = P34;sbit P20=P20 ;/*定義全局變量*/unsigned char dat = 0x00; /AD值unsigned char count = 0x00; /定時(shí)器計(jì)數(shù)unsigned char CH; /通道變量unsigned char dis = 0x00, 0x00, 0x00; /顯示數(shù)值/*共陽(yáng)LED段碼表*/unsigned char code tab=0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90;char code tablewe= 0xfd,0xfb,0xf7,0xef,0xdf,0xfe ;/*函數(shù)功能:AD轉(zhuǎn)換子程序入口參數(shù):CH出口參數(shù):dat*/unsigned char adc0832(unsigned char CH) unsigned char i,test,adval; adval = 0x00; test = 0x00; Clk = 0; /初始化 DATI = 1; _nop_(); CS = 0; _nop_(); Clk = 1; _nop_(); if ( CH = 0x00 ) /通道選擇 Clk = 0; DATI = 1; /通道0的第一位 _nop_(); Clk = 1; _nop_(); Clk = 0; DATI = 0; /通道0的第二位 _nop_(); Clk = 1; _nop_(); else Clk = 0; DATI = 1; /通道1的第一位 _nop_(); Clk = 1; _nop_(); Clk = 0; DATI = 1; /通道1的第二位 _nop_(); Clk = 1; _nop_(); Clk = 0; DATI = 1; for( i = 0;i 8;i+ ) /讀取前8位的值 _nop_(); adval = 1; Clk = 1; _nop_(); Clk = 0; if (DATO) adval |= 0x01; else adval |= 0x00; for (i = 0; i = 1; if (DATO) test |= 0x80; else test |= 0x00; _nop_(); Clk = 1; _nop_(); Clk = 0; if (adval = test) /比較前8位與后8位的值，如果不相同舍去。若一直出現(xiàn)顯示為零，請(qǐng)將該行去掉 dat = test; _nop_(); CS = 1; /釋放ADC0832 DATO = 1; Clk = 1; return dat;/*函數(shù)功能:延時(shí)子程序入口參數(shù):出口參數(shù):*/void delay(void) int k; for(k=10;k500;k+);/*函數(shù)功能:將0-255級(jí)換算成0.00-5.00的電壓數(shù)值入口參數(shù):i出口參數(shù):*/void convdata(unsigned char i) dis0 = i/51; /個(gè)位 dis1 = (i%51)*10/51*2; /小數(shù)點(diǎn)后第一位 dis2 = (i%51)*10%51)*10/51*2; /小數(shù)點(diǎn)后第二位/*函數(shù)功能:數(shù)碼管顯示子程序入口參數(shù):出口參數(shù):*/void display(void) P2=0xff; P0=tabdis0 & 0x7f; /顯示個(gè)位和小數(shù)點(diǎn)delay(); P2=0xfd; P2=0xff; P0=tabdis1; /顯示小數(shù)點(diǎn)后第一位delay(); P2=0xfb; P2=0xff; P0=tabdis2; /顯示小數(shù)點(diǎn)后第二位delay(); P2=0xf7; P2=0xff; P0=0xff; /顯示小數(shù)點(diǎn)后第二位delay(); P2=0xfe; /*函數(shù)功能:主程序入口參數(shù):出口參數(shù):*/void main(void) P2=0xff; /端口初始化 P0=0xff; delay(); CH = 0x00; /在這里選擇通道 0x00或0x01 TMOD = 0x01; /設(shè)置中斷 TH0=(65536-50000)/256;/定時(shí)器1初值定時(shí)50msTL0=(65536-50000)%256; IE = 0x82; TR0 = 1; while(1) /主循環(huán) dat = adc0832(CH); convdata(dat); /數(shù)據(jù)轉(zhuǎn)換 display(); /顯示數(shù)值 /*函數(shù)功能:定時(shí)器中斷延時(shí)程序 這一段的作用時(shí)隔一段時(shí)間抽樣一次 否側(cè)顯示的最后一位會(huì)不穩(wěn)定入口參數(shù):出口參數(shù):*/void timer0(void) interrupt 1 TMOD = 0x01; TH0=(65536-50000)/256;/定時(shí)器1初值