51單片機(jī)與ADC0809應(yīng)用做AD轉(zhuǎn)換(電路圖附程序)

1、ADC0809與51單片機(jī)應(yīng)用程序uchar AD_DATA2;II保存INO和IN1經(jīng)AD轉(zhuǎn)換后的數(shù)據(jù)uchar AD_DATA2;II保存INO和IN1經(jīng)AD轉(zhuǎn)換后的數(shù)據(jù)電路原理圖如下:12345ST6EOC"7DJ SOE9CLKio1:1121JDI14XIVCCINSIN2INITNIIN5NOEM6AIN7BSTCEOC ALEDJD7OED6CT JiD5VCCD4VrefbDOGNDVref-DID2II 0592MHzADCO8O?51片機(jī)嬪口電路矗應(yīng)冃趕用VCCC.T1lOUf27 ADIN2ST FOCADIN! OE焉-ADDCS LKI"ADDGW

2、2008-5-18S10KBy niica,vcc22TTTr DtSTT'd?IS D417 DO1615 U2:ClJOpFRST1011IS19P1.0.-TPl.J/T TM iP1JPl.4Pl.5Pl .6Pl. 7RSTATDP3.O/RXD pj./TO2 PJ.2.-WTU P33.-WTI PJ.4/T0 PI-ST】 P3.6/WR PJ-VMXTAL2XTAL1GidVccPOO PO.lPO.2PO.3F0.4P0.5P0.6P0.7EA/VPPjLE-PROGPSENP2.7P2.6PZ.5 Pi .4P2JP2.2P2.1P2.039.17.沁J5J433

3、32JI2" D624 D323D2220121 DOuchar AD_DATA2;II保存INO和IN1經(jīng)AD轉(zhuǎn)換后的數(shù)據(jù)uchar AD_DATA2;II保存INO和IN1經(jīng)AD轉(zhuǎn)換后的數(shù)據(jù)說明： DOD7接51單片機(jī)的 P2 口（P2.0P2.7）ADIN1和ADIN2為通道IN0和IN1的電壓模擬量輸入（05V）應(yīng)用程序如下：#i nclude"reg52.h"#defi ne uchar un sig ned char sbit ST=P1A0;sbit EOC=P1A1；sbit OE=P1A2;sbit CLK=P1A3;sbit ADDCS=P1A

4、4;uchar AD_DATA2;II保存INO和IN1經(jīng)AD轉(zhuǎn)換后的數(shù)據(jù)* 延時(shí)函數(shù) *void delay(uchar i) uchar j; while(i-) for(j=125;j>0;j-)/* 系統(tǒng)初始化*void init() EA = 1; / 開總中斷TMOD = 0x02; / 設(shè)定定時(shí)器 T0 工作方式TH0=216; / 利用 T0 中斷產(chǎn)生 CLK 信號(hào) TL0=216;TR0=1; / 啟動(dòng)定時(shí)器 T0ET0=1;ST=0;OE=0;*T0中斷服務(wù)程序 */void t0(void) interrupt 1 using 0 CLK=CLK;*AD 轉(zhuǎn)換函數(shù)*void AD()ST=0;ADDCS=0; / 選擇通道 IN0 delay(10);ST=1; / 啟動(dòng) AD 轉(zhuǎn)換delay(10);ST=0; while(0=EOC);OE=1;AD_DATA0=P2;OE=0;ST=0;ADDCS=1; / 選擇通道 IN1 delay(10);ST=1; /啟動(dòng) AD 轉(zhuǎn)換 delay(10);ST=0;whi