AD轉(zhuǎn)換與數(shù)據(jù)采集

1、實(shí)驗(yàn)一A/D轉(zhuǎn)換與數(shù)據(jù)采集/*材*材*材*材*10008101341、實(shí)驗(yàn)?zāi)康恼莆誂/D轉(zhuǎn)換與單片機(jī)的接II方法;掌握A/D芯片TLC549的編程方法：掌握數(shù)據(jù)采集程序的設(shè)計(jì)方法；2、實(shí)驗(yàn)內(nèi)容利用實(shí)驗(yàn)開(kāi)發(fā)裝置上的TLC549做A/D轉(zhuǎn)換器，対電位器提供的模擬電壓信號(hào)進(jìn)行定時(shí)采樣，結(jié)果在數(shù)碼管上進(jìn)行顯示。3、I/O地址A/D轉(zhuǎn)換芯片TLC549CLKP1.5時(shí)鐘位DATPl.7數(shù)據(jù)位CSPl.6選片位4、實(shí)驗(yàn)線路將TLC549的CLK接P1.5、DAT接P1.7、CS接P1.6,將模擬電壓輸入端連到電位器的電壓輸出端，并接萬(wàn)用表進(jìn)行輸入電壓測(cè)量。RV1AJN$00REFrCSREF-SCLU2T

2、LC543打曰e58577&1k訂EXTAL1U1101819171615K131228172211321339實(shí)驗(yàn)步驟在pc機(jī)輸入源程序并匯編，然后卜載到單片機(jī)上，進(jìn)行調(diào)試。調(diào)節(jié)電位器，電壓從0V到5V變化，記錄數(shù)碼管的顯示數(shù)值。記錄到表中。輸入電壓V00.511.522.533.541.55A/D結(jié)果顯示電壓V6、實(shí)驗(yàn)報(bào)告整理好實(shí)驗(yàn)程序和實(shí)驗(yàn)記錄，進(jìn)行數(shù)據(jù)處理分析并做圖。數(shù)據(jù)采集中，如何實(shí)現(xiàn)精確的定時(shí)數(shù)據(jù)采集？數(shù)碼管動(dòng)態(tài)打描顯示程序設(shè)計(jì)中，顯示刷新的時(shí)間如何確定?7、附加要求實(shí)用LTC1292.MCP3208、ADC0808等A/D轉(zhuǎn)換器實(shí)現(xiàn)此實(shí)驗(yàn)，或?qū)嶒?yàn)LCD1602進(jìn)行上述實(shí)驗(yàn)的結(jié)果顯

3、示。/*TLC549ADC轉(zhuǎn)換程序*/sbitCLK二P5;sbitDAT二Pl飛；sbitCS二P7;ucharTLC549ADC(void)uchari,x;CLK=O;DAT二1;CS二0;for(i=0;i8;i+)CLK二1;NOP;x=l;if(DAT=l)x+;CLK二0;NOP;CS=1;return(x);/*/ADC0809數(shù)據(jù)采集AD0809數(shù)據(jù)采集實(shí)驗(yàn)程序:#includesbitOE=P2A0;sbitEOC=P2A1;sbitSTART=P2A2;=P2A3;=P2人7;=P2A6;=P2A5;=P2A4;sbitCLKsbitALEsbitCSAsbitCSBsb

4、itCSCbitsclk;嚴(yán)利用定時(shí)器0中斷為AD0809轉(zhuǎn)換(START)產(chǎn)生脈沖信號(hào)引voidtimeiO()mternipt1sclk=sclk;CLK=sclk;voidmainOunsignedmtx;EA=1;開(kāi)總中斷ETO=1;開(kāi)定時(shí)器0中斷TMOD=Ox22;/定時(shí)器T1,TO都設(shè)置為工作方式2(8位初值自動(dòng)重裝的8位定時(shí)/技術(shù)器)TH0=55;TL0=55;TRO=1;/啟動(dòng)定時(shí)器0,/*AD0809初始化*/ALE=O;START=O;OE=0;CSA=1;CSB=1;CSC=1;EOC=1;while(l)ALE=1;/地址鎖存允許，ALE=1;A、B、C地址被鎖存ALE

5、=O;START;正脈沖有效，上升沿逐次逼近寄存器清零，下降沿開(kāi)始AD轉(zhuǎn)換START=O;while(!EOC);EOC二0時(shí)，AD正在轉(zhuǎn)換OE=1;輸出允許，OE=1,轉(zhuǎn)換結(jié)果可通過(guò)數(shù)據(jù)總線被讀走x=PO;讀取P0口數(shù)據(jù)OE=0;x=(x*50)/255;讀數(shù)擴(kuò)大10倍Pl=x%10+(x/10%10)*16;一、工作方式寄存器TMOD工作方式寄存器TMOD用于設(shè)置定時(shí)/計(jì)數(shù)器的工作方式，低四位用于T0,高四位用于T1。其格式如下6門(mén)5口4。2門(mén)2Oq字節(jié)地址；89皿GATEC/TMlMOGATEC/TMlMOTMOD定時(shí)/計(jì)數(shù)器工作方或設(shè)魚(yú)表亠iM1M0工作方式Q說(shuō)明Q00a方式213位定

6、時(shí)/計(jì)數(shù)器存Ola方式H16位定時(shí)/計(jì)數(shù)器口10-P方式298位自動(dòng)重逵定時(shí)/計(jì)數(shù)器。114方式32TO分成兩個(gè)獨(dú)乂跑8位定時(shí)/計(jì)數(shù)器；11此方式停止計(jì)數(shù)卩TLC549數(shù)據(jù)采集與數(shù)碼管SEG顯示實(shí)驗(yàn)程序：#include#defineucharunsignedchar#defineumtunsignedmtsbitDAT=P1A7;sbitCS=P1人6;sbitCLK=P1A5;sbitSO=P2A7;sbitSI=P2A6;sbitS2=P2人5;sbitS3=P2A4;ucharTLC549ADC(void)uchari,x;CLK=0;DAT=1;CS=0;foi(i=0;i8;i+)

7、CLK=1;/elk為高電平時(shí)，讀取數(shù)據(jù)X=l;/串行讀取數(shù)據(jù)if(DAT=l)x+;CLK=0;CS=1;letuni(x);voiddelay(umtt)wlule(t);charcodetab=0 x3E0 x06,0 x5B.0 x4E0 x66,0 x6D,0 x7D,0 x07,0 x7E0 x6E0 x77,0 x7C,0 x39、0 x5E,0 x79、0 x71;voidmainQucharx,m;umty;wlule(l)x=TLC549ADC();y=x*50;m=y/255;P3=tabx/16;S0=l;delay(400);S0=0;選通第一位數(shù)碼管顯示P3=tab

8、x%16;Sl=l;delay(400);Sl=0;/選通第二位數(shù)碼管顯示P3=tabm/10+0 x80;S2=l;delay(400);S2=0;P3=tabm%10;S3=l;delay(400);S3=0;調(diào)節(jié)電位器，電壓從OV到5V變化，記錄數(shù)碼管的顯示數(shù)值。記錄到表中。輸入電壓V00.511.522.533.541.55A/D結(jié)果001A334D668099B3CDE6FF顯示電壓V000.51.01.52.02.55.03.54.04.55.0V=N*5/255TLC549數(shù)據(jù)采集與LCD顯示AT89C61實(shí)驗(yàn)程序：#include#defineucharunsignedchar

9、#defineumtunsignedmtsbitDAT=P1A7;sbitCS=P1人6;sbitCLK=P1A5;ucharTLC549ADC(void)uchari,x;CLK=O;DAT=1;CS=O;foi(i=0;i8;i+)CLK=1;x=l;if(DAT=l)x+;CLK=O;CS=1;letiun(x);徐戰(zhàn)輝*/嚴(yán)*1000810134#defineucharunsignedchai#defineunitunsignedmt#defineLCD_COM0/Command#defineLCD_DAT1/Datauchaicodetable-TLC549Test.*;ucharc

10、odetable1=HAD=V=vn;ucharnum;sbitLcdRS=P2人7;sbitLcdRW=P2A6;sbitLcdEN=P2人5;voidtime(unsignedintt)unsignedmti;fbr(i=O;it;i+);voidLCD_WRITE(unsignedcharx,bitWS)P3=x;將耍寫(xiě)的命令字如送到P3數(shù)據(jù)總線上LcdRW=0;LcdRS=WS;/WS=O,寫(xiě)命令模式；vs=l,寫(xiě)數(shù)據(jù)模式LcdEN=l;time(50);LcdEN=0;voidLCD_InitiaiQucharnum;LCD_WRIT玖Ox38,LCD_COM);time(120);

11、/顯示模式設(shè)置LCD_WRIT玖0 x01,LCD_COM);time(120);/顯示清零，數(shù)據(jù)指針清零LCD_WRIT玖0 x06,LCD_COM);time(120);/寫(xiě)一個(gè)字符后，地址指針H動(dòng)加LCD_WRITE(OxOc,LCD_COM);time(120);/設(shè)置開(kāi)顯示，不顯示光標(biāo)LCD_VRITE(0 x80,LCD_COM);fbi(num=0;num15;num-H-)LCD_WRITE(tablemim丄CD_DAT);tune(lO);LCD_WRITE(0 x80十0 x40,LCD_COM);fbi(num=0;numP1.7P37WP1.6P3WRP1.5P3.s

12、rnP1.4P3.4CT0PI.3P3.3fiHTTP1.2P3.2flKT0P1.1P31/TXDP1.0P3.aXDP27/A15P26W4EAP2.5TA134LEP24/A12PSENP2.JW1P2.2TA10P2.1JA3P2.0丿A8RSTPO7JAD7PO6JAD6P0.5AAD5PO4JAD4XTAL2P0.33D3P023D2P01JAD1XFAL1POODDO171514311in2g2L26實(shí)驗(yàn)程序：存include#defineucharunsignedchar#defineumtunsignedmtsbitDAT=P1A7;sbitCS=P1人6;sbitCLK=P

13、1A5;voidtime(unsignedintt);/*LTC1292ADC采樣程序*/unitLTC1292ADC(void)uchai1；unitx;CLK=0;DAT=1;CS=0;foi(i=0;K12;i+)CLK=1;x=l;if(DAT=l)x+;CLK=1;CS=1;letum(x);*voiddelay(umtt)wlule(t);徐戰(zhàn)輝*/嚴(yán)*1000810134#defineucharunsignedchai#defineunitunsignedmt#defineLCD_COM0/Command#defineLCD_DAT1/Dataucharcodetable-rLT

14、C1292Test；ucharcodetable1=HAD=V=.vn;ucharnum;sbitLcdRS=P2A7;sbitLcdRW=P2A6;sbitLcdEN=P2A5;voidtime(unsignedintt)unsignedinti;for(i=0;it;i+);voidLCD_WRITE(unsignedcharx,bitWS)P3=x;將耍寫(xiě)的命令字如送到P3數(shù)據(jù)總線上LcdRW=0;LcdRS=WS;/WS=0,寫(xiě)命令模式；ws=l,寫(xiě)數(shù)據(jù)模式LcdEN=l;time(50);LcdEN=0;voidLCD_Initial()ucharnum;LCD_WRIT玖Ox38,

15、LCD_COM);time(120);LCD_WRITE(0 x01,LCD_COM);time(120);LCD_WRIT玖0 x06,LCD_COM);time(120);LCD_WRIT玖OxOc,LCD_COM);time(120);LCD_WRITE(0 x80,LCD_COM);foi(num=0;num15;num-H-)LCD_WRITE(tablem】m,LCD_DAT);tune(lO);LCD_WRITE(0 x80十0 x40,LCD_COM);fbi(num=O;numlLCD_WRITE(8blelniim、LCD_DAT);tune(lO);voidwiite_LTC1292ADC(uchaiadd,unitx)ucharge,shi,bai,qianjn,zh，po;unity;qian=x/1000;bai=(x%1000)/100;slu=(x%100)/10;ge=x%10;v=x*50;J夕m=y/4095;zli=ni/10;po=m%10;LCD_WRITE(0 x80十0 x40十a(chǎn)dd,LCD_COM);LCD_WRITE(0 x30十qian,LCD_DAT);LCD_WRITE(0 x30+bai,LCD_DAT);LCD_WRITE(0 x30+shi