實驗一 AD轉(zhuǎn)換與數(shù)據(jù)采集

實驗一A/D轉(zhuǎn)換與數(shù)據(jù)采集實驗?zāi)康?1)掌握A/D轉(zhuǎn)換與單片機的接口方法；掌握A/D芯片TLC1292的編程方法；掌握數(shù)據(jù)采集程序的設(shè)計方法；實驗內(nèi)容利用實驗開發(fā)裝置上的TLC1292做A/D轉(zhuǎn)換器，對電位器提供的模擬電壓信號進行定時采樣，結(jié)果在LCD1602上進行顯示。I/O地址·A/D轉(zhuǎn)換芯片TLC1292DATP1.7數(shù)據(jù)位CLKP1.6時鐘位CSP1.5選片位實驗線路將TLC1292的信號線接單片機的相應(yīng)的I/O口，將模擬電壓輸入端連到電位器的電壓輸出端，并接萬用表進行輸入電壓測量。實驗步驟在PC機輸入源程序并匯編，然后下載到單片機上，進行調(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V00.511.522.533.544.55A/D結(jié)果顯示電壓V實驗報告(1)整理好實驗程序和實驗記錄,進行數(shù)據(jù)處理分析并做圖。(2)數(shù)據(jù)采集中，如何實現(xiàn)精確的定時數(shù)據(jù)采集？(3)LCD1602顯示程序設(shè)計中，顯示刷新的時間如何確定？實驗參考程序#include<reg52.h>#defineucharunsignedchar#defineuintunsignedint#defineulongunsignedlongsbitDAT=P1^7;sbitCLK=P1^6;sbitCS=P1^5;uintLTC1292(void){ uinti,x; CLK=0;DAT=1;CS=0; for(i=0;i<14;i++) { CLK=1; x<<=1; if(DAT==1)x++; CLK=0; } CS=1; return(x&0xfff);}voiddelay(uintt){while(t--);}#defineucharunsignedchar#defineuintunsignedint#defineLCD_COM 0//Command#defineLCD_DAT1//DatasbitLcdRS=P2^7;sbitLcdRW=P2^6;sbitLcdEN=P2^5;voidtime(unsignedintt){unsignedinti;for(i=0;i<t;i++);}voidLCD_WRITE(unsignedcharx,bitWS){P3=x;LcdRW=0;LcdRS=WS;LcdEN=1;time(50);LcdEN=0;}voidLCD_Initial(){LCD_WRITE(0x38,LCD_COM);time(120);LCD_WRITE(0x38,LCD_COM);time(120);LCD_WRITE(0x01,LCD_COM);time(120);LCD_WRITE(0x06,LCD_COM);time(120);LCD_WRITE(0x0c,LCD_COM);time(120);}voidGotoXY(unsignedcharx,unsignedchary){unsignedcharcodetable[4]={0x00,0x40,0x10,0x50};LCD_WRITE(0x80+table[x]+y,LCD_COM);}voidPutCh(charm){LCD_WRITE(m,LCD_DAT);}voidPrint(unsignedchar*str){ while(*str!='\0') { PutCh(*str); str++; }}voidmain(){uintm;ulongy;LCD_Initial();GotoXY(0,0);Print("LTC1292Test....");GotoXY(1,0);Print("AD=");GotoXY(1,8);Print("V=v");while(1){delay(2000);y=LTC1292();GotoXY(1,3);PutCh(y/1000+'0');PutCh((y/100)%10+'0');PutCh((y/10)%10+'0');PutCh(y%10+'0'); y=y*500; m=y/4095;GotoXY(1,10);PutCh((m/100)%10+'0');Put