實驗三LED數(shù)碼管與點陣管實驗

1、電子科技大學中山學院學生實驗報告學院：機電工程專業(yè):課程名稱：單片機原理與接口技術實驗班級：姓名學號：組別：實驗名稱：實驗三LED數(shù)碼管與點陣管實驗實驗時間：成績：、實驗目的和任務1、掌握LED數(shù)碼管的動態(tài)顯示原理、接口電路及程序限制方法.2、掌握LED點陣管的工作原理、接口電路及程序限制方法二、實驗原理簡介ZSC-1實驗箱設有8位LED數(shù)碼管和一個8*8點陣管,具體電路如圖7-1所示.為有效利用單片機口線,采用動態(tài)結(jié)構(gòu),由單片機P0口直接驅(qū)動數(shù)碼管的筆段以及點陣管的列線,P2口低3位經(jīng)74HC138#碼后產(chǎn)生8路輸出低電平有效,再經(jīng)兩片74HC24阪相后,分別用作數(shù)碼管和點陣管的位/行驅(qū)動信

2、號高電平有效.74HC138Vcc|2074HC240VccP2.3P2.2P2.1P2.0_Y00_Y2_-Y42落3,2C31221OMVEeeaaagP4.4P0.7P0.6P0.5P0.4P0.3P0.2P0.1P0.015141312111096811131517CS11|19Vcc20246811131517VCC1A01Y01A11Y11A21Y21A31Y32A02Y02A12Y12A22Y22A32Y31OE2OEGND74HC2403433VCC1A01Y01A11Y11A21Y21A31Y32A02Y02A12Y12A22Y22A32Y31OE2OEGNDhID-c>

3、;>t>>h>.',.:,."8C,-;,.,：,.5C-一“一4c.3Crr-1-1,1-I-1-I-2CQ-hQR戶白.:TC12345678RRRRRRRR470Qx835363738398x8點陣管13416151com1com2com3com41110»t11口.Q口D.dpgfedcbacom1com2com3com4da-JJ-L-*110001MCl.o.u.o.dpgfedcba共陽極數(shù)碼管29866893501247135012471圖3-1LED數(shù)碼管與點陣管電路圖中P2.3、P4.4兩個限制信號的作用為：當P2,3=1

4、時,數(shù)碼管和點陣管均關閉顯示,當P2.3=0,且P4.4=1或0時,數(shù)碼管或點陣管開通顯示.P4.4P4.6為STC12C5A60S新增I/O口,將P4SW字節(jié)地址BBH存放器中D*D6位設為1后可用.使用數(shù)碼管時,可以不設P4SWP4.4引腳默認為弱上拉狀態(tài),可保證數(shù)碼管對應的74HC24C使能有效.使用點陣管時,那么必須至少將P4SW勺D4位設為1并令P4.4輸出0,以使點陣管對應的74HC24O能有效.三、實驗內(nèi)容H1、參考電路圖3.1,在proteu啾件里搭建相關的仿真模型圖3.1只是例如,例如里的模塊與proteuS真塊庫里得對應模塊外觀和接口可能會不一樣,以proteuS真塊庫里的

5、模型為主.接線方式也可以不一樣2、編寫程序,限制8位LED數(shù)碼管以1s的間隔交替顯示"12345678"和"87654321"./*詳細程序參考見指導書.頭文件聲明*/*#include<reg51.h>數(shù)據(jù)類型定義*/typedefunsignedcharuint8;typedefcharint8;typedefunsignedintuint16;/*O口線分配*/#defineSEGCODEPORTP0/*#defineBITCODEPORTP2常量數(shù)組段他表聲明*/uint8codeSegCodeTable"0xC0,0xF9

6、,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90/*;函數(shù)原型聲明*/voidLed7segLoad1();voidLed7segLoad2();voidLed7segRefresh();voidDelay(intms);/*uint8Led7SegDispBuff8;sbitcs1=P3A6;/*voidmain()(uint8i;cs1=0;全局變量聲明主函數(shù)*/*/while(1)(Led7segLoad1();/加載(更新)顯示內(nèi)容for(i=0;i<1;i+)/刷新屢次(Delay(12);Led7segRefresh();)Led7segLoa

7、d2();/for(i=0;i<1;i+)/(Delay(12);Led7segRefresh();)/*加載更新顯示內(nèi)容刷新屢次顯示內(nèi)容加載函數(shù)1mmlvoidLed7segLoad1()(Led7SegDispBuff0=1;Led7SegDispBuff1=2;Led7SegDispBuff2=3;Led7SegDispBuff3=4;Led7SegDispBuff4=5;Led7SegDispBuff5=6;Led7SegDispBuff6=7;Led7SegDispBuff7=8;/*顯示內(nèi)容加載函數(shù)*/voidLed7segLoad2()(Led7SegDispBuff0=8

8、;Led7SegDispBuff1=7;Led7SegDispBuff2=6;Led7SegDispBuff3=5;Led7SegDispBuff4=4;Led7SegDispBuff5=3;Led7SegDispBuff6=2;Led7SegDispBuff7=1;/*voidLed7segRefresh()(uint8i;for(i=0;i<8;i+)/數(shù)碼管顯示刷新函數(shù)*/共刷新8位(SEGCODEPORT=SegCodeTableLed7SegDispBuffi;/輸出第i位的段碼BIT_CODE_PORT=0xF0+i;/第i位通電顯示Delay(100);/顯示1msBIT_

9、CODE_PORT=0xF8;/所有位包括第i位熄滅/*軟件延時函數(shù)*/voidDelay(intms)uint16i;doi=790;while(-i);/延時1ms(STC12C5A60S2,11.0592MHz,C51碼優(yōu)化級另1J設為5)while(-ms);/*程序結(jié)束*/3、編寫程序,限制LED點陣管從9到0倒計時顯示減到0后熄滅.詳細程序參考見指導書./*頭文件聲明*/#include<reg51.h>sbitcs2=P3A7;/*數(shù)據(jù)類型定義*/typedefunsignedcharuint8;typedefcharint8;typedefunsignedintui

10、nt16;/*I/O口線分配*/#defineCOLPORTP0#defineROWPORTP2/*常量數(shù)組字模表聲明*/uint8codeDotTable8=/以下為0到9的8*8字模0x00,0x18,0x24,0x24,0x24,0x24,0x18,0x00,0x00,0x08,0x18,0x08,0x08,0x08,0x1C,0x00,0x00,0x18,0x24,0x04,0x08,0x10,0x3C,0x00,0x00,0x3C,0x08,0x10,0x08,0x04,0x24,0x18,0x00,0x08,0x18,0x28,0x28,0x3E,0x08,0x08,0x00,0x

11、3C,0x20,0x38,0x04,0x24,0x18,0x00,0x00,0x18,0x20,0x38,0x24,0x24,0x18,0x00,0x00,0x3C,0x04,0x08,0x10,0x10,0x10,0x00,0x00,0x18,0x24,0x24,0x18,0x24,0x24,0x18,0x00,0x18,0x24,0x24,0x1C,0x04,0x24,0x18;/*函數(shù)原型聲明*/voidLedDotRefresh();voidDelay(intms);/*全局變量聲明*/uint8LedDotDispBuff;/*主供數(shù)*voidmain()uint8i;cs2=0;/

12、選通點陣管從9減到0for(LedDotDispBuff=9;LedDotDispBuff!=0xff;LedDotDispBuff-)/for(i=0;i<1000/8;i+)/刷新125次,每次8ms,共用時1sLedDotRefresh();while(1);/空循環(huán)不再執(zhí)行刷新操作,顯示熄滅/*for(i=0;i<8;i+)/共刷新8行COL_PORT=DotTableLedDotDispBuffi;/輸出第i行的字模ROW_PORT=0xF0+i;/第i行通電顯示Delay(1);/顯示1msROW_PORT=0xF8;/所有行包括第i行熄滅點陣管顯示刷新函數(shù)*/void

13、LedDotRefresh()uint8i;/*while(-i);/軟件延時函數(shù)*/voidDelay(intms)uint16i;doi=114;延時1ms(STC12C5A60S2,11.0592MHz,C51碼優(yōu)化級另1J設為5)while(-ms);/*程序結(jié)束*/四、發(fā)揮與提升1、對參考程序1進行改良,實現(xiàn)簡易電子鐘功能./*頭文件聲明*/#include<reg51.h>數(shù)據(jù)類型定義*/*typedefunsignedcharuint8;typedefcharint8;typedefunsignedintuint16;/*I/O口線分配*/#defineSEGCODE

14、PORTP0#defineBITCODEPORTP2/*常量數(shù)組段他表聲明*/uint8codeSegCodeTable=(/*0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90);函數(shù)原型聲明*/voidvoidvoidLed7segLoad1();Led7segRefresh();Delay(intms);/*全局變量聲明*/uint8Led7SegDispBuff8;intms=0,s=0,m=0,h=0;sbitcs1=P3A6;主函數(shù)*/*voidmain()(cs1=0;while(1)(Delay(1);ms+;if(ms=100)

15、(ms=0;s+;if(s=60)(s=0;m+;if(m=60)m=0;h+;if(h=24)h=0;Led7segLoad1();Led7segRefresh();/*voidLed7segLoad1()Led7SegDispBuff0=h/10;Led7SegDispBuff1=h%10;Led7SegDispBuff2=m/10;Led7SegDispBuff3=m%10;Led7SegDispBuff4=s/10;Led7SegDispBuff5=s%10;Led7SegDispBuff6=ms/10;顯示內(nèi)容加載函數(shù)1*/數(shù)他管顯示刷新函數(shù)*/Led7SegDispBuff7=ms

16、%10;/*voidLed7segRefresh()uint8i;共刷新8位for(i=0;i<8;i+)/SEG_CODE_PORT=SegCodeTableLed7SegDispBuffi;/BIT_CODE_PORT=0xF0+i;Delay(1);BIT_CODE_PORT=0xF8;/輸出第i位的段碼第i位通電顯示顯示1ms所有位包括第i位熄/*軟件延時函數(shù)*/voidDelay(intms)uint16i;doi=140;延時1ms(STC12C5A60S2,11.0592MHz,C項碼優(yōu)化級另I設為5)while(-i);/while(-ms);2、對參考程序2進行改良,顯

17、示一個跳動的心形圖案/*程序結(jié)束*/*頭文件聲明*/#include<reg51.h>sbitcs2=P3A7;數(shù)據(jù)類型定義*/*typedefunsignedcharuint8;typedefcharint8;typedefunsignedintuint16;/*I/O#defineCOLPORTP0口線分配*/#defineROW_PORTP2/*常量數(shù)組字模表聲明*/uint8codeDotTable18=0x00,0x6c,0x92,0x82,0x44,0x28,0x30,0x20);/*函數(shù)原型聲明*/voidLedDotRefresh();voidDelay(intms

18、);/*全局變量聲明*/uint8LedDotDispBuff;/*主函數(shù)*/voidmain()uint8i;cs2=0;while(1)/選通點陣管點陣管顯示刷新函數(shù)*/for(i=0;i<1000/8;i+)/LedDotRefresh();Delay(1000);)/*刷新125次,每次8ms,共用時1svoidLedDotRefresh()/共刷新8行uint8i;for(i=0;i<8;i+)COL_PORT=DotTableLedDotDispBuffi;/輸出第i行的字模ROW_PORT=0xF0+i;Delay(1);/ROW_PORT=0xF8;/*/第i行通電顯示顯示1ms/所有行包括第i行熄