实验三LED数码管与点阵管实验

1、电子科技大学中山学院学生实验报告学院：机电工程专业:课程名称：单片机原理与接口技术实验班级：姓名学号：组别：实验名称：实验三LED数码管与点阵管实验实验时间：成绩：、实验目的和任务1、掌握LED数码管的动态显示原理、接口电路及程序限制方法.2、掌握LED点阵管的工作原理、接口电路及程序限制方法二、实验原理简介ZSC-1实验箱设有8位LED数码管和一个8*8点阵管,具体电路如图7-1所示.为有效利用单片机口线,采用动态结构,由单片机P0口直接驱动数码管的笔段以及点阵管的列线,P2口低3位经74HC138#码后产生8路输出低电平有效,再经两片74HC24阪相后,分别用作数码管和点阵管的位/行驱动信

2、号高电平有效.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户白.:TC12345678RRRRRRRR470Qx835363738398x8点阵管13416151com1com2com3com41110»t11口.Q口D.dpgfedcbacom1com2com3com4da-JJ-L-*110001MCl.o.u.o.dpgfedcba共阳极数码管29866893501247135012471图3-1LED数码管与点阵管电路图中P2.3、P4.4两个限制信号的作用为：当P2,3=1

4、时,数码管和点阵管均关闭显示,当P2.3=0,且P4.4=1或0时,数码管或点阵管开通显示.P4.4P4.6为STC12C5A60S新增I/O口,将P4SW字节地址BBH存放器中D*D6位设为1后可用.使用数码管时,可以不设P4SWP4.4引脚默认为弱上拉状态,可保证数码管对应的74HC24C使能有效.使用点阵管时,那么必须至少将P4SW勺D4位设为1并令P4.4输出0,以使点阵管对应的74HC24O能有效.三、实验内容H1、参考电路图3.1,在proteu啾件里搭建相关的仿真模型图3.1只是例如,例如里的模块与proteuS真块库里得对应模块外观和接口可能会不一样,以proteuS真块库里的

5、模型为主.接线方式也可以不一样2、编写程序,限制8位LED数码管以1s的间隔交替显示"12345678"和"87654321"./*详细程序参考见指导书.头文件声明*/*#include<reg51.h>数据类型定义*/typedefunsignedcharuint8;typedefcharint8;typedefunsignedintuint16;/*O口线分配*/#defineSEGCODEPORTP0/*#defineBITCODEPORTP2常量数组段他表声明*/uint8codeSegCodeTable"0xC0,0xF9

6、,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90/*;函数原型声明*/voidLed7segLoad1();voidLed7segLoad2();voidLed7segRefresh();voidDelay(intms);/*uint8Led7SegDispBuff8;sbitcs1=P3A6;/*voidmain()(uint8i;cs1=0;全局变量声明主函数*/*/while(1)(Led7segLoad1();/加载(更新)显示内容for(i=0;i<1;i+)/刷新屡次(Delay(12);Led7segRefresh();)Led7segLoa

7、d2();/for(i=0;i<1;i+)/(Delay(12);Led7segRefresh();)/*加载更新显示内容刷新屡次显示内容加载函数1mmlvoidLed7segLoad1()(Led7SegDispBuff0=1;Led7SegDispBuff1=2;Led7SegDispBuff2=3;Led7SegDispBuff3=4;Led7SegDispBuff4=5;Led7SegDispBuff5=6;Led7SegDispBuff6=7;Led7SegDispBuff7=8;/*显示内容加载函数*/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+)/数码管显示刷新函数*/共刷新8位(SEGCODEPORT=SegCodeTableLed7SegDispBuffi;/输出第i位的段码BIT_CODE_PORT=0xF0+i;/第i位通电显示Delay(100);/显示1msBIT_

9、CODE_PORT=0xF8;/所有位包括第i位熄灭/*软件延时函数*/voidDelay(intms)uint16i;doi=790;while(-i);/延时1ms(STC12C5A60S2,11.0592MHz,C51码优化级另1J设为5)while(-ms);/*程序结束*/3、编写程序,限制LED点阵管从9到0倒计时显示减到0后熄灭.详细程序参考见指导书./*头文件声明*/#include<reg51.h>sbitcs2=P3A7;/*数据类型定义*/typedefunsignedcharuint8;typedefcharint8;typedefunsignedintui

10、nt16;/*I/O口线分配*/#defineCOLPORTP0#defineROWPORTP2/*常量数组字模表声明*/uint8codeDotTable8=/以下为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;/*函数原型声明*/voidLedDotRefresh();voidDelay(intms);/*全局变量声明*/uint8LedDotDispBuff;/*主供数*voidmain()uint8i;cs2=0;/

12、选通点阵管从9减到0for(LedDotDispBuff=9;LedDotDispBuff!=0xff;LedDotDispBuff-)/for(i=0;i<1000/8;i+)/刷新125次,每次8ms,共用时1sLedDotRefresh();while(1);/空循环不再执行刷新操作,显示熄灭/*for(i=0;i<8;i+)/共刷新8行COL_PORT=DotTableLedDotDispBuffi;/输出第i行的字模ROW_PORT=0xF0+i;/第i行通电显示Delay(1);/显示1msROW_PORT=0xF8;/所有行包括第i行熄灭点阵管显示刷新函数*/void

13、LedDotRefresh()uint8i;/*while(-i);/软件延时函数*/voidDelay(intms)uint16i;doi=114;延时1ms(STC12C5A60S2,11.0592MHz,C51码优化级另1J设为5)while(-ms);/*程序结束*/四、发挥与提升1、对参考程序1进行改良,实现简易电子钟功能./*头文件声明*/#include<reg51.h>数据类型定义*/*typedefunsignedcharuint8;typedefcharint8;typedefunsignedintuint16;/*I/O口线分配*/#defineSEGCODE

14、PORTP0#defineBITCODEPORTP2/*常量数组段他表声明*/uint8codeSegCodeTable=(/*0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90);函数原型声明*/voidvoidvoidLed7segLoad1();Led7segRefresh();Delay(intms);/*全局变量声明*/uint8Led7SegDispBuff8;intms=0,s=0,m=0,h=0;sbitcs1=P3A6;主函数*/*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;显示内容加载函数1*/数他管显示刷新函数*/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;/输出第i位的段码第i位通电显示显示1ms所有位包括第i位熄/*软件延时函数*/voidDelay(intms)uint16i;doi=140;延时1ms(STC12C5A60S2,11.0592MHz,C项码优化级另I设为5)while(-i);/while(-ms);2、对参考程序2进行改良,显

17、示一个跳动的心形图案/*程序结束*/*头文件声明*/#include<reg51.h>sbitcs2=P3A7;数据类型定义*/*typedefunsignedcharuint8;typedefcharint8;typedefunsignedintuint16;/*I/O#defineCOLPORTP0口线分配*/#defineROW_PORTP2/*常量数组字模表声明*/uint8codeDotTable18=0x00,0x6c,0x92,0x82,0x44,0x28,0x30,0x20);/*函数原型声明*/voidLedDotRefresh();voidDelay(intms

18、);/*全局变量声明*/uint8LedDotDispBuff;/*主函数*/voidmain()uint8i;cs2=0;while(1)/选通点阵管点阵管显示刷新函数*/for(i=0;i<1000/8;i+)/LedDotRefresh();Delay(1000);)/*刷新125次,每次8ms,共用时1svoidLedDotRefresh()/共刷新8行uint8i;for(i=0;i<8;i+)COL_PORT=DotTableLedDotDispBuffi;/输出第i行的字模ROW_PORT=0xF0+i;Delay(1);/ROW_PORT=0xF8;/*/第i行通电显示显示1ms/所有行包括第i行熄