#25单片机点阵式LED“0-9”数字显示技术实验

1、25点阵式LED“09”数字显示技术1实验任务利用 8X8点阵显示数字 0到9的数字2电路原理图图4.25.13硬件系统连线(1 把“单片机系统”区域中的P1端口用8芯排芯连接到 “点阵模块 区域中的 “DR1 DR8”端口上；(2 把“单片机系统”区域中的P3端口用8芯排芯连接到 “点阵模块 区域中的 “DC1 DC8”端口上；/ 104程序设计内容(1 数字 09点阵显示代码的形成如下图所示，假设显示数字 “0”123 45 6 7 800 00 3E 41 41 41 3E 00因此，形成的列代码为 00H，00H，3EH，41H，41H，3EH，00H，00H；只要把这些代码分别送到相

2、应的 列线上面，即可实现 “0”的数字显示。送显示代码过程如下所示送第一列线代码到 P3端口，同时置第一行线为 “0”，其它行线为 “1”，延时 2ms左 右，送第二列线代码到 P3端口，同时置第二行线为 “0”，其它行线为 “1”，延时 2 ms左右，如此下去，直到送完最后一列代码，又从头开始送。数字“1”代码建立如下图所示 123 45 6 7 8其显示代码为 00H，00H，00H，00H，21H，7FH，01H，00H数字“2”代码建立如下图所示/ 10123 45 6 7 800H，00H，27H，45H，45H，45H，39H，00H数字“3”代码建立如下图所示12345 67 8

3、00H，00H，22H，49H，49H，49H，36H，00H数字“4”代码建立如下图所示12345 67 800H，00H，0CH，14H，24H，7FH，04H，00H数字“5”代码建立如下图所示123 45 6 7 8/ 1000H，00H，72H，51H，51H，51H，4EH，00H数字“6”代码建立如下图所示12345 67 800H，00H，3EH，49H，49H，49H，26H，00H数字“7”代码建立如下图所示123 45 6 7 800H，00H，40H，40H，40H，4FH，70H，00H数字“8”代码建立如下图所示123 45 6 7 8/ 1000H，00H，36H

4、，49H，49H，49H，36H，00H数字“9”代码建立如下图所示12345 67 800H，00H，32H，49H，49H，49H，3EH，00H5汇编源程序TIM EQU 30HCNTA EQU 31HCNTB EQU 32HORG 00HLJMP STARTORG 0BHLJMP T0XORG 30HSTART: MOV TIM,#00HMOV CNTA,#00HMOV CNTB,#00H/ 10MOV TMOD,#01HMOV TH0,#(65536-4000/256MOV TL0,#(65536-4000 MOD 256SETB TR0SETB ET0SETB EASJMP $T0

5、X:MOV TH0,#(65536-4000/256MOV TL0,#(65536-4000 MOD 256MOV DPTR,#TABMOV A,CNTAMOVC A,A+DPTRMOV P3,AMOV DPTR,#DIGITMOV A,CNTBMOV B,#8MUL ABADD A,CNTAMOVC A,A+DPTRMOV P1,AINC CNTAMOV A,CNTACJNE A,#8,NEXTMOV CNTA,#00HNEXT: INC TIMMOV A,TIM/ 10CJNE A,#250,NEXMOV TIM,#00HINC CNTBMOV A,CNTBCJNE A,#10,NEXMO

6、V CNTB,#00HNEX: RETITAB: DB 0FEH,0FDH,0FBH,0F7H,0EFH,0DFH,0BFH,07FHDIGIT: DB 00H,00H,3EH,41H,41H,41H,3EH,00HDB 00H,00H,00H,00H,21H,7FH,01H,00HDB 00H,00H,27H,45H,45H,45H,39H,00HDB 00H,00H,22H,49H,49H,49H,36H,00HDB 00H,00H,0CH,14H,24H,7FH,04H,00HDB 00H,00H,72H,51H,51H,51H,4EH,00HDB 00H,00H,3EH,49H,49H

7、,49H,26H,00HDB 00H,00H,40H,40H,40H,4FH,70H,00HDB 00H,00H,36H,49H,49H,49H,36H,00HDB 00H,00H,32H,49H,49H,49H,3EH,00HEND6C语言源程序#include unsigned char code tab=0 xfe,0 xfd,0 xfb,0 xf7,0 xef,0 xdf,0 xbf,0 x7funsigned char code digittab108=0 x00,0 x00,0 x3e,0 x41,0 x41,0 x41,0 x3e,0 x00,/00 x00,0 x00,0 x0

8、0,0 x00,0 x21,0 x7f,0 x01,0 x00,/1/ 10 TOC o 1-5 h z 0 x00,0 x00,0 x27,0 x45,0 x45,0 x45,0 x39,0 x00,/20 x00,0 x00,0 x22,0 x49,0 x49,0 x49,0 x36,0 x00,/30 x00,0 x00,0 x0c,0 x14,0 x24,0 x7f,0 x04,0 x00,/40 x00,0 x00,0 x72,0 x51,0 x51,0 x51,0 x4e,0 x00,/50 x00,0 x00,0 x3e,0 x49,0 x49,0 x49,0 x26,0 x00

9、,/60 x00,0 x00,0 x40,0 x40,0 x40,0 x4f,0 x70,0 x00,/70 x00,0 x00,0 x36,0 x49,0 x49,0 x49,0 x36,0 x00,/8 0 x00,0 x00,0 x32,0 x49,0 x49,0 x49,0 x3e,0 x00 /9 。unsigned int timecount 。unsigned char cnta 。unsigned char cntb 。void main(voidTMOD=0 x01。TH0=(65536-3000/256 。TL0=(65536-3000%256 。TR0=1 。ET0=1 。/ 10EA=1while(1 。void t0(void interrupt 1 using 0TH0=(65536-3000/256 。TL0=(