实验指导书拉幕式数码显示技术

拉幕式数码显示技－S8通过74LS138译的Y0－Y7来控制选通每个数码管的位选端。AT89S51单片机的P1.0－P1.2控制74LS138A，B，C端子。在8位数码管上从右向左循环显示“（1P0.0/AD0－P0.7/AD78a－hS1－S8端口上；（3P1.0－P1.23根导线连接到“三八译码模块”A、B、C“端口上；（1个数码管显示的时间大1ms到4ms之间，所以为了保证正确显示，我必1ms，就得刷新一个数码管。而这刷新时间我们采用单片机的定时/计T01ms对数码管刷新一次，T02。（28 T0T0初始化，TH0，TL0位选数据＝位选数据＝80.4CNTCNT＝9CNT位选数据T0 EQU EQU EQU EQU EQU3BH EQUORG00HORG0BHLJMP MOVA,#10MOV MOV@R1,AINCR1 MOVDISPBIT,#00H MOVCNT,#00HMOVTMOD,#01HMOVTH0,#(65536-1000)/256MOVTL0,#(65536-1000)MOD256SETBTR0SETBET0SETBEASJMP$

MOVTH0,#(65536-1000)/256MOVTL0,#(65536-1000)MOD256MOVA,DISPBITMOVR0,AMOVCA,@A+DPTRMOVP0,AMOVA,P1MOVP1,AINCDISPBITCJNEA,#08H,NEXTMOV CJNEA,#50,LL1 CJNEA,#8,LL1 INCCNT CJNEA,#9,LLX CJNEA,#01H,NEX1MOV30H,#8 LJMP CJNEA,#02H,NEX2MOV31H,#8MOV30H,#8LJMP CJNEA,#03H,NEX3MOV32H,#8MOV31H,#8MOV30H,#8LJMP CJNEA,#04H,NEX4MOV33H,#8MOV32H,#8MOV31H,#8MOV30H,#8LJMP CJNEA,#05H,NEX5MOV34H,#8MOV33H,#8MOV32H,#8MOV31H,#8MOV30H,#8LJMP CJNEA,#06H,NEX6MOV35H,#8MOV34H,#8MOV33H,#8MOV32H,#8MOV31H,#8MOV30H,#8LJMP CJNEA,#07H,NEX7MOV36H,#8MOV35H,#8MOVMOV33H,#8MOV32H,#8MOV31H,#8MOV30H,#8LJMP CJNEA,#08H,NEX8MOV37H,#8MOV36H,#8MOV35H,#8MOV34H,#8MOV33H,#8MOV32H,#8MOV31H,#8MOV30H,#8LJMP CJNEA,#00H,DONEMOV37H,#10MOV36H,#10MOV35H,#10MOV34H,#10MOV33H,#10MOV32H,#10MOV31H,#10MOV LJMP DB3FH,06H,5BH,4FH,66H,6DH,7DH,07H,7FH,6FH,00HC#includeunsignedcharcodeunsignedcharunsignedchardispbuf[8]={16,16,16,16,16,16,16,16};unsignedchar unsigned unsignedchar unsigned