;显示字用查表法，不占内存，用四个16*16共阳LED点阵显示，
;效果：向上滚动显示字，每次四个，重复循环。
;R2：行扫描地址(从00-0FH)。
;R3：滚动显示时控制移动速度，也可控制静止显示的时间。
ORG 0000H
AJMP START
ORG 000BH ;T0
AJMP INTT0
ORG 0030H
;***************初始化程序 ;
START: MOV P2,#7FH ;清LED
MOV 20H,#00H ;清标志,00H为1帧扫描结束标志
CLR P1.6 ;串行寄存器打入输出端控制位
MOV TMOD,#01H ;使用T0作16位定时器,行扫描用。
MOV TH0,#0FCH ;1ms初值(12MHz)
MOV TL0,#18H
MOV SCON,#00H ;串口0方式传送显示字节
MOV IE,#82H ;T0中断允许,总中断允许
MOV SP,#70H
LCALL DIS1 ;显示准备，黑屏，1.5秒
MAIN: MOV DPTR,#TAB
LCALL MOV DISP ;逐排显示，每次四字)
MOV DPTR,#TAB
LCALL MOV DISP1 ;滚动显示，每排四字)
AJMP MAIN
; 四字逐排显示子程序 ;
;每次四字移入移出显示方式，入口时定义好DPTR值
MOV DISP: MOV R1,#6 ;显示6排字,每排四字(R1=排数)
DISLOOP: MOV R3,#100 ;每排显示时间1.6*100=1.6S
DIS MOV : MOV R2,#00H ;第0行开始
SETB TR0 ;开扫描（每次一帧）
WAIT MOV : JBC 00H,DISMOV1 ;标志为1扫描一帧结束（16毫秒为1帧，每行1毫秒）
AJMP WAIT MOV
DIS MOV 1: DJNZ R3,DISMOV ;1帧重复显示（控制显示时间）
MOV A,#128 ;显示字指针移一排（每排4字*32=128）
ADD A,DPL ;
MOV DPL,A
MOV A,#0
ADDC A,DPH
MOV DPH,A
DEC R1 ;R1为0，显示完
MOV A,R1
JZ MOV OUT ;
AJMP DISLOOP ;
MOV OUT: RET ;移动显示结束
;********************;
; 四字滚动显示子程序 ;
;每排四字向上移出显示方式，入口时定义好DPTR值
MOV DISP1: MOV R1,#255 ;向上移动显示6排字,每排四字(R1=排数*16)
DISLOOP1: MOV R3,#10 ;移动速度1.6*10=0.16S
DIS MOV 2: MOV R2,#00H ;第0行开始
SETB TR0 ;开扫描（每次一帧）
WAIT MOV 1: JBC 00H,DISMOV3 ;标志为1扫描一帧结束（16毫秒为1帧，每行1毫秒）
AJMP WAIT MOV 1
DIS MOV 3: DJNZ R3,DISMOV2 ;1帧重复显示（控制移动速度）
INC DPTR ;显示字指针移一行（二字节位置）
INC DPTR
DEC R1 ;R1为0，显示完
MOV A,R1
JZ MOV OUT1 ;
AJMP DISLOOP1 ;
MOV OUT1: RET ;移动显示结束
;*****************;
; 四个字显示子程序 ;
;静止显示表中某四个字
DIS1: MOV R3,#5AH ;静止显示时间控制（16MS*#=1.6秒）
DIS11: MOV R2,#00H ;一帧扫描初始值（行地址从00-0FH）
MOV DPTR,#TAB ;取表首址
SETB TR0 ;开扫描（每次一帧）
WAIT11: JBC 00H,DIS111 ;为1，扫描一帧结束
AJMP WAIT11
DIS111: DJNZ R3,DIS11
RET
; 扫描程序 ;
;************;
;1MS传送一行，每行显示1毫秒,一次传送四个字的某行共8个字节.
INTT0: PUSH ACC
MOV TH0,#0FCH ;1ms初值重装
MOV TL0,#18H
MOV A,#97 ;指向第四个字行右字节
ADD A,DPL
MOV DPL,A
MOV A,#0
ADDC A,DPH
MOV DPH,A
MOV A,#0
MOV C A,@A+DPTR ;查表
MOV SBUF,A ;串口0方式发送
WAIT: JBC TI,GO ;等待发送完毕
AJMP WAIT ;
GO: MOV A,DPL ;指向第四个字行左字节
SUBB A,#1
MOV DPL,A
MOV A,DPH
SUBB A,#0
MOV DPH,A
MOV A,#0
MOV C A,@A+DPTR
MOV SBUF,A
WAIT1: JBC TI,GO1
AJMP WAIT1
;
GO1: MOV R0,#03H
MLOOP: MOV A,DPL ;指向前三个字行右字节
SUBB A,#31
MOV DPL,A
MOV A,DPH
SUBB A,#0
MOV DPH,A
MOV A,#0
MOV C A,@A+DPTR ;查表
MOV SBUF,A ;串口0方式发送
WAIT2: JBC TI,GO2 ;等待发送完毕
AJMP WAIT2 ;
GO2: MOV A,DPL ;指向前三个字行左字节
SUBB A,#1
MOV DPL,A
MOV A,DPH
SUBB A,#0
MOV DPH,A
MOV A,#0
MOV C A,@A+DPTR
MOV SBUF,A
WAIT3: JBC TI,GO3
AJMP WAIT3
GO3: DJNZ R0,MLOOP ;执行三次
SETB P1.7 ;关行显示，准备涮新
NOP ;串口寄存器数据稳定
SETB P1.6 ;产生上升沿，行数据打入输出端
NOP ;
NOP ;
CLR P1.6 ;恢复低电平
MOV A,R2 ;修改显示行地址
ORL A,#0F0H ;修改显示行地址
MOV R2,A ;修改显示行地址
MOV A,P1 ;修改显示行地址
ORL A,#0FH ;修改显示行地址
ANL A,R2 ;修改显示行地址
MOV P1,A ;修改完成
CLR P1.7 ;开行显示
INC R2 ;下一行扫描地址值
INC DPTR ;
INC DPTR ;下一行数据地址
MOV A,R2
ANL A,#0FH
JNZ GO4
SETB 00H ;R2为10H，现为末行扫描，置1帧结束标志
MOV A,DPL ;指针修正为原帧初值
SUBB A,#32
MOV DPL,A
MOV A,DPH
SUBB A,#0
MOV DPH,A
CLR TR0 ;一帧扫描完，关扫描
GO4: POP ACC
RETI ;退出
;***************;
; 扫描文字表 ;
;***************;
; 共五排字,每排四个字,前后为黑屏
TAB:
DB 000H,0C0H,000H,0C0H,0FCH,0FCH,0FCH,0FCH,00DH,08CH,06DH,08CH,06BH,060H,038H,060H ;
DB 018H,060H,018H,060H,03CH,070H,064H,0D8H,0E1H,08CH,043H,006H,006H,000H,000H,000H ; "欢" 0
DB 001H,080H,067H,0FCH,067H,07CH,036H,06CH,006H,06CH,0F6H,06CH,0F6H,06CH,036H,06CH ;
DB 036H,06CH,037H,07CH,036H,06CH,030H,060H,038H,000H,06FH,0FEH,0C7H,0FEH,000H,000H ; "迎" 1
DB 001H,080H,001H,080H,031H,088H,019H,098H,019H,0B0H,009H,0A0H,0FFH,0FEH,0FFH,0FEH ;
DB 006H,0C0H,006H,0C0H,006H,0C0H,00CH,0C4H,018H,0C6H,0F0H,0FEH,060H,07CH,000H,000H ; "光" 2
DB 000H,0C0H,018H,0C0H,0D9H,0FCH,0D9H,0FCH,0DBH,000H,0DEH,060H,0D8H,030H,0DBH,0FCH ;
DB 0DBH,0FCH,0DBH,06CH,0DBH,06CH,0DBH,06CH,0DBH,0FCH,01BH,0FCH,01BH,00CH,000H,000H ; "临" 3
DB 000H,000H,0FDH,0FCH,0FDH,0FCH,058H,060H,031H,0FCH,0FDH,08CH,0FDH,0ACH,035H,0ACH ;
DB 031H,0ACH,031H,0ACH,031H,0ACH,030H,060H,030H,0D8H,071H,08CH,063H,006H,000H,000H ; "预" 4
DB 060H,000H,033H,0FCH,003H,0FCH,0FBH,00CH,0FBH,00CH,01BH,00CH,033H,0FCH,033H,0FCH ;
DB 079H,0B0H,0FDH,0B0H,035H,0B0H,031H,0B6H,033H,036H,03EH,03EH,034H,01CH,000H,000H ; "祝" 5
DB 003H,000H,003H,000H,003H,000H,003H,000H,07FH,0FCH,07FH,0FCH,003H,000H,003H,000H ;
DB 003H,000H,007H,080H,006H,0C0H,00CH,060H,018H,030H,030H,018H,060H,00CH,000H,000H ; "大" 6
DB 003H,000H,07FH,0FCH,07FH,0FCH,060H,00CH,01FH,0F0H,01FH,0F0H,006H,018H,01FH,030H ;
DB 077H,060H,00DH,0F0H,03BH,0D0H,076H,0D8H,00CH,0CCH,07BH,0C4H,063H,080H,000H,000H ; "家" 7
DB 003H,000H,01FH,0F8H,01FH,0F8H,018H,018H,01FH,0F8H,018H,018H,01FH,0FAH,018H,01EH ;
DB 07FH,0FCH,07FH,0F8H,000H,0D8H,003H,098H,00FH,018H,07CH,078H,070H,070H,000H,000H ; "身" 8
DB 018H,060H,018H,060H,030H,060H,037H,0FEH,077H,0FEH,070H,0E0H,0F1H,0F0H,0B1H,0F8H ;
DB 033H,068H,032H,064H,037H,0FEH,03DH,0FAH,030H,060H,030H,060H,030H,060H,000H,000H ; "体" 9
DB 030H,030H,03EH,0FCH,03EH,0FCH,066H,034H,067H,0FEH,0EDH,0FEH,0EEH,034H,06EH,0FCH ;
DB 062H,030H,06AH,0FCH,06EH,030H,064H,0FEH,06EH,030H,07BH,0FEH,060H,0FEH,000H,000H ; "健" 10
DB 001H,080H,07FH,0FEH,07FH,0FEH,061H,080H,06FH,0F8H,061H,098H,07FH,0FEH,061H,098H ;
DB 06FH,0F8H,069H,0C0H,06DH,0D8H,067H,0B0H,06DH,09CH,0D9H,08CH,043H,080H,000H,000H ; "康" 11
DB 000H,000H,0FFH,0FCH,0FFH,0FCH,006H,000H,006H,000H,007H,0F0H,007H,0F0H,00CH,030H ;
DB 00CH,030H,00CH,030H,018H,030H,018H,030H,030H,030H,061H,0E0H,0C0H,0C0H,000H,000H ; "万" 12
DB 001H,080H,07FH,0FEH,07FH,0FEH,001H,080H,03FH,0F8H,031H,098H,03FH,0F8H,001H,080H ;
DB 03FH,0FCH,001H,08CH,0FFH,0FEH,001H,08CH,03FH,0FCH,001H,080H,007H,000H,000H,000H ; "事" 13
DB 018H,000H,018H,000H,018H,0FCH,0FEH,0FCH,0FEH,0CCH,036H,0CCH,036H,0CCH,036H,0CCH ;
DB 066H,0CCH,036H,0CCH,01CH,0CCH,01CH,0FCH,036H,0FCH,062H,0CCH,0C0H,000H,000H,000H ; "如" 14
DB 001H,080H,07FH,0FCH,07FH,0FCH,00CH,060H,07FH,0FEH,000H,000H,01FH,0F8H,018H,018H ;
DB 01FH,0F8H,018H,018H,01FH,0F8H,001H,000H,02DH,08CH,06CH,0B6H,0C7H,0F2H,000H,000H ; "意" 15
DB 000H,000H,03FH,0F8H,03FH,0F8H,001H,080H,001H,080H,001H,080H,07FH,0FEH,07FH,0FEH ;
DB 001H,080H,003H,0C0H,006H,060H,00CH,030H,018H,018H,070H,00EH,060H,006H,000H,000H ; "天" 16
DB 000H,000H,03FH,0F8H,03FH,0F8H,001H,080H,001H,080H,001H,080H,07FH,0FEH,07FH,0FEH ;
DB 001H,080H,003H,0C0H,006H,060H,00CH,030H,018H,018H,070H,00EH,060H,006H,000H,000H ; "天" 17
DB 000H,000H,07FH,0FCH,07FH,0FCH,00CH,060H,00CH,060H,00CH,060H,0FFH,0FEH,0FFH,0FEH ;
DB 00CH,060H,00CH,060H,00CH,060H,018H,060H,018H,060H,070H,060H,020H,060H,000H,000H ; "开" 18
DB 000H,000H,003H,000H,001H,080H,000H,080H,000H,000H,006H,010H,036H,018H,036H,00CH ;
DB 066H,006H,066H,006H,046H,010H,006H,018H,007H,0F8H,003H,0F0H,000H,000H,000H,000H ; "心" 19
END
