led.asm

单片机程序集合

;LED16x16的片选信号接主板CS3,其它数据信号,地址信号,写信号接主板的相应信号.
RowLow   equ  0B002h;   行低八位地址
RowHigh  equ  0B003h;   行高八位地址
ColLow   equ  0B000h;   列低八位地址
ColHigh  equ  0B001h;   列高八位地址
bitmask  equ  40h
base     equ  42h

         org  0
         jmp  main
main:
         mov  bitmask,  #0
         mov  bitmask+1,#0

         ;清屏
         mov  a,#00h           ;列驱动低有效
         mov  dptr,#RowLow
         movx @dptr,a
         mov  dptr,#RowHigh
         movx @dptr,a
         mov  a,#0ffh          ;行驱动高有效
         mov  dptr,#ColLow
         movx @dptr,a
         mov  dptr,#ColHigh
         movx @dptr,a

         mov  r5, #0           ;汉字个数
loop0:
         mov  r4, #500h          ;每个字显示的时间
loop:
         mov  bitmask, #01     ;选择显示行
         mov  r2, #16          ;每行16列

         mov  a,r5             ;字模的起始地址
         mov  b,#32
         mul  ab
         mov  dptr,#Font
         add  a,dpl
         mov  base, a
         mov  a,b
         addc a,dph
         mov  base+1,a
nextrow:
         mov  a,#00h           ;先关闭显示
         mov  dptr,#RowLow
         movx @dptr,a
         mov  dptr,#RowHigh
         movx @dptr,a

         mov  dpl, base        ;取出该行字模
         mov  dph, base+1
	 clr  a
         movc a, @a+dptr
         mov  r0,a
         inc  dptr
	 clr  a
         movc a,@a+dptr
         mov  r1,a
         inc  dptr
         mov  base  , dpl     ;指向下行字模
         mov  base+1, dph

         mov  dptr,#ColLow    ;输出字模数据
         mov  a,r0
         cpl  a
         movx @dptr,a
         mov  dptr,#ColHigh
         mov  a,r1
         cpl  a
         movx @dptr,a

         mov  a,bitmask       ;点亮该行
         mov  dptr,#RowLow
         movx @dptr,a
         mov  a,bitmask+1
         mov  dptr,#RowHigh
         movx @dptr,a

         clr  c
         mov  a,bitmask
         rlc  a
         mov  bitmask,a
         mov  a,bitmask+1
         rlc a
         mov  bitmask+1,a    ;指向下一行

         mov  r7,10
         call delay
         djnz r2, nextrow
	 djnz r4, loop       ;每个字要重复显示

	 inc  r5             ;指向下个汉字
	 mov  a,r5
	 cjne r5,#10, nextchar
         jmp  main           ;
nextchar:
         jmp  loop0

delay:
ddd:
         djnz r7,ddd
         ret

;字模   每个16x16点阵汉字为: 8位x2x16 = 256位, 32字节
Font:

DB  081H,000H,  061H,009H,  03FH,0FEH,  031H,00CH 
DB  029H,008H,  025H,018H,  023H,028H,  021H,048H 
DB  03FH,0F8H,  021H,048H,  003H,020H,  005H,010H  
DB  009H,008H,  011H,004H,  021H,002H,  040H,001H 

DB  081H,004H,  0FFH,0FFH,  021H,002H,  012H,004H  
DB  03FH,0FCH,  024H,034H,  022H,064H,  02FH,0F4H 
DB  021H,084H,  03FH,0FCH,  023H,024H,  025H,014H 
DB  029H,01CH,  031H,00CH,  020H,002H,  040H,001H

DB  081H,000H,  041H,001H,  021H,002H,  011H,004H 
DB  0FFH,0FEH,  005H,010H,  002H,0A0H,  003H,0C0H  
DB  002H,0C0H,  005H,040H,  006H,020H,  00CH,010H  
DB  018H,018H,  030H,00EH,  060H,006H,  040H,001H  

DB  090H,08CH,  04CH,0C9H,  028H,092H,  07FH,0FEH 
DB  048H,00CH,  08FH,0F8H,  002H,060H,  001H,0C0H  
DB  07FH,0FEH,  001H,0C0H,  002H,0A0H,  004H,090H  
DB  008H,088H,  012H,084H,  021H,002H,  040H,001H  

DB  08CH,060H,  058H,041H,  037H,0FEH,  030H,004H  
DB  03BH,0F8H,  054H,010H,  093H,0F8H,  011H,040H  
DB  013H,0F8H,  013H,048H,  012H,028H,  016H,018H  
DB  01BH,0F8H,  012H,00CH,  020H,002H,  040H,001H  

DB  082H,000H,  05FH,0F1H,  030H,012H,  01FH,0F4H 
DB  018H,018H,  01FH,0F0H,  012H,030H,  01FH,0F0H  
DB  000H,080H,  009H,040H,  02AH,0A4H,  02CH,092H  
DB  068H,01AH,  017H,0F4H,  020H,002H,  040H,001H 

DB  0FFH,0FCH,  044H,085H,  064H,086H,  054H,084H  
DB  04CH,08CH,  044H,094H,  046H,0A4H,  049H,0C4H  
DB  048H,0FCH,  051H,044H,  062H,024H,  044H,014H  
DB  07FH,0FCH,  050H,004H,  020H,002H,  040H,001H  

DB  0F9H,07EH,  061H,011H,  021H,012H,  031H,014H 
DB  02DH,018H,  0FDH,07EH,  027H,030H,  029H,050H
DB  021H,090H,  021H,050H,  03AH,030H,  0C6H,010H 
DB  00CH,0FEH,  018H,004H,  030H,002H,  040H,001H  

DB  080H,080H,  07FH,0FDH,  020H,082H,  03FH,0F4H 
DB  028H,098H,  03FH,0FCH,  022H,0B0H,  02FH,0F0H 
DB  020H,080H,  02FH,0F0H,  02AH,030H,  04CH,010H 
DB  04FH,0F8H,  098H,014H,  020H,002H,  040H,001H 

DB  082H,040H,  042H,021H,  022H,022H,  07FH,0FEH 
DB  00AH,088H,  006H,090H,  002H,0B0H,  005H,0E0H
DB  004H,0C0H,  009H,0C0H,  00BH,0A0H,  016H,092H
DB  028H,08AH,  050H,07EH,  020H,002H,  040H,001H