温度自动控制系统原理图及源程序 第9页
mov a,column2
anl a,#3fh
orl a,#40h
mov com,a
lcall prr0
mov ccolumn2,#0
ljmp lp2
over2:
ret
;*****************左半屏写入汉字子程序*****************
writeleft2:
mov dptr,#table2
push column3
mov cpage3,#2
mov ccolumn3,#0
mov a,pagef3
anl a,#07h
orl a,#0b8h
mov com,a
lcall prm0
mov a,column3
anl a,#3fh
orl a,#40h
mov com,a
lcall prm0
mov a,code
mov b,#32
mul ab
add a,dpl
mov dpl,a
mov a,b
addc a,dph
mov dph,a
lp3:
mov a,#00h
movc a,@a+dptr
mov dat,a
lcall prm1
inc ccolumn3
mov a,ccolumn3
inc dptr
cjne a,#16,lp3
dec cpage3
inc pagef3
mov a,cpage3
jz over3
mov a,pagef3
anl a,#07h
orl a,#0b8h
mov com,a
lcall prm0
pop column3
mov a,column3
anl a,#3fh
orl a,#40h
mov com,a
lcall prm0
mov ccolumn3,#0
ljmp lp3
over3:
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;
writeright2: ; 右半屏写入汉字子程序
mov dptr,#table2
push column4
mov cpage4,#2
mov ccolumn4,#0
mov a,pagef4
anl a,#07h
orl a,#0b8h
mov com,a
lcall prr0
mov a,column4
anl a,#3fh
orl a,#40h
mov com,a
lcall prr0
mov a,code
mov b,#32
mul ab
add a,dpl
mov dpl,a
mov a,b
addc a,dph
mov dph,a
lp4:
mov a,#00h
movc a,@a+dptr
mov dat,a
lcall prr1
inc ccolumn4
mov a,ccolumn4
inc dptr
cjne a,#16,lp4
dec cpage4
inc pagef4
mov a,cpage4
jz over4
mov a,pagef4
anl a,#07h
orl a,#0b8h
mov com,a
lcall prr0
pop column4
mov a,column4
anl a,#3fh
orl a,#40h
mov com,a
lcall prr0
mov ccolumn4,#0
ljmp lp4
over4:
ret
;*******************右半屏写入数字子程序****************
writeleft1:
mov dptr,#table1
push column2
mov cpage2,#2
mov ccolumn2,#0
mov a,pagef2
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