📄 ds1620.asm
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add a,#1 ; mimute add 1
da a ; decimal adjust
mov minute,a
xrl a,#60h ; compare mintute equ 60
jnz ctc0_ret ; if not jmp return
mov minute,#0 ; if yet clear it
mov a,hour
add a,#1 ; hour add 1
da a ; decimal adjust
mov hour,a
xrl a,#23h ; compare hour equ 23
jnz ctc0_ret ; if not jmp return
mov hour,#0 ; if yet clear it
ctc0_ret: pop dpl
pop dph
pop a ; reload accumulator
pop psw ; reload program status word
reti
lcd_hex_asc: push a
swap a
call hex_asc
mov r3,a
call mlcd_data
pop a
push a
call hex_asc
mov r3,a
call mlcd_data
pop a
ret
;*********************************************
;* *
;* subroutine : send out the current time. *
;* *
;*********************************************
send_time: mov a,#pageaddr
clr lcda0
call pw2
mov a, #hcoladdr
acall pw2
mov a, #lcoladdr
acall pw2
mov a,hour
call lcd_hex_asc
mov r3,#':'
call mlcd_data
mov a,minute
call lcd_hex_asc
mov r3,#':'
call mlcd_data
mov a,second
call lcd_hex_asc
ret
main: call lcd_lf
setb rrst ; to start communication
setb rrst
mov cmd,#eeh
call out_cmd
clr rrst
setb rrst
mov cmd,#0ch ; write 0ch to 1620 to start config writing protecol
call out_cmd
mov cmd,#02h ; write config byte 02h to initilize 1620
call out_cmd
clr rrst
main_loop: setb rrst
mov cmd,#aah ; out cmd aah to start temp. reading protocol
call out_cmd
setb ddq
call get_temperature
clr rrst
mov a,temperaturel
clr c
rrc a ; divide 2
mov buffer,a
jnc main2
main2: mov a,#pageaddr+1
clr lcda0
call pw2
mov a,buffer
call hex2bcd
mov r3,a
;call lcd_data
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
call lcd_hex_asc
;mov a,r3
;call send_data
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
mov reading,a
mov r3,#'C'
call mlcd_data
call lcd_lf
mov a,#pageaddr+2
call pw2
;************************************************************
check_hi: clr c
mov a,buffer
cjne a,hi,print_high
hi_carry: mov a,buffer
call hex2bcd
call lcd_hex_asc
mov hi,buffer
jmp check_lo
print_high: jnc hi_carry
mov a,hi
call hex2bcd
call lcd_hex_asc
check_lo: mov a,#pageaddr+3
clr lcda0
call pw2
call lcd_lf
mov a,buffer
cjne a,lo,print_low
lo_carry: mov a,buffer
call hex2bcd
call lcd_hex_asc
mov lo,buffer
jmp check_exit
print_low: jc lo_carry
mov a,lo
call hex2bcd
call lcd_hex_asc
mov a,lo
jnz check_exit
mov lo,buffer
check_exit ret
hex2bcd: mov b,#10 ; a is hex data
div ab ; divide a by b
rl a
rl a
rl a
rl a
anl a,#0f0h
anl b,#00fh
orl a,b
ret
;************************************************************************
;* *
;* subroutine : out command to ds1260 *
;* *
;************************************************************************
out_cmd: mov b,#8 ; loop count
out_cmd1: mov a,cmd ; cmd(command for 1620) in register
anl a,#1 ;
jz out_cmd2
clr cclk
setb ddq
setb cclk
jmp out_cmd3
out_cmd2: clr cclk
clr ddq
setb cclk
out_cmd3: mov a,cmd ; rotate cmd register
rr a
mov cmd,a
dec b
mov a,b
xrl a,#0 ; is done of the loop count?
jnz out_cmd1
ret
get_temperature:
mov b,#8 ; count for data input time
get_temp1: clr cclk
mov c,ddq
mov acc.0,c
mov c,cclk
mov acc.1,c
mov c,rrst
mov acc.2,c
call shift_data2reg
setb cclk
dec b
mov a,b
xrl a,#0
jnz get_temp1 ; this loop can get bit 0..7 only.
clr cclk
mov c,ddq
mov acc.0,c
mov c,cclk
mov acc.1,c
mov c,rrst
mov acc.2,c
rrc a
setb cclk
mov a,temperatureh
rlc a ; c -> bit0 of temp. upper byte
mov temperatureh,a ; to temperature of high byte
anl temperatureh,#1 ; bit 0 is vaild only
setb cclk
ret
shift_data2reg: rrc a ; bit0 of accumulator -> c
mov a, temperaturel ;
rrc a ; c->7..0->c
mov temperaturel,a
ret
;* note: this chars. have be modify , not for use at normal display.
word_data:
db 00h,00h,00h,00h,00h,00h ; #20h
db ffh,ffh,ffh,00h,00h,00h ;! #21h
db ffh,ffh,ffh,ffh,ffh,ffh ;" #22h
db 14h,7fh,14h,7fh,14h,00h ;#
db 08h,1ch,3eh,7fh,1ch,1ch ;<- ;don' use
; db 24h,2ah,6bh,2ah,12h,00h ;$
db 23h,13h,08h,64h,62h,00h ;%
db 1ch,1ch,1ch,1ch,1ch,00h ;& ;don't use
db ffh,ffh,ffh,ffh,ffh,00h ;' ;note
db 00h,1ch,22h,41h,00h,00h ;(
db 00h,41h,22h,1ch,00h,00h ;)
db 14h,08h,3eh,08h,14h,00h ;*
db 08h,08h,3eh,08h,08h,00h ;+
db 00h,50h,30h,00h,00h,00h ;,
db 08h,08h,08h,08h,08h,00h ;-
db 00h,60h,60h,00h,00h,00h ;.
db 20h,10h,08h,04h,02h,00h ;/
db 3eh,51h,49h,45h,3eh,00h ;0
db 00h,42h,7fh,40h,00h,00h ;1
db 42h,61h,51h,49h,46h,00h ;2
db 21h,41h,45h,4bh,31h,00h ;3
db 18h,14h,12h,7fh,10h,00h ;4
db 27h,45h,45h,45h,39h,00h ;5
db 3ch,4ah,49h,49h,30h,00h ;6
db 01h,01h,79h,05h,03h,00h ;7
db 36h,49h,49h,49h,36h,00h ;8
db 06h,49h,49h,29h,1eh,00h ;9
db 00h,36h,36h,00h,00h,00h ;:
db 00h,56h,36h,00h,00h,00h ;;
db 08h,14h,22h,41h,00h,00h ;<
db 14h,14h,14h,14h,14h,00h ;=
db 00h,41h,22h,14h,08h,00h ;>
db 02h,01h,51h,09h,06h,00h ;?
db 32h,49h,79h,41h,3eh,00h ;@
db 7eh,11h,11h,11h,7eh,00h ;A
db 7fh,49h,49h,49h,36h,00h ;B
db 3eh,41h,41h,41h,22h,00h ;C
db 7fh,41h,41h,41h,3eh,00h ;D
db 7fh,49h,49h,49h,41h,00h ;E
db 7fh,09h,09h,09h,01h,00h ;F
db 3eh,41h,41h,49h,3ah,00h ;G
db 7fh,08h,08h,08h,7fh,00h ;H
db 00h,41h,7fh,41h,00h,00h ;I
db 20h,40h,41h,3fh,01h,00h ;J
db 7fh,08h,14h,22h,41h,00h ;K
db 7fh,40h,40h,40h,40h,00h ;L
db 7fh,02h,0ch,02h,7fh,00h ;M
db 7fh,04h,08h,10h,7fh,00h ;N
db 3eh,41h,41h,41h,3eh,00h ;O
db 7fh,09h,09h,09h,06h,00h ;P
db 3eh,41h,51h,21h,5eh,00h ;Q
db 7fh,09h,19h,29h,46h,00h ;R
db 46h,49h,49h,49h,31h,00h ;S
db 01h,01h,7fh,01h,01h,00h ;T
db 3fh,40h,40h,40h,3fh,00h ;U
db 1fh,20h,40h,20h,1fh,00h ;V
db 3fh,40h,38h,40h,3fh,00h ;W
db 63h,14h,08h,14h,63h,00h ;X
db 01h,02h,7ch,02h,01h,00h ;Y
db 61h,51h,49h,45h,43h,00h ;Z
db 00h,7fh,41h,41h,00h,00h ;[
db 00h,00h,00h,00h,00h,00h ;
db 00h,41h,41h,7fh,00h,00h ;]
db 00h,02h,01h,02h,00h,00h ;^
db 40h,40h,40h,40h,40h,00h ;_
db 00h,01h,02h,04h,00h,00h ;`
db 20h,54h,54h,54h,78h,00h ;a
db 7fh,48h,44h,44h,38h,00h ;b
db 38h,44h,44h,44h,20h,00h ;c
db 38h,44h,44h,48h,7fh,00h ;d
db 38h,54h,54h,54h,18h,00h ;e
db 08h,7eh,09h,01h,02h,00h ;f
db 0ch,52h,52h,52h,3eh,00h ;g
db 7fh,08h,04h,04h,78h,00h ;h
db 00h,44h,7dh,40h,00h,00h ;i
db 20h,40h,44h,3dh,00h,00h ;j
db 7fh,10h,28h,44h,00h,00h ;k
db 00h,41h,7fh,40h,00h,00h ;l
db 7ch,04h,18h,04h,78h,00h ;m
db 7ch,08h,04h,04h,78h,00h ;n
db 38h,44h,44h,44h,38h,00h ;o
db 7ch,14h,14h,14h,08h,00h ;p
db 08h,14h,14h,18h,7ch,00h ;q
db 7ch,08h,04h,04h,08h,00h ;r
db 08h,54h,54h,54h,20h,00h ;s
db 04h,3fh,44h,40h,20h,00h ;t
db 3ch,40h,40h,20h,7ch,00h ;u
db 1ch,20h,40h,20h,1ch,00h ;v
db 3ch,40h,30h,40h,3ch,00h ;w
db 44h,28h,10h,28h,44h,00h ;x
db 0ch,50h,50h,50h,3ch,00h ;y
db 44h,64h,54h,4ch,44h,00h ;z
; db 00h,08h,36h,41h,00h,00h ;{
; db 00h,00h,7fh,00h,00h,00h ;|
; db 00h,41h,36h,08h,00h,00h ;}
; db 08h,08h,2ah,1ch,08h,00h ;->
; db 08h,1ch,2ah,08h,08h,00h ;<-
; db 00h,00h,00h,00h,00h,00h ;
lcd_lf: clr lcda0
mov a, #hcoladdr
acall pw2
mov a, #lcoladdr
acall pw2
ret
end
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