Mr.K
New Member
y is some numbers on da lookup table not appearin rignt on a sement display?
example numbers not showin correctly 2,5,7,9
da top portion will not display
heres da code
example numbers not showin correctly 2,5,7,9
da top portion will not display
heres da code
Code:
list p=16F84A ; list directive to define processor
__config 3FF9
;
;specify SFRs
pcl equ 02
status equ 03
porta equ 05
trisa equ 05
portb equ 06
trisb equ 06
;
pointer equ 10
delcntr1 equ 11
delcntr2 equ 12
;
org 00
;Initialise
start bsf status,5 ;select memory bank 1
movlw B'00011000'
movwf trisa ;port A according to above pattern
movlw 00
movwf trisb ;all port B bits output
bcf status,5 ;select bank 0
clrf portb
clrf pointer
;
;The "main" program starts here
movlw 00 ;clear all bits in port A
movwf porta
movwf pointer ;also clear pointer
loop movf pointer,0 ;move pointer to W register
call table
movwf portb ;move W register, updated from table SR, to portB
call delay
loop2 btfsc porta,0
incf pointer,1
btfsc porta,7
clrf pointer
goto loop
;
delay movlw D'255'
movwf delcntr2
outer movlw D'255'
movwf delcntr1
inner nop
nop
nop
nop
nop
decfsz delcntr1,1
goto inner
decfsz delcntr2,1
goto outer
return
;Holds Lookup Table
table addwf pcl,1
retlw B'01111110' ;0
retlw B'00110000' ;1
retlw B'01101101' ;2
retlw B'01111001' ;3
retlw B'00110011' ;4
retlw B'01011011' ;5
retlw B'01011111' ;6
retlw B'01110000' ;7
retlw B'01111111' ;8
retlw B'01111011' ;9
retlw B'01111101' ;a
retlw B'00011111' ;b
retlw B'00001101' ;c
retlw B'00111101' ;d
retlw B'01001111' ;e
retlw B'01000111' ;f
;end of program'
END