;Up/Down Counter for Bikes. ;Down for 1 then up for 2,3,4,5,6 ;or if up is pressed at the beginning, display shows 2 ; 12F629.asm ; 13-3-2010 list p=12F629 radix dec include "p12f629.inc" errorlevel -302 ; Dont complain about BANK 1 Registers during assembly __CONFIG _MCLRE_OFF & _CP_OFF & _WDT_OFF & _INTRC_OSC_NOCLKOUT ;Internal osc. temp1 equ 20h ; temp2 equ 21h ; temp3 equ 22h ; count equ 23h ; current value for display Sw_Flag equ 24h ; File5mS equ 25h FileXmS equ 26h ;**************************************************************** ;Equates ;**************************************************************** status equ 0x03 rp1 equ 0x06 rp0 equ 0x05 GPIO equ 0x05 status equ 03h option_reg equ 81h ; bits on GPIO pin7 equ 0 ;GP0 reset and cycle 1-6 on display - input pin6 equ 1 ;GP1 segments a low b high - output pin5 equ 2 ;GP2 segments c low d high - output pin4 equ 3 ;GP3 input only pin3 equ 4 ;GP4 segments e low f high - output pin2 equ 5 ;GP5 g low - output ;bits rp0 equ 5 ;bit 5 of the status register ;**************************************************************** ;Beginning of program ;**************************************************************** Start org 0x00 ;reset vector address nop nop nop nop ;NOPs to get past reset vector address nop nop ;set up to allow counting from external oscillator SetUp bsf status, rp0 ;Bank 1 movlw b'11001001' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw 07h ;Set up W to turn off Comparator ports movwf CMCON ;must be placed in bank 0 clrf GPIO ;Clear GPIO of junk clrf Sw_Flag clrf count ;initialise count = 0 ;incf count,f ;xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx goto M_First table addwf PCL,F ;02h,1 add W to program counter goto show0 ; "0" -|F|E|D|C|B|A goto show1 ; "1" -|-|-|-|C|B|- goto show2 ; "2" G|-|E|D|-|B|A goto show3 ; "3" G|-|-|D|C|B|A goto show4 ; "4" G|F|-|-|C|B|- goto show5 ; "5" G|F|-|D|C|-|A goto show6 ; "6" G|F|E|D|C|-|A goto show7 ; "7" -|-|-|-|C|B|A goto show8 ; "8" G|F|E|D|C|B|A goto show9 ; "9" G|F|-|D|C|B|A ;**************************************************************** ;* Delay 10mS 10 x 1,000uS * ;**************************************************************** _10mS movlw 0Ah movwf temp2 D_a nop decfsz temp1,1 goto D_a decfsz temp2,1 goto D_a retlw 00 _3mS movlw 03h movwf File5mS D_3mS nop decfsz FileXmS,1 ; ,1 denotes the result of the decrement goto D_3mS decfsz File5mS,1 ; is placed in the file goto D_3mS retlw 00 ;Delay 0.005 sec (5mS) _5mS movlw 05h movwf File5mS D_5mS nop decfsz FileXmS,1 ; ,1 denotes the result of the decrement goto D_5mS decfsz File5mS,1 ; is placed in the file goto D_5mS retlw 00 ;**************************** ;* Sub-routines * ;**************************** show0 bsf status, rp0 ;Bank 1 movlw b'11101001' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00000000' ;turn on a c e movwf GPIO call _5mS movlw b'00010110' ;turn on b d f movwf GPIO call _5mS retlw 00 show1 bsf status, rp0 ;Bank 1 movlw b'11111001' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00000100' ;turn on b c movwf GPIO call _5mS bsf status, rp0 ;Bank 1 movlw b'11111111' ;Set TRIS all input movwf TRISIO ; bcf status, rp0 ;bank 0 call _5mS ;turn all outputs off retlw 00 show2 bsf status, rp0 ;Bank 1 movlw b'11001101' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00010000' ; movwf GPIO call _5mS bsf status, rp0 ;Bank 1 movlw b'11111001' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00000010' ; movwf GPIO call _5mS ; retlw 00 show3 bsf status, rp0 ;Bank 1 movlw b'11011001' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00000000' ; movwf GPIO call _5mS bsf status, rp0 ;Bank 1 movlw b'11111001' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00000110' ; movwf GPIO call _5mS ; retlw 00 show4 bsf status, rp0 ;Bank 1 movlw b'11011011' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00000110' ; movwf GPIO call _5mS bsf status, rp0 ;Bank 1 movlw b'11101101' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00000000' ; movwf GPIO call _5mS ; retlw 00 show5 bsf status, rp0 ;Bank 1 movlw b'11011001' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00000010' ; movwf GPIO call _5mS bsf status, rp0 ;Bank 1 movlw b'11101011' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00000110' ; movwf GPIO call _5mS ; retlw 00 show6 bsf status, rp0 ;Bank 1 movlw b'11001001' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00000010' ; movwf GPIO call _5mS bsf status, rp0 ;Bank 1 movlw b'11101011' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00010110' ; movwf GPIO call _5mS ; retlw 00 show7 bsf status, rp0 ;Bank 1 movlw b'11111001' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00000000' ; movwf GPIO call _5mS bsf status, rp0 ;Bank 1 movlw b'11111101' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00010110' ; movwf GPIO call _5mS ; retlw 00 show8 bsf status, rp0 ;Bank 1 movlw b'11001001' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00100000' ; movwf GPIO call _5mS bsf status, rp0 ;Bank 1 movlw b'11111101' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00110110' ; movwf GPIO call _5mS ; retlw 00 show9 bsf status, rp0 ;Bank 1 movlw b'11011001' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00000000' ; movwf GPIO call _5mS bsf status, rp0 ;Bank 1 movlw b'11101001' ;Set TRIS movwf TRISIO ; bcf status, rp0 ;bank 0 movlw b'00110010' ; movwf GPIO call _5mS ; retlw 00 Up btfsc Sw_Flag,1 goto M1 bsf Sw_Flag,1 movlw 06h ;put 6 into w xorwf count,0 ;compare units file with 6 btfsc 03,2 ;zero flag in status file. Will be set if units is 6 goto M1 incf count,f ;increment display goto M1 ; Down btfsc Sw_Flag,1 goto M1 bsf Sw_Flag,1 movlw 01h ;put 1 into w xorwf count,0 ;compare units file with 1 btfsc 03,2 ;zero flag in status file. Will be set if units is 1 goto M1 movlw 00h ;put 0 into w xorwf count,0 ;compare units file with 1 btfsc 03,2 ;zero flag in status file. Will be set if units is 0 goto M1 decf count,f ;decrement display goto M1 ; Reset btfsc Sw_Flag,1 goto M1 bsf Sw_Flag,1 movlw 06h ;put 6 into w xorwf count,0 ;compare units file with 6 btfsc 03,2 ;zero flag in status file. Will be set if units is 6 goto $+3 incf count,f ;increment display goto M1 clrf count goto M1 ;**************************************************************** ;* Main * ;**************************************************************** ;On turn-on display 0 and detects reset down and UP M_First bsf status, rp0 ;Bank 1 movlw b'11111101' ;Set TRIS to detect switches GP0=in GP3=in movwf TRISIO ; bcf status, rp0 ;bank 0 btfsc GPIO,0 goto $+4 ;reset not pushed btfss GPIO,3 ;reset or down pushed goto Up ;down pushed but count UP!!! goto Reset ;reset pushed btfss GPIO,3 goto $+5 ;up pushed - display to show 2 clrf Sw_Flag ;nothing pushed movf count,w call table goto M_First incf count,1 goto Up Main bsf status, rp0 ;Bank 1 movlw b'11111101' ;Set TRIS to detect switches GP0=in GP3=in movwf TRISIO ; bcf status, rp0 ;bank 0 btfsc GPIO,0 goto $+4 ;reset not pushed btfss GPIO,3 ;reset or down pushed goto Down ;down pushed goto Reset ;reset pushed btfss GPIO,3 goto Up ;up pushed clrf Sw_Flag ;nothing pushed M1 movf count,w call table goto Main ;oscillator calibration call 03ffh movwf OSCCAL end