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源程序:
;********************************************************
;
; LED flash control 2
;
; Device : PIC16F84A
; Clock : 4MHz
; Author : Seiichi Inoue
;********************************************************
list p=pic16f84a
include p16f84a.inc
__config _hs_osc & _wdt_off & _pwrte_on & _cp_off
errorlevel -302 ;Eliminate bank warning
;**************** Label Definition ********************
cblock h'0c'
loop_cnt ;Loop counter for LED cnt
led_data0 ;LED data 0
led_data1 ;LED data 1
led01 ;LED 01 pattern
led10 ;LED 10 pattern
led11 ;LED 11 pattern
port_work ;LED data save area
counter ;Software timer counter
ptn_save ;Pattern number save area
ptn_counter ;Pattern counter
w_save ;W register save area
s_save ;STATUS regi save area
endc
ra0 equ 00 ;RA0 bit
ra1 equ 01 ;RA1 bit
ra2 equ 02 ;RA2 bit
;**************** Speed control data ********************
speed equ 1 ;100ms (+1=50ms)
;************* Brightness control data ****************
led1 equ b'11111110' ;(01) almost dim
led2 equ b'11111010' ;(10) less bright
led3 equ b'11110000' ;(11) bright
;************* Pattern Data Definition ****************
; 1 bright 1 less bright 0 almost dim 0 dim
; 1 0 1 0
;****** Pattern 0 ******
p000 equ b'00000000'
p001 equ b'00000000'
p010 equ b'10000001'
p011 equ b'10000001'
p020 equ b'11000011'
p021 equ b'01000010'
p030 equ b'01100110'
p031 equ b'10100101'
p040 equ b'00111100'
p041 equ b'01011010'
p180 equ b'11000000'
p181 equ b'10100000'
p190 equ b'10000000'
p191 equ b'01000000'
p1a0 equ b'00000000'
p1a1 equ b'10000000'
;****** Pattern 2 ******
p200 equ b'00000000'
p201 equ b'00000000'
p210 equ b'10000000'
p211 equ b'10000000'
p220 equ b'11000000'
p221 equ b'01000000'
p230 equ b'01100000'
p231 equ b'10100000'
p240 equ b'00110000'
p241 equ b'01010000'
p250 equ b'00011000'
p251 equ b'00101000'
p260 equ b'00001100'
p261 equ b'00010100'
p270 equ b'00000110'
p271 equ b'00001010'
;**************** Program Start ***********************
org 0 ;Reset Vector
goto init
org 4 ;Interrupt Vector
goto int
;****************** Initial Process *******************
init
;*** Set Port mode
bsf status,rp0 ;Change to Bank1
movlw b'00000111' ;RA2-0:IN mode
movwf trisa ;Set TRISA reg
movlw b'00000000' ;RB7-0:OUT mode
movwf trisb ;Set TRISB reg
;*** Set Option reg
movlw b'10000111' ;RBPU=OFF,PSA=0,PS=1:256
movwf option_reg ;Set OPTION_REG
bcf status,rp0 ;Change to Bank0
;*** Set work area
clrf led_data0 ;Clear LED data0
clrf led_data1 ;Clear LED data1
movlw led1 ;Read 01 pattern
movwf led01 ;Set 01 pattern
movlw led2 ;Read 10 pattern
movwf led10 ;Set 10 pattern
movlw led3 ;Read 11 pattern
movwf led11 ;Set 11 pattern
clrf port_work ;Clear LED data save area
movlw speed ;Read speed data
addlw d'1' ;+1 addition
movwf counter ;Set counter
movlw d'1' ;Set pattern data
movwf ptn_save ;Set pattern 0
clrf ptn_counter ;Clear pattern counter
;*** Set TMR0 reg
movlw d'61' ;256-50ms/0.256ms = 61
movwf tmr0 ;Set 50msec to TMR0
movlw b'10100000' ;GIE=1,TOIE=1
movwf intcon ;Interruption enable
;**************** LED control Process ******************
loop
movlw d'4' ;Set loop counter data
movwf loop_cnt ;Set loop counter
loop1
movlw d'1' ;Set check data
subwf loop_cnt,w ;Check exec times
btfss status,z ;Counter = 1 ?
goto next2 ;No.
goto process4 ;Jump to Process4
next2
movlw d'2' ;Set check data
subwf loop_cnt,w ;Check exec times
btfss status,z ;Counter = 2 ?
goto next3 ;No.
goto process3 ;Jump to Process3
next3
movlw d'3' ;Set check data
subwf loop_cnt,w ;Check exec times
btfss status,z ;Counter = 3 ?
goto next4 ;No.
goto process2 ;Jump to Process2
next4
movlw d'4' ;Set check data
subwf loop_cnt,w ;Check exec times
btfss status,z ;Counter = 4 ?
goto loop ;No. illegal
goto process1 ;Jump to Process1
led_cont
movfw port_work ;Read PORT WORK data
movwf portb ;Set PORTB
next
decfsz loop_cnt,f ;Count down
goto loop1 ;Next Process
goto loop ;Next Period
process1
;****************** bit0 for process1 *******************
btfss led_data0,0 ;1x ?
goto p10_0x ;No.
btfss led_data1,0 ;11 ?
goto p10_10 ;Jump to 10 process
goto p10_11 ;Jump to 11 process
p10_0x
btfsc led_data1,0 ;01 ?
goto p10_01 ;Jump to 01 process
p10_00
goto p10_set ;LED off
p10_01
btfss led01,0 ;Data = 1 ?
goto p10_clear ;No.
goto p10_set ;Yes.
p10_10
btfss led10,0 ;Data = 1 ?
goto p10_clear ;No.
goto p10_set ;Yes.
p10_11
btfss led11,0 ;Data = 1 ?
goto p10_clear ;No.
p10_set
bsf port_work,0 ;Set bit0
goto bit1_process1
p10_clear
bcf port_work,0 ;Clear bit0
bit1_process1
;****************** bit1 for process1 *******************
btfss led_data0,1 ;1x ?
goto p11_0x ;No.
btfss led_data1,1 ;11 ?
goto p11_10 ;Jump to 10 process
goto p11_11 ;Jump to 11 process
p11_0x
btfsc led_data1,1 ;01 ?
goto p11_01 ;Jump to 01 process
p11_00
goto p11_set ;LED off
p11_01
btfss led01,0 ;Data = 1 ?
goto p11_clear ;No.
goto p11_set ;Yes.
p11_10
btfss led10,0 ;Data = 1 ?
goto p11_clear ;No.
goto p11_set ;Yes.
p11_11
btfss led11,0 ;Data = 1 ?
goto p11_clear ;No.
p11_set
bsf port_work,1 ;Set bit1
goto bit2_process1
p11_clear
bcf port_work,1 ;Clear bit1
bit2_process1
;****************** bit2 for process1 *******************
btfss led_data0,2 ;1x ?
goto p12_0x ;No.
btfss led_data1,2 ;11 ?
goto p12_10 ;Jump to 10 process
goto p12_11 ;Jump to 11 process
p12_0x
btfsc led_data1,2 ;01 ?
goto p12_01 ;Jump to 01 process
p12_00
goto p12_set ;LED off
p12_01
btfss led01,0 ;Data = 1 ?
goto p12_clear ;No.
goto p12_set ;Yes.
p12_10
btfss led10,0 ;Data = 1 ?
goto p12_clear ;No.
goto p12_set ;Yes.
p12_11
btfss led11,0 ;Data = 1 ?
goto p12_clear ;No.
p12_set
bsf port_work,2 ;Set bit2
goto bit3_process1
p12_clear
bcf port_work,2 ;Clear bit2
bit3_process1
;****************** bit3 for process1 *******************
btfss led_data0,3 ;1x ?
goto p13_0x ;No.
btfss led_data1,3 ;11 ?
goto p13_10 ;Jump to 10 process
goto p13_11 ;Jump to 11 process
p13_0x
btfsc led_data1,3 ;01 ?
goto p13_01 ;Jump to 01 process
p13_00
goto p13_set ;LED off
p13_01
btfss led01,0 ;Data = 1 ?
goto p13_clear ;No.
goto p13_set ;Yes.
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