; 汽车防盗器报警声
;频率分两个0.1s第一个
;0.1S频率从1.8K-3.5K匀速增加第二个0.1S频率从3.5K-1.8K匀速减少,
;程序复位后,按S2喇叭叫两声,按S3喇叭叫15秒,中途可按S5停止.
;=========================================================
LIST P=16F84A,R=DEC
__CONFIG B11111111110001;_CP_OFF&_WDT_OFF&_PWRITE_ON&_XT_OSC
RTCC EQU 01H ;定义各寄存器
PC EQU 02H
STATUS EQU 03H
C EQU 0
RP0 EQU 5
;----------------------
PORTA EQU 05H
PORTB EQU 06H
TRISA EQU 5H
TRISB EQU 6H
;-----------------------
SOUNDDELAY1 EQU 10H ;声音频率变化计数器，从1.8~3.55KHz
FRE_COUNT EQU 11H ;同一频率的重复次数保存地址
FRE_REPEAT EQU 12H
SOUND_TEMP EQU 13H
TEMP EQU 14H ;暂存寄存器
S_LOOP EQU 46 ;93-47=46
S_MAX EQU 93 ;最低频率1.8K 93*3=280US*2
S_MIN EQU 47 ;最高频率3.55K 47*3=140*2
S_REPEAT EQU 4 ;同一频率重复次数
;----------------------RA
KEY1 EQU 3
KEY2 EQU 4
;----------------------RB
KEY3 EQU 0
KEY4 EQU 1
;--------------------
ORG 0000H
MAIN
CLRF PORTA
CLRF PORTB ;初始化IO口
BSF STATUS,RP0
MOV LW 0011000B
MOV WF TRISA
MOV LW 00000011B
MOV WF TRISB
BCF STATUS,RP0
LOOP
BTFSS PORTA,KEY1 ;扫描按键
GOTO SET_1
BTFSS PORTA,KEY2
GOTO SET_2
GOTO LOOP
;--------------------------------------------
SET_1
BTFSC PORTA,KEY1 ;去抖动
GOTO LOOP
CALL SOUNDDELAY
BTFSC PORTA,KEY1 ;按S2叫两声
GOTO LOOP
CALL SOUND200MS
CALL SOUND200MS
GOTO LOOP
;--------------------------------------------
SET_2
BTFSC PORTA,KEY2 ;去抖动
GOTO LOOP
CALL SOUNDDELAY
BTFSC PORTA,KEY2 ;按S3叫15秒
GOTO LOOP
CALL SOUND15S
GOTO LOOP
;- - ----------------------------------------
SOUND200MS
MOV LW S_LOOP
MOV WF FRE_COUNT ;46=93-47
SOUND_LH_LP
MOV LW S_REPEAT ;同一频率重复次数送FRE_REPEAT
MOV WF FRE_REPEAT
MOV FW FRE_COUNT
ADDLW S_MIN ;计数值加最小值
MOV WF TEMP
REPEAT0_LP
MOV FW TEMP
BSF PORTA,0
CALL SOUNDDELAY0 ;廷时W*3US
BCF PORTA,0
MOV FW TEMP
CALL SOUNDDELAY0
DECFSZ FRE_REPEAT,1 ;每四次减频率计数一次
GOTO REPEAT0_LP
DECFSZ FRE_COUNT,1
GOTO SOUND_LH_LP
SOUND_HL
MOV LW S_LOOP
MOV WF FRE_COUNT ;46=93-47
SOUND_HL_LP
MOV LW S_REPEAT ;同一频率重复次数送FRE_REPEAT
MOV WF FRE_REPEAT
MOV FW FRE_COUNT
SUBLW S_MAX ;最大值减计数值
MOV WF TEMP
REPEAT1_LP
MOV FW TEMP
BSF PORTA,0
CALL SOUNDDELAY0 ;廷时W*3US
BCF PORTA,0
MOV FW TEMP
CALL SOUNDDELAY0
DECFSZ FRE_REPEAT,1;四次减频率计数一次
GOTO REPEAT1_LP
DECFSZ FRE_COUNT,1
GOTO SOUND_HL_LP
SOUND_END
RETLW 0
;------------------------------
SOUNDDELAY: ;廷时255*3US+2US
MOV LW 255
SOUNDDELAY0
MOV WF SOUNDDELAY1 ;廷时W*3US+1US
SOUNDDELAYUS_1
DECFSZ SOUNDDELAY1,1
GOTO SOUNDDELAYUS_1
RETLW 0
;---------------------
SOUND15S ;报警15秒
MOV LW 73
MOV WF SOUND_TEMP
SOUND1S_LP
CALL SOUND200MS;
BTFSS PORTB,KEY4 ;按S5退出
RETLW 0
DECFSZ SOUND_TEMP,1
GOTO SOUND1S_LP
RETLW 0
;------------------------
END
本文关键字：单片机 汽车 防盗器 PIC单片机，单片机-工控设备 - PIC单片机
