MPASM 02.15 Released            EXPT7.ASM   3-3-2002  1:22:47         PAGE  1


LOC  OBJECT CODE     LINE SOURCE TEXT
  VALUE

                    00001         ;Expt7.asm
                    00002         ;Project: Siren Sound
                    00003         ;List P = 16F84
                    00004         ;#include <p16F84.inc>
                    00005         ;__CONFIG 1Bh    ;_CP_OFF & _PWRTE_ON & _WDT_OFF & _RC_OSC
                    00006 
                    00007 
0000                00008         ORG 0           ;This is the start of memory for the program.
0000 1683           00009 SETUP   BSF 03,5        ;Go to Bank 1
0001 0186           00010         CLRF 06         ;Make all port B output         
0002 1283           00011         BCF 03,5        ;Go to Bank 0 - the program memory area.        
0003 0186           00012         CLRF 06         ;Clear display
0004 2805           00013         GOTO SIREN
                    00014 
0005 3080           00015 SIREN   MOVLW 80H       ;Number of cycles for each tone
0006 008E           00016         MOVWF 0EH
0007 0090           00017         MOVWF 10H
0008 3050           00018         MOVLW 50H       ;Number of steps
0009 008F           00019         MOVWF 0FH       ;File 0F holds the number of steps
000A 3050           00020         MOVLW 50H       ;Determines frequency
000B 008C           00021         MOVWF 0CH       ;File 0C determines the frequency
000C 080C           00022 REPEAT  MOVF 0CH,0      ;File 0C is moved to W
000D 008D           00023         MOVWF 0D        ;W is moved to file 0D for decrementing
000E 1786           00024 ON      BSF 06,7        ;Length of HIGH time to Piezo
000F 0B8D           00025         DECFSZ 0D,1
0010 280E           00026         GOTO ON         ;
0011 008D           00027         MOVWF 0DH       ;W is moved to file 0D again
0012 1386           00028 OFF     BCF 06,7        ;Length of LOW time to Piezo
0013 0B8D           00029         DECFSZ 0D,1
0014 2812           00030         GOTO OFF        ;
0015 0B90           00031         DECFSZ 10H,1    ;Number of cycles for each tone
0016 280C           00032         GOTO REPEAT
0017 038C           00033         DECF 0C,1       ;HIGH and LOW is shortened -tone rises
0018 0A8E           00034         INCF 0E,1       ;Increase the number of cycles
0019 080E           00035         MOVF 0E,0       ;File 0E to W
001A 0090           00036         MOVWF 10H       ;W to file 10h
001B 0B8F           00037         DECFSZ 0F,1     ;Number of steps
001C 280C           00038         GOTO REPEAT     ;
001D 2805           00039         GOTO SIREN
                    00040 
                    00041         END             ;Tells assembler end of program
MPASM 02.15 Released            EXPT7.ASM   3-3-2002  1:22:47         PAGE  2


SYMBOL TABLE
  LABEL                             VALUE 

OFF                               00000012
ON                                0000000E
REPEAT                            0000000C
SETUP                             00000000
SIREN                             00000005
__16F84                           00000001


MEMORY USAGE MAP ('X' = Used,  '-' = Unused)

0000 : XXXXXXXXXXXXXXXX XXXXXXXXXXXXXX-- ---------------- ----------------

All other memory blocks unused.

Program Memory Words Used:    30
Program Memory Words Free:   994


Errors   :     0
Warnings :     0 reported,     0 suppressed
Messages :     0 reported,     0 suppressed