led1s.lst

代码保护功能处于持续发展中。Microchip 承诺将不断改进产品的代码保护功能。任何试图破坏Microchip 代码保护功能的行为均可视 为违反了《数字器件千年版权法案（Digital Mille

MPASM 03.70.01 Released                             LED1S.ASM   2-28-2006  19:49:33         PAGE  1


LOC  OBJECT CODE     LINE SOURCE TEXT
  VALUE

                      00001 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
                      00002 ;
                      00003 ;       Source File:    LED1S.ASM               
                      00004 ;       Author:         MPB              
                      00005 ;       Date:           2-12-05      
                      00006 ;
                      00007 ;       Output binary count is stepped manually
                      00008 ;       and reset with push buttons. 
                      00009 ;       Demonstrates software delay switch debounce
                      00010 ;
                      00011 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; 
                      00012 
                      00013         PROCESSOR 16F877        ; Define MCU type
2007   3733           00014         __CONFIG 0x3733         ; Set config fuses
                      00015 
                      00016 ; Register Label Equates....................................
                      00017         
  00000006            00018 PORTB   EQU     06      ; Port B Data Register  
  00000008            00019 PORTD   EQU     08      ; Port D Data Register
  00000088            00020 TRISD   EQU     88      ; Port B Direction Register
  00000020            00021 Timer   EQU     20      ; GPR used as delay counter
                      00022 
                      00023 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
                      00024 
                      00025 ; Initialise Port B (Port A defaults to inputs).............
                      00026         
0000   1683 1303      00027         BANKSEL TRISD           ; Select bank 1
0002   3000           00028         MOVLW   b'00000000'     ; Port B Direction Code
Message[302]: Register in operand not in bank 0.  Ensure that bank bits are correct.
0003   0088           00029         MOVWF   TRISD           ; Load the DDR code into F86
0004   1283 1303      00030         BANKSEL PORTD           ; Select bank 0
0006   280B           00031         GOTO    reset           ; Jump to main loop
                      00032 
                      00033 ; 'delay' subroutine ........................................
                      00034         
0007   00A0           00035 delay   MOVWF   Timer           ; Copy W to timer register
Message[305]: Using default destination of 1 (file).
0008   0BA0           00036 down    DECFSZ  Timer           ; Decrement timer register 
0009   2808           00037         GOTO    down            ; and repeat until zero
000A   0008           00038         RETURN                  ; Jump back to main program
                      00039 
                      00040 ; Start main loop ...........................................
                      00041 
000B   0188           00042 reset   CLRF    PORTD           ; Clear LEDs 
                      00043 
000C   1C86           00044 start   BTFSS   PORTB,1         ; Test reset button
000D   280B           00045         GOTO    reset           ; and clear LEDs
000E   1906           00046         BTFSC   PORTB,2         ; Test step button
000F   280C           00047         GOTO    start           ; and repeat if not pressed
                      00048 
0010   30FF           00049         MOVLW   0FF             ; Delay count literal
0011   2007           00050         CALL    delay           ; Wait for count
0012   1D06           00051         BTFSS   PORTB,2         ; Test step button
MPASM 03.70.01 Released                             LED1S.ASM   2-28-2006  19:49:33         PAGE  2


LOC  OBJECT CODE     LINE SOURCE TEXT
  VALUE

0013   280C           00052         GOTO    start           ; and wait if not released
Message[305]: Using default destination of 1 (file).
0014   0A88           00053         INCF    PORTD           ; Increment LEDs 
0015   280C           00054         GOTO    start           ; Repeat always
                      00055 
                      00056         END                     ; Terminate source code
MPASM 03.70.01 Released                             LED1S.ASM   2-28-2006  19:49:33         PAGE  3


SYMBOL TABLE
  LABEL                             VALUE 

PORTB                             00000006
PORTD                             00000008
TRISD                             00000088
Timer                             00000020
__16F877                          00000001
delay                             00000007
down                              00000008
reset                             0000000B
start                             0000000C


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

0000 : XXXXXXXXXXXXXXXX XXXXXX---------- ---------------- ----------------
2000 : -------X-------- ---------------- ---------------- ----------------

All other memory blocks unused.

Program Memory Words Used:    22
Program Memory Words Free:  8170


Errors   :     0
Warnings :     0 reported,     0 suppressed
Messages :     3 reported,     0 suppressed