lcd.lst

由c51编译的Proteus仿真的计算器

A51 MACRO ASSEMBLER  LCD                                                                  11/03/2000 12:22:31 PAGE     1


MACRO ASSEMBLER A51 V6.02
OBJECT MODULE PLACED IN .\lcd.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE .\lcd.asm SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

                       1     
                       2      
                       3     
                       4     
                       5     
                       6     
                       7     
                       8     NAME    LCD
                       9     
                      10     ;Set up Code Segment and exports:
                      11     
                      12     LCD              SEGMENT CODE
----                  13     RSEG             LCD
                      14     
                      15                      PUBLIC  _output
                      16                      PUBLIC  initialise
                      17                      PUBLIC  clearscreen
                      18     
                      19     
                      20     ;LCD Register Addresses.
  0000                21     LCD_CMD_WR      equ     00h
  0001                22     LCD_DATA_WR     equ     01h
  0002                23     LCD_BUSY_RD     equ     02h
  0003                24     LCD_DATA_RD     equ     03h
  0080                25     LCD_PAGE        equ     80h
                      26     
                      27     ;LCD Commands
  0001                28     LCD_CLS         equ     1
  0002                29     LCD_HOME        equ     2
  0004                30     LCD_SETMODE     equ     4
  0008                31     LCD_SETVISIBLE  equ     8
  0010                32     LCD_SHIFT       equ     16
  0020                33     LCD_SETFUNCTION equ     32
  0040                34     LCD_SETCGADDR   equ     64
  0080                35     LCD_SETDDADDR   equ     128
                      36     
                      37     
                      38     
                      39     
                      40     ; Initialisation Routine for the LCD display.
0000 7430             41     initialise:     mov A,#030h                     ;1 line, 8 bits
0002 120000   F       42                     call wrcmd
0005 740C             43                     mov A,#LCD_SETVISIBLE + 4
0007 120000   F       44                     call wrcmd
000A 748F             45                     mov A,#LCD_SETDDADDR+15         ; Start at right hand side of the display
000C 120000   F       46                     call wrcmd
000F 7407             47                     mov A,#LCD_SETMODE + 3          ; Automatic Increment - Display shift left.
                               
0011 120000   F       48                     call wrcmd
0014 22               49                     ret
                      50     
                      51     ; We move the parameter (held in R7) into the Accumulator prior to writing it.
0015 EF               52     _output:        mov A,R7        
0016 120000   F       53                     call wrdata
0019 22               54                     ret
                      55     
                      56     
                      57     ;Clears the LCD display and sets the initialisation conditions.
A51 MACRO ASSEMBLER  LCD                                                                  11/03/2000 12:22:31 PAGE     2

001A 7401             58     clearscreen:    mov A,#LCD_CLS
001C 120000   F       59                     call wrcmd
001F 748F             60                     mov A,#LCD_SETDDADDR + 15
0021 120000   F       61                     call wrcmd
0024 22               62                     ret
                      63     
                      64                     
                      65                     
                      66     ;*****************************
                      67     ;******** SUBROUTINES ********
                      68     ;*****************************
                      69     
                      70     ;Sub routine to write command:
0025 75A080           71     wrcmd:          mov P2,#LCD_PAGE
0028 7800             72                     mov R0,#LCD_CMD_WR
002A F2               73                     movx @R0,A
002B 8007             74                     jmp wtbusy
                      75     
                      76     ; Subroutine to Write a Character to the LCD Display.
002D 75A080           77     wrdata:         MOV P2,#LCD_PAGE                                
0030 7801             78                     MOV R0,#LCD_DATA_WR
0032 EF               79                     MOV A,R7
0033 F2               80                     MOVX @R0,A
                      81     
                      82     
                      83     ; Subroutine to wait for a busy clear.  
0034 7902             84     wtbusy:         MOV R1,#LCD_BUSY_RD
0036 E3               85                     MOVX A,@R1
0037 20E7FA           86                     JB ACC.7,wtbusy
003A 22               87                     ret
                      88     
                      89                     END
A51 MACRO ASSEMBLER  LCD                                                                  11/03/2000 12:22:31 PAGE     3

SYMBOL TABLE LISTING
------ ----- -------


N A M E             T Y P E  V A L U E   ATTRIBUTES

ACC. . . . . . . .  D ADDR   00E0H   A   
CLEARSCREEN. . . .  C ADDR   001AH   R   SEG=LCD
INITIALISE . . . .  C ADDR   0000H   R   SEG=LCD
LCD. . . . . . . .  C SEG    003BH       REL=UNIT
LCD_BUSY_RD. . . .  N NUMB   0002H   A   
LCD_CLS. . . . . .  N NUMB   0001H   A   
LCD_CMD_WR . . . .  N NUMB   0000H   A   
LCD_DATA_RD. . . .  N NUMB   0003H   A   
LCD_DATA_WR. . . .  N NUMB   0001H   A   
LCD_HOME . . . . .  N NUMB   0002H   A   
LCD_PAGE . . . . .  N NUMB   0080H   A   
LCD_SETCGADDR. . .  N NUMB   0040H   A   
LCD_SETDDADDR. . .  N NUMB   0080H   A   
LCD_SETFUNCTION. .  N NUMB   0020H   A   
LCD_SETMODE. . . .  N NUMB   0004H   A   
LCD_SETVISIBLE . .  N NUMB   0008H   A   
LCD_SHIFT. . . . .  N NUMB   0010H   A   
P2 . . . . . . . .  D ADDR   00A0H   A   
WRCMD. . . . . . .  C ADDR   0025H   R   SEG=LCD
WRDATA . . . . . .  C ADDR   002DH   R   SEG=LCD
WTBUSY . . . . . .  C ADDR   0034H   R   SEG=LCD
_OUTPUT. . . . . .  C ADDR   0015H   R   SEG=LCD


REGISTER BANK(S) USED: 0 


ASSEMBLY COMPLETE.  0 WARNING(S), 0 ERROR(S)