📄 startup.lst
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A51 MACRO ASSEMBLER STARTUP 03/26/2009 14:21:44 PAGE 1
MACRO ASSEMBLER A51 V8.01
OBJECT MODULE PLACED IN .\out-files\STARTUP.obj
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE keil c51 port\STARTUP.A51 SET(LARGE) DEBUG PRINT(.\list-files\STARTUP.lst)
OBJECT(.\out-files\STARTUP.obj) EP
LOC OBJ LINE SOURCE
1 $nomod51
2
00AA 3 EMI0CN DATA 0AAH
4
5 ;------------------------------------------------------------------------------
6 ; This file is part of the C51 Compiler package
7 ; Copyright (c) 1988-2002 Keil Elektronik GmbH and Keil Software, Inc.
8 ;------------------------------------------------------------------------------
9 ; STARTUP.A51: This code is executed after processor reset.
10 ;
11 ; To translate this file use A51 with the following invocation:
12 ;
13 ; A51 STARTUP.A51
14 ;
15 ; To link the modified STARTUP.OBJ file to your application use the following
16 ; BL51 invocation:
17 ;
18 ; BL51 <your object file list>, STARTUP.OBJ <controls>
19 ;
20 ;------------------------------------------------------------------------------
21 ;
22 ; User-defined Power-On Initialization of Memory
23 ;
24 ; With the following EQU statements the initialization of memory
25 ; at processor reset can be defined:
26 ;
27 ; ; the absolute start-address of IDATA memory is always 0
0100 28 IDATALEN EQU 100H ; the length of IDATA memory in bytes.
29 ;
0000 30 XDATASTART EQU 0H ; the absolute start-address of XDATA memory
0800 31 XDATALEN EQU 800H ;0EFFFH;the length of XDATA memory in bytes.
32 ;
0000 33 PDATASTART EQU 0H ; the absolute start-address of PDATA memory
0000 34 PDATALEN EQU 0H ; the length of PDATA memory in bytes.
35 ;
36 ; Notes: The IDATA space overlaps physically the DATA and BIT areas of the
37 ; 8051 CPU. At minimum the memory space occupied from the C51
38 ; run-time routines must be set to zero.
39 ;------------------------------------------------------------------------------
40 ;
41 ; Reentrant Stack Initilization
42 ;
43 ; The following EQU statements define the stack pointer for reentrant
44 ; functions and initialized it:
45 ;
46 ; Stack Space for reentrant functions in the SMALL model.
0000 47 IBPSTACK EQU 0 ; set to 1 if small reentrant is used.
0100 48 IBPSTACKTOP EQU 0FFH+1 ; set top of stack to highest location+1.
49 ;
50 ; Stack Space for reentrant functions in the LARGE model.
0001 51 XBPSTACK EQU 1 ; set to 1 if large reentrant is used.
0800 52 XBPSTACKTOP EQU 07ffH+1;0FFFFH+1; set top of stack to highest location+1.
53 ;LEON.Z MODIFIED THE ABOVE 2 LINES, 2003.1.20.
54 ; Stack Space for reentrant functions in the COMPACT model.
0000 55 PBPSTACK EQU 0 ; set to 1 if compact reentrant is used.
1000 56 PBPSTACKTOP EQU 0FFFH+1; set top of stack to highest location+1.
57 ;
A51 MACRO ASSEMBLER STARTUP 03/26/2009 14:21:44 PAGE 2
58 ;------------------------------------------------------------------------------
59 ;
60 ; Page Definition for Using the Compact Model with 64 KByte xdata RAM
61 ;
62 ; The following EQU statements define the xdata page used for pdata
63 ; variables. The EQU PPAGE must conform with the PPAGE control used
64 ; in the linker invocation.
65 ;
0000 66 PPAGEENABLE EQU 0 ; set to 1 if pdata object are used.
67 ;
0000 68 PPAGE EQU 0 ; define PPAGE number.
69 ;
00A0 70 PPAGE_SFR DATA 0A0H ; SFR that supplies uppermost address byte
71 ; (most 8051 variants use P2 as uppermost address byte)
72 ;
73 ;------------------------------------------------------------------------------
74
75 ; Standard SFR Symbols
00E0 76 ACC DATA 0E0H
00F0 77 B DATA 0F0H
0081 78 SP DATA 81H
0082 79 DPL DATA 82H
0083 80 DPH DATA 83H
81
00D9 82 PCA0MD DATA 0D9H
00FF 83 VDM0CN DATA 0FFH
00EF 84 RSTSRC DATA 0EFH
85
86 NAME ?C_STARTUP
87
88
89 ?C_C51STARTUP SEGMENT CODE
90 ?STACK SEGMENT IDATA
91
---- 92 RSEG ?STACK
0000 93 DS 1
94
95 EXTRN CODE (?C_START)
96 PUBLIC ?C_STARTUP
97
---- 98 CSEG AT 0
0000 020000 F 99 ?C_STARTUP: LJMP STARTUP1
100
---- 101 RSEG ?C_C51STARTUP
102
0000 53D9BF 103 STARTUP1: ANL PCA0MD,#0xBF ;Disable watchdog
104
0003 43FF80 105 ORL VDM0CN,#0x80 ;Enable VDD monitor
106
0006 7FC8 107 MOV R7, #0xC8
;Delay 5us
0008 DFFE 108 DELAY5US: DJNZ R7,DELAY5US
109
000A 43EF02 110 ORL RSTSRC,#0x02 ;Se
lect the VDD monitor as a reset source
111
112 IF IDATALEN <> 0
000D 78FF 113 MOV R0,#IDATALEN - 1
000F E4 114 CLR A
0010 F6 115 IDATALOOP: MOV @R0,A
0011 D8FD 116 DJNZ R0,IDATALOOP
117 ENDIF
118
119 IF XDATALEN <> 0
0013 900000 120 MOV DPTR,#XDATASTART
0016 7F00 121 MOV R7,#LOW (XDATALEN)
A51 MACRO ASSEMBLER STARTUP 03/26/2009 14:21:44 PAGE 3
122 IF (LOW (XDATALEN)) <> 0
MOV R6,#(HIGH (XDATALEN)) +1
ELSE
0018 7E08 125 MOV R6,#HIGH (XDATALEN)
126 ENDIF
001A E4 127 CLR A
001B 75AA01 128 MOV EMI0CN,#1
001E F0 129 XDATALOOP: MOVX @DPTR,A
001F A3 130 INC DPTR
0020 DFFC 131 DJNZ R7,XDATALOOP
0022 DEFA 132 DJNZ R6,XDATALOOP
133 ENDIF
134
135 IF PPAGEENABLE <> 0
MOV PPAGE_SFR,#PPAGE
ENDIF
138
139 IF PDATALEN <> 0
MOV R0,#LOW (PDATASTART)
MOV R7,#LOW (PDATALEN)
CLR A
PDATALOOP: MOVX @R0,A
INC R0
DJNZ R7,PDATALOOP
ENDIF
147
148 IF IBPSTACK <> 0
EXTRN DATA (?C_IBP)
MOV ?C_IBP,#LOW IBPSTACKTOP
ENDIF
153
154 IF XBPSTACK <> 0
155 EXTRN DATA (?C_XBP)
156
0024 750008 F 157 MOV ?C_XBP,#HIGH XBPSTACKTOP
0027 750000 F 158 MOV ?C_XBP+1,#LOW XBPSTACKTOP
159 ENDIF
160
161 IF PBPSTACK <> 0
EXTRN DATA (?C_PBP)
MOV ?C_PBP,#LOW PBPSTACKTOP
ENDIF
165
002A 758100 F 166 MOV SP,#?STACK-1
167 ; This code is required if you use L51_BANK.A51 with Banking Mode 4
168 ; EXTRN CODE (?B_SWITCH0)
169 ; CALL ?B_SWITCH0 ; init bank mechanism to code bank 0
002D 020000 F 170 LJMP ?C_START
171
172 END
A51 MACRO ASSEMBLER STARTUP 03/26/2009 14:21:44 PAGE 4
SYMBOL TABLE LISTING
------ ----- -------
N A M E T Y P E V A L U E ATTRIBUTES
?C_C51STARTUP. . . C SEG 0030H REL=UNIT
?C_START . . . . . C ADDR ----- EXT
?C_STARTUP . . . . C ADDR 0000H A
?C_XBP . . . . . . D ADDR ----- EXT
?STACK . . . . . . I SEG 0001H REL=UNIT
ACC. . . . . . . . D ADDR 00E0H A
B. . . . . . . . . D ADDR 00F0H A
DELAY5US . . . . . C ADDR 0008H R SEG=?C_C51STARTUP
DPH. . . . . . . . D ADDR 0083H A
DPL. . . . . . . . D ADDR 0082H A
EMI0CN . . . . . . D ADDR 00AAH A
IBPSTACK . . . . . N NUMB 0000H A
IBPSTACKTOP. . . . N NUMB 0100H A
IDATALEN . . . . . N NUMB 0100H A
IDATALOOP. . . . . C ADDR 0010H R SEG=?C_C51STARTUP
PBPSTACK . . . . . N NUMB 0000H A
PBPSTACKTOP. . . . N NUMB 1000H A
PCA0MD . . . . . . D ADDR 00D9H A
PDATALEN . . . . . N NUMB 0000H A
PDATASTART . . . . N NUMB 0000H A
PPAGE. . . . . . . N NUMB 0000H A
PPAGEENABLE. . . . N NUMB 0000H A
PPAGE_SFR. . . . . D ADDR 00A0H A
RSTSRC . . . . . . D ADDR 00EFH A
SP . . . . . . . . D ADDR 0081H A
STARTUP1 . . . . . C ADDR 0000H R SEG=?C_C51STARTUP
VDM0CN . . . . . . D ADDR 00FFH A
XBPSTACK . . . . . N NUMB 0001H A
XBPSTACKTOP. . . . N NUMB 0800H A
XDATALEN . . . . . N NUMB 0800H A
XDATALOOP. . . . . C ADDR 001EH R SEG=?C_C51STARTUP
XDATASTART . . . . N NUMB 0000H A
REGISTER BANK(S) USED: 0
ASSEMBLY COMPLETE. 0 WARNING(S), 0 ERROR(S)
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