?? start_ad.lst
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A51 MACRO ASSEMBLER START_AD 06/02/2008 11:06:07 PAGE 1
MACRO ASSEMBLER A51 V8.00
OBJECT MODULE PLACED IN START_AD.OBJ
ASSEMBLER INVOKED BY: d:\Keil\C51\BIN\A51.EXE START_AD.A51 SET(SMALL) DEBUG EP
LOC OBJ LINE SOURCE
1 $nomod51
2 ;------------------------------------------------------------------------------
3 ; This file is part of the C51 Compiler package
4 ; Startup Code for the Analog Devices ADuC83x and ADuC84x series
5 ; Copyright (c) 2001-2003 Keil Elektronik GmbH and Keil Software, Inc.
6 ; Version 1.02
7 ;------------------------------------------------------------------------------
8 ; START_AD.A51: This code is executed after processor reset.
9 ;
10 ; To translate this file use Ax51 with the following invocation:
11 ;
12 ; Ax51 STARTUP.A51
13 ;
14 ; To link the modified STARTUP.OBJ file to your application use the following
15 ; Lx51 invocation:
16 ;
17 ; Lx51 <your object file list>, STARTUP.OBJ <controls>
18 ;
19 ;------------------------------------------------------------------------------
20 ;
21 ; Setup Extended Data RAM
22 ;
23 ; On-chip XDATA RAM
24 ; XRAMEN Val Description
25 ; ------ --- -----------
0000 26 XRAMEN EQU 0; 0 = disable on-chip XDATA RAM and access off-chip XDATA space
27 ; ; 1 = enable on-chip XDATA RAM
28 ;
29 ; Extended Stack Mode (16-bit Stack Pointer)
30 ; EXSP Val Description
31 ; ---- --- -----------
0000 32 EXSP EQU 0 ; 0 = classic 8051 stack pointer (8-bit) addressing IDATA space
33 ; ; 1 = extended 16-bit stack pointer addressing XDATA space
34 ; NOTE: The Extended Stack Mode works only with enabled on-chip XDATA RAM!
35 ;
36 ; CPU Stack Size Definition in Extended Stack Mode:
37 ; The following EQU statements defines the stack space available in extended
38 ; stack mode (EXSP set to 1) for the application program. It should be noted
39 ; that the stack space must be adjusted according the actual requirements of
40 ; the application. This STARTUP file allocates the stack in extended stack
41 ; mode in XDATA memory beginning at XSTACKSTART. The extended stack must
42 ; be within the on-chip XDATA memory and XSTACKSTART must be not less than
43 ; 100H.
44 ;
0200 45 STACKSIZE EQU 200H ; set to 200H Bytes.
0600 46 XSTACKSTART EQU 800H - STACKSIZE ; 800H is top of on-chip XRAM.
47 ;
48 ;------------------------------------------------------------------------------
49 ;
50 ; User-defined Power-On Initialization of Memory
51 ;
52 ; With the following EQU statements the initialization of memory
53 ; at processor reset can be defined:
54 ;
55 ; ; the absolute start-address of IDATA memory is always 0
0080 56 IDATALEN EQU 80H ; the length of IDATA memory in bytes.
57 ;
0000 58 XDATASTART EQU 0H ; the absolute start-address of XDATA memory
A51 MACRO ASSEMBLER START_AD 06/02/2008 11:06:07 PAGE 2
0000 59 XDATALEN EQU 0H ; the length of XDATA memory in bytes.
60 ;
0000 61 PDATASTART EQU 0H ; the absolute start-address of PDATA memory
0000 62 PDATALEN EQU 0H ; the length of PDATA memory in bytes.
63 ;
64 ; Notes: The IDATA space overlaps physically the DATA and BIT areas of the
65 ; 8051 CPU. At minimum the memory space occupied from the C51
66 ; run-time routines must be set to zero.
67 ;------------------------------------------------------------------------------
68 ;
69 ; Reentrant Stack Initilization
70 ;
71 ; The following EQU statements define the stack pointer for reentrant
72 ; functions and initialized it:
73 ;
74 ; Stack Space for reentrant functions in the SMALL model.
0000 75 IBPSTACK EQU 0 ; set to 1 if small reentrant is used.
0100 76 IBPSTACKTOP EQU 0FFH+1 ; set top of stack to highest location+1.
77 ;
78 ; Stack Space for reentrant functions in the LARGE model.
0000 79 XBPSTACK EQU 0 ; set to 1 if large reentrant is used.
0000 80 XBPSTACKTOP EQU 0FFFFH+1; set top of stack to highest location+1.
81 ;
82 ; Stack Space for reentrant functions in the COMPACT model.
0000 83 PBPSTACK EQU 0 ; set to 1 if compact reentrant is used.
0000 84 PBPSTACKTOP EQU 0FFFFH+1; set top of stack to highest location+1.
85 ;
86 ;------------------------------------------------------------------------------
87 ;
88 ; Page Definition for Using the Compact Model with 64 KByte xdata RAM
89 ;
90 ; The following EQU statements define the xdata page used for pdata
91 ; variables. The EQU PPAGE must conform with the PPAGE control used
92 ; in the linker invocation.
93 ;
0001 94 PPAGEENABLE EQU 1 ; set to 1 if pdata object are used.
0000 95 PPAGE EQU 0 ; define PPAGE number.
96 ;
97 ;------------------------------------------------------------------------------
98
99 ; Define CPU Symbols
0081 100 sfr SP = 0x81;
00B7 101 sfr SPH = 0xB7;
00AF 102 sfr CFG8xx = 0xAF; ; Chip Configuration SFR
00A0 103 sfr P2 = 0xA0;
104
105 IF (EXSP = 1) AND (XRAMEN = 0)
__error__ "Extended Stack Mode requires enabled on-chip XDATA RAM"
ENDIF
108
109 IF (EXSP = 1) AND (XSTACKSTART < 100H)
__error__ "Extended Stack must start in XRAM above address 100H"
ENDIF
112
113 NAME ?C_STARTUP
114
115
116 ?C_C51STARTUP SEGMENT CODE
117
118 IF (EXSP = 1)
XSEG AT XSTACKSTART
DS STACKSIZE ; Stack Space 200H Bytes
ELSE
122 ?STACK SEGMENT IDATA
---- 123 RSEG ?STACK
0000 124 DS 1
A51 MACRO ASSEMBLER START_AD 06/02/2008 11:06:07 PAGE 3
125 ENDIF
126
127 EXTRN CODE (?C_START)
128 PUBLIC ?C_STARTUP
129
---- 130 CSEG AT 0
0000 020000 F 131 ?C_STARTUP: LJMP STARTUP1
132
---- 133 RSEG ?C_C51STARTUP
134
0000 135 STARTUP1:
136
0000 137 _CFG8xx EQU (EXSP SHL 7) OR (XRAMEN)
138
139 IF _CFG8xx
ORL CFG8xx,#_CFG8xx ; set extended memory modes
ENDIF
142
143 IF IDATALEN <> 0
0000 787F 144 MOV R0,#IDATALEN - 1
0002 E4 145 CLR A
0003 F6 146 IDATALOOP: MOV @R0,A
0004 D8FD 147 DJNZ R0,IDATALOOP
148 ENDIF
149
150 IF XDATALEN <> 0
MOV DPTR,#XDATASTART
MOV R7,#LOW (XDATALEN)
IF (LOW (XDATALEN)) <> 0
MOV R6,#(HIGH (XDATALEN)) +1
ELSE
MOV R6,#HIGH (XDATALEN)
ENDIF
CLR A
XDATALOOP: MOVX @DPTR,A
INC DPTR
DJNZ R7,XDATALOOP
DJNZ R6,XDATALOOP
ENDIF
164
165 IF PPAGEENABLE <> 0
0006 75A000 166 MOV P2,#PPAGE
167 ENDIF
168
169 IF PDATALEN <> 0
MOV R0,#PDATASTART
MOV R7,#LOW (PDATALEN)
CLR A
PDATALOOP: MOVX @R0,A
INC R0
DJNZ R7,PDATALOOP
ENDIF
177
178 IF IBPSTACK <> 0
EXTRN DATA (?C_IBP)
MOV ?C_IBP,#LOW IBPSTACKTOP
ENDIF
183
184 IF XBPSTACK <> 0
EXTRN DATA (?C_XBP)
MOV ?C_XBP,#HIGH XBPSTACKTOP
MOV ?C_XBP+1,#LOW XBPSTACKTOP
ENDIF
190
A51 MACRO ASSEMBLER START_AD 06/02/2008 11:06:07 PAGE 4
191 IF PBPSTACK <> 0
EXTRN DATA (?C_PBP)
MOV ?C_PBP,#LOW PBPSTACKTOP
ENDIF
195
196 IF EXSP = 1
MOV SP,#LOW (XSTACKSTART-1)
MOV SPH,#HIGH (XSTACKSTART-1)
ELSE
0009 758100 F 200 MOV SP,#?STACK-1
201 ENDIF
202
203 ;EXTRN CODE (?B_SWITCH0)
204 ; CALL ?B_SWITCH0 ; init bank mechanism to code bank 0
000C 020000 F 205 LJMP ?C_START
206
207 END
A51 MACRO ASSEMBLER START_AD 06/02/2008 11:06:07 PAGE 5
SYMBOL TABLE LISTING
------ ----- -------
N A M E T Y P E V A L U E ATTRIBUTES
?C_C51STARTUP. . . C SEG 000FH REL=UNIT
?C_START . . . . . C ADDR ----- EXT
?C_STARTUP . . . . C ADDR 0000H A
?STACK . . . . . . I SEG 0001H REL=UNIT
CFG8XX . . . . . . D ADDR 00AFH A
EXSP . . . . . . . N NUMB 0000H A
IBPSTACK . . . . . N NUMB 0000H A
IBPSTACKTOP. . . . N NUMB 0100H A
IDATALEN . . . . . N NUMB 0080H A
IDATALOOP. . . . . C ADDR 0003H R SEG=?C_C51STARTUP
P2 . . . . . . . . D ADDR 00A0H A
PBPSTACK . . . . . N NUMB 0000H A
PBPSTACKTOP. . . . N NUMB 0000H A
PDATALEN . . . . . N NUMB 0000H A
PDATASTART . . . . N NUMB 0000H A
PPAGE. . . . . . . N NUMB 0000H A
PPAGEENABLE. . . . N NUMB 0001H A
SP . . . . . . . . D ADDR 0081H A
SPH. . . . . . . . D ADDR 00B7H A
STACKSIZE. . . . . N NUMB 0200H A
STARTUP1 . . . . . C ADDR 0000H R SEG=?C_C51STARTUP
XBPSTACK . . . . . N NUMB 0000H A
XBPSTACKTOP. . . . N NUMB 0000H A
XDATALEN . . . . . N NUMB 0000H A
XDATASTART . . . . N NUMB 0000H A
XRAMEN . . . . . . N NUMB 0000H A
XSTACKSTART. . . . N NUMB 0600H A
_CFG8XX. . . . . . N NUMB 0000H A
REGISTER BANK(S) USED: 0
ASSEMBLY COMPLETE. 0 WARNING(S), 0 ERROR(S)
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