startu32.lst

用keil开发的.单片机税控器程序.单片机用的是AT公司的.upsd3245

A51 MACRO ASSEMBLER  STARTU32                                                             03/28/2006 09:48:44 PAGE     1


MACRO ASSEMBLER A51 V8.00
OBJECT MODULE PLACED IN STARTU32.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE STARTU32.A51 SET(LARGE) DEBUG EP

LOC  OBJ            LINE     SOURCE

                       1     $nomod51 
                       2     ;------------------------------------------------------------------------------
                       3     ;  Startu32.a51
                       4     ;
                       5     ;  Version:
                       6     ;  September 2004 Version 0.7 - Removed code that disables the DDC SRAM as it is
                       7     ;                                disabled by default upon reset.
                       8     ;  July 2004 Version 0.6 - Comments edited, added note about DDC SRAM related to
                       9     ;                           date code.
                      10     ;  June 2004 Version 0.5 - Comments edited, code to disable DDC SRAM corrected.
                      11     ;  Dependencies: None
                      12     ;
                      13     ;
                      14     ;  Description:
                      15     ;  This code is executed after a reset.  Besides the usual C51 startup 
                      16     ;  settings, other uPSD Turbo initializations can be added here.  When
                      17     ;  the startup code execution is complete, this code jumps to C_START that is 
                      18     ;  typically the main() function in the C code.
                      19     ;
                      20     ;  Notes:
                      21     ;   - Watchdog timer is disabled - should be enabled at beginning of user's code
                      22     ;   - DDC and its RAM is disabled
                      23     ;   - Various IP prescalers are set to large values (lowers power consumption)
                      24     ;     The IP device drivers must initialize the prescalers appropriately.
                      25     ;
                      26     ;  Copyright (c) 2004 STMicroelectronics Inc.
                      27     ;
                      28     ;  This example demo code is provided as is and has no warranty,
                      29     ;  implied or otherwise.  You are free to use/modify any of the provided
                      30     ;  code at your own risk in your applications with the expressed limitation
                      31     ;  of liability (see below) so long as your product using the code contains
                      32     ;  at least one uPSD product (device).
                      33     ;
                      34     ;  LIMITATION OF LIABILITY:   NEITHER STMicroelectronics NOR ITS VENDORS OR 
                      35     ;  AGENTS SHALL BE LIABLE FOR ANY LOSS OF PROFITS, LOSS OF USE, LOSS OF DATA,
                      36     ;  INTERRUPTION OF BUSINESS, NOR FOR INDIRECT, SPECIAL, INCIDENTAL OR
                      37     ;  CONSEQUENTIAL DAMAGES OF ANY KIND WHETHER UNDER THIS AGREEMENT OR
                      38     ;  OTHERWISE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
                      39     ;------------------------------------------------------------------------------
                      40     
                      41     
                      42     ;  User-defined Power-On Initialization of Memory (Clear Memory)
                      43     ;
                      44     ;  With the following EQU statements the initialization of memory
                      45     ;  at processor reset can be defined:
                      46     
                      47     ;               ; the absolute start-address of IDATA memory is always 0
  0100                48     IDATALEN        EQU     100H    ; the length of IDATA memory in bytes.
                      49     
                      50     ; *** NOTE: uPSD users need to fill in the following based on where SRAM memory mapped.
                      51     
  0000                52     XDATASTART      EQU     0H      ; the absolute start-address of XDATA memory
  0000                53     XDATALEN        EQU     0H      ; the length of XDATA memory in bytes.
                      54     
  0000                55     PDATASTART      EQU     0H      ; the absolute start-address of PDATA memory
  0000                56     PDATALEN        EQU     0H      ; the length of PDATA memory in bytes.
                      57     
                      58     ;  Notes:  The IDATA space overlaps physically the DATA and BIT areas of the
A51 MACRO ASSEMBLER  STARTU32                                                             03/28/2006 09:48:44 PAGE     2

                      59     ;          8051 CPU. At minimum the memory space occupied from the C51 
                      60     ;          run-time routines must be set to zero.
                      61     
                      62     
                      63     ;------------------------------------------------------------------------------
                      64     ;
                      65     ;  Reentrant Stack Initilization
                      66     ;
                      67     ;  The following EQU statements define the stack pointer for reentrant
                      68     ;  functions and initialized it:
                      69     ;
                      70     ;  Stack Space for reentrant functions in the SMALL model.
  0000                71     IBPSTACK        EQU     0       ; set to 1 if small reentrant is used.
  0100                72     IBPSTACKTOP     EQU     0FFH+1  ; set top of stack to highest location+1.
                      73     ;
                      74     ;  Stack Space for reentrant functions in the LARGE model.      
  0000                75     XBPSTACK        EQU     0       ; set to 1 if large reentrant is used.
  0000                76     XBPSTACKTOP     EQU     0FFFFH+1; set top of stack to highest location+1.
                      77     ;
                      78     ;  Stack Space for reentrant functions in the COMPACT model.    
  0000                79     PBPSTACK        EQU     0       ; set to 1 if compact reentrant is used.
  0000                80     PBPSTACKTOP     EQU     0FFFFH+1; set top of stack to highest location+1.
                      81     ;
                      82     ;------------------------------------------------------------------------------
                      83     ;
                      84     ;  Page Definition for Using the Compact Model with 64 KByte xdata RAM
                      85     ;
                      86     ;  The following EQU statements define the xdata page used for pdata
                      87     ;  variables. The EQU PPAGE must conform with the PPAGE control used
                      88     ;  in the linker invocation.
                      89     ;
  0000                90     PPAGEENABLE     EQU     0       ; set to 1 if pdata object are used.
                      91     ;
  0000                92     PPAGE           EQU     0       ; define PPAGE number.
                      93     ;
  00A0                94     PPAGE_SFR       DATA    0A0H    ; SFR that supplies uppermost address byte
                      95     ;               (most 8051 variants use P2 as uppermost address byte)
                      96     ;
                      97     ;------------------------------------------------------------------------------
                      98     
                      99     ; Standard SFR Symbols 
  00E0               100     ACC     DATA    0E0H
  00F0               101     B       DATA    0F0H
  0081               102     SP      DATA    81H
  0082               103     DPL     DATA    82H
  0083               104     DPH     DATA    83H
  00AE               105     WDKEY   DATA    0AEH
  0095               106     ASCL    DATA    095H
  00B1               107     PSCL0L  DATA    0B1H
  00B2               108     PSCL0H  DATA    0B2H
  00B3               109     PSCL1L  DATA    0B3H
  00B4               110     PSCL1H  DATA    0B4H
  00E1               111     USCL    DATA    0E1H
  00D7               112     DDCCON  DATA    0D7H
  00D8               113     S1CON   DATA    0D8H
                     114     
                     115                     NAME    ?C_STARTUP
                     116     
                     117     
                     118     ?C_C51STARTUP   SEGMENT   CODE
                     119     ?STACK          SEGMENT   IDATA
                     120     
----                 121                     RSEG    ?STACK
0000                 122                     DS      1
                     123     
                     124                     EXTRN CODE (?C_START)