startu32.lst

USB IAP (In Application Programming) Demo for uPSD32

A51 MACRO ASSEMBLER  STARTU32                                                             04/30/2004 12:57:59 PAGE     1


MACRO ASSEMBLER A51 V7.09
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:  This code is executed after processor reset.
                       4     ;    
                       5     ;  Modified for uPSD Startup:
                       6     ;     - Disable Watchdog timer - enable at beginning of user application
                       7     ;     - Settup various IP prescalers to large values (lowers power requirements)
                       8     ;       The IP device drivers wil need to initialize the prescaler to the right value
                       9     ;
                      10     ; April 30, 2004 - added disclaimer.
                      11     ;
                      12     ; Nov 2003 - Petr PFEIFER, updated
                      13     ;
                      14     ; Copyright (c) 2004 STMicroelectronics Inc.
                      15     ;
                      16     ; This example demo code is provided as is and has no warranty,
                      17     ; implied or otherwise.  You are free to use/modify any of the provided
                      18     ; code at your own risk in your applications with the expressed limitation
                      19     ; of liability (see below) so long as your product using the code contains
                      20     ; at least one uPSD product (device).
                      21     ; 
                      22     ; LIMITATION OF LIABILITY:   NEITHER STMicroelectronics NOR ITS VENDORS OR 
                      23     ; AGENTS SHALL BE LIABLE FOR ANY LOSS OF PROFITS, LOSS OF USE, LOSS OF DATA,
                      24     ; INTERRUPTION OF BUSINESS, NOR FOR INDIRECT, SPECIAL, INCIDENTAL OR
                      25     ; CONSEQUENTIAL DAMAGES OF ANY KIND WHETHER UNDER THIS AGREEMENT OR
                      26     ; OTHERWISE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
                      27     ; 
                      28     ;------------------------------------------------------------------------------
                      29     
                      30     
                      31     ;  User-defined Power-On Initialization of Memory (Clear Memory)
                      32     ;
                      33     ;  With the following EQU statements the initialization of memory
                      34     ;  at processor reset can be defined:
                      35     
                      36     ;               ; the absolute start-address of IDATA memory is always 0
  0100                37     IDATALEN        EQU     100H    ; the length of IDATA memory in bytes.
                      38     
                      39     ; *** NOTE: uPSD users need to fill in the following based on where SRAM memory mapped.
                      40     
  0000                41     XDATASTART      EQU     0H      ; the absolute start-address of XDATA memory
  0000                42     XDATALEN        EQU     0H      ; the length of XDATA memory in bytes.
                      43     
  0000                44     PDATASTART      EQU     0H      ; the absolute start-address of PDATA memory
  0000                45     PDATALEN        EQU     0H      ; the length of PDATA memory in bytes.
                      46     
                      47     ;  Notes:  The IDATA space overlaps physically the DATA and BIT areas of the
                      48     ;          8051 CPU. At minimum the memory space occupied from the C51 
                      49     ;          run-time routines must be set to zero.
                      50     
                      51     
                      52     ;------------------------------------------------------------------------------
                      53     ;
                      54     ;  Reentrant Stack Initilization
                      55     ;
                      56     ;  The following EQU statements define the stack pointer for reentrant
                      57     ;  functions and initialized it:
                      58     ;
A51 MACRO ASSEMBLER  STARTU32                                                             04/30/2004 12:57:59 PAGE     2

                      59     ;  Stack Space for reentrant functions in the SMALL model.
  0000                60     IBPSTACK        EQU     0       ; set to 1 if small reentrant is used.
  0100                61     IBPSTACKTOP     EQU     0FFH+1  ; set top of stack to highest location+1.
                      62     ;
                      63     ;  Stack Space for reentrant functions in the LARGE model.      
  0000                64     XBPSTACK        EQU     0       ; set to 1 if large reentrant is used.
  0000                65     XBPSTACKTOP     EQU     0FFFFH+1; set top of stack to highest location+1.
                      66     ;
                      67     ;  Stack Space for reentrant functions in the COMPACT model.    
  0000                68     PBPSTACK        EQU     0       ; set to 1 if compact reentrant is used.
  0000                69     PBPSTACKTOP     EQU     0FFFFH+1; set top of stack to highest location+1.
                      70     ;
                      71     ;------------------------------------------------------------------------------
                      72     ;
                      73     ;  Page Definition for Using the Compact Model with 64 KByte xdata RAM
                      74     ;
                      75     ;  The following EQU statements define the xdata page used for pdata
                      76     ;  variables. The EQU PPAGE must conform with the PPAGE control used
                      77     ;  in the linker invocation.
                      78     ;
  0000                79     PPAGEENABLE     EQU     0       ; set to 1 if pdata object are used.
                      80     ;
  0000                81     PPAGE           EQU     0       ; define PPAGE number.
                      82     ;
  00A0                83     PPAGE_SFR       DATA    0A0H    ; SFR that supplies uppermost address byte
                      84     ;               (most 8051 variants use P2 as uppermost address byte)
                      85     ;
                      86     ;------------------------------------------------------------------------------
                      87     
                      88     ; Standard SFR Symbols 
  00E0                89     ACC     DATA    0E0H
  00F0                90     B       DATA    0F0H
  0081                91     SP      DATA    81H
  0082                92     DPL     DATA    82H
  0083                93     DPH     DATA    83H
  00A8                94     EA      DATA    0A8H
  00AE                95     WDKEY   DATA    0AEH
  0095                96     ASCL    DATA    095H
  00B1                97     PSCL0L  DATA    0B1H
  00B2                98     PSCL0H  DATA    0B2H
  00B3                99     PSCL1L  DATA    0B3H
  00B4               100     PSCL1H  DATA    0B4H
  00E1               101     USCL    DATA    0E1H
  00E9               102     UIEN    DATA    0E9H
  00EE               103     UADR    DATA    0EEH
  00D7               104     DDCCON  DATA    0D7H
  00D8               105     S1CON   DATA    0D8H
                     106     
  00D0               107     PSW     DATA    0D0H
                     108     
                     109                     NAME    ?C_STARTUP
                     110     
                     111     
                     112     ?C_C51STARTUP   SEGMENT   CODE
                     113     ?STACK          SEGMENT   IDATA
                     114     
----                 115                     RSEG    ?STACK
0000                 116                     DS      1
                     117     
                     118                     EXTRN CODE (?C_START)
                     119                     PUBLIC  ?C_STARTUP
                     120     
----                 121                     CSEG    AT      0
0000 020000   F      122     ?C_STARTUP:     LJMP    STARTUP1
                     123     
----                 124                     RSEG    ?C_C51STARTUP
A51 MACRO ASSEMBLER  STARTU32                                                             04/30/2004 12:57:59 PAGE     3

                     125     
0000                 126     STARTUP1: