Bootstrap loader and High Speed Design: Error in the network camera design??

Hello everybody,

I am designing a 73.728Mhz Design based on the network camera design I 
found on the web.
Because of the high speed the bootstraploader first has to copy the 
content of the flash to a fast sram.
The flash of this network camera design is mapped to CE2 (400000h) and 
the corresponding SRAM at CE3 (600000h).
The code they write for this seems to do exactly the opposite: It copies 
the content of  CE3 to CE2 in the range of 400000h to 480000h (please 
look below my comments on the code).

If this correct, then the schematics must be wrong or the other way round.
However, when I want to load the firmware of TINIOS or my own 
application into the TINI, isn"t JAVAKIT expecting to write the data to 
the flash on CE2 (400000h)? It is also the place the TINI400RT should be 
(should it really or is it not important?).

So I my two questions are:
1.) Suppose the case, the schematics are wrong! Could I configure the 
JAVA Kit to load to flash mapped at  CE3?
    And if I can do it, how does the bootstrap loader of the ds80c400 
knows that my code starts at 600000h to start the copying down to CE2?

2.) Suppose the code below is wrong and the schematics is right! I 
change it so that it copies the code from CE2 to CE3 (the other way 
round). Will tini still work there (at CE3, if I jump to it (likein my 
comment  in the last line below))? I don't think so...

So what can I do to make it right. I have a hell of time spent looking 
all the examples, web sites and archives for the TINI, but did not find 
anything like that.
Even I found the DS80C400 Bootstrap loader is not really good explained 
(I only found that it is existing...). Also I did not find the 
documentation of the network design sufficient in terms of how to build 
it and transmit the tinios to the system....
A Documentation of the TINIOS or at Least a description how it exactly 
interacts with the system, I did not find anything sufficient. As soon 
as If I leave the path of javaprogramming, I find myself in a 
jungle....CAN ANYBODY help me, give me a hint, or whatever??

Kind regards from South Africa

Peter Wein
US Stellenbosch
PEG Group


/*---------------------------------------------------------------------------------------------------------------*/
USE_DEFAULT_SPEED  equ 1
DEFAULT_SPEED      equ    61440  /* why this?  = F000h*/
BASE_OFFSET equ 400000h      /* what ?*/
FLASH_OFFSET equ 600000h   /* what?*/

$include (ds80c400.inc)
$include (tinimacro.inc)

org FLASH_OFFSET  /* Program is located in Flash at 6000000h? According 
to the schematics is the flash on CE2, so mapped to 400000h */

sjmp    start
db    "TINI"         /* For what is this? */
db      60h            /* For what is this? */

start:
    mov    dps,#0h                              /* Set the 
datapointerselect register to zero */
    mov    dptr,#copy_data               /* DPTR0 is copydata (starts 
after program) */
    inc    dps                                             /* change to 
DPTR1 */
    mov    dptr,#BASE_OFFSET           /* DPTR1 is  400000h */
    mov    dps,#030h                               /* Set dps to toggle 
between DPTR0 and DPTR1 every Movx instruction, starting with DPTR */
copy_loop:
    movx  a, @dptr  /* GETX */            /* Get 1.databyte from 
copydata *(somwehere 6000xxh) to the acc */
    movx  @dptr, a  /* PUTX */            /* Put data from acc to 400000h */

    movx  a, @dptr  /* GETX */              /* 2.byte */
    movx  @dptr, a  /* PUTX */

    movx  a, @dptr  /* GETX */               /* 3.byte */
    movx  @dptr, a  /* PUTX */

    movx  a, @dptr  /* GETX */               /* 4.byte */
    movx  @dptr, a  /* PUTX */

    movx  a, @dptr  /* GETX */               /* 5.byte */
    movx  @dptr, a  /* PUTX */

    movx  a, @dptr  /* GETX */               /* 6.byte */
    movx  @dptr, a  /* PUTX */

    movx  a, @dptr  /* GETX */               /* 7.byte */
    movx  @dptr, a  /* PUTX */

    movx  a, @dptr  /* GETX */               /* 8.byte */
    movx  @dptr, a  /* PUTX */

    mov    a,dpx                                             /* load 
highest address byte of DPTR  */
    cjne    a,#068h,copy_loop                     /* Is it 68, then stop 
copying */

    ;
    ; Tell the firmware to go at WARP SPEED!!!
    ;
   
    mov    dps,#00h
if (USE_DEFAULT_SPEED=1)
    mov    dptr,#(BASE_OFFSET+7)
    mov    a,#HIGH(DEFAULT_SPEED)
    PUTX
    inc    dptr
    mov    a,#LOW(DEFAULT_SPEED)
    PUTX
endif

    mov    dptr,#(BASE_OFFSET+9)
    mov    a,#4
    PUTX
   
    ;
    ; Wipe the heap
    ;   

    mov    dptr,#0
    mov    dps,#010h
    mov    R0,#01
    clr    a
clear_heap_loop:
    clr    a
    PUTX
    PUTX
    PUTX
    PUTX
    PUTX
    PUTX
    PUTX
    PUTX

    mov    a,dpx
    cjne    a,#01,clear_heap_loop



    ljmp    BASE_OFFSET         /* second case, it must be ljmp 600000h, 
isn't it? */       


copy_data:
END



_______________________________________________
TINI mailing list
TINI-6tN4nzCoH/[email protected]
To UNSUBSCRIBE, edit your profile, or see list archives:
http://lists.dalsemi.com/mailman/listinfo/tini