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Problems to execute code

Michael Bigler

Hello

I'm trying to use my microcontroler-
system with the Keil-Software.

The sytem have got the following
prefereces:
- SAB 80c535
- 32k RAM
- 32k ROM
-Memory-architekture:
(external memory)

  CODE          XDATA
--------     ---------  FFFFh
|      |     |       |
| RAM  |     | RAM   |
| 32kb |     | 32kb  |
|      |     |       |
--------     ---------  8000h
|      |     |       |  7FFFh
| ROM  |     |       |
| 32kb |     ---------
|      |     | LCD   |  0001h
|      |     |       |
--------     ---------  0000h
(The RAM is physically alwayas the
same in CODE and XDATA)

In my opinion this is a von Neumann
architekture.

Facts:
The monitor (mon51) runs properly. I
can communicate with the system.
The debbugger also communicates with the
system. But something with the code
download doesn't work. dScope (DK51)
reports Error 22.
When I try it with the uV2 debugger, the
code seems to be downloaded (statusbar of
downloading counts up to 100%), but I can't
Execute them (but no errors are reported).0

In the target-options I configured that
"Off-chip-code memory" starts at 0000h and
"Off-chip XDATA memory" starts at 8000h.
This Values I used also to generate the
monitor file for de EPPROM.

Ok.. I hope that somebody have got a solution
for my problem...

Yours cincerly
Michael Bigler

Parents
  • 0

    Nice memory layout illustration! I've made a modification

      CODE          XDATA
----------------------  FFFFh
|                    |
| RAM                |  Access using PSEN or RD to read
| 32kb               |  Access using WR to write
|                    |
----------------------  8000h
|      |     |       |  7FFFh
| ROM  |     |       |
| 32kb |     ---------
|      |     | LCD   |  0001h
|      |     |       |
--------     ---------  0000h

    Configuring the Monitor

    With this memory map, you should configure the monitor as follows:

    Near the top of INSTALL.A51, you will find the following code: 

    INT_ADR_OFF EQU 8000H   ; INTERRUPT VECTOR OFFSET IF MONITOR
                        ; IS INSTALLED AT ADDRESS 0000H
DEF_PC_VAL  EQU 8000H   ; DEFAULT PC VALUE AFTER START UP
    These values should be changed to 8000h as shown above.

    When you run the install program:

    * XDATASTART should be at FF
    * CODESTART should be at 00

    The install command line will be:

    INSTALL ?? FF 00
    Refer to the following knowledgebase entry for more details:

    http://www.keil.com/support/docs/1221.htm


    Creating Programs to Debug with MON51

    When you create a program to download to the monitor in this configuration, you MUST relocate the program to start at 8000h. If you use XDATA (RAM) you must also configure the start of XDATA so that when you write to it, you don't overwrite your program.

    Refer to the following knowledgebase entry to set the program start address:

    http://www.keil.com/support/docs/189.htm


    Downloading Programs with the Debugger

    If everything was configured properly (the monitor and your program), the debugger downloads your program with NO errors. If you receive error 22, that USUALLY means that the monitor is not properly configured. Refer to the following knowledgebase entry for more details about how to check and solve that problem:

    http://www.keil.com/support/docs/863.htm

    Once you program is downloaded, you MAY need to type the following in the command window:

    $=0x8000
    This sets the program counter to 8000h.

    Once that's done, you are ready to begin testing your program.

    Keil Support

Reply
  • 0

    Nice memory layout illustration! I've made a modification

      CODE          XDATA
----------------------  FFFFh
|                    |
| RAM                |  Access using PSEN or RD to read
| 32kb               |  Access using WR to write
|                    |
----------------------  8000h
|      |     |       |  7FFFh
| ROM  |     |       |
| 32kb |     ---------
|      |     | LCD   |  0001h
|      |     |       |
--------     ---------  0000h

    Configuring the Monitor

    With this memory map, you should configure the monitor as follows:

    Near the top of INSTALL.A51, you will find the following code: 

    INT_ADR_OFF EQU 8000H   ; INTERRUPT VECTOR OFFSET IF MONITOR
                        ; IS INSTALLED AT ADDRESS 0000H
DEF_PC_VAL  EQU 8000H   ; DEFAULT PC VALUE AFTER START UP
    These values should be changed to 8000h as shown above.

    When you run the install program:

    * XDATASTART should be at FF
    * CODESTART should be at 00

    The install command line will be:

    INSTALL ?? FF 00
    Refer to the following knowledgebase entry for more details:

    http://www.keil.com/support/docs/1221.htm


    Creating Programs to Debug with MON51

    When you create a program to download to the monitor in this configuration, you MUST relocate the program to start at 8000h. If you use XDATA (RAM) you must also configure the start of XDATA so that when you write to it, you don't overwrite your program.

    Refer to the following knowledgebase entry to set the program start address:

    http://www.keil.com/support/docs/189.htm


    Downloading Programs with the Debugger

    If everything was configured properly (the monitor and your program), the debugger downloads your program with NO errors. If you receive error 22, that USUALLY means that the monitor is not properly configured. Refer to the following knowledgebase entry for more details about how to check and solve that problem:

    http://www.keil.com/support/docs/863.htm

    Once you program is downloaded, you MAY need to type the following in the command window:

    $=0x8000
    This sets the program counter to 8000h.

    Once that's done, you are ready to begin testing your program.

    Keil Support

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