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## -------------------------------------------
## This file is part of eCos, the Embedded Configurable Operating System.
## Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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27 Oct 1999, revised on 2000.01.28

How to build and install the GDB module on the PID

Make GDB module
~~~~~~~~~~~~~~~
Configure and build using the 'stubs' template for the PID
target. These are the necessary CLI instructions. It can also be done
from the Configtool by selecting the appropriate templates.

 % cd /tmp
 % mkdir stubs
 % cd stubs
 % ecosconfig new pid stubs
 % ecosconfig tree
 % make

This will install some files in ./install/bin:

 cygmon.elf:   The built stubs image
 cygmon.bin:   The image converted to binary (suitable for burning to ROM)
 cygmon.img:   The relocated ELF image (suitable for FLASH writing, see below)


Make FLASH tool
~~~~~~~~~~~~~~~

Again, these are the necessary CLI instructions. It can also be done
from the Configtool by selecting the appropriate templates, and
enabling the option.

 % cd /tmp
 % mkdir pid-flash
 % cd pid-flash
 % ecosconfig new pid
 % <edit ecos.ecc, enabling the CYGBLD_BUILD_FLASH_TOOL option:>
      --- ecos.ecc.orig       Fri Jan 28 11:21:43 2000
      +++ ecos.ecc            Fri Jan 28 11:22:01 2000
      @@ -150,7 +150,7 @@
       cdl_option CYGBLD_BUILD_FLASH_TOOL {
           # Flavor: bool
           # No user value, uncomment the following line to provide one.
      -    # user_value 0
      +    user_value 1
           # value_source default
           # Default value: 0
           # Requires:  CYG_HAL_STARTUP == "RAM" 
 % ecosconfig resolve
 % ecosconfig tree
 % make

The flash tool is installed in ./install/bin


Prepare board for eCos
~~~~~~~~~~~~~~~~~~~~~~
 1. Set jumper 7-8 on LK6   [using the Angle code in the 16 bit EPROM]
 2. Set jumper 5-6 on LK6   [select 8bit ROM mode]
 3. Set jumper LK18         [ROM remap - this is also required for eCos]
 4. Set S1 to 0-0-1-1       [20MHz operation]


Program FLASH
~~~~~~~~~~~~~
 1. Download the image onto the PID board:
      % cd /tmp
      % arm-elf-gdb -nw stubs/install/bin/gdb_image.img

        (gdb) target rdi s=<serial device>
        Angel Debug Monitor V1.04 (Advanced RISC Machines SDT 2.11a) for PID
        Built with Serial(x1), Parallel, DCC
        Rebuilt on Apr  7 1998 at 22:20:43
        Serial Rate:   9600
        Connected to ARM RDI target.
        (gdb) load
        Loading section .rom_vectors, size 0x60 lma 0x60000
        Loading section .text, size 0xeea8 lma 0x60060
        Loading section .rodata, size 0x304c lma 0x6ef08
        Loading section .data, size 0x7f8 lma 0x71f54
        Start address 0x60060 , load size 75596
        Transfer rate: 5548 bits/sec.
        (gdb) quit

   This will download the stubs onto the board at 0x60000..0x80000

   Use /dev/ttyS0, COM1 or similar for the <serial device> name.

 2. Now download the FLASH programmer tool
      % arm-elf-gdb -nw pid-flash/install/bin/prog_flash.img

        (gdb) target rdi s=<serial device>
        Angel Debug Monitor V1.04 (Advanced RISC Machines SDT 2.11a) for PID
        Built with Serial(x1), Parallel, DCC
        Rebuilt on Apr  7 1998 at 22:20:43
        Serial Rate:   9600
        Connected to ARM RDI target.
        (gdb) load
        Loading section .rom_vectors, size 0x60 lma 0x4000
        Loading section .text, size 0x4964 lma 0x4060
        Loading section .rodata, size 0x384 lma 0x89c4
        Loading section .data, size 0x28c lma 0x8d48
        Start address 0x4060 , load size 20436
        Transfer rate: 5449 bits/sec.
        (gdb) cont

 3. The FLASH tool will output some text on the board serial port B at
    38400 baud:

       ARM eCos
       FLASH here!
       manuf: 8, device: 40
       Error: Wrong Manufaturer: 08
       ... Please change FLASH jumper

 4. This text is repeated until you remove the jumper 7-8 on LK6. Then
    the output should be:

       manuf: 1F, device: A4
       AT29C040A recognised
       About to program FLASH using data at 60000..80000
       *** Press RESET now to abort!
    
 5. You have about 10 seconds to abort the operation by pressing
    reset. After this timeout, the FLASH programming happens:
  
      ...Programming FLASH
      All done!

 6. Quit/kill the GDB process which will hang.

 7. Next time you reset the board, the stub will be in control, communicating
    on serial port A at 38400 baud. See documentation for further details
    on how to connect with GDB.



Big-Endian operation
~~~~~~~~~~~~~~~~~~~~

  1) If the board is to be used in big-endian mode, the stub should be
     configured for platform 'pidbe' instead of 'pid'.

 2a) If a big-endian rom controller is installed on the board, the
     programming of a new stub into flash is covered in the ARM PID
     manual.

 2b) If a big-endian rom controller is _not_ used, this is what you
     must do:

       1) Follow the above instructions (including jumper settings) ,
          but instead of building and using the 'prog_flash' FLASH
          tool, use the 'prog_flash_BE_image_LE_system' FLASH tool
          (build it by enabling CYGBLD_BUILD_FLASH_TOOL_BE)

       2) Instead of resetting the board after the FLASH has been
          programmed, switch off the power and enable jumper LK4.

     If you have to re-program the FLASH later, you can follow the
     steps above again, but also disable jumper LK4 when changing the
     other jumpers.