[ECOS] EB40a Redboot flash programming issues

[Øyvind Harboe <oyvind dot harboe at zylin dot com>]

I've now gotten my first hello world app(see end) up and running on
my EB40a board, using the instructions I got on the 
mailinglist. 

Q1: why am I having problems programming flash using 
Redboot [ROM], whereas it works fine using Redboot [RAM]?

Q2: Using Redboot [RAM] why am I having problems programming 
to 0x1010000, whereas programming to 0x1020000 works fine? 

Various info:

- Redboot ROM will refuse to program the flash. Various
error messages/hangs, ref. 
http://sources.redhat.com/ml/ecos-discuss/2003-05/msg00365.html
I programmed the Redboot ROM using Wiggler and a special purpose
flash programmer software.

- Redboot RAM will refuse to program at 0x1010000("unknown error"), 
but it works like a charm when I program at 0x1020000.
To program my application, I use Redboot ROM to load Redboot RAM,
which I then use to program my app at 0x1020000.

- The config files list the EB40a FLASH size as being 0x100000,
but AFAIK, it is 0x200000.

This is how I ended up creating my ROM application build environment:

- ecosconfig new eb40a default
- in configtool -> change startup type to ROM
- in configtool -> add two serial port drivers
- ecosconfig tree
- make
- manually edit ROM offset in the two files. I left ram offsets alone, 
as I don't care about Redboot after my app has launched. (At least
not for now, the idea was that I would debug using JTAG Wiggler and 
not need.
install/include/pkgconf/mlt_arm_at91_eb40a_rom.ldi
install/include/pkgconf/mlt_arm_at91_eb40a_rom.h
- make 
- Read install/lib/target.ld, it should have picked up the new addresses
- Rebuild app using the new environment


Øyvind



  /* extract from my hello world app */
  for (;;)
    {
      /* write to serial port */
      err = cyg_io_write( handle, test_string, &len );
      /* all leds on. */
      hal_at91_led_on(0xffffffff);
      /* sleeping implies that threads are running!  */
      cyg_thread_delay(ticks);
      /* all leds off. */
      hal_at91_led_off(0xffffffff);
      cyg_thread_delay(ticks);
   }


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