[uracoli-devel] flash configuration data

[uracolix]

Hi,

I started implementing Daniels idea, to hold node specific configuration data, 
e.g. as node address, panid, ... in flash memory. 

The data section should be read from a fixed address in the flash memory , 
e.g. at FLASHEND - structure size or just before the boot loader start 
address. 


In order to update the configuration data,  a little python script is added, 
that generates an intel hex file, which is programmed with the -D option of 
avrdude.

The workflow currently is:

1 flash the application (the config section is set to 0xff)
    avrdude -P usb -p m1281 -c jtag2 -U myapp.hex


2 update the config section (w/o erase, e.g. punch zeros in the flash)   
    python Tools/nodecfg2ihex.py -a 1 -p 0x2222 |\
         avrdude -P usb -p m1281 -c jtag2 -D  -U fl:w:-:i


Now a step is needed that avrdude does not erase the entire flash
and leaves the config area untouched.

Cheers Axel