bootloader hex2bin converstion of line type 4

[treitmey]

I am makeing a boot loader of types.
I am hiting a line type 4. extened LBA the address comes out to a
big 0x00300026 which is way biger than the 32K I can program.
AND
hex2bin is producing a big(padded with zeros) file.


Is someone one messing with the intel spec?
How should I interpret this line type 4?

[PCM programmer]

Post the part of the HEX file that contains that line, and a few lines
before it. Also post your PIC type.

[treitmey]

18F452 @40MhZ pcwh 3.239
This is from the very end of the hex file.
ps: I used the #fill_rom 0xFFFF, note the FF's

[Ttelmah]

The configuration fuses are stored at address 0x300000.

Best Wishes

[treitmey]

Thanks. Figured that was it. ((from deductive reasoning))

I can't write_program_memory() for that line? can I.

Don't I need the high volt of ICSP to program them?

[PCM programmer]

But I wanted to show how to find the answer.
Oh well, I'll post it anyway:
----------------------------------
Keil has a nice explanation of the Hex file format.
Here's the page about extended records:
http://www.keil.com/support/man/docs/oh166/oh166_ih_extrec.htm
So that means the high word is 0x0030, as shown in bold:
020000040030CA

The next line in the Hex file is a data record, with address = 0x0000.
:0E0000000026020E000181000FC000E00F403C
http://www.keil.com/support/man/docs/oh166/oh166_ih_record.htm

So that means the full address for that line is 0x00300000.


Then go to the 18F452 page on the Microchip site:
http://www.microchip.com/stellent/idcplgidcplg?IdcService=SS_GET_PAGE&nodeId=1335&dDocName=en010296
Then download the Programming spec:
http://ww1.microchip.com/downloads/en/DeviceDoc/39576b.pdf
Then go to page 4 and it shows that the Config words start at 300000h.
So that line holds the CCS #fuses settings.

[Ttelmah]

Ongoing, it is up to you what you do with them.
There is a 'write_configuration_memory' function. It is internally identical to the write_program_memory function, except the addresses it actually writes start at the required address. You can write these bits without high voltage programming, _but_ the bits in the 'code protection' area, can only be _cleared_ by a high voltage erase.
Generally, for many bootloaders, you would not want these bits to be changeable, so you just ignore data in this area.

Best Wishes

[treitmey]

Thanks so very, very much.