[chirp_devel] Need help with some Baofeng radios

[IZ3GME Marco]

...mmm... another idea: it can be simplier to just compress the 12 byte 
ident down to 8 bytes in the memory map, this avoid changing the memory 
(and file) format.

Just e cent more ;)
73 de IZ3GME Marco

On 01/10/2014 11:53, Jim Unroe wrote:
> Marco,
>
> It isn't just the lengh of the file. Since the "ident" that is returned
> is written to the .img first and the rest of the radio's memory follows
> it, all of the memory is shifted 4 bytes.
>
> So...
>
> #seekto 0x0B08;
> struct {
>    u8 code[5];
>    u8 unused[11];
> } pttid[15];
>
> for a "normal" BaoFeng UV-5R style radio would need to be...
>
> #seekto 0x0B0C;
> struct {
>    u8 code[5];
>    u8 unused[11];
> } pttid[15];
>
> For this "odd" class of UV-6 and UV-8 radios.
>
> I think there is a similar problem when writing to the radio. CHIRP
> currently does this...
>
>      # Main block
>      for i in range(0x08, 0x1808, 0x10):
>          _send_block(radio, i - 0x08, radio.get_mmap()[i:i + 0x10])
>          _do_status(radio, i)
>
> It starts a 0x08 (right after the normal 8 byte "ident"). I think it
> would need to start at 0x0C (right after the 12 byte "ident").
>
> Jim
>
> On Wed, Oct 1, 2014 at 4:52 AM, IZ3GME Marco <iz3gme.marco at gmail.com
> <mailto:iz3gme.marco at gmail.com>> wrote:
>
>     Just a couple of suggestions:
>     - for the communication you can try reading 12 bytes lowering timeout so
>     if only 8 are received read will bail out quickly enough
>     - i would expand the structure to the longer size to have to deal with
>     different sizes only when accessing ident field (i guess ident is only
>     used during clone)
>
>     my two cents
>     73 de IZ3GME Marco
>
>     On 01/10/2014 01:53, Jim Unroe wrote:
>      > Hi all,
>      >
>      > I am working on two issues, #1225 (UV-8) and #1707 (UV-6), that after
>      > doing research seems to indicate both issues are caused by the
>     same thing.
>      >
>      > The problem is that after the "magic" is sent to the radio to
>     initiate
>      > cloaning, the radio returns a 12 byte ident when every other Baofeng
>      > radio that I know of returns an 8 byte ident. I have temporarily
>     edited
>      > the driver to accept 12 bytes and CHIRP downloads from the radio. But
>      > since the ident is 4 bytes longer, all of the structures are off
>     by 4 bytes.
>      >
>      > After saving the downloaded data to a .img file, I can use a hex
>     editor
>      > to remove 4 bytes from the begining of .img file, save it to another
>      > name and load it back into CHIRP and it is fine.
>      >
>      > So I am looking for some help to figure out how to have CHIRP to be
>      > tolerant of the 8 byte and 12 byte idents and also 4byte offset data
>      > structures.
>      >
>      > Got any ideas?
>      >
>      > Thanks,
>      > Jim KC9HI
>
>
>
>
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