Anytone DT-878UV Plus Codeplug error

[WolffyTheReal]

The Radio Anytone AT-D878UV Plus gives an error after writing the codeplug onto the radio if the Firmware is higher than 1.18.
Showing on the display of the radio "Codeplug Error. Please Initialize Firmware".

[neotericpiguy]

I've been looking for a firmware identifier in the device.img and haven't been successful. I have a BTECH 6x2 which shares the same upload and download as the 878.
https://github.com/sergev/dmrconfig/blob/e47491e58b789d47143eb7bca05ef9c906716f4b/d868uv.c#L685-L690
I ran into an issue where the BTECH 6x2 updated to 2.03 and started having "Please Initialize Firmware" error messages. My solution at the point was to spin a bt6x2.c with almost exact same parameters as the d868uv.c but I had to work though little byte alignment caveats to regain compatibility.

[WolffyTheReal]

I will look into that and play a bit with the files. Maybe i get it to work somehow

[hmatuschek]

Starting from this implementation, I reverse-engineered the code-plug further for my own project. It appears to work right now but I have not tested it thoroughly.
The only difference that was obvious to me, is the address for the contact bitmap index map

dmrconfig/d868uv-map.h

Line 323 in 9e65be7

{ 0x02600000, 0x9c40 }, // 076500 - Unknown data, bitmap

More over, the contact index in channel_t is actually a uint32_t little-endian

dmrconfig/d868uv.c

Line 171 in 9e65be7

uint16_t contact_index; // Contact: 0=Contact1, 1=Contact2, ...

This however, should not matter unless you configure a channel without a default contact by setting the index to 0xffffffff. In fact, the radio does not accept the code-plug if a TX contact is "disabled" by writing 0xffffffff to it.

[hexagonal-sun]

@hmatuschek I'm wondering if that's the same issue that I'm seeing. I've just got a new 878 and tried to read the pre-installed code plug which has 1549 TGs programmed in. Anything above 1000 gets corrupted:

  998   31482_S-TEXAS    Group   31482    -
  999   31483_WEST_TEXAS Group   31483    -
 1000   31484_SE-TEXAS   Group   31484    -
 1001   _                Unknown 166666665 Unknown
 1002   _                Unknown 166666665 Unknown
 1003   _                Unknown 166666665 Unknown
 1004   _                Unknown 166666665 Unknown

Then anything above 1311 isn't read:

 1308   _                Unknown 166666665 Unknown
 1309   _                Unknown 166666665 Unknown
 1310   _                Unknown 166666665 Unknown
 1311   _                Unknown 166666665 Unknown
 1312   _                Private 0        -
 1313   _                Private 0        -
 1314   _                Private 0        -
 1315   _                Private 0        -