OpenGD77

TYT replaced the STM32F405VTG CPU in radios manfactured at the end of 2022 with an unbranded clone IC

This clone CPU did not work with the firmware

After a lot of work by Colin and myself, with the help of VE2NCK for testing, we have identified the problem with the clone chip.

The problem is that it only supports different interrupt 8 Interrupt priorities, instead of 16 in the genuine CPU.

The reason the firmware would not even boot up, was because we use FreeRTOS as the operating system in the firmware and it checks that the CPU provides 16 levels of interrupt priority


To cut a long story short, we were able to change the firmware, so that it only uses 8 levels of interrupt priority, this included modifying FreeRTOS

Technically the changes are a hack, because the interrupt priority numbers we use are still 0 to 15, as the range could not be changed, however as the least significant bit of the interrupt priority register is missing in the clone CPU, we could not use adjacent priority numbers which would map to the same priority on the clone CPU

The result however is that we were able to create one firmware binary that will work with both the genuine and clone/fake CPU

Currently we have only published this new version for testing and have not put it into the Latest firmware folder.

The latest files can be downloaded from here

downloads/MDUV380/Firmware/5ed1bcc0433f ... ed6ab7e7f/

Note. We have not tested the Japanese (JA) version

You are the best!
Good team

Good health to you all

73s

Yes, and so Far Seems to be working Well. I congratulate the efforts going into this Firmware and making it happen and get working, thought we may have had no hope with the Fake Clone CPU. So after Flashing the New Firmware this morning so far been happy with, but still need more testing and from others with a be Non Genuine CPU Clone with the latest Serial Numbers.

Well Done

Well done to all,
I will be trying it later and will post my results.

works correctly even on my old model radio ... you are fantastic !!! Thank you
Ciao
Sal

Ik0nwg wrote: ↑

Mon Feb 20, 2023 7:02 am

works correctly even on my old model radio ... you are fantastic !!! Thank you
Ciao
Sal

Initially we thought it may be necessary to have 2 different versions of firmware, but we were able to eventually design a solution which would work with both the genuine and non-genuine CPU.

I will eventually release this new version as the "Latest" after it has some more testing on both old and new radios.

VK3KYY wrote: ↑

Mon Feb 20, 2023 10:01 am

Ik0nwg wrote: ↑

Mon Feb 20, 2023 7:02 am

works correctly even on my old model radio ... you are fantastic !!! Thank you
Ciao
Sal

Initially we thought it may be necessary to have 2 different versions of firmware, but we were able to eventually design a solution which would work with both the genuine and non-genuine CPU.

I will eventually release this new version as the "Latest" after it has some more testing on both old and new radios.

Excellent work! as always! Thanks Roger and thanks Colin
Ciao

old RT3S SN2104...
- firmware works
- QuickKey bug has been solved (Thanks!)

73's de OE1MWW
Wolfgang

Following on from my previous post installing the new software on a new cloned cpu radio.

All looks very good, Only two small bugs that stand out so far.

The DTMF auto dialer sticks on the first tone, the tx on timing is ok.

The power levels, when I first installed the software the power levels on all frequencys were very very low,
The calibrate menu works like a charm, and all is now working how it should be.

G7JIQ wrote: ↑

Mon Feb 20, 2023 9:47 pm

Following on from my previous post installing the new software on a new cloned cpu radio.

All looks very good, Only two small bugs that stand out so far.

The DTMF auto dialer sticks on the first tone, the tx on timing is ok.

The power levels, when I first installed the software the power levels on all frequencys were very very low,
The calibrate menu works like a charm, and all is now working how it should be.

Do you have a radio with the fake CPU in it ?

DTMF auto dialer works OK for me with a genuine CPU. It seems unlikely that the CPU would be affacting this if everything else is working.

Power levels on virually all of these Chinese radios can be wildly inaccure. I don't think they bother to calibrate the power in the factory