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Radioddity GD-77 Death Now alive again
Posted: Sun Nov 14, 2021 7:16 pm
by CT2HOM
Thanks very much Jason Reilly VK7zja without you help my GD 77 was already deep in the atlantic waters.
thanks again for everything you have done
73's my Friend and all best to you
Re: Radioddity GD-77 Death Now alive again
Posted: Sun Nov 14, 2021 8:05 pm
by YT5HOK
So, you are the one polluting Atlantic ocean...?
J/K.
Good to hear you got it fixed.
Re: Radioddity GD-77 Death Now alive again
Posted: Sun Jun 19, 2022 5:08 pm
by ON3GIN
I have the same problem.
When I press side key 1 and side key 2 the green LED flashes and nothing appears on the LCD screen.
Please your expert help.
73's ON3GIN
Re: Radioddity GD-77 Death Now alive again
Posted: Mon Jun 20, 2022 4:58 am
by VK3KYY
ON3GIN wrote: ↑Sun Jun 19, 2022 5:08 pm
I have the same problem.
When I press side key 1 and side key 2 the green LED flashes and nothing appears on the LCD screen.
Please your expert help.
73's ON3GIN
Probably the copy protection data in your radio has been erased by the official firmware.
The only solution is to use a hardware dongle programmer connected directly to your radio PCB, to erase the CPU and then install a patched bootloader which does not check the copy protection data
Re: Radioddity GD-77 Death Now alive again
Posted: Sat Nov 18, 2023 8:19 pm
by VA6GSB
Hi, does anyone know how to get a hardware dongle programmer for a GD77 or make 1.
Thank you
73 VA6GSB
Re: Radioddity GD-77 Death Now alive again
Posted: Sat Nov 18, 2023 8:58 pm
by VK3KYY
VA6GSB wrote: ↑Sat Nov 18, 2023 8:19 pm
Hi, does anyone know how to get a hardware dongle programmer for a GD77 or make 1.
Thank you
73 VA6GSB
If want to erase and reflash the MCU, you'll need something like a JLink, or anything else that can flash a NXP / Freescale MK22FN512 device.
When you say "make 1" what do you mean. What is your level of MCU knowledge. i.e it is possible to "make" a programer dongle using a generic STM32F103 board, which you can buy for $5, but you have to flash that board using a USB to serial adaptor, with some legacy firmware from github and solder some wires to it
Re: Radioddity GD-77 Death Now alive again
Posted: Sat Nov 18, 2023 9:30 pm
by VA6GSB
Hi VK3KYY, Thank you coming back to me, no MCU knowledge. Looking up prices for JLink on amazon.ca
Re: Radioddity GD-77 Death Now alive again
Posted: Sat Nov 18, 2023 9:34 pm
by VK3KYY
VA6GSB wrote: ↑Sat Nov 18, 2023 9:30 pm
Hi VK3KYY, Thank you coming back to me, no MCU knowledge. Looking up prices for JLink on amazon.ca
Most of the JLink clones work OK.
e.g.
https://www.amazon.ca/GamlReid-Interfac ... B0C1N5XK6P
On Amazon.ca will actually be a clone.
Ones like this
https://www.amazon.ca/J-Link-Debugger-D ... B0C1K31CN6 don't work because the Reset signal is not broken out to the connector.
The real JLink dongles cost well over $500
The cheapest fully official / legal version is the JLink Edu Mini. Which Adafruit sell
https://www.adafruit.com/product/3571
Re: Radioddity GD-77 Death Now alive again
Posted: Sat Nov 18, 2023 9:38 pm
by VA6GSB
Thanks, I get the one you posted, and I agree the real one about $500.
Thanks again.
VA6GSB
Re: Radioddity GD-77 Death Now alive again
Posted: Sat Nov 18, 2023 9:39 pm
by VK3KYY
VA6GSB wrote: ↑Sat Nov 18, 2023 9:38 pm
Thanks, I get the one you posted, and I agree the real one about $500.
Thanks again.
VA6GSB
FYI.
The cheapest fully official / legal version is the JLink Edu Mini. Which Adafruit sell
https://www.adafruit.com/product/3571
BTW.
The problem with the clones, is that JLink started to blacklist the serial numbers used in the cloned firmware, however if the clone you buy from Amazon doesn't work, you could send it back.
I have various clones and also the JLink Edu Mini
But, most of the time I actually use a JLink I made by modifying a $5 STM32 board, I bought from AliExpress
https://www.aliexpress.com/item/1005004530565313.html