Search found 5256 matches

by VK3KYY
Sat Jan 28, 2023 10:05 pm
Forum: TYT MD-UV380 / UV390 / Retevis RT-3S
Topic: Newbie Assistance - OpenGD77 Firmware Installation
Replies: 5
Views: 88

Re: Newbie Assistance - OpenGD77 Firmware Installation

Many thanks from western Canada. Patrick - VE7PJG No worries. See my other posts, but it looks like this is a cost saving exercise by the manufacturer, as the original STM32F405VGT CPU is still in production and available in China (listed on AliExpress) Hopefully they will notice a drop in sales an...
by VK3KYY
Sat Jan 28, 2023 9:58 pm
Forum: TYT MD-UV380 / UV390 / Retevis RT-3S
Topic: IMPORTANT. New MD-UV380 or RT3S are not compatible
Replies: 26
Views: 1180

Re: IMPORTANT. New MD-UV380 or RT3S are not compatible

I checked and STM32F405VTG CPUs are still available in China e.g. https://www.aliexpress.com/item/1005004137675365.html So this is just a cost saving exercise by TYT. Perhaps someone needs to tell them, that the reason they are selling a lot of UV380 / RT3S is that people want to run OpenGD77 on the...
by VK3KYY
Sat Jan 28, 2023 9:34 pm
Forum: TYT MD-UV380 / UV390 / Retevis RT-3S
Topic: Newbie Assistance - OpenGD77 Firmware Installation
Replies: 5
Views: 88

Re: Newbie Assistance - OpenGD77 Firmware Installation

That is unfortunate. Can I assume the best route would be to wait for a GD77 when they beome available? Or shop for an older used RT3S? Thank you, Patrick VE7PJG GD77's are not currently in production, because the CPU chip in that radio in unobtainable It looks like the same problem with CPU chips,...
by VK3KYY
Sat Jan 28, 2023 9:30 pm
Forum: TYT MD-UV380 / UV390 / Retevis RT-3S
Topic: IMPORTANT. New MD-UV380 or RT3S are not compatible
Replies: 26
Views: 1180

Re: IMPORTANT. New MD-UV380 or RT3S are not compatible

one thing that bug me about all this is that i can load openrtx on it , and it will run it.. what is the missing part of code to have it supported by opengd77? thx to everyone who is contributing to this endeavor OpenRTX do not use the official STM hardware code libraries (HAL) or FreeRTOS etc The ...
by VK3KYY
Sat Jan 28, 2023 8:16 pm
Forum: TYT MD-UV380 / UV390 / Retevis RT-3S
Topic: Display backlight brightness (factory fw)
Replies: 2
Views: 229

Re: Display backlight brightness (factory fw)

See the other threads about new RT3S

If your radio has the unmarked Chinese CPU chip, it will not run the firmware

Only radios with the real STM32F405 are currently compatible
by VK3KYY
Sat Jan 28, 2023 8:13 pm
Forum: TYT MD-UV380 / UV390 / Retevis RT-3S
Topic: Newbie Assistance - OpenGD77 Firmware Installation
Replies: 5
Views: 88

Re: Newbie Assistance - OpenGD77 Firmware Installation

See the thread about new RT3S

The manufacturer changed the CPU chip for an unmarked Chinese clone, and the firmware will not run on the clone chip, it only runs on the real CPU manufactured by STM
by VK3KYY
Sat Jan 28, 2023 8:10 pm
Forum: TYT MD-UV380 / UV390 / Retevis RT-3S
Topic: IMPORTANT. New MD-UV380 or RT3S are not compatible
Replies: 26
Views: 1180

Re: IMPORTANT. New MD-UV380 or RT3S are not compatible

If the CPU chip has no markings, the firmware will not work, because the chip is not a real STM32F405
by VK3KYY
Sat Jan 28, 2023 7:29 am
Forum: TYT MD-UV380 / UV390 / Retevis RT-3S
Topic: RT3S firmware won't run
Replies: 56
Views: 1798

Re: RT3S firmware won't run

MacLEOD wrote:
Sat Jan 28, 2023 7:25 am
That is, the firmware will not work with my radio?
Not if the REV is 9
by VK3KYY
Sat Jan 28, 2023 7:22 am
Forum: TYT MD-UV380 / UV390 / Retevis RT-3S
Topic: RT3S firmware won't run
Replies: 56
Views: 1798

Re: RT3S firmware won't run

Yes. But it probably shows Rev:9

So its a fake CPU

This is just a test application its not the firmware

I just added some more hard coded delays to make the display data transfer work