OpenGD77

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

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

If the CPU chip has no markings, the firmware will not work, because the chip is not a real STM32F405

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

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

Try

downloads/MDUV380/Tests/OpenMDUV380_sho ... rsion2.bin

Ok, I'll waiting for a fixing this problem... Not sure it can be fixed. The CPU may not be compatible with the operating system used by the firmware. Its a totally unmarked CPU that is now in this radio Even if we could get it to work somehow with this CPU. TYT could change to a new CPU next week I...

MacLEOD wrote: ↑

Sat Jan 28, 2023 7:10 am

Does not work.
Colored "snow" on the screen after flashing.

OK. It worked for other people.

Looks like multiple different versions of the new radio

This test firmware should show the CPU device ID and revision and signature https://www.opengd77.com/downloads/MDUV380/Tests/OpenMDUV380_show_CPU_Version.bin The correct values are DEV ID:0x0413 REV:0x1007 SIG:0x0413 The unknown CPU has a revision number of 9, which is not a valid STM CPU revision U...

Just to add to the available data, I received a new Retevis RT3S GPS Serial 2208R03S1100777 with a date label of 08/2022. It was ordered on Amazon and shipped from Retevis Direct. This radio installed the firmware and operates fine. -Rick I suppose anyone buying a RT3S or UV380 from now on, needs t...