OpenGD77

Thank you so much! I downloaded everything today and built it and it seems to work fine. I also extracted the codec binary section from an MCU dump in case I need to use the JLink for debugging. I'm currently cleaning the code, removing unused functions, etc. and trying to investigate a couple minor...

1. DCDM is unncessary for ham radio, as it is a feature to allow 2 simplex radios on the same frequency on different TimeSlots, with or without a master reference base station for synchronisation. This function is used by commercial operators becuase they pay per channel, and it is cheaper if they ...

VK3KYY wrote: ↑

Wed Mar 08, 2023 10:25 am

supporting the DM-1701 and also processing bug fixes for the DCDM Rx and the DTMF + CTCSS (from Colin) took higher priority

That’s totally understandable.

I didn’t know DCDM was supported. Is it only on Rx? Will it be supported on Tx eventually?

Just flashed it in my MD-UV390 and everything seems to work just fine. Thank you so much! Hopefully this Beta can become the first Stable release if no bugs are found. That's great news! Can't wait to check it out. I suppose the IDE you're using for this version is SW4STM32 instead of MCUXpresso, ri...

Can you read / understand / modify the MK22 linker files Hi! Sorry, I haven't checked the forum in a couple days. I wish I could help but I don't know much about linker files, I only changed the ROM start addresses by substracting 0x4000 addresses so the code starts at the beggining of the ROM if I...

I don't see any point in buying these radios, they are not cheap, and they don't have a screen or keyboard. RT3S / UV380 is still available at the moment and hopefully will now continue to be available now that TYT is using a Chinese made STM32F4 chip instead of the genuine chip. Probably the Chine...

But there must be some difference in timing, and not the speed which is causing the problem Yeah, maybe at the start the code is executed quicker and that's why the for loops have to be longer there... I don't know. BTW, I just contacted TYT and this radio is still in production (or they are gonna ...

BTW I'm not doing this on the RT50, I'm doing it in the DM1801 using the lastest release and only changing the native SPI0 communication to a bit-bang system. My goal now is getting a version of the firmware for the DM-1801 that works exactly the same as the release, but with SPI0 using bit-bang (an...

Basically, I just used the unmodified released code, changed the C6000 SPI U port declarations (as GPIO pins instead of SPI0) and modified spi.c so SPI0 uses a bit-bang system and SPI1 stays unmodified (in the RT50, SPI1 is connected to the same pins as the DM-1801, but SPI0 is connected to random G...

So a couple days ago I received the logic analyser and today I've had a chance to try it. Turns out my delays were way too long. I've made improvements but still couldn't make it work, I still need to adjust and test more things. I found out several curious things. First of all, I've had to use much...