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https://github.com/larsks/opengd77

Mirror releases from https://www.opengd77.com/downloads/releases/MK22/
https://github.com/larsks/opengd77

amateurradio hamradio opengd77 radio

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Mirror releases from https://www.opengd77.com/downloads/releases/MK22/

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README 

          
# OpenGD77

Firmware for DMR transceivers using the NXP MK22 MCU, AT1846S RF chip and HR-C6000 DMR chipset.  

Including the Radioddiy GD-77 and GD-77S, the TYT MD-760 and TYT MD-730, the Baofeng DM-1801, DM-1801A, DM-860, RD-5R and DM-5R Tier2.



# Project status



The firmware is relatively stable and provides DMR and FM audio transmission and reception, as well as a DMR hotspot mode.  

However it does not support some core functionality that the official firmware supports, including sending and receiving of text / SMS messages



The firmware source code does not contain a AMBE codec required for DMR operation.  

This functionality is provided by the official firmware which is merged with the OpenGD77 by the firmware loader



# User guide



See https://github.com/LibreDMR/OpenGD77_UserGuide



# Credits

Originally conceived by Kai DG4KLU.  

Further development by Roger VK3KYY, latterly assisted by Daniel F1RMB, Alex DL4LEX, Colin G4EML and others.



Current lead developer and source code gatekeeper is Roger VK3KYY



# Copyright



 The firmware is copyright of the OpenGD77 developers. See individual source files for copyright information.



## MCU SDK and API code:   

   Copyright (c) 2015, Freescale Semiconductor, Inc.  

   Copyright 2016-2021 NXP  

   All rights reserved.

   

## FreeRTOS Kernel V10.4.3

   Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  

   All Rights Reserved.



# License



Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions

are met:



1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.



2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer

   in the documentation and/or other materials provided with the distribution.



3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived

   from this software without specific prior written permission.



4. Use of this source code or binary releases for commercial purposes is strictly forbidden. This includes, without limitation,

   incorporation in a commercial product or incorporation into a product or project which allows commercial use.



THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON

ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE

USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.



# Special thanks



Thanks to those who have assisted the project including :



CT1HSN

CT4TX 

DG3GSP

DG4KLU

DJ0HF

DL4LEX

EA3BIL

EA3IGM

EA5SW

EB3AM

EW1ADG

F1CXG

F1RMB

G4ELM

IK0NWG

IU4LEG

IZ2EIB

JE4SMQ

JG1UAA

OH1E

OK2HAD

ON1HK

ON7LDS

OZ1MAX

PU4RON

SQ6SFO

SQ7PTE

TA5AYX

VK3KYY

VK4JWT

VK7JS

VK7ZCR

VK7ZJA

ZL1XE