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Martin Hebnes Pedersen 29c24593f9 Support Rate 1/2 Data CRC Mask 
The previous implementation hardcoded the mask for Rate 3/4 Data (0x01ff),
causing CRC check failure for Rate 1/2 on both encode and decode.

This patch also refactors to avoid code copying and fixes a bug where
calling DataBlock.Byte() on the output of Fragment.DataBlocks() produced
an incorrect CRC value due to Bytes() not resetting db.CRC before
performing it's own CRC calculation.
 		6 years ago
bptc voice: implemented (embedded) link control 9 years ago
crc Prepare for public release 9 years ago
docs Added MMDVM modem specs 9 years ago
fec Prepare for public release 9 years ago
homebrew Fix BM homebrew compatibility (rptrid comparison) 6 years ago
ipsc Checkpoint 9 years ago
terminal voice: implemented (embedded) link control 9 years ago
trellis Checkpoint 9 years ago
vbptc voice: implemented (embedded) link control 9 years ago
.gitattributes Prepare for public release 9 years ago
.gitignore Path fixes 9 years ago
.travis.yml Updated .travis.yml 9 years ago
LICENSE Initial commit 9 years ago
README.md Added button 9 years ago
bits.go Checkpoint 9 years ago
bits_test.go Prepare for public release 9 years ago
controlblock.go Fix test breaking due to vet checks 6 years ago
controlblock_test.go Checkpoint 9 years ago
crc.go Checkpoint 9 years ago
crc_test.go Checkpoint 9 years ago
data.go Support Rate 1/2 Data CRC Mask 6 years ago
data_encoding.go Checkpoint 9 years ago
data_test.go Fix serialization of Confirmed DataBlock 6 years ago
dataheader.go Fix test breaking due to vet checks 6 years ago
dataheader_test.go Fix test breaking due to vet checks 6 years ago
dmr.go Checkpoint 9 years ago
packet.go voice: implemented (embedded) link control 9 years ago
repeater.go Checkpoint 9 years ago
sync.go Prepare for public release 9 years ago
version.go Prepare for public release 9 years ago
voice.go voice: implemented (embedded) link control 9 years ago

README.md

go-dmr

Golang Digital Mobile Radio protocols.

Build Status

References

The DMR Air Interface protocol is specified in Electromagnetic compatibility and Radio spectrum Matters (ERM); Digital Mobile Radio (DMR) Systems; Part 1: DMR Air Interface (AI) protocol, ETSI TS 102 361-1.

The Brandmeister Homebrew protocol is specified in IPSC Protocol Specs for homebrew DMR repeater by Hans DL5DI, Jonathan Naylor (G4KLXG) and Torsten Schultze (DG1HT).

Warning

This implementation is not suitable for commercial use and is for educational purposes only.

Acknowledgements

The implementation is possible because of the invaluable help from the following persons. Thanks for your patience and providing me with sample data and links to test the protocols.

  • Rudy Hardeman (PD0ZRY)
  • Artem Prilutskiy (R3ABM)