Comments (2)
Hi,
I found #define DMR_DUMP in include/config.h which theoretically dumps DMR packets,
now all need to do is decipher this:
Sync: +DMR o: 24 mod: GFSK g: 25.000000 inlvl: 46% 101000101000010001110110 110111111111010101111101011101011101111101011101 [slot0] slot1 Slot idle
Once I am happy with the data content I will modify the source so it does following:
- prints out the debug into stderr (not stdout)
- has a switch for data out (stdout)
- another switch for data format (raw binary, hex or ascii).
That is if I understand the meaning of '101000101000010001110110' bit string.
Edit: the first bit stream is CACH data, which is not payload that I am after....
from dsd.
After a bit more digging I found a way to dump data payload (in similar way the CACH data is dumped), what I don't quiet understand is where the 90 comes from in:
dibit_p = state->dibit_buf_p - 90;
in dmr_data.c, L41
In addition to that the data is RATE 1/2 or 3/4 encoded, which means I have to decode it for it to be usable. There is a vitrebi implementation included (used in dstar_header.c), but it is way over my head how to implement it with DMR data.
The raw data I get looks like this:
000100100100110000101101001010000010010101100000001010010000101100001000100000000100010100111100001001011110101010111010100001100111000111011100011100111000001110111101100100110110000001100101110111111111010101111101011101011101111101011101100100101011111101101110010001100101000101110001101101001000110010100110110101001111110001100001000010110100001010111100110000101000000000001010110001000000111010110000001011011001000000000110000000000100010001100001001000101100000001011110110111111111010101111101011101
from dsd.
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from dsd.