diff options
| author | Christian Pointner <equinox@mur.at> | 2011-09-27 20:25:02 +0000 |
|---|---|---|
| committer | Christian Pointner <equinox@mur.at> | 2011-09-27 20:25:02 +0000 |
| commit | b21a13fe3326e5cef1ba565e77b70790ca90998e (patch) | |
| tree | d638b99276c085def39f3cc2af53ef5428822732 /doc/protocols/ground-crx.txt | |
| parent | Initial version of MPU (diff) | |
added dtmf-bin translation table
ihu-mpu communicaton over rs232 not spi
git-svn-id: https://svn.spreadspace.org/mur.sat@173 7de4ea59-55d0-425e-a1af-a3118ea81d4c
Diffstat (limited to 'doc/protocols/ground-crx.txt')
| -rw-r--r-- | doc/protocols/ground-crx.txt | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/doc/protocols/ground-crx.txt b/doc/protocols/ground-crx.txt index 504d914..1a92ab0 100644 --- a/doc/protocols/ground-crx.txt +++ b/doc/protocols/ground-crx.txt @@ -18,7 +18,27 @@ Frame Checksum: --------- -XOR over Signs intrepreted as HEX (0-9A-D#*) -> (0-9A-F) +XOR over Signs intrepreted as 4-bit numbers (see translation table below) + + DTMF-Sign | Number + ------------+---------- + D | 0 + 1 | 1 + 2 | 2 + 3 | 3 + 4 | 4 + 5 | 5 + 6 | 6 + 7 | 7 + 8 | 8 + 9 | 9 + 0 | 10 + * | 11 + # | 12 + A | 13 + B | 14 + C | 15 + Codes: ------ |