kopia lustrzana https://github.com/rs1729/RS
DFM-06
rodzic
dec7052418
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DFM-06:
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Quellcode gibt es schon hier:
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http://www.uni-kl.de/AFG/dfm-06.htm
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GPS Chip:
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Navman/Telit
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Modulation: FSK
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raw: 2500 bit/s.
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Manchester codiert -> 1250 baud
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Frame: 280 bit, davon 16 bit Header 0x45CF, dann
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3 Bloecke (CFG,DAT1,DAT2) mit (56,104,104) bits
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Interleaved: 7x8, 13x8, 13x8
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erweiterter systematischer [8,4]-Hamming-Code, erste 4 bit sind Daten
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Big Endian
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CFG-Block beginnt mit nibble
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0,1,2, 0,1,3, 0,1,4, 0,1,5, 0,1,6,
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0,1,2, ...
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DFM-06 (341110) Seriennummer xxxxxx:
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CFG-Block 6xxxxxx (Kanal 6)
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(fehlt bei aelteren DFMs)
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DAT-Block 48bit + 4bit-PCK_ID 0x0..0x8 (letztes nibble):
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PCK_ID bitpos
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0x0 24..31 Counter: 8 bit
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0x1 32..48 GPS-msec : 16bit (sec*1e3)
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0x2 0..31 GPS-lat : 32bit, Faktor 1e7
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32..48 hor-V m/s: 16bit, Faktor 1e2
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0x3 0..31 GPS-lon : 32bit, Faktor 1e7
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32..48 direction: 16bit, Faktor 1e2
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0x4 0..31 GPS-alt m: 32bit, Faktor 1e2
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32..48 ver-V m/s: 16bit, Faktor 1e2
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0x8 0..11 Jahr : 12bit
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12..15 Monat: 4bit
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16..20 Tag : 5bit
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21..25 Std : 5bit
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26..31 Min : 6bit
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0xF 0..47 000000000000
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