[ gpsdrive ] oddities reading from usb

Sat Aug 23 13:09:10 AKDT 2008

Might be barking up the wrong list but...

I try to get gpsdrive (and gpsd) to read from the usb dongle i use.

I cant seem to get gpsd to read it, nor can i 'hexdump -C /dev/ttyUSB0' 
properly. I get all kinds of rubbish, and after a while it slips into 
readable data, then after a while pops back to garbage.

Hexdump -C gives (selected cuts)

00000460  00 00 00 80 00 00 00 00  00 00 00 00 80 00 80 80  |................|
00000470  80 00 80 00 00 80 00 00  80 80 00 00 80 00 80 80  |................|
00000480  80 00 80 00 00 80 00 00  00 00 00 00 80 00 00 00  |................|
00000490  80 00 80 e0 00 80 78 80  00 80 78 80 78 f8 80 80  |......x...x.x...|
000004a0  78 78 f8 80 00 80 78 f8  80 f8 80 80 00 78 78 00  |xx....x......xx.|
000004b0  f8 00 78 78 80 00 78 00  80 00 80 00 78 78 80 80  |..xx..x.....xx..|
000004c0  78 78 80 00 78 00 f8 80  f8 f8 80 80 78 78 80 00  |xx..x.......xx..|
000004d0  78 78 80 f8 00 78 80 80  80 80 80 80 80 78 78 80  |xx...x.......xx.|
000004e0  00 78 78 80 f8 00 78 00  78 00 80 00 80 00 80 00  |.xx...x.x.......|
000004f0  80 80 78 80 80 f8 80 f8  00 f8 78 00 80 78 00 80  |..x.......x..x..|

00006070  f5 b6 55 94 b6 f6 16 b5  12 74 b9 bb 4a 65 55 94  |..U......t..JeU.|
00006080  96 55 d4 96 b5 56 94 b6  54 b5 54 94 96 55 94 b6  |.U...V..T.T..U..|
00006090  f4 b6 55 f4 96 56 b5 54  d4 a5 2d 91 b4 55 16 54  |..U..V.T..-..U.T|
000060a0  a7 fe 74 b9 37 a5 51 a5  ad a2 51 a2 5b 55 f4 95  |..t.7.Q...Q.[U..|
000060b0  56 25 51 d1 95 4a d6 76  25 59 55 aa aa aa 95 2a  |V%Q..J.v%YU....*|
000060c0  52 95 b7 76 25 a2 51 5d  dd 09 74 b9 3b 25 a5 59  |R..v%.Q]..t.;%.Y|
000060d0  55 a2 2b f5 96 55 b4 96  56 f4 56 56 56 54 54 55  |U.+..U..V.VVVTTU|
000060e0  55 55 14 b5 12 74 b9 6e  66 95 94 b4 97 94 36 25  |UU...t.nf.....6%|
000060f0  d9 55 a2 bd 59 b3 51 d1  95 4a d6 76 25 5d 51 a2  |.U..Y.Q..J.v%]Q.|

and after a  long while i suddenly MIGHT get readable

00009720  0d 0a 24 47 50 47 53 56  2c 33 2c 33 2c 31 32 2c  |..$GPGSV,3,3,12,|
00009730  32 36 2c 31 35 2c 30 32  31 2c 2c 30 38 2c 31 35  |26,15,021,,08,15|
00009740  2c 33 32 39 2c 32 31 2c  32 37 2c 30 39 2c 33 30  |,329,21,27,09,30|
00009750  34 2c 33 39 2c 30 37 2c  30 38 2c 32 39 33 2c 34  |4,39,07,08,293,4|
00009760  31 2a 37 44 0d 0a 24 47  50 52 4d 43 2c 32 30 35  |1*7D..$GPRMC,205|
00009770  30 32 37 2e 30 30 30 2c  41 2c 35 39 31 37 2e 35  |027.000,A,5917.5|
00009780  39 31 35 2c 4e 2c 30 31  38 31 35 2e 36 32 31 30  |915,N,01815.6210|
00009790  2c 45 2c 30 2e 32 39 2c  37 32 2e 31 33 2c 32 33  |,E,0.29,72.13,23|
000097a0  30 38 30 38 2c 2c 2a 33  36 0d 0a 24 47 50 47 47  |0808,,*36..$GPGG|

I cant telnet to gpsd and get anything at all.

rikard at blip:~> telnet 127.0.0.1 2947
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.

(nothing echoes at all)
^]

telnet>

the odd part is i DID have it running before i upgraded gpsdrive and gpsd.
After that it is just not working.
And i HAVE downgraded them again...
And it does work flawlessly under Windows...

This is what happens as i plug it in:

usb 4-1: new full speed USB device using uhci_hcd and address 5
usb 4-1: new device found, idVendor=067b, idProduct=2303
usb 4-1: new device strings: Mfr=1, Product=2, SerialNumber=0
usb 4-1: Product: USB-Serial Controller
usb 4-1: Manufacturer: Prolific Technology Inc.
usb 4-1: configuration #1 chosen from 1 choice
pl2303 4-1:1.0: pl2303 converter detected
usb 4-1: pl2303 converter now attached to ttyUSB0

and 'ps -ax |grep gpsd' gives 
2550 ?        S<s    0:00 /usr/sbin/gpsd -F /var/run/gpsd.socket /dev/ttyUSB0

gpsd 2.37
gpsdrive Version 2.10pre4

do i have a bad USB device or what gives???

/Rikard
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