Well done.
Look forward to trying this out. From: HackRF-dev [mailto:[email protected]] On Behalf Of Ilker Temir Sent: Sunday, 28 June 2015 11:49 AM To: Donald Pupecki Cc: [email protected] Subject: Re: [Hackrf-dev] Adding HackRF support to dump1090 Thanks! signed to unsigned conversion was the culprit. I first tested it with cox by converting the file and then tweaked my code to do that within the receive path. I now have a working port of dump1090 to HackRF. I need to do some cleanup but as soon as done, will post it on GitHub and announce on this forum. On 6/27/15 1:29 PM, Donald Pupecki wrote: I don't believe hackrf_transfer and rtl_sdr output in the same format. They are both 8 bit but the hackrf output is signed whereas the rtl output is unsigned. If you get this working a hackrf please post the port on github or somewhere as that would be sweet. On Jun 27, 2015 4:00 PM, "Ilker Temir" <[email protected] <mailto:[email protected]> > wrote: Hello, I am trying to add HackRF support to Salvatore Sanfilippo's dump1090 tool (https://github.com/antirez/dump1090) as a learning exercise. The tool was originally designed for RTL SDR devices. However, I can't seem to get this port to work. To eliminate potential issues in my code, I simplified the troubleshooting steps. Here are the basic set of troubleshooting steps I am using: Per tool's documentation, a data file can be captured with rtl_sdr utility in the following way: rtl_sdr -f 1090000000 -s 2000000 -g 50 output.bin Then you can pipe it into dump1090 like this: dump1090 --ifile output.bin I made an assumption that the HackRF equivalent of rtl_sdr command above would be the following: hackrf_transfer -r output.bin -f 1090000000 -s 2000000 -p 0 -a 0 -l 40 -g 62 However, capturing packets with HackRF this way and piping them into dump1090 doesn't do anything. I have tried this sitting next to an airport and capturing packets while planes were landing and taking off. I don't have an RTL SDR dongle so I can't test the rtl_sdr command myself. It didn't make to sense to buy a RTL SDR device after HackRF but if I can't crack this, I am considering to buy one. BTW, I also tried different gain settings, and sample rate of 8e6 with hackrf_transfer, no difference. That said, I never enabled amp_enable. Would anyone know if rtl_sdr and hackrf_transfer capture the packets in the same way and format? Or do I need to do some kind of a conversion or translation in between the two to make them compatible? Any help or idea will be appreciated. P.S. I am aware of gr-air-modes for HackRF to decode ADS-B signals. My goal is to hack dump1090 and add HackRF support as a learning exercise. Thanks, Ilker _______________________________________________ HackRF-dev mailing list [email protected] <mailto:[email protected]> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
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