On 01/31/2017 07:50 PM, Russel Winder wrote:
Hi,
Is anyone actively working on the rtl2832_sdr driver?
I am particularly interested in anyone who has code for turning the
byte stream from /dev/swradio0 into an ETI stream. Or failing that
getting enough data about the API for using /dev/swradio0 so as to
write a byte sequence to ETI driver based on the dab2eti program in
DABtool (which uses the librtlsdr mechanism instead of the
/dev/swradio0 one).
Easiest way to test it just use v4l2-ctl to configure device and then
read data from device file.
$ #set ADC 2M
$ v4l2-ctl -d /dev/swradio0 --tuner=0 --set-freq=2.000
Frequency for tuner 0 set to 2000000 (2.000000 MHz)
$ #set rf tuner 98.1MHz
$ v4l2-ctl -d /dev/swradio0 --tuner=1 --set-freq=98.1
Frequency for tuner 1 set to 98100000 (98.100000 MHz)
$ # dump 32 I/Q samples
$ cat /dev/swradio0 |hexdump -n 64 -C
00000000 80 80 7e 7d 84 84 70 71 a8 5f 74 9f 6e 53 b4 9d
|..~}..pq._t.nS..|
00000010 53 8f 9e 4c 71 b8 75 28 a1 8a 57 8c 9d 46 73 c7
|S..Lq.u(..W..Fs.|
00000020 79 60 a6 ae 36 82 94 60 6c bf 7e 6a a7 9e 55 73
|y`..6..`l.~j..Us|
00000030 a8 72 5c a6 7f 35 a2 a2 61 54 ce 8a 57 b3 8e 50
|.r\..5..aT..W..P|
00000040
$
Looking v4l2-ctl code could give some ideas how to use control IOCTLs.
Data can be read both read() or mmap() method.
regards
Antti
--
http://palosaari.fi/
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