dtheriault
commented
9 years ago Ahh, looks like -o is missing from rtl_power.c
doug@c1d1:~$ rtl_power -d 0 -f 134995000:135005000:1 -r 2048000 -o 135000000 -c 80% /dev/shm/rtl_0 -i 10 -e 30 Found 1 device(s): 0: Realtek, RTL2838UHIDIR, SN: 00000001
Using device 0: Generic RTL2832U OEM rtl_power: invalid option -- 'o'
New droid, fresh git clone of project. Built librtlsdr fresh using mkdir build cmake ../ -DINSTALL_UDEV_RULES=ON -DDETACH_KERNEL_DRIVER=ON make sudo make install
Edited cal.sh script to remove dongle0 fudge factor and mixer offset freq, set freq to 135mhz for my bench test. Was performing freq counter measurement of pin 10 off the R820T tuner.
First iteration of cal.sh threw:
doug@c1d1:~/software/wsp/medusa/software/librtlhpsdr$ ./cal.sh Found a total of 1 dongles. Warming up for 30 seconds. Starting calibration on first 0 dongles, this will take 20 seconds. 20 left 10 left Starting calibration on remaining 1 dongles, this will take 20 seconds. 20 left 10 left Calculating calibration values for dongles 0 - 0 ... freq_offset cat: /dev/shm/rtl_0: No such file or directory ./cal.sh: line 93: offset / loop : division by 0 (error token is "loop ")
Executing cal.sh again, got the hang.
doug@c1d1:~/software/wsp/medusa/software/librtlhpsdr$ ./cal.sh Found a total of 1 dongles. Warming up for 30 seconds. Write failed: Broken pipe
Power cycle the droid, view of the syslog:
Feb 21 15:31:57 c1d1 kernel: [ 246.266929@0] r820t 0-001a: destroying instance Feb 21 15:31:57 c1d1 kernel: [ 246.268204@0] usb 1-1.2: dvb_usb_v2: 'Realtek RTL2832U reference design' successfully deinitialized and disconnected Feb 21 15:31:57 c1d1 kernel: [ 246.355505@0] ------------[ cut here ]------------ Feb 21 15:31:57 c1d1 kernel: [ 246.355528@0] WARNING: at kernel/rcutree.c:2117 rcu_process_callbacks+0x434/0x4c0() Feb 21 15:31:57 c1d1 kernel: [ 246.355534@0] Modules linked in: r820t rtl2832 w1_gpio wire dvb_usb_rtl28xxu rtl2830 dvb_usb_v2 fuse nls_cp437 Feb 21 15:31:57 c1d1 kernel: [ 246.355561@0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.10.69-69 #1 Feb 21 15:31:57 c1d1 kernel: [ 246.355584@0]