Показаны сообщения с ярлыком arm. Показать все сообщения
Показаны сообщения с ярлыком arm. Показать все сообщения

пятница, 7 декабря 2012 г.

RaspberryPi && SDR


1. prepare
    #prepare os (there was an old raspbian)
    sudo apt-get update
    sudo apt-get upgrade
    sudo rpi-update
    sudo raspi-config
    #overclock to medium
    #don't load DM on start
    #minimize video memory
    #without this step there were gaps in sound for a half a second every second

    #prepare soft
    sudo apt-get install git libusb-dev libusb-1.0 libtool cmake pkg-config
    git clone git://git.osmocom.org/rtl-sdr.git

2. compile rtl-sdr
    cd rtl-sdr/
    mkdir build
    cd build
    cmake ../ -DINSTALL_UDEV_RULES=ON
    make
    sudo make install
    sudo ldconfig
    sudo make install-udev-rules
3. run
    rtl_tcp -a 192.168.1.3
4. listen to music
    #i've used sdr# (http://sdrsharp.com/) from my laptop
    #but it is possible to use rtl_fm and aplay directly from raspi
    rtl_fm -f 103700000 -s 48000 -g 9 -l 10 - | aplay -t raw -r 48000 -c 1 -f S16_LE

понедельник, 2 июля 2012 г.

Getting started with Raspberry Pi...


Hardware:
1. Raspberry Pi Model B (+ delivery from element14.com) - 2000RUR
2. Hama кабель HDMI M-M - 310RUR
3. Transcend SDHC Class 10 32GB - 1275RUR
4. Onext universal charger 1000mA - 300RUR
5. HDMI-DVI-D VC-004G - 270RUR
6. USB 2.0 А - microUSB B - 75RUR
---
Total: 4230RUR

Software:
http://distribution.hexxeh.net/raspbian/raspbian-r3.zip

Doesn't work yet. The red pwr lights on, green ok lights then flashes some times then again lights. But no any output on the monitor (Samsung SyncMaster 930BF).

--
UP:
To make the monitor works change confix.txt to

hdmi_force_hotplug=1
hdmi_drive=1
hdmi_group=2
hdmi_mode=35
config_hdmi_boost=1
test_mode=1

--
For no-monitor configuration:

Set config.txt to empty

Find r-pi with Advanced Port Scanner v1.3
connect to ssh with putty
to login use root:hexxeh
If there is no DNS resolvings (fixed in later distribution versions):
the default dns records in /etc/resolv.conf  is 8.8.8.4 (google)
I use akado internet provider, 
so i need to add DNS-servers of akado:
ns01.comcor-tv.ru (217.10.32.5)
ns02.comcor-tv.ru (217.10.35.5)
dns01.catv.ext.ru (217.10.44.35)
dns02.catv.ext.ru (217.10.36.5)
dns03.catv.ext.ru (217.10.32.4)
dns04.catv.ext.ru (217.10.39.4)

then install some software for development with apt-get
sudo apt-get install mc