WSPR on a Raspberry Pi using Raspbian

Having got WSPR and WSJT working on my Ubuntu laptop, the next challenge was to get WSPR working on the more restricted  Raspberry Pi

First discovery was that a new version of the RPI image was available 2012-10-28-wheezy-raspbian.zip so that was downloaded and installed. At installation time I took the opportunity to overclock the board at 1GHz
Searching the internet I came across a blog "Compiling WSPR on a Raspberry Pi" at http://timbertops.co.uk/blog/?p=88  I also found some improvement pointers at http://www.vk2mev.net/?p=96

the "merged" steps (before I forgot how I did it) are:-

vi Makefile (edit wouldnt work on my machine on this file)
make sure line 5 reads:-
FFLAGS = -g -O2 -fno-range-check -ffixed-line-length-none -Wall -Wno-character-truncation -Wno-conversion -Wtabs -fPIC -mfloat-abi=hard

make sure line 9 reads:-
CFLAGS = -Wall -O0 -g -Wall -O0 -g -mfloat-abi=hard

these make sure the hardware floating point processor is used (speeds up decode)
next type the following:-

sudoapt-get update

sudoapt-get install build-essential subversion python2.7-dev python-numpy python-imaging-tk python-pmw libportaudio2 portaudio19-dev libsamplerate0-dev gfortran cl-fftw3 python-dev hamlib-utils3

svn co http://svn.berlios.de/svnroot/repos/wsjt/branches/wspr

cd wspr

./configure −-with-portaudio-include-dir=/usr/include −-with-portaudio-lib-dir=/usr/lib/arm-linux-gnueabihf
sudomakeinstall(takes a while!)
The RPI has an audio output but no audio input. Some have used $5 USB soundcards, but I   did not have one in my collection. Fortunately I still had the I-MIC which I used with my Ipad to run ISDR. A web search revealed this should work with the RPI without any software updates. 
Plugging in the Imic it appeared in the list of audio playback and recording devices:- 
aplay -l **** List of PLAYBACK Hardware Devices **** card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]   Subdevices: 8/8   Subdevice #0: subdevice #0   Subdevice #1: subdevice #1   Subdevice #2: subdevice #2   Subdevice #3: subdevice #3   Subdevice #4: subdevice #4   Subdevice #5: subdevice #5   Subdevice #6: subdevice #6   Subdevice #7: subdevice #7 card 1: system [iMic USB audio system], device 0: USB Audio [USB Audio]   Subdevices: 1/1   Subdevice #0: subdevice #0

arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: system [iMic USB audio system], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

time to launch WSPR:-

wspr
The usual screen for WSPR3.1 appeared which looked like success. I selected the imic as   audio in and audio out source in options
Hooked it up to the K3 and got decodes!
Time to try Transmit. I usually key the transmitter via the radio RS232 port but although the RPI has an RS232 port it needed a level converter which I did not have. I resorted to   using the K3 VOX with success and my signal was successfully decoded:-


















2012-11-03 16:10 
 G4FRE 
 14.097139 
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 IX1CKN 
 JN35pr 
 995 
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 2012-11-03 16:10 
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 2012-11-03 16:10 
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One thing I did discover during the above process was that although the RPI sets its clock via NTP this only happens if the internet connection is available at boot time. If you   connect the internet lead after boot time the clock will be off
The observant will have noticed I did not add "dwc_otg.speed=1" to cmdline.txt as recommended by VK2MEV. I did try it once, but when booting,  the RPI didnt find the keyboard or USB mouse and hence wouldnt let me log in. I had to resort to removing the phrase from the SD card using my windows laptop to get it to boot properly