User:Historybuff/notes

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(elrond's incantation for recording)
m (formatting)
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alsactl can do it (alsamixer)
 
alsactl can do it (alsamixer)
  
 +
<pre>
 
alsactl -f /etc/alsa/capturehandset.state restore
 
alsactl -f /etc/alsa/capturehandset.state restore
 
arecord -f cd -t wav -d 10 foo.wav
 
arecord -f cd -t wav -d 10 foo.wav
Line 33: Line 34:
 
alsactl -f /etc/alsa/stereoout.state restore
 
alsactl -f /etc/alsa/stereoout.state restore
 
aplay foo.wav
 
aplay foo.wav
 +
</pre>

Revision as of 23:58, 7 September 2007

Orientation of screen:

xrandr -o 1 turns screen to landscape mode (xrandr -o 0 to go back to ordinary portrait)

Getting Battery status: cat `find /sys/ -name battvolt` the output is in millivolts. ~4224 millivolts is completely charged (observed 3568 lowest, 4207 highest)

exact location is /sys/devices/platform/s3c2410-i2c/i2c-0/0-0008/

nicer script (cwd must be above)- CHARGE=`cat battvolt` && awk -v charge=${CHARGE} 'BEGIN {print charge/4224*100" "charge }'


GTA01_gsm_modem for AT commands; Gsmd for manual AT stuff

To get sound working: alsactl -f /etc/alsa/gsmhandset.state restore

Trying to record sound from the mic:

cat /dev/dsp does sample the ADC It's then 'simply' a case of setting the mixer controls so that the sound is routed from the mic to the adc See the nice simple explanatory block diagram in the middle of http://wiki.openmoko.org/wiki/Neo1973_Audio_Subsystem for guidance. In principle. You need to find which mic input the mic is connected to, setup the input gain and mic selector appropriately,setup the ALC mixer right, then set it up to route to the left or right ADC alsactl can do it (alsamixer)

alsactl -f /etc/alsa/capturehandset.state restore
arecord -f cd -t wav -d 10 foo.wav
Make noise for 10 seconds
alsactl -f /etc/alsa/stereoout.state restore
aplay foo.wav
Personal tools

Orientation of screen:

xrandr -o 1 turns screen to landscape mode (xrandr -o 0 to go back to ordinary portrait)

Getting Battery status: cat `find /sys/ -name battvolt` the output is in millivolts. ~4224 millivolts is completely charged (observed 3568 lowest, 4207 highest)

exact location is /sys/devices/platform/s3c2410-i2c/i2c-0/0-0008/

nicer script (cwd must be above)- CHARGE=`cat battvolt` && awk -v charge=${CHARGE} 'BEGIN {print charge/4224*100" "charge }'


GTA01_gsm_modem for AT commands; Gsmd for manual AT stuff

To get sound working: alsactl -f /etc/alsa/gsmhandset.state restore

Trying to record sound from the mic:

cat /dev/dsp does sample the ADC It's then 'simply' a case of setting the mixer controls so that the sound is routed from the mic to the adc See the nice simple explanatory block diagram in the middle of http://wiki.openmoko.org/wiki/Neo1973_Audio_Subsystem for guidance. In principle. You need to find which mic input the mic is connected to, setup the input gain and mic selector appropriately,setup the ALC mixer right, then set it up to route to the left or right ADC alsactl can do it (alsamixer)

alsactl -f /etc/alsa/capturehandset.state restore
arecord -f cd -t wav -d 10 foo.wav
Make noise for 10 seconds
alsactl -f /etc/alsa/stereoout.state restore
aplay foo.wav