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jsharper is offline jsharper
2009-12-30 , 18:12
Posts: 75 | Thanked: 59 times | Joined on Nov 2009 @ Gilbert, AZ, USA
#51
Originally Posted by tpinhao View Post
Hello Guys

Are you sure the changing the contents of that file is going to change the Power Level ?

I think that that file is not a "config" file but it is a Log file, if you notice that file is updated whenever you start the FM Transmitter, so the only thing that that file is telling you is the current power-level.

The contents of my file where:

0

And after i started the FM Transmitter it changed to 111.

So i really think is a Log file

Maybe it cannot be changed this easily
Files in /sys and /proc are not real files -- they are special interfaces to the kernel and drivers that are exposed to act like files. writing to the power_level "file" actually sends the new value directly to the running driver which appears to then immediately send the new value to the Si4713 fm transmitter chip via the i2c bus. I can confirm through observation that there is indeed an audible pop followed by an adjustment in the ability to receive the fm signal the moment after echoing a new value to that file.
 

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mason is offline mason
2009-12-31 , 00:26
Posts: 93 | Thanked: 36 times | Joined on Nov 2009 @ Germany / Mainz
#52
pretty nice find, thanks guys .. now we just need to find out to mod the kernel driver to set the value
 
SM6VIT is offline SM6VIT
2009-12-31 , 01:01
Posts: 6 | Thanked: 0 times | Joined on Dec 2009 @ Göteborg, Sweden
#53
I get 113 on mine.

Rick
 
tirtawn is offline tirtawn
2009-12-31 , 07:15
Posts: 328 | Thanked: 101 times | Joined on Dec 2009
#54
Originally Posted by jsharper View Post
close.
Code:
echo 118 > /sys/class/i2c-adapter/i2c-2/2-0063/power_level

Blah...my bad :P..I should use echo not cat..not sure what i was thinking when i type that mesg ..

Thanks.
 

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tangs is offline tangs
2009-12-31 , 19:17
Posts: 147 | Thanked: 32 times | Joined on Sep 2009
#55
does it really work ? could you explain very precisely how to do ?

thanx
 
JuhS is offline JuhS
2009-12-31 , 19:23
Posts: 21 | Thanked: 15 times | Joined on Dec 2009 @ Finland
#56
I have tested the radio transmitter in a Volvo V70, and it serves it's purpose. Compared to the old fashioned way of burning CDs I couldn't ask for more. Remember, it's a phone, not a radio station..
 
Bratag is offline Bratag
2009-12-31 , 19:37
Posts: 2,014 | Thanked: 1,581 times | Joined on Sep 2009
#57
Originally Posted by tangs View Post
does it really work ? could you explain very precisely how to do ?

thanx
yes it really works - to do it - simply open a terminal, run root, type in the echo command a few posts back.
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tangs is offline tangs
2009-12-31 , 20:21
Posts: 147 | Thanked: 32 times | Joined on Sep 2009
#58
and...... how to run root ?
 
egoshin is offline egoshin
2009-12-31 , 22:03
Posts: 992 | Thanked: 995 times | Joined on Dec 2009 @ California
#59
Originally Posted by tangs View Post
and...... how to run root ?
http://wiki.maemo.org/Root_access
 
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YoDude is offline YoDude
2009-12-31 , 23:56
Posts: 2,869 | Thanked: 1,784 times | Joined on Feb 2007 @ Po' Bo'. PA
#60
Originally Posted by Bratag View Post
yes it really works - to do it - simply open a terminal, run root, type in the echo command a few posts back.
Is it persistent?
Must the transmitter be powered up?
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