<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=utf-8">
<META content="MSHTML 5.50.4807.2300" name=GENERATOR></HEAD>
<BODY>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=546573017-07012010>You
should take a quick look at the fmtx_client command. It already does much
of what you want (with the exception of finding an unused
signal)</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=546573017-07012010></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=546573017-07012010>fmtx_client -f sets the frequency</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=546573017-07012010>fmtx_client -s sets the radio
station</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=546573017-07012010>Note: This must be an eight character string, but
it can be padded with blanks. This is a bug that has been fixed in the
next flash</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=546573017-07012010>e.g. </SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=546573017-07012010>fmtx_client -s aldon </SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=546573017-07012010>will
not work but</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=546573017-07012010>fmtx_client -s "aldon "
</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=546573017-07012010>does
work</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=546573017-07012010></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=546573017-07012010>fmtx_client -t sets the text. This can be any
length and can have embedded blanks</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=546573017-07012010>e.g.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=546573017-07012010>fmtx)client -t "This is a long
test"</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=546573017-07012010>works.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=546573017-07012010></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=546573017-07012010>I've
used this to send messages from my N900 to the RDS display on my car radio and
it has worked nicely. (and members of the family have enjoyed receiving
personalized messages on the car radio)</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=546573017-07012010></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=546573017-07012010>Aldon</SPAN></FONT></DIV>
<BLOCKQUOTE>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> khertan@gmail.com
[mailto:khertan@gmail.com]<B>On Behalf Of </B>Benoît HERVIER<BR><B>Sent:</B>
Thursday, January 07, 2010 12:19 AM<BR><B>To:</B> Martin Grimme<BR><B>Cc:</B>
Aldon Hynes; maemo-developers@maemo.org<BR><B>Subject:</B> Re: FM RDS
data<BR><BR></FONT></DIV>About FM and RDS modifying RDS signal transmited from
the tablet is possible ?<BR><BR>I'm thinking of a small usage, a app that
found the freest frequency (by listening fm with the transmitter) and change
the frequency of transmitted music to the found one and send an rds signal by
the transmitter, so you don't have to change frequency on your car receiver
(or everything else).<BR><BR>I know that fm transmitter emit an rds signal ...
but can that be changed ?<BR><BR>Does there is documentation about the fm
transmitter and receiver somewhere on Maemo ?<BR><BR>Thanks a lot<BR><BR>
<DIV class=gmail_quote>2010/1/6 Martin Grimme <SPAN dir=ltr><<A
href="mailto:martin.grimme@gmail.com">martin.grimme@gmail.com</A>></SPAN><BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">Hi,<BR><BR>the
FM receiver's interface for RDS is exposed via sysfs. So any<BR>application
can read RDS data from it.<BR>The frequency bands the receiver is capable of
are US/EUR (87.5 -<BR>108.00 MHz) and Japan (don't remeber, but I think
starts somewhere at<BR>70 MHz). A region switch in the driver
(sysfs-Interface again but as<BR>root) switches between the frequency
bands.<BR><BR><BR>Martin<BR><BR><BR>2010/1/6, Aldon Hynes <<A
href="mailto:Aldon.Hynes@orient-lodge.com">Aldon.Hynes@orient-lodge.com</A>>:<BR>
<DIV>
<DIV></DIV>
<DIV class=h5>> I have been approached by a person interested in sending
data from a sensor<BR>> via FM to a cellphone which would in term
transmit this data to the<BR>> Internet. I am interested in
figuring out if this is something that could<BR>> be done with an N900.
With that, I have a few specific questions:<BR>><BR>> First, can
anyone point me to information about how to programatically<BR>> receive
RDS data? I've read that the FM receive app is supposed to do
that,<BR>> but I haven't managed to receive RDS data that way yet, and I
don't have the<BR>> source code.<BR>><BR>> Second, does anyone have
any idea what frequencies the FM receiver can tune<BR>> into? The
programs I've seen have focused on the traditional commercial FM<BR>>
band, 88 Mhz to 106 Mhz. Can the FM receiver tune in higher or
lower<BR>> frequencies? If so, what is the real frequency range of
the FM Receiver.<BR>><BR>> Third, are there other data formats that
can easily be sent and/or received<BR>> from the Nokia phone? If
so, can people point me to any of these other data<BR>>
formats?<BR>><BR>> Any help you can provide would be greatly
appreciated.<BR>><BR>> Aldon<BR>><BR>>
_______________________________________________<BR>> maemo-developers
mailing list<BR>> <A
href="mailto:maemo-developers@maemo.org">maemo-developers@maemo.org</A><BR>>
<A target=_blank
href="https://lists.maemo.org/mailman/listinfo/maemo-developers">https://lists.maemo.org/mailman/listinfo/maemo-developers</A><BR>><BR>_______________________________________________<BR>maemo-developers
mailing list<BR><A
href="mailto:maemo-developers@maemo.org">maemo-developers@maemo.org</A><BR><A
target=_blank
href="https://lists.maemo.org/mailman/listinfo/maemo-developers">https://lists.maemo.org/mailman/listinfo/maemo-developers</A><BR></DIV></DIV></BLOCKQUOTE></DIV><BR><BR
clear=all><BR>-- <BR>Benoît HERVIER - <A
href="http://khertan.net/">http://khertan.net/</A><BR><BR></BLOCKQUOTE></BODY></HTML>