Hi Marcel, is it possible to use Version 4.27 for embedded systems without any Desktop Environment only with commandline? I will try to switch to 4.27. Regards Sebastian > -----Original Message----- > From: Marcel Holtmann [mailto:marcel@xxxxxxxxxxxx] > Sent: Sunday, February 01, 2009 5:52 PM > To: Matuschka, Sebastian > Cc: linux-bluetooth@xxxxxxxxxxxxxxx > Subject: Re: How can i configure bluez to transmit Voice over PCM > > Hi Sebastian, > > > i'm using bluez 3.36 on an embedded system with a CSR Chip connected. > > Communication via HCI over UART works well. I need to receive and send > > voice from/to a headset and therefore I want to send/get the voice as > > PCM to the CSR chip. The PCM pins of the CSR Chip are connected to the > > SSC pins of an avr32 microcontroller. The CSR chip is configured to use > > PCM as soon as the Host produces Clock, otherwise it tries to transmit > > voice per HCI which is too slow (only 115200 baudrate for a 8kHz PCM > > stream). > > In etc/bluetooth/audio.conf I have set SCORouting=PCM > > In etc/Bluetooth/asound.conf I have written the following: > > ##################### > > pcm.headset { > > type bluetooth > > } > > ctl.headset { > > type bluetooth > > } > > ##################### > > But bluez is still sending voice over HCI, which is ok because: How > > should it know where to transmit the PCM stream. I need a device but I > > am not sure what exactly is needed. > > Do I have to write a dummy soundcard driver which only sends and > > receives pcm over the ssc pins? I guess a pseudo UART device for SSC > > isn't enough because bluez needs an alsa device, correct? > > > > For a quick and dirty solution: Is it possible to let bluez reduce the > > soundquality so it works over HCI any way? > > > > Are my settings correct or have I missed something? > > I would really advise you to start using 4.27 instead of a previous > major version that is not developed. > > Also when using PCM for SCO then you need to use the D-Bus API for > headsets and not the ALSA plugin. > > Regards > > Marcel > -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
