User talk:Gabrys
From Openmoko
(→Step three: load ALSA settings to switch codec "mode" to GSM BT) |
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Line 32: | Line 32: | ||
Connection | Connection | ||
− | + | < ACL 00:13:17:78:7B:A3 handle 42 state 1 lm MASTER | |
Test2: | Test2: | ||
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After that you should have the following command output: | After that you should have the following command output: | ||
− | hcitool con | + | root@om-gta02 ~ $ hcitool con |
Connections: | Connections: | ||
< SCO 00:13:17:78:7B:A3 handle 45 state 1 lm SLAVE | < SCO 00:13:17:78:7B:A3 handle 45 state 1 lm SLAVE | ||
< ACL 00:13:17:78:7B:A3 handle 42 state 1 lm MASTER | < ACL 00:13:17:78:7B:A3 handle 42 state 1 lm MASTER |
Revision as of 22:41, 6 April 2010
Contents |
Testing GSM <-> BT
Basics: We need to tell audio codec to route sound from GSM chip to BT chip. Codec is controlled by ALSA and mixer settings.
Prerequisites: BT device must be paired before the operation.
Note: 00:13:17:78:7B:A3 is BT MAC of my headset, modify accordingly.
Step one: powering on bluetooth, setting up bluetoothd, pairing
Set /etc/bluetooth/audio.conf like this:
# SCO routing. Either PCM or HCI (in which case audio is routed to/from ALSA) # Defaults to HCI SCORouting=PCM
Then
echo 1 > /sys/bus/platform/devices/neo1973-pm-bt.0/power_on sleep 1 bluetoothd hciconfig hci0 up
Do this ONCE: use simple-agent from here: http://wiki.openmoko.org/wiki/Manually_using_Bluetooth#Pair to pair the device (or pair in any other valid way).
Connect to the headset:
BTADAPTER=`dbus-send --system --dest=org.bluez --print-reply / org.bluez.Manager.DefaultAdapter | tail -1 | sed 's/^.*"\(.*\)".*$/\1/'` dbus-send --system --dest=org.bluez --print-reply $BTADAPTER/dev_00_13_17_78_7B_A3 org.bluez.Headset.Connect
Test: "hcitool con" should say:
Connection < ACL 00:13:17:78:7B:A3 handle 42 state 1 lm MASTER
Test2:
BTADAPTER=`dbus-send --system --dest=org.bluez --print-reply / org.bluez.Manager.DefaultAdapter | tail -1 | sed 's/^.*"\(.*\)".*$/\1/'` dbus-send --system --dest=org.bluez --print-reply $BTADAPTER/dev_00_13_17_78_7B_A3 org.bluez.Headset.Connect
should say: Error org.bluez.Error.AlreadyConnected: Already Connected
More debug
root@om-gta02 /usr/lib/python2.6/site-packages $ dbus-send --system --dest=org.bluez --print-reply $BTADAPTER/dev_00_13_17_78_7B_A3 org.bluez.Headset.Disconnect method return sender=:1.18 -> dest=:1.287 reply_serial=2 root@om-gta02 /usr/lib/python2.6/site-packages $ dbus-send --system --dest=org.bluez --print-reply $BTADAPTER/dev_00_13_17_78_7B_A3 org.bluez.Headset.Connect Error org.bluez.Error.ConnectionAttemptFailed: Input/output error root@om-gta02 /usr/lib/python2.6/site-packages $ dbus-send --system --dest=org.bluez --print-reply $BTADAPTER/dev_00_13_17_78_7B_A3 org.bluez.Headset.Connect method return sender=:1.18 -> dest=:1.290 reply_serial=2 root@om-gta02 /usr/lib/python2.6/site-packages $ dbus-send --system --dest=org.bluez --print-reply $BTADAPTER/dev_00_13_17_78_7B_A3 org.bluez.Headset.Play method return sender=:1.18 -> dest=:1.292 reply_serial=2
Step two: make a call
Call to the phone and answer (or place a call, whichever is cheaper).
Step three: load ALSA settings to switch codec "mode" to GSM <=> BT
Wait till frameworkd sets its statefile and then overwrite it with your own:
alsactl -f /usr/share/shr/scenarii/gsmbluetooth.state restore amixer sset "Capture Left Mixer" "Analogue Mix Right" amixer sset "Capture Left Mixer" "Analogue Mix Left"
(last two lines due to kernel bug).
Issue dbus call to start exchanging audio between GSM and BT:
BTADAPTER=`dbus-send --system --dest=org.bluez --print-reply / org.bluez.Manager.DefaultAdapter | tail -1 | sed 's/^.*"\(.*\)".*$/\1/'` dbus-send --system --dest=org.bluez --print-reply $BTADAPTER/dev_00_13_17_78_7B_A3 org.bluez.Headset.Play
Set bluetooth IIS to 8000 rate and keep it with a sleep in Python:
python set_pcm.py
Where the set_pcm.py is:
import alsaaudio import time pcm_play = alsaaudio.PCM( alsaaudio.PCM_PLAYBACK, alsaaudio.PCM_NONBLOCK, "hw:0,1" ) pcm_play.setchannels(1) pcm_play.setrate(8000) pcm_play.setformat(alsaaudio.PCM_FORMAT_S16_LE) pcm_play.setperiodsize(500000) pcm_cap = alsaaudio.PCM( alsaaudio.PCM_CAPTURE, alsaaudio.PCM_NONBLOCK, "hw:0,1" ) pcm_cap.setchannels(1) pcm_cap.setrate(8000) pcm_cap.setformat(alsaaudio.PCM_FORMAT_S16_LE) pcm_cap.setperiodsize(500000) while True: time.sleep(999) # wait till user quits this nasty program
Now BT should work. Don't touch the on-screen sliders though, because it will change ALSA settings and you'll lose BT connection.
After that you should have the following command output:
root@om-gta02 ~ $ hcitool con Connections: < SCO 00:13:17:78:7B:A3 handle 45 state 1 lm SLAVE < ACL 00:13:17:78:7B:A3 handle 42 state 1 lm MASTER