109 lines
3.1 KiB
Markdown
109 lines
3.1 KiB
Markdown
+++
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date = 2012-03-02T00:00:00+00:00
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title = "BeagleBone playing media"
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tags = ["embedded"]
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+++
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I have a XITEL MD-PORT AN1 USB Audio adapter. It sounds quite good. Can
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I hook it to my BeagleBone and use it as a remote audio player?
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On Precise I
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see:
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[33777.196130] usb 6-2: new full-speed USB device number 6 using uhci_hcd
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[33777.475281] input: XITEL MD-PORT AN1 as \
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/devices/pci0000:00/0000:00:1d.0/usb6/6-2/6-2:1.2/input/input17
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[33777.475522] generic-usb 0003:09EF:0101.0006: input,hidraw0: \
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USB HID v1.00 Device [XITEL MD-PORT AN1] on usb-0000:00:1d.0-2/input2
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The new nodes under /dev are:
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- /dev/bus/usb/006/006
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- /dev/char/116:7
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- /dev/char/116:8
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- /dev/char/13:68
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- /dev/char/189:645
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- /dev/char/250:0
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- /dev/hidraw0
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- /dev/input/by-id/usb-XITEL\_MD-PORT\_AN1\_XA292-event-if02
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- /dev/input/by-path/pci-0000:00:1d.0-usb-0:2:1.2-event
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- /dev/input/event4
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- /dev/snd/by-id
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- /dev/snd/by-id/usb-XITEL\_MD-PORT\_AN1\_XA292-00
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- /dev/snd/by-path/pci-0000:00:1d.0-usb-0:2:1.0
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- /dev/snd/controlC1
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- /dev/snd/pcmC1D0p
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- /dev/vboxusb/006/006
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The new input device is interesting. Windows automatically changes to
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the port when a headphone jack is plugged in - I wonder if the input
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fires on insert/remove?
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On the bone I see:
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- /dev/bus/usb/001/002
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- /dev/char/116:0
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- /dev/char/116:16
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- /dev/char/13:64
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- /dev/char/189:1
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- /dev/input/by-id
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- /dev/input/by-id/usb-XITEL\_MD-PORT\_AN1\_XA292-event-if02
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- /dev/input/by-path
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- /dev/input/by-path/platform-musb-hdrc.1-usb-0:1:1.2-event
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- /dev/input/event0
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- /dev/snd/by-id
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- /dev/snd/by-id/usb-XITEL\_MD-PORT\_AN1\_XA292-00
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- /dev/snd/by-path
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- /dev/snd/by-path/platform-musb-hdrc.1-usb-0:1:1.0
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- /dev/snd/controlC0
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- /dev/snd/pcmC0D0p
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- /dev/usbdev1.2
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So that's good\!
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Use mpg321 and madplay as tests. Using Linaro, so `apt-get install`
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them. Need alsa-utils for the Alsa support.
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Audio is terrible - choppy. kworker/0:1 sits at 95 % CPU. Can't set
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snd-usb-audio nrpacks as it's compiled in.
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0006-usb-musb-cppi41\_dma-Check-if-scheduling-is-required-.patch may fix
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this. Build Angstrom and see.
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Still fails with
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uImage-3.1-r2l+gitr1d84d8853fa30cf3db2571a5aec572accca4e29d-beaglebone-20120127084313.bin.
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Try PIO only? Might be that the patch works fine for high speed devices
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but spends too much time spinning on others.
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## New kernel
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It's a confusing OpenEmbedded recipe based setup.
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Kernel is at git://arago-project.org/git/projects/linux-am33x.git
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meta-ti layer is at
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git://git.angstrom-distribution.org/meta-texasinstruments
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The recipe is
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[linux-ti33x-psp\_3.2](http://git.angstrom-distribution.org/cgi-bin/cgit.cgi/meta-texasinstruments/tree/recipes-kernel/linux/linux-ti33x-psp_3.2.bb)
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and will be out of date when you read this :)
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The config is under
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recipes-kernel/linux/linux-ti33x-psp-3.2/beaglebone/defconfig.
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There's a large patch list on top of the kernel. I hacked a script to
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apply the patches on top of the Git tree.
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Install the modules using `make modules_install
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INSTALL_MOD_PATH=/media/rootfs`
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## Playback
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vlc looks viable. Run against local files and use a/any VLC remote to
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control.
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DNLA seems pretty dire.
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