73 lines
No EOL
2.2 KiB
Markdown
73 lines
No EOL
2.2 KiB
Markdown
#seeed-voicecard
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Firstly, get an updated kernel 4.9 :
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```
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sudo apt update
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sudo apt dist-upgrade
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sudo apt install git rpi-update bc dkms
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sudo BRANCH=next rpi-update
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sudo reboot
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```
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Install matching kernel header files(come from https://www.raspberrypi.org/forums/):
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eg. Get your kernel verson "uname -r", then
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```
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wget https://www.niksula.hut.fi/~mhiienka/Rpi/linux-headers-rpi/linux-headers-4.9.13-v7%2B_4.9.13-v7%2B-2_armhf.deb
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```
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Next, while the upstream wm8960 codec is not currently supported by current Pi kernel builds, upstream wm8960 has some bugs, we had fixed it. we must it build manually.
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Get the seeed voice card source code.
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```
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git clone http://git.oschina.net/seeed-se/seeed-voicecard
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cd seeed-voicecard
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sudo make all install
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```
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Next, copy then voice card overlay to boot dir, then apply it.
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```
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sudo cp seeed-voicecard.dtbo /boot/overlays
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sudo reboot
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sudo modprobe wm8960
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sudo dtoverlay seeed-voicecard
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```
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Load the driver default.
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```
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echo 'wm8960' | sudo tee --append /etc/modules > /dev/null
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```
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Invoke usage by adding this to /boot/config.txt:
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dtoverlay=seeed-voicecard
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Check that the sound card name matches the source code seeed-voicecard.
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```
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pi@raspberrypi:~/seeed-voicecard$ aplay -l
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**** List of PLAYBACK Hardware Devices ****
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card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
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Subdevices: 8/8
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Subdevice #0: subdevice #0
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Subdevice #1: subdevice #1
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Subdevice #2: subdevice #2
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Subdevice #3: subdevice #3
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Subdevice #4: subdevice #4
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Subdevice #5: subdevice #5
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Subdevice #6: subdevice #6
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Subdevice #7: subdevice #7
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card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
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Subdevices: 1/1
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Subdevice #0: subdevice #0
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card 1: seeedvoicecard [seeed-voicecard], device 0: bcm2835-i2s-wm8960-hifi wm8960-hifi-0 []
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Subdevices: 1/1
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Subdevice #0: subdevice #0
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pi@raspberrypi:~/seeed-voicecard$
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```
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Next apply the alsa controls setting
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```
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sudo alsactl --file ./asound.state restore
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```
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If you want to change the alsa settings, You can use "sudo alsactl --file ./asound.state store 1" to save it.
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Test:
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```
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arecord -f cd -Dhw:1 | aplay -Dhw:1
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```
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Enjoy ! |