MaaXBoard-Nano-Linux-Yocto-Lite-UM-V1.0
http://www.embest-tech.com
20
Event: time 1597392253.449259, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 1024
Event: time 1597392253.449259, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 1
Event: time 1597392253.449259, -------------- SYN_REPORT ------------
Event: time 1597392253.515228, type 3 (EV_ABS), code 57 (ABS_MT_TRACKING_ID), value -1
Event: time 1597392253.515228, type 3 (EV_ABS), code 58 (ABS_MT_PRESSURE), value 0
Event: time 1597392253.515228, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 0
Event: time 1597392253.515228, -------------- SYN_REPORT ------------
3.5 Audio
MaaXBoard Nano support on-board audio output interface, 4 on-board MIC, USB audio device and
Bluetooth audio device.
3.5.1 Check Device ID
Before use audio device to play or record, you need to check the device id.
The on-board audio output interface, on-board MIC and USB audio device could use
arecord -l
and
aplay -l
to check the device ID.
In default, you will see the following device:
root@maaxboard-nano:~# arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: imxaudiomicfil [imx-audio-micfil], device 0: micfil hifi snd-soc-dummy-dai-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
root@maaxboard-nano:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: cs4344audio [cs4344-audio], device 0: HiFi cs4344-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: cs4344audio [cs4344-audio], device 1: HiFi-ASRC-FE (*) []
Subdevices: 1/1
Subdevice #0: subdevice #0
3.5.1.1 On-board Audio Output Interface
The audio output interface J9 is the default audio output device of MaaXBoard Nano. Connect the audio
device such as 3.5mm headset to J9 to use it. Use command
aplay -l
to check that the device id is 0,
device name is cs4344audio.