User manual

Windows Embedded CE 6.0 R2 NCP linux-2.6.24
3. Umount the SD card.
[root@OMAP3EVM /]# umount /mnt
3.2 3.12 Test on buzzer
1. Enable the buzzer:
[root@OMAP3EVM /]# echo 1 > /sys/class/misc/beep/val
2. Off the buzzer:
[root@OMAP3EVM /]# echo 0 > /sys/class/misc/beep/val
3.2 3.13 Test on AUDIO
The board has audio input and output interface, and we have alsa-utils audio test tools in the
filesystem, users can enter the following commands for a test:
1. Recording Test：
[root@OMAP3EVM /]# arecord -t wav -c 2 -r 44100 -f S16_LE -v k
Recording WAVE 'k' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
Plug PCM: Hardware PCM card 0 'omap3evm' device 0 subdevice 0
Its setup is:
stream : CAPTURE
access : RW_INTERLEAVED
format : S16_LE
subformat : STD
channels : 2
rate : 44100
exact rate : 44100 (44100/1)
msbits : 16
buffer_size : 22052
period_size : 5513
period_time : 125011
tstamp_mode : NONE
period_step : 1
avail_min : 5513
period_event : 0
start_threshold : 1
stop_threshold : 22052
silence_threshold: 0
silence_size : 0
boundary : 1445199872
appl_ptr : 0
hw_ptr : 0
Press CONTROL+C to quit the test.