Monthly Archives: February 2015

VoCam264: Now It WORKS :)

VoCam264 is only 12.5mm x 12.5mm x ?? standard USB h264 720p HD camera. Now it works!

春节快乐!It is Chinese New Year recently, I did not get a chance update this blog 😀

Finally make the first version work normal.

Here is the ugly one :) Thanks to my jump-wire skill learned from developing VoCore.

IMG_0373

 

The little one is a hot nuke when I connect it to USB, h264 encode is always hot. So release version will have a heat sink by default. I connect 12mm x 12mm x 3mm heat sink, works well, lower its temperature to about 42C, peace to use it.

Screen Shot 2015-02-23 at 22.46.39

 

I think this little heat sink is also good for VoCore RT5350, not cost much, about 5~8 cent.

I can not get its power consume due to if I did not connect USB D+/D-, it will go to standby mode by default, standby mode power consume should be lower than 5mA/5V.(it is 0.00A on my amperemeter) From its temperature, I guess its power consume is about 100mA ~ 150mA(0.6watt) when full speed working.

Now I should find a good lens for it. The CMOS chip is OV9712, any idea about good lens for it?(please email me,at,vonger.cn)

VoCore: AirPort with USB Sound Card

IMG_0292

Important: DO NOT buy such USB sound card like mine, it can not work. From Jeremy, USB sound card with CM108 chip works normal.

Call make menuconfig, select
Kernel modules –> Sound Support –> kmod-sound-core, mod-usb-audio
Kernel modules –> USB Support –> kmod-usb-core, kmod-usb-ohci, kmod-usb2
Utilities –> alsa-utils
Multimedia –> shairport

First, to make it compile smoothly, we must install perl XML::Parser or openwrt will complain “checking for XML::Parser… configure: error: XML::Parser perl module is required for intltool”.

perl -MCPAN -e shell

this part, press return/enter until CPAN shows its command line.

But this XML::Parser library can not install on my MAC, it can not pass its test, so we have to call install without test, use “force install”.

In CPAN command line, call this command.

force install XML::Parser

Finally call make V=s.

Now if everything moves smoothly, you will get the system upgrade file, scp it to your VoCore or other openwrt device, call mtd -e firmware write xxxxxxx.bin to cover your old firmware.

Plugin the USB sound card, call shairport -a VoCoreAIR

My Mac find it successfully:
Screen Shot 2015-02-14 at 11.09.53

but unfortunately, my side get the following error, :(

ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4259:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4259:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4259:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4738:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM default
FATAL: Alsa initialization failed: unable to open pcm device: No such file or directory

Shutting down...

I think the sound card is not correctly supported…so the app can not find interface of the card.
(if the USB sound card works, it will light a red LED)
If you have any idea(I removed the register on this blog due to too much spam here :) ), please mail me/at/vonger.cn .

Special thanks to Alex Tsai provide the install instruction of shairport.

It is openwrt truck issue :) Once change to 14.07, everything works normal, Jeremy solution is perfect, works well.

http://www.hackster.io/nzlamb/vocore-airplay-server