you'd need a usb host on the board to interface with the micro, power to run
the cam from the board... you may be better ripping a cheap cam apart and
pulling a direct video output before the usb out (if possible)
Better just to buy one of the cameras with a video output.
Key thing about USB, is that it is designed to make the 'slave' device
relatively easy to produce. The 'host' device, requires a _lot_ more
hardware and code. It is possible to produce a basic host, but you are
looking at perhaps 5 to 10* as much work as producing a direct video
About as well as you could pull a 20-ton cargo trailer up a hill using
a bicycle. You need a USB host for that, which needs between one and
two orders of magnitude more CPU power than what you're envisioning.
Hans-Bernhard Broeker ( firstname.lastname@example.org)
Even if all the snow were burnt, ashes would remain.
Go with an older type serial cam or get a camucam2 or avr cam
http://home.teleport.ch/idobson/ using bascom avr
USB is a master-slave system. Camera is a slave, so you need a master (USB
host). Low-end micros with USB are USB slaves too.
You need a USB host. It is either built into the higher-end processors or
you need external chip. But this is only half a problem. Then you need USB
host stack, typically found in larger OS, like Linux.
I'm solving this problem with a Linksys NSLU2 (Network storage system).
This device has one ethernet port, two USB host, and 1.5 serial ports.
You can load a version of Linux on it that will handle a webcam.
I am planning on preporoccesing the image there and then passing on
the relevent information to my main processor.
D. Jay Newman
Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here.
All logos and trade names are the property of their respective owners.