So far any projects I have worked on, that communicate to a PC, do so through RS232. I would like to use USB instead but I don't know where to start.

Do they make a simple USB chip like they have UARTS for serial?

I've also heard of using PIC micro-controllers to communicate via USB. I have only worked with 16Fxx series PICs, would those work?

Thanks.

 

It's called an FT232R or if you want a PIC the 18F2550 is a popular choice.

 

Specifications are here
http://www.usb.org/home

Low cost USB analyzer is here
http://www.totalphase.com/products/beagle_usb12/

Knock yourself out!

 

Another alternative: Stick with your regular PIC devices and modify a $2.68 (including shipping) Chinese clone Nokia CA-42 usb-to-serial adapter cable.

You can't access the USB 5v signal through it but it does make a nice inexpensive interface without adding all of the USB code overhead to your projects.

I even use it for serial USB access with bit-banged serial drivers on little 10F' and 12F' projects.

 

Specifications are here
http://www.usb.org/home

Low cost USB analyzer is here
http://www.totalphase.com/products/beagle_usb12/

Knock yourself out!

Haha, 400 bucks low cost USB analyzer... I'd hate to see the expensive ones.

I wonder why there isn't one that is all software based, I mean couldn't they make WireShark for USB?

 

Lots of USB analyzer software out there.
http://www.usblyzer.com/
Also Jan Axelson's USB complete book would be a must read.

 

Haha, 400 bucks low cost USB analyzer... I'd hate to see the expensive ones.

I wonder why there isn't one that is all software based, I mean couldn't they make WireShark for USB?

Well the expensive ones from LeCroy cost several thousands. Believe me, when you're trying to figure out why your device won't get past enumeration $400.00 is nuthin'. The software ones don't present the information in the most understandable way.

I second the recommendation on Jan Axelson's books.

 

I've had good success with a MAX3421, a port sniffer, and careful monitoring of the status port.

There are a number of USB class protocols. My suggestion would be to pick one and learn it thoroughly.