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few questions about USB device

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Kz9

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Hello everyone,

I want to desgin a device that communicates with the computer via the USB port. more like a "hello world" project.

I know I need a microcontroller; but is it any microcontroller that just need some code written to it, or it must has a USB interface?

And about the D+ and D- data wires in the USB, which one carries data to the device and which to the computer?

Thanks in advance.
Kz9
 

you must have an usb interface for the microcntroller.

some controllers have them built-in and some requires externally to be connected.

the D+ and D- lines are data lines .
they carry the data , whether its from or to the PC.


srizbf
5thjune2010
 

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    Kz9

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thanks, srizbf.

can you please recommend a microcontroller that has the usb feature.

Kz9
 

Many Microchip PIC devices has built in USB peripheral. One PIC micro controller that I used recently is PIC18F14K50. This is a low cost controller that supports USB. You can download Microchip USB stack and sample firmware for free from https://www.microchip.com/usb. It took less than 30 minutes for me to get my "Hello world" application up running.
 

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    Kz9

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You can see the specs of every microcontroller at the manufacturer site, just read the datasheets! ;) One pic i used few days ago was 18F2550.
 

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    Kz9

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thanks for the replies ;)
 

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