ex_usb_keyboard

art · Joined: 21 May 2015 Posts: 181

Hi,

I'm trying to learn about ex_usb_keyboard example. My problem is I do not have National 960x hardware. Is there is any other way that I can learn it without using National 960x hardware ?

Actually what is National 960x hardware? how does it look like ?
Can I build it by myself?

Please help me.

Ttelmah · Joined: 11 Mar 2010 Posts: 19222

National 960x, is the 'else' in the build for this. Only used if you _don't_
have a USB PIC16, PIC18, or PIC24.
The USBN9602, 3 or 4, is a complete USB interface, allowing USB to be
handled on PIC's that don't support USB directly.

art · Joined: 21 May 2015 Posts: 181

Oooo..i see. I'm going to use PIC18F4550 to test this example.

Thank you Ttelmah.

Ttelmah · Joined: 11 Mar 2010 Posts: 19222

Good.

If you are not using the demo board, when you get ready to build for the chip,
post up your details (crystal etc.), and we can tell you the fuse settings
needed (the fuse settings for the 4550, are quite complex...).
Remember you need a crystal that is 4MHz, 8MHz, 12MHz, 16MHz, 20MHz or
24MHz, for full speed USB, and on this chip USB cannot be done without
a crystal.

Well done actually for trying to understand the code 'first'.