HID USB Multimedia Keypad

[pmacleod]

Ok now that that is worked out its time to move on to next stage, adding a standard HID or CDC interface to access the PIC from a PC/Mac.

Is it possible to combine a second interface to the same device?

[mister_e]

I would say yes, but how to... hell I don't know.

What I would suggest, is to develop a pure HID device, from there you develop a Driver. This driver (or standalone application) will take care of sending the keystrokes and perform other tasks.

MIDI devices use 2 Generic Classes, MIDI Device and Audio Composite, but it is still considered as a single device...

[pmacleod]

Sounds good but I need this to be universal meaning must work with Mac and Linux as well as PC. Standalone app with custom driver would not work in this case.

[mackrackit]

Standalone app with custom driver would not work in this case.

Depends on what you write it in...

[pmacleod]

Would it be difficult to do the USB Service with an interrupt routine instead of in the main loop?

[mackrackit]

ISR is the way to go. Here is a project using DT's Instants.
http://www.picbasic.co.uk/forum/cont...USB-SD-LOGGING
Darrel gave us another USB service routine also, but it seems to work best as a stand alone ISR. That is why I like using the Instant approach.
But you can take a look at the other here.
http://www.picbasic.co.uk/forum/show...8306#post78306

[pmacleod]

Thanks again for the help.

I put the code you sugested in but I keep getting an error saying Syntax Error for

UIE = $7F 'ENABLE USB INTERRUPTS

I am using Picbasic Pro 2.47