USBDemo, something to learn USB a little bit

[Charlie]

Well I though I'd leverage Darrel's heavy lifting and put the USB code (including the interrupt structure) together with the SD card code and make myself basically an overly complicated and expensive thumb drive, purely for my education. It seems, however, that the includes consume more than the 2K space for variables, and after about an hour of trying to make things less generic by eliminating variables wherever possible in favor of fixed values, I still don't have enough space. I'm also not sure if I'm even getting close - is there any way to have the compiler tell you how much you are over by, rather than simply "unable to fit"?

[Demon]

Charlie,

I had a similar problem once; so I copied the Includes in the code and removed all the variables I didn't need. That worked in my particular situation.

Robert

[JBKerner]

I'm just getting my feet wet with USB. I currently have PBP (2.60C). I'd like to get some recommendations, before I get too far into this project:

1) Is there any benefit to upgrading to PBP 3.0, specifically for my USB experiments?
2) I have very little experience with VB6, but some experience with VBA (in Excel). Back on post 248, Steve said, "...VB6 being a dead duck for ages now...". I _have_ VB6, but was wondering if there was a more current alternative (other than going out and trying to learn a completely new language, like C)

Any tips would be greately appreciated!

Jeff

[gadelhas]

[QUOTE=JBKerner;112633Steve said, "...VB6 being a dead duck for ages now...". I _have_ VB6, but was wondering if there was a more current alternative (other than going out and trying to learn a completely new language, like C)
[/QUOTE]

VB.NET;

http://www.picbasic.co.uk/forum/cont...-USB-to-VB.NET

[Demon]

Jeff, read this thread:
http://www.picbasic.co.uk/forum/showthread.php?t=16234

It's exactly about this topic.

Robert

[hyilmaz]

hi,

i use USBDemo.HEX file. i send it to my PIC using USB PIC programmer (not boot loader). i use;

18f4550
4 MHZ crystal (with 22pF capacitors)
3 parallel 100nF (not polarized) capacitors on pin18
10k resistor on mclr
100nF capacitor between VCC and GND

my pc doesn't recognise the device. nothing happens when i connect PIC to my pc

what is wrong. i couldn't work it. i am workin on it for months and i am going crazy.

thanks

[UnaKRon]

...well looking back it appears you can use a 4mhz. I used a 20mhz crystal when I was able to get it working.

Do you have a schematic.