USBDemo, something to learn USB a little bit

[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.

[hyilmaz]

this is my scheme. i tried it using 20MHZ and 15pF caps. what is wrong with it?

[UnaKRon]

First thing I do when I'm having trouble is either hook up some Status LEDs or a Serial output to debug the pic. I've had trouble with a program or two..and more than once something was causing a reset. Do you have a compiler so you can add in some debugging code?

I believe i did 22pf with my 20mhz...which is more than required by the datasheet. :/ I'm not seeing anything right off :/
Have you verified the usb cable is providing power and works with another device?

[hyilmaz]

i use pic programmer's usb cable. cable works. can anyone send me a simple pcb layout of a working usb project and hex file. i want to improve myself about pic and usb but i couldn't get result for weeks. thanks

[mister_e]

How do you dump the .hex file into your PIC, i mean how do you program your PIC?

Are you sure your device programmer software program the configuration fuses properly?

Those .HEX files providen here are there since 6 years or so, they're working.

[dhouston]

Could this be adapted to http://www.sureelectronics.net/goods.php?id=1140

[Dwayne]

Hello Steve and Darrel,

You mangy old farts, how are you all doing? Looks like all as been well for both of you. Its been a while since we have chatted.

PIC's working ok? Haven't done any programming for a number of years on those chips. I probably should get back into them.

Dwayne