USBDemo, something to learn USB a little bit

[vacpress]

powerbasic. cool... i wish i wasnt addicted to the VB language...

if vb would compile for mac like powerbasic does i would be extremely happy.. in the meantime ive downloaded so much stuff in an attempt to learn cross compatability... and never really got too far, as i havent got a mac so it is no fun..

hehe... you must use power basic cuz its free... i like .net express for the same reason!

how is the usb battle going? any luck comprehending the usbdemo code? it sure looks different from my picbasic code!

currently i am trying to find the best usb bootloader, hopefully one that has code for the PC side as who knows, I may eventually develop something marketable!

carry on
-robert

[Squibcakes]

Yeah your right it is a battle!

Couple of things.,... I am finding that jumping straight into USB with these 18F chips may be a bit ambitious.

These 18F series do seem to be a bit more complex than your average 16F chips.

Just getting my head around the config fuses and using mpasm as opposed to using PBP Compilier is mind boggling but I think I got it.

At this stage I'm just trying to get the 18F to flash the LEDs and stuff LOL!

On another note, I tried to compile Mr E's usbdemo.pbp file and I get all soughts of errors. Any idea why? I mean the hex file works, but cant I compile his pbp file. I want to make sure that I can get the basics working first.

I tried tiny bootloader which apparantly supports 18F4550 chips but couldnt get it to work yet.


Squib

[mister_e]

On another note, I tried to compile Mr E's usbdemo.pbp file and I get all soughts of errors. Any idea why? I mean the hex file works, but cant I compile his pbp file. I want to make sure that I can get the basics working first.

mmm, i suspect those usuals
1. upgrade your MPASM version
2. comment all default PBP config fuses in the 18F4550.inc file, AND if you don't have PBP 2.47, modify the LIST line to.....

        LIST p = 18F4450, r = dec, w = -311, w = -230, f = inhx32

once done, if everything is in the same directory, it MUST work!3

for the Tiny loader, i know there's some DEFINEs to add... wich? i don't know, i don't and won't use it.

[mister_e]

how is the usb battle going? any luck comprehending the usbdemo code? it sure looks different from my picbasic code!

What's not clear enough?

[Squibcakes]

HI Mr E,

Yep tried that but still get those errors BTW I have Mpasm 5.03, PBP 2.46.

Anyways after searching the posts the only thing that works is this (I think maybe one of your ideas)....

Don't use any preset fuses in the main code, and edit them manually in the .inc file. This for sure is working!!!

I have all the fuses setting in this file, and just REM out the ones I dont use.

OK after all that, I now have some simple programs working on the demo PCB at last including my serial coms!!!

Squib

[mister_e]

interesting. So i can't confirm if it's a MPASM problem (5.06 now) or a PBP V2.46 problem.

I know they fixed the config fuse problem in 2.47, but can't say if they have only edit the .INC file (LIST line) or they also change something else.

Anyways, if it's working

[Squibcakes]

Mr_E
Yeah ok well thanks for your input anyway - always welcome I'm happy to edit the the .inc file and leave it at that.

Great news! I finally got the CDC virtual comport working!!!!!!

Now I can send data via USB (virtual comport) and out of the Pic 18F4550 USART! and vice versa!

I'm stoked that this actually works!

Squib

[xxdymhbh]

Thanks for your sharing!

[Noise.be]

Thanx for share

I have a problem when I program the PIC with the version of the zip and that I makes all the connection necessary,
I connect it on the USB and Windows says to me every 3 minutes Unrecognized device

20MHz
10nF on pin 18
resistor 1k5 on pin 23 ?

what did I wrong?