PIC16F1454/5/9 USB example

On a sunny day (Fri, 23 Oct 2015 12:07:51 -0700 (PDT)) it happened Sonnich Jensen wrote in :

I circumvent that problem by using serial to USB modules, and just use RS232. That also takes care of USB licensing:

Now any terminal program can work with it, and you have 5V power for your PIC too, as well as 3.3V. And a cheapr PIC (no USB).

For 99 cents....

Best bet is to download the Microchip Library of Applications (MLA) and find the help_mla_usb.pdf file to read about the USB framework and functions. There are demos for CDC and USB-Serial applications, designed for their low pin count USB demo board which has the PIC18F14K50 but can be used with the PIC16F145x. The board is $40 but has only a few parts so you could easily make your own:

Data Sheet with schematic:

I have implemented USB on my own ORTM-4H product, using the PIC18F2550, but I had to use the older USB stack and the C18 compiler (and perhaps also the

There is also a lot of information on the Microchip forum where I (and others) discussed the problems.

Paul

Maybe this will help?

It's supposed to be a software-only implementation of USB.

You may also look around the web for 'Igor ?e?ko' who apparently inspired people to write these software-only implementations and perhaps 'V-USB' whose homesite has a page full of links. One of those links is the above code.google.com one.