PIC USB device supported by CCS

benoitstjean · Posted: Fri Sep 11, 2020 8:04 am

CCS version: 5.026

Hi guys,

Its been a little while.

Won't go into many details but I need a PIC MCU - that is supported by my CCS version - that has a USB host controller on it so that I can program the MCU to act like if it was a PC so that I can tie a USB key to it (and do data transfer).

Worst case scenario, I will use a PIC24 and an external USB host chip. I'm going through the Microchip website but I have to familiarize myself with the USB terminology as I've never attempted what I am attempting to accomplish. I think this is what I need though - a PIC with USB host.

I've used the FTDI232RQ tie to a PIC's UART but this FTDI is seen by my PC as a virtual COM port... now, I want to do the opposite: I want the PIC USB to 'act' like it was the PC...

Any suggestions?

Thanks!

Ben
Ottawa, Canada

Ttelmah · Joined: 11 Mar 2010 Posts: 19559

USB hosts on devices like the PIC, can't be 'generic'. You can do a host to
control a storage device, or one to support a keyboard/mouse etc.. Or
one to control a CDC device etc. etc..
Each needs a separate stack implementation.
CCS has not translated the MicroChip implementation of this, but these
can be compiled and used. However be prepared for them to be quite
nastily 'fussy' about the devices they will accept. The amount of error
checking and recovery in the PC stack, and just how many devices it
supports, is not something you are going to get from a PIC.

benoitstjean · Posted: Fri Sep 11, 2020 8:34 am

hmmm... so then if I was to use a standalone USB IC that will be controlled by a PIC24EP, any suggestion?

Thanks again,

Ben

newguy · Joined: 24 Jun 2004 Posts: 1911

FTDI Vinculum. Single chip USB host which can be accessed via serial by a relatively low power PIC.

dluu13 · Joined: 28 Sep 2018 Posts: 395 Location: Toronto, ON

benoitstjean · Posted: Mon Sep 14, 2020 12:20 pm

Hi guys,

Thanks all for your suggestions. I did a bit of searching after posting and also figured-out that the VNC2 from FTDI would probably suit me well.

Thanks and have a greatd day!

Ben

temtronic · Posted: Mon Sep 14, 2020 12:24 pm

VNC2... pretty sure I have 2 of them and the 'programmer interface' module here, collecting dust. i KNOW I bought them from Digikey, sigh, years ago....
'magically', 'somehow' I got it to get a PIC to go between a PC and a USB flashdrive...
yeesh, that's seems like 'decades' ago.....

Jay