USB and PIC18F2455/2550/4455/4550

AK · Joined: 20 Apr 2004 Posts: 33

I was wondering if anyone has used the PIC18F2455/2550/4455/4550 chips with the CCS Compiler. I believe the only one listed as being supported by the compiler is the PIC18F4550. What I really want to know is: has anyone used the USB Peripheral of this chip? I would love to view some examples if possible. Thanks for the help.

daveroll · Guest

it's not released yet. microchip may have set their prime customers samples but the public has'nt got them yet

AK · Joined: 20 Apr 2004 Posts: 33

Thanks, here is what Microchip Support told me:

The 18Fxx50 USB family is expect to be at general sampling by late December 04; however, I suggest verifying with the local Microchip sales office for confirmation.

18Fxx50 will be supported by a Picstart Plus with the a Flash upgrade module at the time of full production release.

AK · Joined: 20 Apr 2004 Posts: 33

I just wanted to let everyone know that the new PICs that are USB 2.0 enabled (18Fxx50) are now available for sampling at microchip.com and they are also available for purchase at mouser.com.

Guest · Posted: Tue Jan 04, 2005 2:22 pm

Now if someone woud just write CCS fw for a USB bootloader / HID device, everything would be perfect! ;)

alexz · Joined: 17 Sep 2004 Posts: 133 Location: UK

Are they good?

Can we write in CCS? or C18 only?
_________________
Alex

bertronicom · Posted: Mon Jan 24, 2005 12:32 pm

I've checked in my CCS version 3.212 and devices 18f4550, 4455, 2550, and 2455 are availables.

The question is, What about USB CDC firmware? and .inf files?

hillcraft · Posted: Mon Jan 24, 2005 1:59 pm

I have used an 18F4550 with CCS. I had some problems with the ICD but tech supported sorted them out.

I still have a problem with the USB 2. I built a veroboard rig that emulates the Picdem FS board. I got the board to enumerate once. I am sure that I have a hardware problem but I have been unable to solve it. I have tried 2 different 18F4550's but they react the same.

Be careful of the 18F4550, there are some strange changes compared with the 18F458. Some I2C pins have been shifted and one of the RC io pins is used only for USB.

alexz · Joined: 17 Sep 2004 Posts: 133 Location: UK

I am using the PIC16F877A and the USBN9603 USB controller of National.
Is it worth to migrate to the PIC184550 instead of those two?
_________________
Alex

bertronicom · Posted: Tue Jan 25, 2005 4:16 am

I've used PIC18 & FTDI driver in order to send/receive USB data. I think with newest chips from microchip you don't need nothing more to USB implementation,

less devices + less layout + less connections = less money = less bugs

alexz · Joined: 17 Sep 2004 Posts: 133 Location: UK

bertronicom · Posted: Fri Feb 04, 2005 11:54 am

I've just received 2 samples from Microchip,

Do I need work directly with register?
Are There any CCS function to USB control and USB Tx/Rx data?
What about PC, how I can find the Usb drivers?

Thanks

Mark · Joined: 07 Sep 2003 Posts: 2838 Location: Atlanta, GA

lferrari · Joined: 02 Jun 2004 Posts: 7 Location: WM

Hi Guys,

I have updated my CCS and now I've got a sample (PIC18F2455) and the big question is how difficult is it to convert from USB 1.0 (16C745) to a 2.0, I went though the ccs sample ext_usb_hid.c and the pic's map are different, registers as well, like in pic_usb.h, does someone know if it's only these registers that has to be changed or if it's more complex.
If someone has got any code already done is there any chance they could forward it to me please.