I am working on my first USB/PIC project.  I have the PICDEM FSUSB demo
board and have also built my own PCB.  I am trying to get the
keyboard/mouse demo from microchip working.  This is the one that moves
the mouse in a circle while sending "abcd" continuously.  It works on
the demo board but not on mine.  I downloaded USBview and it tells me
that my PCB is a low speed HID, while the same firmware on the demo
board is properly recognized as a full speed HID.  I have checked with a
voltmeter to see that the pullup is on the D+ line in both cases.  My
project uses the 18F2455.  I have put the schematics online on my TWiki:

http://www.diy-efi.org/twiki/bin/view.pl/Gmecm/UsbVpw

There are a few bugs in this schematic which have been noted in the
notes and fixed on my PCB.

I ran USBview with both my board and the demo board connected and got
somewhat different results:

not working demo                      working demo  
---------------------------------------------------------------
Device Descriptor:                    Device Descriptor: 
bcdUSB: 0x0200                        bcdUSB: 0x0200 
bDeviceClass: 0x00                    bDeviceClass: 0x00 
bDeviceSubClass: 0x00                 bDeviceSubClass: 0x00 
bDeviceProtocol: 0x00                 bDeviceProtocol: 0x00 
bMaxPacketSize0: 0x08 (8)             bMaxPacketSize0: 0x08 (8) 
idVendor: 0x08DA                      idVendor: 0x08DA 
idProduct: 0xFF0C                     idProduct: 0xFF0C 
bcdDevice: 0x0001                     bcdDevice: 0x0001 
iManufacturer: 0x01                   iManufacturer: 0x01 
iProduct: 0x02                        iProduct: 0x02 
iSerialNumber: 0x00                   iSerialNumber: 0x00 
bNumConfigurations: 0x01              bNumConfigurations: 0x01 
ConnectionStatus: DeviceConnected     ConnectionStatus: DeviceConnected 
Current Config Value: 0x00            Current Config Value: 0x01 
Device Bus Speed: Low                 Device Bus Speed: Full 
Device Address: 0x00                  Device Address: 0x01 
Open Pipes: 0                         Open Pipes: 1 

I also posted to the microchip forum about this and got some
suggestions, but I haven't found the problem yet.

http://forum.microchip.com/tm.aspx?m=185797

thanks for suggestions on how I can get this enumeration to work
correctly,

--steve

-------------------
Steve Ravet
ARM
steve.ravet@arm.com

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