usb - device not recognised

my code, create by easyhid

Code:

---


DEFINE OSC 48         
DEFINE LOADER_USED 1

USBBufferSizeMax  con 8  ' maximum buffer size
USBBufferSizeTX    con 8  ' input
USBBufferSizeRX    con 8  ' output

' the USB buffer...
USBBuffer        Var Byte[USBBufferSizeMax]
USBBufferCount  Var Byte

' ************************************************************
' * main program loop - remember, you must keep the USB      *
' * connection alive with a call to USBService every couple  *
' * of milliseconds or so...                                *
' ************************************************************
usbinit ' initialise USB...
ProgramStart:
  gosub DoUSBIn
  gosub DoUSBOut
  goto ProgramStart 

' ************************************************************
' * receive data from the USB bus                            *
' ************************************************************
DoUSBIn:
  USBBufferCount = USBBufferSizeRX              ' RX buffer size
  USBService                                    ' keep connection alive
  USBIn 1, USBBuffer, USBBufferCount, DoUSBIn  ' read data, if available
  return
   
' ************************************************************
' * wait for USB interface to attach                        *
' ************************************************************
DoUSBOut:
  USBBufferCount = USBBufferSizeTX              ' TX buffer size
  USBService                                    ' keep connection alive
  USBOut 1, USBBuffer, USBBufferCount, DoUSBOut ' if bus available, transmit data
  return

---

i tryied cristal 20mhz or 8mhz and "device not recognised",
with 48 not detect

i tested demo program usbcdc and too "device not recognised".

mpardinho, If you are defining 48 Mhz. as your clock speed to PBP and you are using a 4X PLL then the master crystal frequency should be 4X less or 12 Mhz.

Dave Purola,
N8NTA

If you don't use Mecanique Bootloader, you don't need the DEFINE LOADER_USED 1' line.

Make sure your Vusb cap is around 0.47uf.

and then, try the following
http://www.picbasic.co.uk/forum/showthread.php?t=5418

With a 8MHZ Crystal you need to modify the config fuses to...

Code:

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    __CONFIG  _CONFIG1L, _PLLDIV_2_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L 
                            ;              ;                      ; USB clock source comes from the 96 MHz PLL divided by 2
                            ;              ; [OSC1/OSC2 Src: /1][96 MHz PLL Src: /2]
                            ; Divide by 2 (8 MHz oscillator input)


    __CONFIG    _CONFIG1H, _FOSC_HSPLL_HS_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
                            ;                  ;              ; Oscillator Switchover mode disabled
                            ;                  ; Fail-Safe Clock Monitor disabled
                            ; HS oscillator, PLL enabled, HS used by USB

    __CONFIG    _CONFIG2L, _PWRT_ON_2L & _BOR_ON_2L  & _BORV_2_2L  & _VREGEN_ON_2L 
    __CONFIG    _CONFIG2H, _WDT_OFF_2H
    __CONFIG    _CONFIG3H, _MCLRE_ON_3H & _LPT1OSC_OFF_3H & _PBADEN_OFF_3H & _CCP2MX_ON_3H
    __CONFIG    _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _ICPRT_OFF_4L  & _XINST_OFF_4L & _DEBUG_OFF_4L

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Enjoy!