usb - device not recognised

[mpardinho]

my code, create by easyhid

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".

[Dave]

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

[mister_e]

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...

    __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

Enjoy!