18F4550 to 18F2550

[mpardinho]

i try this code with 18F4550 and work 1000%
i change code for 18F2550 and not work, not Recognised

Resonator 4Mhz
4k7 in Mclr
470nf in Vusb
0,1nf in Vdd-Vcc

Vusb - 4550 = 3,31
Vusb - 2550 = 3,37

   '   =================
   asm
      __CONFIG    _CONFIG1L, _PLLDIV_1_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]
                               ; No prescale (4 MHz oscillator input drives PLL directly)


      __CONFIG    _CONFIG1H, _FOSC_XTPLL_XT_1H & _FCMEN_OFF_1H & _IESO_OFF_1H 
                               ;                  ;               ; Oscillator Switchover mode disabled
                               ;                  ; Fail-Safe Clock Monitor disabled
                               ; XT oscillator, PLL enabled, XT 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 
      __CONFIG    _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _XINST_OFF_4L & _DEBUG_OFF_4L 
   endasm
   
   DEFINE OSC 48          
    
    '
    '   Hardware configuration
    '   ======================    
        '
        '   I/O and PORTs
        '   -------------  
    PORTB   =   0
    PORTC   =   0
'    PORTD   =   0 ' enable for 18f4550
'    PORTE   =   0 ' enable for 18f4550
    TRISB   =   0
    TRISC   =   0
    TRISA   =   $FF
'    TRISD   =   0 ' enable for 18f4550
'    TRISE   =   0 ' enable for 18f4550

   ' USB modulo
   UCFG    var byte EXT        ' include UCFG register... Yeah Melabs didn't :o(
   ucfg    =   %00010100       ' enable internal USB pull-up, Full speed USB

   ' Interruptores
   INTCON  =   %10100000       ' Enable global and TMR0 interrupts
   T0CON   =   %10000000       ' TMR0, CLK internal, prescaler 1:2, T0ON

    '   
    '   Variables & constants definition 
    '   ================================
   I  Var Byte

   USBBufferSizeTX     con 8       ' input 
   USBBufferSizeRX     con 8       ' output

   Usb_Contador        Var Byte    '
   Usb_Dados           var byte[8] ' store ADCs & pushButton data to send to USB

   ' Constantes
   TMR0IF              VAR INTCON.2 ' TMR0 overflow int flag
   TMR0ON              VAR T0CON.7  ' TMR0 on/off bit
   TMR0IE              VAR INTCON.5 ' TMR0 interrupt enable/disable bit

   ' Macros
   goto Configura

    asm 
Reload_TMR0 macro
    BCF     _TMR0ON         ; stop timer
    MOVE?CW d'65000',TMR0L  ; reload for timebase ~100uSec
    BCF     _TMR0IF         ; clear overflow flag
    BSF     _TMR0ON         ; start timer
    ENDM
    endasm

'-------------------------------------------------------------------------------
Configura:
    pause 500
    usbinit
@   Reload_TMR0
    ON INTERRUPT GOTO Usb_Servico

'-------------------------------------------------------------------------------
Inicio:
   gosub Usb_Entrada
goto Inicio

'-------------------------------------------------------------------------------
Usb_Entrada:
   tmr0ie = 0
   Usb_Contador = USBBufferSizeRX

   USBService
   USBIn 3, Usb_Dados, Usb_Contador, Timeout
   
   GOSUB Usb_Saida
return
    
Timeout:
@   Reload_TMR0            
   tmr0ie = 1
return

'-------------------------------------------------------------------------------
Usb_Saida:
   TMR0IE = 0
   
WaitPC:
   'Usb_Contador = USBBufferSizeTX
   
   USBService
   USBOut 3, Usb_Dados, Usb_Contador, Waitpc
@   Reload_TMR0                                     
   tmr0ie = 1
return

'-------------------------------------------------------------------------------
DISABLE
Usb_Servico:
   usbservice
@   Reload_TMR0
   RESUME
ENABLE

[Kamikaze47]

for 18F2550 I use:

_CONFIG1H, _FOSC_HSPLL_HS_1H

[mister_e]

Somehow strange... i posted examples of the USBDemo that worked on the following link.
http://www.picbasic.co.uk/forum/show...8&postcount=99

the whole set of config fuses for a 4MHz crystal was

    '
    '   Pic Configuration
    '   =================
    asm
    __CONFIG    _CONFIG1L, _PLLDIV_1_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]
                            ; No prescale (4 MHz oscillator input drives PLL directly)


    __CONFIG    _CONFIG1H, _FOSC_XTPLL_XT_1H & _FCMEN_OFF_1H & _IESO_OFF_1H 
                            ;                  ;               ; Oscillator Switchover mode disabled
                            ;                  ; Fail-Safe Clock Monitor disabled
                            ; XT oscillator, PLL enabled, XT 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 & _XINST_OFF_4L & _DEBUG_OFF_4L 
    endasm
    DEFINE OSC 48

Unless i need new glasses... can i suspect some wiring or device programmer problem?