Help on lCD and PIC18F4550 setup

[jellis00]

tacbanon,
Not sure why you want to run at 48 MHz clock rate, but here is a routine that I have used at 8 MHz on a 18F4550 (and I know it works) on my EasyPic6 with PBP v2.6.

'****************************************************************
'*  Name    : EasyPic_18F4550_DisplayDemo.pbp                  *
'*  Author  : John R. Ellis                                     *
'*  Date    : 11/28/2009                                        *
'*  Version : 1.0                                               *
'*  Notes   : Setup is for use on EasyPic6 development board    *
'*          :                                                   *
'*  Device  : 18F4550 installed in EasyPic6                     *
'*  Memory  : 408 bytes of Program Memory required              * 
'*  Ref:    :                                                   *
'****************************************************************
Define OSC 8
;--- if you un-comment these, you must comment the ones in the .inc file--
ASM ; 18F2550/4550, 8mhz crystal
   __CONFIG    _CONFIG1L, _PLLDIV_2_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
   __CONFIG    _CONFIG1H, _FOSC_HSPLL_HS_1H
   __CONFIG    _CONFIG2L, _PWRT_ON_2L & _BOR_OFF_2L & _VREGEN_ON_2L
   __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H
   __CONFIG    _CONFIG3H, _PBADEN_OFF_3H ; PortB resets as digital
   __CONFIG    _CONFIG4L, _LVP_OFF_4L & _XINST_OFF_4L
ENDASM
INCLUDE "ALLDIGITAL.pbp"    ' Sets all registers for digital ops.
                            ' User must make sure the AllDigital.pbp file 
                            ' is in same directory location as this source
                            ' code before compiling.
    'DEFINE SHOWDIGITAL 1     ' When uncommented will show analog settings
                            ' in Assembler Results window.                        
    ' A/D & Comparators disabled for digital ops
        ' All of these statements should be commented out when using the
        ' INCLUDE "AllDigital.pbp" statement to set digital ops.
            'ADCON1 = %00001111
            'CMCON = 7
' Initialize Hardware 
' ------------------- 
    TRISA =%00000000 
    TRISB =%00000000 
    TRISC =%00000000 
    TRISD =%00000000 
    TRISE.0 = 0
    TRISE.1 = 0
    TRISE.2 = 0
    INTCON2.7 = 0
    
    '** DEFINE LCD Control Constants ** 
'====================================
    L       CON 254           ' Control Byte ($FE) 
    Clr     CON 1             ' Clear the display 
    Line1   CON 128           ' Point to beginning of line 1 ($80) 
    Line2   CON 192           ' Point to beginning of line 2 ($C0) 
    
' LCD DEFINES FOR USE WIH 2x16 LCD INSTALLED IN EASYPIC6
'=======================================================
    DEFINE LCD_DREG PORTB       ' Use PortB for LCD Data
    DEFINE LCD_DBIT 0           ' Use lower(4) 4 bits of PortB
                                ' PORTB.0 thru PORTB.3 connects to
                                ' LCD DB4 thru LCD DB-7 respectively
    DEFINE LCD_RSREG PORTB      ' PORTB for RegisterSelect (RS) bit
    DEFINE LCD_RSBIT 4          ' PORTB.4 pin for LCD's RS line
    DEFINE LCD_EREG PORTB       ' PORTB for Enable (E) bit
    DEFINE LCD_EBIT 5           ' PORTB.5 pin for LCD's E line
    DEFINE LCD_BITS 4           ' Using 4-bit bus
    DEFINE LCD_LINES 2          ' Using 2 line Display
    DEFINE LCD_COMMANDUS 2000   ' Command Delay (uS)
    DEFINE LCD_DATAUS 200       ' Data Delay (uS)
'Main Loop
'=========
Main:
    Pause 1000                          ' Delay to let LCD start up 
    LCDOut L,CLR:Pause 50               ' Clear Display
    LCDOut L,Line1+2," TEST "           ' Display "TEST" on 1st line
    PAUSE 500
    LCDOut L,Line2+2,"..Power On.. !!"  ' Display "Power on" on 2nd line
    PAUSE 10000
    Goto Main                           ' Continue loop

[mister_e]

tacbanon,
Not sure why you want to run at 48 MHz clock rate,

probably to use the USB... just an idea.

To run @48MHz using a 4MHZ crystal, add those line at the top of your code. It's a copy/paste from my USBDemo

    '
    '   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 & _ICPRT_OFF_4L  & _XINST_OFF_4L & _DEBUG_OFF_4L 
    endasm
    DEFINE OSC 48

now check the datasheet for the complete Config Fuse explanation. The OIscillator block on this one is not so simple.

[tacbanon]

Hi everyone, sorry for the late reply. I got it working now, of course with the help of mister_e's suggestion...thanks steve