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Picdem2 lcd problem help

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Ilia Gildin

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hello
i have writen the following code
Code: 
;******************************************************************************
;                                                                             *
;   This file is a basic code template for code generation on the             *
;   PIC18F46K22. This file contains the basic code building blocks to build   *
;   upon.                                                                     *
;                                                                             *
;   Refer to the MPASM User's Guide for additional information on features    *
;   of the assembler.                                                         *
;                                                                             *
;   Refer to the respective data sheet for additional information on the      *
;   instruction set.                                                          *
;                                                                             *
;******************************************************************************
;                                                                             *
;    Filename:         xxx.asm                                                *
;    Date:                                                                    *
;    File Version:                                                            *
;    Author:                                                                  *
;    Company:                                                                 *
;                                                                             *
;******************************************************************************
;                                                                             *
;    Files Required:                                                          *
;                                                                             *
;******************************************************************************
;                                                                             *
;    Notes:                                                                   *
;                                                                             *
;******************************************************************************
;                                                                             *
;    Revision History:                                                        *
;                                                                             *
;******************************************************************************

;------------------------------------------------------------------------------
; PROCESSOR DECLARATION
;------------------------------------------------------------------------------

     LIST      P=PIC18F46K22          ; list directive to define processor
     #INCLUDE <P18F46K22.INC>         ; processor specific variable definitions

;------------------------------------------------------------------------------
;
; CONFIGURATION WORD SETUP
;
; The 'CONFIG' directive is used to embed the configuration word within the 
; .asm file. The lables following the directive are located in the respective 
; .inc file.  See the data sheet for additional information on configuration 
; word settings.
;
;------------------------------------------------------------------------------

     ;Setup CONFIG11H
     CONFIG  FOSC = INTIO67, PLLCFG = OFF, PRICLKEN = OFF, FCMEN = OFF, IESO = OFF
     ;Setup CONFIG2L
     CONFIG PWRTEN = OFF, BOREN = OFF, BORV = 190
     ;Setup CONFIG2H
     CONFIG WDTEN = OFF, WDTPS = 1
     ;Setup CONFIG3H
     CONFIG MCLRE = EXTMCLR, CCP2MX = PORTC1, CCP3MX = PORTE0, HFOFST = OFF, T3CMX = PORTB5, P2BMX = PORTC0
     ;Setup CONFIG4L
     CONFIG STVREN = OFF, LVP = OFF, XINST = OFF
     ;Setup CONFIG5L
     CONFIG CP0 = OFF, CP1 = OFF, CP2=OFF, CP3=OFF
     ;Setup CONFIG5H
     CONFIG CPB = OFF, CPD = OFF
     ;Setup CONFIG6L
     CONFIG WRT0 = OFF, WRT1 = OFF, WRT2 = OFF, WRT3 = OFF
     ;Setup CONFIG6H
     CONFIG WRTB = OFF, WRTC = OFF, WRTD = OFF
     ;Setup CONFIG7L
     CONFIG EBTR0 = OFF, EBTR1 = OFF, EBTR2 = OFF, EBTR3 = OFF
     ;Setup CONFIG7H
     CONFIG EBTRB = OFF

;------------------------------------------------------------------------------
;
; VARIABLE DEFINITIONS
;
; Refer to datasheet for available data memory (RAM) organization
;
;------------------------------------------------------------------------------

    CBLOCK 0x60 ; Sample GPR variable register allocations
        MYVAR1  ; user variable at address 0x60
        MYVAR2  ; user variable at address 0x61
        MYVAR3  ; user variable at address 0x62
    ENDC

W_TEMP         EQU        0x000  ; w register for context saving (ACCESS)
STATUS_TEMP    EQU        0x001  ; status used for context saving 
BSR_TEMP       EQU        0x002  ; bank select used for ISR context saving

#define LCD_RS	PORTD,RD4			; LCD RS bit
#define LCD_RW	PORTD,RD5			; LCD R/W bit
#define LCD_EN	PORTD,RD6			; LCD Enable bit

LCD_PORT	equ		PORTD			; LCD Interface PORT

;------------------------------------------------------------------------------
; EEPROM INITIALIZATION
;
; The 18F46K22 has 256 bytes of non-volatile EEPROM starting at 0xF00000
; 
;------------------------------------------------------------------------------

DATAEE    ORG  0xF00000 ; Starting address for EEPROM for 18F46K22

    DE    "MCHP"        ; Place 'M' 'C' 'H' 'P' at address 0,1,2,3

;------------------------------------------------------------------------------
; RESET VECTOR
;------------------------------------------------------------------------------

RES_VECT  ORG     0x0000            ; processor reset vector
          GOTO    START             ; go to beginning of program

;------------------------------------------------------------------------------
; HIGH PRIORITY INTERRUPT VECTOR
;------------------------------------------------------------------------------

ISRH      ORG     0x0008

          ; Run the High Priority Interrupt Service Routine
          GOTO    HIGH_ISR             

;------------------------------------------------------------------------------
; LOW PRIORITY INTERRUPT VECTOR
;------------------------------------------------------------------------------

ISRL      ORG     0x0018
          
          ; Run the High Priority Interrupt Service Routine
          GOTO    LOW_ISR             

;------------------------------------------------------------------------------
; HIGH PRIORITY INTERRUPT SERVICE ROUTINE
;------------------------------------------------------------------------------

HIGH_ISR  

          ; Insert High Priority ISR Here

          RETFIE  FAST

;------------------------------------------------------------------------------
; LOW PRIORITY INTERRUPT SERVICE ROUTINE
;------------------------------------------------------------------------------

LOW_ISR
          ; Context Saving for Low ISR
          MOVWF   W_TEMP              ; save W register
          MOVFF   STATUS, STATUS_TEMP ; save status register
          MOVFF   BSR, BSR_TEMP       ; save bankselect register

          ; Insert Low Priority ISR Here

          ; Context Saving for Low ISR
          MOVFF   BSR_TEMP, BSR       ; restore bankselect register
          MOVF    W_TEMP, W           ; restore W register
          MOVFF   STATUS_TEMP, STATUS ; restore status register
          RETFIE

;------------------------------------------------------------------------------
; MAIN PROGRAM
;------------------------------------------------------------------------------

START
	CLRF TRISD
	Clrf ANSELD
d1     EQU 0x80
d2     EQU 0x81
d3     EQU 0x82		
LCD_DATA    EQU 0x83
	BSF 	PORTD,RD7 ;power on		
	call	delay_45ms
	bSf 	LCD_EN ; enable for write to lcd
	NOP
	NOP	
	bcf 	LCD_RS
	bcf		LCD_RW
	movlw 	B'00100000';FUNCTION SET 1
	movwf 	LCD_DATA
	swapf	LCD_DATA,W
	iorwf	PORTD,F
	bcf 	LCD_EN ; enable for write to lcd	
	call	delay_5ms
	bsf 	LCD_EN ; enable for write to lcd	
	nop
	nop
	bcf 	LCD_RS
	bcf		LCD_RW
	movlw 	B'00101000';FUNCTION SET 2
	movwf	LCD_DATA
	swapf	LCD_DATA,F
	movlw 	0xF0 ;CLEAR LCD DATA
	andwf	PORTD,F
	movlw 	0x0F
	andwf	LCD_DATA,W
	iorwf	PORTD,F
	bcf 	LCD_EN ; enable for write to lcd
	call	delay_200us
	bsf 	LCD_EN ; enable for write to lcd	
	nop
	nop
	bcf 	LCD_RS
	bcf		LCD_RW
	swapf	LCD_DATA,F;entry2 continue
	movlw 	0xF0 ;CLEAR LCD DATA
	andwf	PORTD,F
	movlw 	0x0F
	andwf	LCD_DATA,W
	iorwf	PORTD,F
	bcf 	LCD_EN	; enable for write to lcd	
	call	delay_5ms
	bsf 	LCD_EN	; enable for write to lcd	
	nop
	nop
	bcf 	LCD_RS
	bcf		LCD_RW
	movlw 	B'00001110' ;display on/off
	movwf	LCD_DATA
	swapf	LCD_DATA,F
	movlw 	0xF0 ;CLEAR LCD DATA
	andwf	PORTD,F
	movlw 	0x0F
	andwf	LCD_DATA,W
	iorwf	PORTD,F
	bcf 	LCD_EN	; enable for write to lcd	
	call	delay_200us
	bsf 	LCD_EN ; enable for write to lcd	
	nop
	nop
	bcf 	LCD_RS
	bcf		LCD_RW
	swapf	LCD_DATA,f ;display on/off continue
	movlw 	0xF0 ;CLEAR LCD DATA
	andwf	PORTD,F
	movlw 	0x0F
	andwf	LCD_DATA,W
	iorwf	PORTD,F
	bcf 	LCD_EN ; enable for write to lcd	
	call	delay_5ms
	bsf 	LCD_EN ; enable for write to lcd	
	nop
	nop
	bcf 	LCD_RS
	bcf		LCD_RW
	movlw 	B'00000110' ;entry mode
	movwf	LCD_DATA
	swapf	LCD_DATA,F
	movlw 	0xF0 ;CLEAR LCD DATA
	andwf	PORTD,F
	movlw 	0x0F
	andwf	LCD_DATA,W
	iorwf	PORTD,F
	bcf 	LCD_EN ; enable for write to lcd		
	call	delay_200us
	bsf 	LCD_EN ; enable for write to lcd	
	nop
	nop
	bcf 	LCD_RS
	bcf		LCD_RW
	swapf	LCD_DATA,F ;entry mode continue
	movlw 	0xF0 ;CLEAR LCD DATA
	andwf	PORTD,F
	movlw 	0x0F
	andwf	LCD_DATA,W
	iorwf	PORTD,F
	bcf 	LCD_EN ; enable for write to lcd	
	call	delay_5ms	
;end init
;write H
	bsf 	LCD_EN
	bsf 	LCD_RS
	bcf		LCD_RW
	movlw 	B'01001000' ;A'H'
	movwf	LCD_DATA
	swapf	LCD_DATA,F
	movlw 	0xF0 ;CLEAR LCD DATA
	andwf	PORTD,F
	movlw 	0x0F
	andwf	LCD_DATA,W
	iorwf	PORTD,F
	bcf 	LCD_EN ; enable for write to lcd	
	call	delay_200us
	bsf 	LCD_EN ; enable for write to lcd	
	nop
	nop
	bsf 	LCD_RS
	bcf		LCD_RW
	swapf	LCD_DATA,F ;A'H' continue
	movlw 	0xF0 ;CLEAR LCD DATA
	andwf	PORTD,F
	movlw 	0x0F
	andwf	LCD_DATA,W
	iorwf	PORTD,F
	bcf 	LCD_EN ; enable for write to lcd	
	call	delay_5ms	
	bsf 	PORTD,RD6 ; enable for write to lcd	

delay_45ms	
	movlw D'2'
	movwf d3
op
	movlw D'9'
	movwf d2
ty
	movlw D'208'
	movwf d1
ui
	decfsz d1
	goto ui
	decfsz d2
	goto ty
	decfsz d3
	goto op
	return	

delay_5ms
	movlw D'1'
	movwf d3
op1
	movlw D'2'
	movwf d2
ty1
	movlw D'210'
	movwf d1
ui1
	decfsz d1
	goto ui1
	decfsz d2
	goto ty1
	decfsz d3
	goto op1
	return

delay_200us
	movlw D'1'
	movwf d3
op2
	movlw D'1'
	movwf d2
ty2
	movlw D'13'
	movwf d1
ui2
	decfsz d1
	goto ui2
	decfsz d2
	goto ty2
	decfsz d3
	goto op2
	return
	end
I use the PICDEM2 PLUS black board with the P18F46K22 microcontroller and unfortunately the screen blinks and does not writing 'H'
please help :)
 

milan.rajik said:
What POWER ? Are you Powering the LCD from PIC ?
Click to expand...

yes as the schematics of the picdem 2 shows the vcc pin is connected through the n-p-n transistor to RD7
again thank you very much for your help
 

For all output pins you have to use LATx and LATxbits.LATxx.
 

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