2x16 LCD Module with HD44780 + 16F877A


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  1. #1


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    Code:
    @ device pic16F877A, HS_OSC
    @ device WDT_OFF
    @ device PWRT_OFF
    @ device BOD_OFF
    @ device LVP_OFF
    @ device WRT_OFF
    @ device CPD_OFF
    @ device DEBUG_OFF
    
    Define  OSC				4						' Set clock speed
    DEFINE  SER2_BITS		8						' Ser2 number of data bits
    DEFINE LCD_DREG PORTD		'LCD data port
    DEFINE LCD_DBIT 0			'LCD data starting bit 0 or 4
    DEFINE LCD_RSREG PORTC		'LCD register select port
    DEFINE LCD_RSBIT 5			'LCD register select bit
    DEFINE LCD_EREG PORTC		'LCD enable port
    DEFINE LCD_EBIT 7			'LCD enable bit
    DEFINE LCD_RWREG PORTC		'LCD read/write port
    DEFINE LCD_RWBIT 6			'LCD read/write bit
    DEFINE LCD_BITS 8			'LCD bus size 4 or 8
    DEFINE LCD_LINES 2			'Number lines on LCD
    DEFINE LCD_COMMANDUS 2000	'Command delay time in us
    DEFINE LCD_DATAUS 50		'Data delay time in us
    'Pause 1000
    
    loop:
    LCDOUT $FE, 1, 2, "INITIALISING"
    LCDOUT $FE, $C0, "Hello"
    goto loop

  2. #2


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    Found it... looks like the contrast likes to be fully negative...

    Thanks for the help... Iactualy thaught the contrast should be more positive acording to all the scmatics i looked at...

    Thanks

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