SED1335 320x240 graphic LCD

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  1. - 28th May 2006, 18:14 #2
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    Demon
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    Default Digital potentiometer

    This is the code and circuitry to control the contrast and backlight via the PIC:

    CLEAR
    ADCON1 = 7

    ASM
    @ DEVICE PIC16F877, HS_OSC, WDT_OFF, PWRT_ON, BOD_ON, LVP_OFF, CPD_OFF,
    WRT_OFF, DEBUG_OFF, PROTECT_OFF
    ENDASM

    DEFINE OSC 20

    varContrast VAR BYTE
    varBacklight VAR BYTE

    varContrast = 100
    HPWM 1,varContrast,32767

    varBacklight = 200
    HPWM 2,varBacklight,32767

    ' Here I have logic to scan 4 input buttons to increase/decrease varBacklight
    ' and varContast, then I reissue HPWM commands using new values.

    END


    Robert
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    Last edited by Demon; - 28th May 2006 at 18:43.
    My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.

    Not as dumb as yesterday, but stupider than tomorrow!
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