common_anode - Anobium/Great-Cow-BASIC-Help GitHub Wiki

Common Anode

This is a Common Anode 7 Segment display example.

Additional configuration is required when using Common Anode.

When setting up the 7 segment Common Anode display you MUST use the 7Seg_CommonAnode constant. You can optionally use the 7Seg_HighSide constant to support PFET or PNP high side driving of the Common Anode displays as follows:

Constant Name Controls Comment
7Seg_CommonAnode Inverts controls for Common Anode displays Required for Common Cathode displays
7Seg_HighSide Support PFET or PNP high side driving of the display Inverts Common Cathode addressing pin logic for multiplexed displays

Example:

    'A Common Anode 7 Segment display example using bs250p pfets
    'Chip model
    #chip 16f1783,8

    'support for Common Cathode
    #define 7Seg_CommonAnode

    'support for pfet or pnp high side drivers
    #define 7Seg_HighSide

    #define DISP_SEG_A PORTC.0
    #define DISP_SEG_B PORTC.1
    #define DISP_SEG_C PORTC.2
    #define DISP_SEG_D PORTC.3
    #define DISP_SEG_E PORTC.4
    #define DISP_SEG_F PORTC.5
    #define DISP_SEG_G PORTC.6
    #define DISP_SEG_DOT PORTC.7

    #define Disp_Sel_1 PortA.1
    #define Disp_Sel_2 PortA.2
    #define Disp_Sel_3 PortA.3

    dim count as word
    dim number as word

    Do Forever
      For count = 0 to 999
          number = count
          Num2 = 0
          Num3 = 0
          If number >= 100 Then
            Num3 = number / 100
            'SysCalcTempX is the remainder after a division has been completed
            number = SysCalcTempX
          End if
          If number >= 10 Then
            Num2 = number / 10
            number = SysCalcTempX
          end if
          Num1 = number
          Repeat 10
            DisplayValue 1, Num1, 1 'Optional third parameter turns on the dp on that digit
            wait 5 ms
            DisplayValue 2, Num2
            wait 5 ms
            DisplayValue 3, Num3
            wait 5 ms
           end Repeat
      Next
    Loop

Also, see 7 Degment Display Overview, DisplayChar, DisplayValue

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