Common Cathode

This is a Common Cathode 7 Segment display example.

No additional configuration is required when using Common Cathnode.

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

This is a Common Cathode 7 Segment display example.

Example:

    'Chip model
    #chip 16f1783,8

    'Output ports for the 7-segment device
    #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

    ' This is the usage of the SEG_DOT for decimal point support
	' An optional third parameter of '1' will turn on the decimal point
	' of that digit when using DisplayValue command
    #define DISP_SEG_DOT PortC.7

    'Select ports for the 7-segment device
    #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 dot 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