UnPlot

Syntax

UnPlot Ypos, Xpos

Overview

Clear an individual pixel on a graphic LCD.

Parameters

Xpos can be a constant, variable, or expression, pointing to the X-axis location of the pixel to clear. This must be a value of 0 to the X resolution of the LCD. Where 0 is the far left row of pixels. Ypos can be a constant, variable, or expression, pointing to the Y-axis location of the pixel to clear. This must be a value of 0 to the Y resolution of the LCD. Where 0 is the top column of pixels.

Example

   Device = 16F1829
  Declare Xtal = 4

  Declare LCD_Type = KS0108  ' Use a KS0108 Graphic LCD
'
' Graphic LCD Pin Assignments
'
  Declare LCD_DTPort = PORTD
  Declare LCD_RSPin = PORTC.2
  Declare LCD_RWPin = PORTE.0
  Declare LCD_ENPin = PORTC.5
  Declare LCD_CS1Pin = PORTE.1
  Declare LCD_CS2Pin = PORTE.2

  Dim Xpos as Byte
  Cls                           ' Clear the LCD
'
' Draw a line across the LCD
'
  Do                             ' Create an infinite loop
     For Xpos = 0 to 127
       Plot 20, Xpos
       DelayMs 10
     Next
     '
     ' Now erase the line
     '
     For Xpos = 0 to 127
       UnPlot 20, Xpos
       DelayMs 10
     Next
  Loop

See also : LCDRead, LCDWrite, Pixel, Plot. See Print for circuit.

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