User`s manual

User’s Manual 119
Sets display contrast.
NOTE: This function is not used with the LCD/keypad module since the support circuits
are not available on the LCD/keypad module.
Fills the LCD display screen with a pattern.
PARAMETER
The screen will be set to all black if pattern is 0xFF, all white if pattern is 0x00, and vertical stripes
for any other pattern.
RETURN VALUE
None.
SEE ALSO
glBlock, glBlankScreen, glPlotPolygon, glPlotCircle
Blanks the LCD display screen (sets LCD display screen to white).
RETURN VALUE
None.
SEE ALSO
glFillScreen, glBlock, glPlotPolygon, glPlotCircle
Fills a rectangular block in the LCD buffer with the pattern specified. Any portion of the block that is
outside the LCD display area will be clipped.
PARAMETERS
left is the x coordinate of the top left corner of the block.
top is the y coordinate of the top left corner of the block.
width is the width of the block.
height is the height of the block.
pattern is the bit pattern to display (all black if pattern is 0xFF, all white if pattern is 0x00, and
vertical stripes for any other pattern).
RETURN VALUE
None.
SEE ALSO
glFillScreen, glBlankScreen, glBlock, glBlankRegion
void glSetContrast(unsigned level);
void glFillScreen(char pattern);
void glBlankScreen(void);
void glFillRegion(int left, int top, int width,
int height, char pattern);