include/lc7981.c File Reference

#include "lc7981.h"

Functions

void lcd_init (uint8_t mode)
 lcd_init set the to default values.
void lcd_write_command (uint8_t cmd, uint8_t data)
 Writes a command and a data byte to the lcd.
uint8_t lcd_read_byte ()
 Reads a byte from the display memory.
void lcd_strobe ()
 Generates the strobe signal for writing data.
void lcd_clear ()
 Clears the display by setting the whole memory to 0.
void lcd_write_text (char *txt)
void lcd_gotoxy (uint8_t x, uint8_t y)
 Set the display cursor to a specific location.
void lcd_plot_pixel (uint8_t x, uint8_t y, uint8_t set)
 set or unset a pixel at the specified location
void lcd_plot_bitmap (uint8_t x_off, uint8_t y_off, const uint8_t *bitmap, uint8_t w, uint8_t h)

Variables

uint8_t lcd_mode
 Currently used mode, can be text or graphic.
uint8_t lcd_curline
 Current line. Used for scrolling in text mode.

Function Documentation

void lcd_clear (  )  [inline]

Clears the display by setting the whole memory to 0.

void lcd_gotoxy ( uint8_t  x,
uint8_t  y 
) [inline]

Set the display cursor to a specific location.

Right now this does only work in text mode, since there's no need for it now in graphics mode.
If the x and y values are to big, the function does nothing.

Parameters:
x the horizontal cursorposition (starts at 0)
y the vertical cursorposition (starts at 0)

void lcd_init ( uint8_t  mode  ) 

lcd_init set the to default values.

Parameters:
mode LCD_TEXT for text mode and LCD_GRAPHIC for graphic mode

void lcd_plot_bitmap ( uint8_t  x_off,
uint8_t  y_off,
const uint8_t *  bitmap,
uint8_t  w,
uint8_t  h 
)

void lcd_plot_pixel ( uint8_t  x,
uint8_t  y,
uint8_t  set 
)

set or unset a pixel at the specified location

Parameters:
x horizontal position of the pixel (starts at 0)
y horizontal position of the pixel (starts at 0)
set can be PIXEL_ON or PIXEL_OFF

uint8_t lcd_read_byte (  )  [inline]

Reads a byte from the display memory.

lcd_gotoxy can be used to set the location. Important : lcd_gotoxy doesn't work in graphics mode yet.

Returns:
the byte which has been read
See also:
lcd_gotoxy

void lcd_strobe (  )  [inline]

Generates the strobe signal for writing data.

This function is meant for internal usage only.

void lcd_write_command ( uint8_t  cmd,
uint8_t  data 
) [inline]

Writes a command and a data byte to the lcd.

Parameters:
cmd the command byte
data the data that is going to be written after the command

void lcd_write_text ( char *  txt  ) 


Variable Documentation

uint8_t lcd_curline

Current line. Used for scrolling in text mode.

uint8_t lcd_mode

Currently used mode, can be text or graphic.


Generated on Sat May 16 13:46:33 2009 for glcd by  doxygen 1.5.5