part 3 and final:
/*--------------------------------------------------------------------------------------------------
Name : LcdPixel
Description : Displays a pixel at given absolute (x, y) location.
Argument(s) : x, y -> Absolute pixel coordinates
mode -> Off, On or Xor. See enum.
Return value : None.
--------------------------------------------------------------------------------------------------*/
void LcdPixel ( byte x, byte y, int mode )
{
word index;
byte offset;
byte data;
if ( x > LCD_X_RES ) return;
if ( y > LCD_Y_RES ) return;
index = ((y / 8) * 84) + x;
offset = y - ((y / 8) * 8);
data = LcdCache[index];
if ( mode == PIXEL_OFF )
{
data &= (~(0x01 << offset));
}
else if ( mode == PIXEL_ON )
{
data |= (0x01 << offset);
}
else if ( mode == PIXEL_XOR )
{
data ^= (0x01 << offset);
}
LcdCache[index] = data;
if ( index < LoWaterMark )
{
// Update low marker.
LoWaterMark = index;
}
if ( index > HiWaterMark )
{
// Update high marker.
HiWaterMark = index;
}
}
/*--------------------------------------------------------------------------------------------------
Name : LcdLine
Description : Draws a line between two points on the display.
Argument(s) : x1, y1 -> Absolute pixel coordinates for line origin.
x2, y2 -> Absolute pixel coordinates for line end.
mode -> Off, On or Xor. See enum.
Return value : None.
--------------------------------------------------------------------------------------------------*/
void LcdLine ( byte x1, byte y1, byte x2, byte y2, int mode )
{
int dx, dy, stepx, stepy, fraction;
dy = y2 - y1;
dx = x2 - x1;
if ( dy < 0 )
{
dy = -dy;
stepy = -1;
}
else
{
stepy = 1;
}
if ( dx < 0 )
{
dx = -dx;
stepx = -1;
}
else
{
stepx = 1;
}
dx <<= 1;
dy <<= 1;
LcdPixel( x1, y1, mode );
if ( dx > dy )
{
fraction = dy - (dx >> 1);
while ( x1 != x2 )
{
if ( fraction >= 0 )
{
y1 += stepy;
fraction -= dx;
}
x1 += stepx;
fraction += dy;
LcdPixel( x1, y1, mode );
}
}
else
{
fraction = dx - (dy >> 1);
while ( y1 != y2 )
{
if ( fraction >= 0 )
{
x1 += stepx;
fraction -= dy;
}
y1 += stepy;
fraction += dx;
LcdPixel( x1, y1, mode );
}
}
UpdateLcd = true;
}
/*--------------------------------------------------------------------------------------------------
Name : LcdUpdate
Description : Copies the LCD cache into the device RAM.
Argument(s) : None.
Return value : None.
--------------------------------------------------------------------------------------------------*/
void LcdUpdate ( void )
{
int i;
//always update everything for the moment
LoWaterMark = 0;
HiWaterMark = LCD_CACHE_SIZE - 1;
if ( LoWaterMark < 0 ){
LoWaterMark = 0;
}
else if ( LoWaterMark >= LCD_CACHE_SIZE ){
LoWaterMark = LCD_CACHE_SIZE - 1;
}
if ( HiWaterMark < 0 ){
HiWaterMark = 0;
}
else if ( HiWaterMark >= LCD_CACHE_SIZE ){
HiWaterMark = LCD_CACHE_SIZE - 1;
}
// Set base address according to LoWaterMark.
LcdSendCmd( 0x80 | (LoWaterMark % LCD_X_RES), LCD_CMD );
LcdSendCmd( 0x40 | (LoWaterMark / LCD_X_RES), LCD_CMD );
// Serialize the video buffer.
for ( i = LoWaterMark; i <= HiWaterMark; i++ )
{
LcdSendCmd( LcdCache[i], LCD_DATA );
}
// Reset watermark pointers.
LoWaterMark = LCD_CACHE_SIZE - 1;
HiWaterMark = 0;
UpdateLcd = false;
}
void setup() {
beginSerial(19200);
//power the control led
pinMode(CONTROL_LED,OUTPUT);
pinMode(LCD_RST_PIN,OUTPUT);
pinMode(LCD_DC_PIN ,OUTPUT);
pinMode(LCD_CE_PIN ,OUTPUT);
pinMode(SPI_MOSI_PIN ,OUTPUT);
pinMode(SPI_CLK_PIN,OUTPUT);
pinMode(voltometer,OUTPUT);
//power the display
pinMode(LCD_POWER_PIN,OUTPUT);
//start
digitalWrite(CONTROL_LED, HIGH);
analogWrite(voltometer, 150);
LcdInit();
}
void loop() {
LcdClear();
delay(100);
LcdGotoXY ( 7, 3 );
LcdStr(1, "OK");
LcdUpdate();
delay(500);
}
hope you can work with it.