public void CreateChar(int location, int[] charMap)
{
location &= 0x7; // we only have 8 locations 0-7
_command(Constants.SetCGRAMAddr | (location << 3));
StopwatchDelay.DelayMicroSeconds(30);
for (int i = 0; i < 8; i++)
{
Write(charMap[i]); // call the virtual write method
StopwatchDelay.DelayMicroSeconds(40);
}
}
public void Home()
{
_command(Constants.ReturnHome);
StopwatchDelay.DelayMicroSeconds(Constants.HomeClearExec);
}
public void Clear()
{
_command(Constants.ClearDisplay);
StopwatchDelay.DelayMicroSeconds(Constants.HomeClearExec);
}
public virtual void Begin(int cols, int rows, int charSize = Constants.LCD_5x8DOTS)
{
if (rows > 1)
{
_displayFunction |= Constants.LCD_2LINE;
}
_numlines = rows;
_cols = cols;
StopwatchDelay.Delay(100);
if ((_displayFunction & Constants.LCD_8BITMODE) == 0)
{
// this is according to the hitachi HD44780 datasheet
// figure 24, pg 46
// we start in 8bit mode, try to set 4 bit mode
Send(0x03, Constants.FOUR_BITS);
StopwatchDelay.DelayMicroSeconds(4500); // wait min 4.1ms
// second try
Send(0x03, Constants.FOUR_BITS);
StopwatchDelay.DelayMicroSeconds(4500); // wait min 4.1ms
// third go!
Send(0x03, Constants.FOUR_BITS);
StopwatchDelay.DelayMicroSeconds(150);
// finally, set to 4-bit interface
Send(0x02, Constants.FOUR_BITS);
}
else
{
// this is according to the hitachi HD44780 datasheet
// page 45 figure 23
// Send function set command sequence
_command(Constants.FunctionSet | _displayFunction);
StopwatchDelay.DelayMicroSeconds(4500); // wait more than 4.1ms
// second try
_command(Constants.FunctionSet | _displayFunction);
StopwatchDelay.DelayMicroSeconds(150);
// third go
_command(Constants.FunctionSet | _displayFunction);
}
// finally, set # lines, font size, etc.
_command(Constants.FunctionSet | _displayFunction);
// turn the display on with no cursor or blinking default
_displaycontrol = Constants.DisplayOn | Constants.CursorOff | Constants.BlinkOff;
Display();
// clear the LCD
Clear();
// Initialize to default text direction (for romance languages)
_displaymode = Constants.EntryLeft | Constants.ShiftDecrement;
// set the entry mode
_command(Constants.EntryModeSet | _displaymode);
BackLight();
}
