private static void SetAddress(ILI9341Display display, UInt16 x0, UInt16 y0, UInt16 x1, UInt16 y1)
{
SendCommand(display, CMD_COLUMN_ADDRESS_SET);
SendData(display, new byte[] { (byte)(x0 >> 8), (byte)(x0), (byte)(x1 >> 8), (byte)(x1) });
SendCommand(display, CMD_PAGE_ADDRESS_SET);
SendData(display, new byte[] { (byte)(y0 >> 8), (byte)(y0), (byte)(y1 >> 8), (byte)(y1) });
}
public static async Task Wakeup(ILI9341Display display)
{
SendCommand(display, CMD_SLEEP_OUT);
await Task.Delay(60);
SendCommand(display, CMD_POWER_CONTROL_A); SendData(display, new byte[] { 0x39, 0x2C, 0x00, 0x34, 0x02 });
SendCommand(display, CMD_POWER_CONTROL_B); SendData(display, new byte[] { 0x00, 0xC1, 0x30 });
SendCommand(display, CMD_DRIVER_TIMING_CONTROL_A); SendData(display, new byte[] { 0x85, 0x00, 0x78 });
SendCommand(display, CMD_DRIVER_TIMING_CONTROL_B); SendData(display, new byte[] { 0x00, 0x00 });
SendCommand(display, CMD_POWER_ON_SEQUENCE_CONTROL); SendData(display, new byte[] { 0x64, 0x03, 0x12, 0x81 });
SendCommand(display, CMD_PUMP_RATIO_CONTROL); SendData(display, new byte[] { 0x20 });
SendCommand(display, CMD_POWER_CONTROL_1); SendData(display, new byte[] { 0x23 });
SendCommand(display, CMD_POWER_CONTROL_2); SendData(display, new byte[] { 0x10 });
SendCommand(display, CMD_VCOM_CONTROL_1); SendData(display, new byte[] { 0x3e, 0x28 });
SendCommand(display, CMD_VCOM_CONTROL_2); SendData(display, new byte[] { 0x86 });
SendCommand(display, CMD_MEMORY_ACCESS_CONTROL); SendData(display, new byte[] { 0x48 });
SendCommand(display, CMD_PIXEL_FORMAT); SendData(display, new byte[] { 0x55 });
SendCommand(display, CMD_FRAME_RATE_CONTROL); SendData(display, new byte[] { 0x00, 0x18 });
SendCommand(display, CMD_DISPLAY_FUNCTION_CONTROL); SendData(display, new byte[] { 0x08, 0x82, 0x27 });
SendCommand(display, CMD_ENABLE_3G); SendData(display, new byte[] { 0x00 });
SendCommand(display, CMD_GAMMA_SET); SendData(display, new byte[] { 0x01 });
SendCommand(display, CMD_POSITIVE_GAMMA_CORRECTION); SendData(display, new byte[] { 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00 });
SendCommand(display, CMD_NEGATIVE_GAMMA_CORRECTION); SendData(display, new byte[] { 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F });
SendCommand(display, CMD_SLEEP_OUT);
await Task.Delay(120);
SendCommand(display, CMD_DISPLAY_ON);
}
public static void InitializeDisplayBuffer(ILI9341Display display, UInt16 colour)
{
for (uint i = 0; i < display.LCD_HORIZONTAL_MAX * display.LCD_VERTICAL_MAX; i++)
{
display.DisplayBuffer[i * 2] = (byte)(colour >> 8);
display.DisplayBuffer[i * 2 + 1] = (byte)(colour & 0xFF);
}
}
public static async Task PowerOnSequence(ILI9341Display display)
{
// assume power has just been turned on
await Task.Delay(5);
display.ResetPin.Write(GpioPinValue.Low); // reset
await Task.Delay(5); // wait 5 ms
display.ResetPin.Write(GpioPinValue.High); // out of reset
await Task.Delay(20);
}
public static async Task landscapeMode(ILI9341Display display)
{
try {
SendCommand(display, CMD_MEMORY_ACCESS_CONTROL); SendData(display, new byte[] { 0xE8 });
display.LCD_HORIZONTAL_MAX = ILI9341Display.VERTICAL_MAX_DEFAULT;
display.LCD_VERTICAL_MAX = ILI9341Display.HORIZONTAL_MAX_DEFAULT;
await LoadBitmap(display, display.currentImage);
Flush(display);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
public static async Task LoadBitmap(ILI9341Display display, string name)
{
try
{
StorageFile srcfile = await StorageFile.GetFileFromApplicationUriAsync(new Uri(name));
using (IRandomAccessStream fileStream = await srcfile.OpenAsync(Windows.Storage.FileAccessMode.Read))
{
BitmapDecoder decoder = await BitmapDecoder.CreateAsync(fileStream);
BitmapTransform transform = new BitmapTransform()
{
ScaledWidth = Convert.ToUInt32(display.LCD_HORIZONTAL_MAX),
ScaledHeight = Convert.ToUInt32(display.LCD_VERTICAL_MAX)
};
PixelDataProvider pixelData = await decoder.GetPixelDataAsync(
BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Straight,
transform,
ExifOrientationMode.RespectExifOrientation,
ColorManagementMode.DoNotColorManage
);
byte[] sourcePixels = pixelData.DetachPixelData();
if (sourcePixels.Length != display.LCD_HORIZONTAL_MAX * display.LCD_VERTICAL_MAX * 4)
{
return;
}
int pi = 0;
for (UInt32 x = 0; x < sourcePixels.Length - 1; x += 4)
{
// we ignore the alpha value [3]
ushort temp = ILI9341.RGB24ToRGB565(sourcePixels[x + 2], sourcePixels[x + 1], sourcePixels[x]);
display.DisplayBuffer[pi * 2] = (byte)((temp >> 8) & 0xFF);
display.DisplayBuffer[pi * 2 + 1] = (byte)(temp & 0xFF);
pi++;
}
}
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
display.currentImage = name;
}
public static void Flush(ILI9341Display display)
{
if (display.DisplayBuffer.Length != display.LCD_VERTICAL_MAX * display.LCD_HORIZONTAL_MAX * 2)
{
return;
}
SetAddress(display, 0, 0, (UInt16)(display.LCD_HORIZONTAL_MAX - 1), (UInt16)(display.LCD_VERTICAL_MAX - 1));
int block_size = 51200; // limits of the SPI interface is 64K but this is an even block for display ???
byte[] buffer = new byte[block_size];
// now we start to write the buffer out
SendCommand(display, CMD_MEMORY_WRITE_MODE);
Array.Copy(display.DisplayBuffer, 0, buffer, 0, 51200);
SendData(display, buffer);
Array.Copy(display.DisplayBuffer, 51200, buffer, 0, 51200);
SendData(display, buffer);
Array.Copy(display.DisplayBuffer, 51200 * 2, buffer, 0, 51200);
SendData(display, buffer);
}
public static async Task InitILI9341DisplaySPI(ILI9341Display display, int SPIDisplaypin, int speed, SpiMode mode, string SPI_CONTROLLER_NAME, string DefaultDisplay)
{
var displaySettings = new SpiConnectionSettings(SPIDisplaypin);
displaySettings.ClockFrequency = speed; // 500kHz;
displaySettings.Mode = mode; //Mode0,1,2,3; MCP23S17 needs mode 0
string DispspiAqs = SpiDevice.GetDeviceSelector(SPI_CONTROLLER_NAME);
var DispdeviceInfo = await DeviceInformation.FindAllAsync(DispspiAqs);
display.SpiDisplay = await SpiDevice.FromIdAsync(DispdeviceInfo[0].Id, displaySettings);
if (String.IsNullOrEmpty(DefaultDisplay))
{
InitializeDisplayBuffer(display, ILI9341Display.BLACK);
}
else
{
await LoadBitmap(display, DefaultDisplay);
}
await PowerOnSequence(display);
await Wakeup(display);
Flush(display);
}
private static void SendCommand(ILI9341Display display, byte[] Command)
{
display.DCPin.Write(GpioPinValue.Low);
display.SpiDisplay.Write(Command);
}
private static void SendData(ILI9341Display display, byte[] Data)
{
display.DCPin.Write(GpioPinValue.High);
display.SpiDisplay.Write(Data);
}
public static void Sleep(ILI9341Display display)
{
SendCommand(display, CMD_DISPLAY_OFF);
SendCommand(display, CMD_ENTER_SLEEP);
}
