public static void DrawCircle(ILI9341Display display, UInt16 x0, UInt16 y0, UInt16 radius, UInt16 ulValue)
{
for (int y = -radius; y <= radius; y++)
for (int x = -radius; x <= radius; x++)
if (x * x + y * y <= radius * radius)
PixelDraw(display, (UInt16)(x + x0), (UInt16)(y + y0), ulValue);
}
//public static void BacklightOff(ILI9341Display display)
//{
// SendCommand(display, CMD_DISPLAY_FUNCTION_CONTROL);
// SendData(display, new byte[] { 0x0A, 0x02 });
//}
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);
}
private static void SendData(ILI9341Display display, byte[] Data)
{
display.DCPin.Write(GpioPinValue.High);
int blocksize = 65536;
if (Data.Length > blocksize)
{
int numBlocks = Data.Length / blocksize;
byte[] buffer = new byte[blocksize];
for (int block = 0; block < numBlocks; block++)
{
Array.Copy(Data, block * blocksize, buffer, 0, blocksize);
display.SpiDisplay.Write(buffer);
}
if (numBlocks * numBlocks < Data.Length)
{
// we have a bit more to send
byte[] bufferlast = new byte[Data.Length - (numBlocks * blocksize)];
Array.Copy(Data, Data.Length - bufferlast.Length, bufferlast, 0, bufferlast.Length);
display.SpiDisplay.Write(bufferlast);
}
}
else
{
display.SpiDisplay.Write(Data);
}
}
public static void write(ILI9341Display display, char[] c, byte textsize, int ulValue)
{
for (int len = 0; len < c.Length; len++)
{
write(display, c[len], textsize, ulValue);
}
}
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 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 LineDrawH(ILI9341Display display, UInt16 x, UInt16 y, UInt16 width, UInt16 color)
{
// Rudimentary clipping
if ((x >= display.LCD_HORIZONTAL_MAX) || (y >= display.LCD_VERTICAL_MAX)) return;
if ((x + width - 1) >= display.LCD_HORIZONTAL_MAX) width = (UInt16)(display.LCD_HORIZONTAL_MAX - x);
// this should set a 1 row high line on the screen for writing to
SetAddress(display, x, y, (UInt16)(x + width - 1), y);
byte hi = (byte)(color >> 8);
byte low = (byte)(color & 0xFF);
byte[] tmparray = new byte[width * 2];
//blast through creating the line
for (int col = 0; col < tmparray.Length; col += 2)
{
tmparray[col + 1] = low;
tmparray[col] = hi;
}
//send asap to the screen
SendCommand(display, CMD_MEMORY_WRITE_MODE);
SendData(display, tmparray);
}
public static async Task PortrateMode(ILI9341Display display)
{
try
{
SendCommand(display, CMD_MEMORY_ACCESS_CONTROL); SendData(display, new byte[] { 0x48 });
display.LCD_VERTICAL_MAX = ILI9341Display.VERTICAL_MAX_DEFAULT;
display.LCD_HORIZONTAL_MAX = ILI9341Display.HORIZONTAL_MAX_DEFAULT;
await LoadBitmap(display, display.currentImage);
Flush(display);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
public static void setCursor(ILI9341Display display, UInt16 x, UInt16 y)
{
// needs some bounds checking
display.cursorX = (byte)x;
display.cursorY = (byte)y;
}
public static void drawLine(ILI9341Display display, UInt16 x1, UInt16 y1, UInt16 x2, UInt16 y2, UInt16 ulValue)
{
UInt16 error, deltaX, deltaY;
int yStep;
bool SwapXY;
// is this a vertical line as we can call an optimized routine for it
if (x1 == x2)
{
// line drawV and H take a delta distance, not an absolute
LineDrawV(display, x1, y1, (UInt16)(y2 - y1), ulValue);
return;
}
// is this a horizontal line as we can call an optimized routine for it
if (y1 == y2)
{
// line drawV and H take a delta distance, not an absolute
LineDrawH(display, x1, y1, (UInt16)(x2 - x1), ulValue);
return;
}
// Determine if the line is steep. A steep line has more motion in the Y
// direction than the X direction.
if (((y2 > y1) ? (y2 - y1) : (y1 - y2)) > ((x2 > x1) ? (x2 - x1) : (x1 - x2)))
{
SwapXY = true;
}
else
{
SwapXY = false;
}
// If the line is steep, then swap the X and Y coordinates.
if (SwapXY)
{
error = x1;
x1 = y1;
y1 = error;
error = x2;
x2 = y2;
y2 = error;
}
//
// If the starting X coordinate is larger than the ending X coordinate,
// then swap the start and end coordinates.
//
if (x1 > x2)
{
error = x1;
x1 = x2;
x2 = error;
error = y1;
y1 = y2;
y2 = error;
}
// Compute the difference between the start and end coordinates in each axis.
deltaX = (UInt16)(x2 - x1);
deltaY = (UInt16)((y2 > y1) ? (y2 - y1) : (y1 - y2));
// Initialize the error term to negative half the X delta.
error = (UInt16)(-deltaX / 2);
// Determine the direction to step in the Y axis when required.
if (y1 < y2) yStep = 1;
else yStep = -1;
// Loop through all the points along the X axis of the line.
for (; x1 <= x2; x1++)
{
// See if this is a steep line.
if (SwapXY)
{
// Plot this point of the line, swapping the X and Y coordinates.
PixelDraw(display, y1, x1, ulValue);
}
else
{
// Plot this point of the line, using the coordinates as is.
PixelDraw(display, x1, y1, ulValue);
}
// Increment the error term by the Y delta.
error += deltaY;
// See if the error term is now greater than zero.
if (error > 0)
{
// Take a step in the Y axis.
y1 = (UInt16)(y1 + yStep); // this could be a - or a + step
// Decrement the error term by the X delta.
error -= deltaX;
}
}
}
public static void drawChar(ILI9341Display display, UInt16 x, UInt16 y, byte c, UInt16 size, int ulValue)
{
if ((x >= display.LCD_HORIZONTAL_MAX) || (y >= display.LCD_VERTICAL_MAX) || ((x + 6 * size - 1) < 0) || ((y + 8 * size - 1) < 0))
return; // bounds checks
for (byte i = 0; i < 6; i++) // 5*7 font + space
{
UInt16 line; // index into character font array
if (i == 5) line = 0x0; // space between characters
else line = DisplayFont.font[((c * 5) + i)];
for (byte j = 0; j < 8; j++) // now process each bit of the character
{// we have a bit and normal colour or no bit and inverted
if ((((line & 0x1) == 1) && (ulValue != 0)) || (((line & 0x1) == 0) && (ulValue == 0))) // do we have a bit and black pixels (clear bits)
{
if (size == 1) // default size
PixelDraw(display, (UInt16)(x + i), (UInt16)(y + j), ulValue);
else
{ // scaled up font
Graphics_Rectangle pRect;
pRect.XMin = x + (i * size);
pRect.YMin = y + (j * size);
pRect.XMax = pRect.XMin + size - 1;
pRect.YMax = pRect.YMin + size - 1;
fillRect(display, (UInt16)(x + (i * size)), (UInt16)(y + (j * size)), size, size, ulValue);
}
}
line >>= 1; // next bit in the line
}
}
}
public static void PixelDraw(ILI9341Display display, UInt16 x, UInt16 y, int color)
{
if ( (y > 265) || (x > 265))
{
return;
}
if ((x < 0) || (x >= display.LCD_HORIZONTAL_MAX) || (y < 0) || (y >= display.LCD_VERTICAL_MAX)) return;
byte hi = (byte)(color >> 8), low = (byte)(color & 0xff);
SetAddress(display, x, y, (UInt16)(x + 1), (UInt16)(y + 1));
SendCommand(display, CMD_MEMORY_WRITE_MODE);
SendData(display, new byte[] { hi, low });
}
public static void write(ILI9341Display display, char c, byte textsize, int ulValue)
{
// bounds check
if (display.cursorY >= display.LCD_VERTICAL_MAX) return; // were off the screen
if (c == '\n') // do we have a new line, if so simply adjust cursor position
{
display.cursorY += (byte)(textsize * 8); // next line based on font size
display.cursorX = 0; // back to character 0
}
else if (c == '\r')
{
display.cursorX = 0; // back to character 0
}
else
{
drawChar(display, display.cursorX, display.cursorY, (byte)c, textsize, ulValue);
display.cursorX += (UInt16)(textsize * 6);
if (AutoWrap && (display.cursorX > (display.LCD_HORIZONTAL_MAX - textsize * 6)))
{
display.cursorY += (byte)(textsize * 8); // next line based on font size
display.cursorX = 0; // back to character 0
}
}
}
public async static void Sleep(ILI9341Display display)
{
SendCommand(display, CMD_DISPLAY_OFF);
await Task.Delay(TimeSpan.FromSeconds(1));
SendCommand(display, CMD_ENTER_SLEEP);
}
public static void LineDrawV(ILI9341Display display, UInt16 x, UInt16 y, UInt16 height, UInt16 color)
{
// Rudimentary clipping
if ((x >= display.LCD_HORIZONTAL_MAX) || (y >= display.LCD_VERTICAL_MAX)) return;
if ((y + height - 1) >= display.LCD_VERTICAL_MAX) height = (UInt16)(display.LCD_VERTICAL_MAX - y);
// this should set a 1 column wide line on the screen for writing to
SetAddress(display, x, y, x, (UInt16)(y + height - 1));
byte hi = (byte)(color >> 8);
byte low = (byte)(color & 0xFF);
byte[] tmparray = new byte[height * 2];
//blast through creating the line
for (int row = 0; row < tmparray.Length; row += 2)
{
tmparray[row] = hi;
tmparray[row + 1] = low;
}
//send asap to the screen
SendCommand(display, CMD_MEMORY_WRITE_MODE);
SendData(display, tmparray);
}
public static void DisplayOff(ILI9341Display display)
{
SendCommand(display, CMD_DISPLAY_OFF);
}
public static void fillRect(ILI9341Display display, UInt16 x, UInt16 y, UInt16 width, UInt16 height, int color)
{
try
{
// Rudimentary clipping
if ((x >= display.LCD_HORIZONTAL_MAX) || (y >= display.LCD_VERTICAL_MAX)) return;
if ((x + width - 1) >= display.LCD_HORIZONTAL_MAX) width = (UInt16)(display.LCD_HORIZONTAL_MAX - x);
if ((y + height - 1) >= display.LCD_VERTICAL_MAX) height = (UInt16)(display.LCD_VERTICAL_MAX - y);
byte hi = (byte)(color >> 8), low = (byte)(color & 0xff);
byte[] tmparray = new byte[height * width * 2];
for (int xb = 0; xb < tmparray.Length; xb += 2)
{
tmparray[xb + 1] = low;
tmparray[xb] = hi;
}
SetAddress(display, x, y, (UInt16)(x + width - 1), (UInt16)(y + height - 1));
SendCommand(display, CMD_MEMORY_WRITE_MODE);
SendData(display, tmparray);
}
catch (Exception ex)
{
throw;
}
}
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 ResetDisplay(ILI9341Display display)
{
// assume power has just been turned on
display.ResetPin.Write(GpioPinValue.High);
await Task.Delay(10);
display.ResetPin.Write(GpioPinValue.Low); // reset
await Task.Delay(10); // wait 10 ms
display.ResetPin.Write(GpioPinValue.High); // out of reset
await Task.Delay(150);
}
// loads a bitmap directly to the screen area designated by the x1, y1, width and height, it will scale etc automatically
public static async Task LoadBitmap(ILI9341Display display, UInt16 x1, UInt16 y1, UInt16 width, UInt16 height, string name)
{
// basic bounds checking
if ((x1 + width > display.LCD_HORIZONTAL_MAX) | (y1 + height > display.LCD_VERTICAL_MAX)) return;
byte[] imagemap;
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(width),
ScaledHeight = Convert.ToUInt32(height)
};
PixelDataProvider pixelData = await decoder.GetPixelDataAsync(
BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Straight,
transform,
ExifOrientationMode.RespectExifOrientation,
ColorManagementMode.DoNotColorManage
);
byte[] sourcePixels = pixelData.DetachPixelData();
if (sourcePixels.Length != width * height * 4) return; // make sure it scaled and loaded right
imagemap = new byte[width * height * 2]; // something to put the image in
int pi = 0;
for (UInt32 x = 0; x < sourcePixels.Length - 1; x += 4)
{
// we ignore the alpha value [3]
ushort temp = RGB24ToRGB565(sourcePixels[x + 2], sourcePixels[x + 1], sourcePixels[x]);
imagemap[pi * 2] = (byte)((temp >> 8) & 0xFF);
imagemap[pi * 2 + 1] = (byte)(temp & 0xFF);
pi++;
}
}
SetAddress(display, x1, y1, (UInt16)(x1 + width - 1), (UInt16)(y1 + height - 1));
SendCommand(display, CMD_MEMORY_WRITE_MODE);
SendData(display, imagemap);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
public static async Task InitRegisters(ILI9341Display display)
{
// MORE PADDING
SendCommand(display, CMD_POWER_CONTROL_1); SendData(display, new byte[] { padding, 0x10, padding, 0x10 });
SendCommand(display, CMD_POWER_CONTROL_2); SendData(display, new byte[] { padding, 0x41 });
SendCommand(display, CMD_VCOM_CONTROL_1); SendData(display, new byte[] { padding, 0x00, padding, 0x22, padding, 0x80 });
SendCommand(display, CMD_MEMORY_ACCESS_CONTROL); SendData(display, new byte[] { padding, 0x68 });
SendCommand(display, CMD_INTERFACE_MODE_CONTROL); SendData(display, new byte[] { padding, 0x00 });
SendCommand(display, CMD_FRAME_RATE_CONTROL_NORMAL); SendData(display, new byte[] { padding, 0xB0, padding, 0x11 });
SendCommand(display, CMD_DISPLAY_INVERSION_CONTROL); SendData(display, new byte[] { padding, 0x02 });
SendCommand(display, CMD_INTERFACE_PIXEL_FORMAT); SendData(display, new byte[] { padding, 0x55 }); // the wave share is actually working in 16bit parallel mode
SendCommand(display, CMD_SET_IMAGE_FUNCTION); SendData(display, new byte[] { padding, 0x01 });
SendCommand(display, CMD_ENTRY_MODE_SET); SendData(display, new byte[] { padding, 0xC6 });
SendCommand(display, CMD_ADJUST_CONTROL_3); SendData(display, new byte[] { padding, 0xA9, padding, 0x51, padding, 0x2C, padding, 0x82 });
SendCommand(display, CMD_DISPLAY_FUNCTION_CONTROL);
SendData(display, new byte[] { padding, 0x00, padding, 0x22, padding, 0x3B });
//SendCommand(display, ILI9488_CMD_POSITIVE_GAMMA_CTRL); SendData(display, new byte[] { padding, 0x00, padding, 0x07, padding, 0x0F, padding, 0x0D, padding, 0x1B, padding, 0x0A, padding, 0x3C, padding, 0x78, padding, 0x4A, padding, 0x07, padding, 0x0E, padding, 0x09, padding, 0x1B, padding, 0x1E, padding, 0x0F });
//SendCommand(display, ILI9488_CMD_NEGATIVE_GAMMA_CTRL); SendData(display, new byte[] { padding, 0x00, padding, 0x22, padding, 0x24, padding, 0x06, padding, 0x12, padding, 0x07, padding, 0x36, padding, 0x47, padding, 0x47, padding, 0x06, padding, 0x0A, padding, 0x07, padding, 0x30, padding, 0x37, padding, 0x0F });
SendCommand(display, CMD_POSITIVE_GAMMA_CTRL);
SendData(display, new byte[] { padding, 0x0F, padding, 0x1F, padding, 0x1C, padding, 0x0B, padding, 0x0E, padding, 0x09, padding, 0x48, padding, 0x99, padding, 0x38, padding, 0x0A, padding, 0x14, padding, 0x06, padding, 0x11, padding, 0x09, padding, 0x00 });
SendCommand(display, CMD_NEGATIVE_GAMMA_CTRL);
SendData(display, new byte[] { padding, 0x0F, padding, 0x36, padding, 0x2E, padding, 0x09, padding, 0x0A, padding, 0x04, padding, 0x46, padding, 0x66, padding, 0x37, padding, 0x06, padding, 0x10, padding, 0x04, padding, 0x24, padding, 0x20, padding, 0x00 });
}
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 ???
int numBlocks = display.DisplayBuffer.Length / block_size;
byte[] buffer = new byte[block_size];
// now we start to write the buffer out
SendCommand(display, CMD_MEMORY_WRITE_MODE);
for (int block = 0; block < numBlocks; block++)
{
Array.Copy(display.DisplayBuffer, block * block_size, buffer, 0, block_size);
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);
//await ResetDisplay(display);
//await InitRegisters(display);
//await Wakeup(display);
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);
}
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 void Arc(ILI9341Display display, UInt16 lX, UInt16 lY, UInt16 Radius, UInt16 startAngle, UInt16 endAngle, int ulValue)
{
ArcEx(display, lX, lY, Radius, startAngle, endAngle, 0.1, ulValue);
}
// x, y are the center of the Arc
public static void ArcEx(ILI9341Display display, UInt16 lX, UInt16 lY, UInt16 Radius, UInt16 startAngle, UInt16 endAngle, double increment, int ulValue)
{
double startA = startAngle;
double endA = endAngle;
if (startA > 360) startA = 360;
if (endA > 360) endA = 360;
if (increment > 10) increment = 10.0;
if (increment < 0.1) increment = 0.1;
for (double i = startA; i < endA; i += increment)
{
double angle = i * System.Math.PI / 180;
UInt16 x = (UInt16)(lX + Radius * System.Math.Sin(angle));
UInt16 y = (UInt16)(lY - Radius * System.Math.Cos(angle));
PixelDraw(display, x, y, (UInt16)ulValue);
}
}
