NicholasSTG

I've got to trackdown the 'why' but changing the driver's SetPixel to

          private void SetPixel(int x, int y, ushort color) {
            if ((x < 0) || (x >= Width) || (y < 0) || (y >= Height)) return;

            var index = ((y * Width) + x) * sizeof(ushort) - y * 4;    

            if (index < 0 || index >= SpiBuffer.Length) return;
            SpiBuffer[index] = (byte) (color >> 8);
            SpiBuffer[++index] = (byte)(color);
        }

seems to have done the trick. The check on the index is just there because I was debugging.

What abt drawline? Did u try it?

I did.

I wrote this code to sort of see what was happening

public static void Main() {
            // DisplayPicture();

            tft.ClearScreen((ushort)AdaFruitST7735.Colors.White);
            // DisplayGradient();

            // DisplayCircles();

            for (int x = 0; x < 86; x++ )
            {
                tft.DrawPixel(x, 20, (ushort)AdaFruitST7735.Colors.Red);
            }

            for (int y = 0; y < 10; y++)
            {
                tft.DrawPixel(10, y, (ushort)AdaFruitST7735.Colors.Red);
            }

            for (int x = 0; x < 100; x++)
            {
                tft.DrawPixel(x, 5, (ushort)AdaFruitST7735.Colors.Green);
            }

            tft.DrawLine(50, 50, 50,100,(ushort)AdaFruitST7735.Colors.Blue);

            tft.DrawLine(50, 50, 100,50,(ushort)AdaFruitST7735.Colors.Yellow);

            tft.Refresh();

            // tft.ClearScreen();
            // DisplayLines();

            // DisplayColorFlow();
        }

The result looked like the attachment.

It seems that the 0 point is wrong so when the it tries to calculate a horizontal line the shifts in the register get out of whack.

 2012-09-28 15.05.12.jpg   83.9KB   29 downloads

Does ur circle changed direction?

The circles do animate when I use the appropriate method, yes.

IT almost seems as if 0,0 is in the wrong spot which throws off all of the other calculations.

I'm guessing you did not have this issue with the skewing?

I also downloaded that entire commit from codeplex and it did not make a change.