Initial ESP8266 HW SPI implementation

ILI9341 lib as a client for SPI lib

libraries/TFT_Touch_Shield_V2/examples/paint/paint.ino

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+// Paint application - Demonstate both TFT and Touch Screen
+#include <stdint.h>
+#include <SeeedTouchScreen.h>
+#include <TFTv2.h>
+#include <SPI.h>
+
+int ColorPaletteHigh = 30;
+int color = WHITE;  //Paint brush color
+unsigned int colors[8] = {BLACK, RED, GREEN, BLUE, CYAN, YELLOW, WHITE, GRAY1};
+
+// For better pressure precision, we need to know the resistance
+// between X+ and X- Use any multimeter to read it
+// The 2.8" TFT Touch shield has 300 ohms across the X plate
+
+TouchScreen ts = TouchScreen(XP, YP, XM, YM); //init TouchScreen port pins
+
+void setup()
+{
+    Tft.TFTinit();  //init TFT library
+    Serial.begin(115200);
+    //Draw the pallet
+    for(int i = 0; i<8; i++)
+    {
+        Tft.fillRectangle(i*30, 0, 30, ColorPaletteHigh, colors[i]);
+    }
+}
+
+void loop()
+{
+    // a point object holds x y and z coordinates.
+    Point p = ts.getPoint();
+
+    //map the ADC value read to into pixel co-ordinates
+
+    p.x = map(p.x, TS_MINX, TS_MAXX, 0, 240);
+    p.y = map(p.y, TS_MINY, TS_MAXY, 0, 320);
+
+    // we have some minimum pressure we consider 'valid'
+    // pressure of 0 means no pressing!
+
+    if (p.z > __PRESURE) {
+        // Detect  paint brush color change
+        if(p.y < ColorPaletteHigh+2)
+        {
+            color = colors[p.x/30];
+        }
+        else
+        {
+            Tft.fillCircle(p.x,p.y,2,color);
+        }
+    }
+}
+/*********************************************************************************************************
+  END FILE
+*********************************************************************************************************/