Diff: main.cpp

Revision:

0:702ce703348d

Child:

1:14319ec53540

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Jan 13 12:36:30 2015 +0000
@@ -0,0 +1,232 @@
+#include "mbed.h"
+
+#include "RA8875.h"
+
+
+Serial pc(USBTX, USBRX);
+RA8875 lcd(p5, p6, p7, p12, NC, "tft");    // MOSI, MISO, SCK, /ChipSelect, /reset, name
+uint16_t width, height;
+
+#if 1
+void drawMandelbrot(float centrex, float centrey, float zoom, int maxIter) {
+    float xmin = centrex - 1.0/zoom;
+    float xmax = centrex + 1.0/zoom;
+    float ymin = centrey - height / (width * zoom);
+    float ymax = centrey + height / (width *zoom);
+ 
+    float dx = (xmax - xmin) / width;
+    float dy = (ymax - ymin) / height;
+ 
+    float y = ymin;
+ 
+    float c;
+    unsigned int cr, cg, cb;
+    
+    lcd.SetGraphicsCursor(0, 0);
+    color_t * pixelBuffer = (color_t *)malloc(width * sizeof(color_t));
+    
+    for (int j = 0; j < height; j++) {
+        float x = xmin;
+ 
+        for (int i = 0;  i < width; i++) {
+            float a = x;
+            float b = y;
+            int n = 0;
+ 
+            while (n < maxIter) {
+                float aa = a * a;
+                float bb = b * b;
+                float twoab = 2.0 * a * b;
+ 
+                a = aa - bb + x;
+                b = twoab + y;
+ 
+                if(aa + bb > 16.0) {
+                    break;
+                }
+                n++;
+            }
+ 
+            if (n == maxIter) {
+                //It's in the set - Black
+                pixelBuffer[i] = Black;             //lcd.pixel(i,j,Black);
+            } else {
+                //Not in the set - pick a colour
+                c = 3.0 * (maxIter-n)/maxIter;
+                cr = ((c < 1.0) ? 255 * ( 1.0 - c) : (c > 2.0) ? 255 * (c - 2.0) : 0);
+                cg = ((c < 1.0) ? 255 * c : (c > 2.0) ? 0 : 255 * (2.0 - c));
+                cb = ((c < 1.0) ? 0 : (c > 2.0) ? 255 * (3.0 - c) : 255 * (c - 1.0));
+                pixelBuffer[i] = RGB(cr,cg,cb);     //lcd.pixel(i,j, RGB(cr,cg,cb));
+            }
+            x += dx;
+        }
+        lcd.pixelStream(pixelBuffer, width, 0, j);  // send this scanline
+        y += dy;
+    }
+    free(pixelBuffer);
+}
+    
+int main()
+{
+    Timer timer;
+    pc.baud(460800);    // I like a snappy terminal, so crank it up!
+    pc.printf("\r\nRA8875 Portrait Mode Dev. - Build " __DATE__ " " __TIME__ "\r\n");
+    lcd.frequency(10000000);
+    lcd.init();
+    width = lcd.width();        // Could have set the dim, let's just adapt.
+    height = lcd.height();
+
+    lcd.claim(stdout);        // send stdout to the TFT display
+    lcd.background(Black);    // set background to black
+    lcd.foreground(White);    // set chars to white
+    lcd.cls();                // clear the screen
+    //lcd.set_font((unsigned char*) Arial12x12);  // select the font
+    //lcd.set_orientation(1);
+    lcd.TouchPanelCalibrate("Touch to Calibrate");          // calibrate the touch
+    point_t p;
+ 
+    lcd.locate(0,0);
+ 
+    //Setup base Mandelbrot
+    float centrex = -0.5;
+    float centrey = 0.0;
+    float zoom=0.5;
+    int maxiterations = 150;
+ 
+    while(true) {
+        //Draw it    
+        drawMandelbrot(centrex, centrey, zoom, maxiterations);
+    
+        //Wait for a touch
+        //p=lcd.get_touch();
+        //while(!lcd.is_touched(p)) {
+        //    p=lcd.get_touch();
+        //}
+        pc.printf("ready for touch\r\n");
+        while (!lcd.TouchPanelGet(&p))
+            ;
+        timer.start();
+        timer.reset();
+        while (lcd.TouchPanelReadable())
+            ;
+        if (timer.read_ms() > 4000) {   // long held is zoom out.
+            // zoom out
+            lcd.puts(50, 250, "Zooming out...");
+            pc.printf("zoom out\r\n");
+            centrex = -0.5;
+            centrey = 0.0;
+            zoom=0.5;
+        } else {
+            //Set new centre and zoom
+            //p = lcd.to_pixel(p);
+            lcd.puts(50, 250, "Zooming in...");
+            pc.printf("zoom in\r\n");
+            centrex += (2.0 * p.x - width) / (zoom * height);
+            centrey += (2.0 * p.y - height) / (zoom * width);
+            zoom *= 4.0;
+            lcd.rect(p.x - width / 8.0, p.y - height / 8.0, 
+                     p.x + width / 8.0, p.y + height / 8.0, Yellow);
+        }
+    }
+}
+
+#else
+
+void drawMandelbrot(float centrex, float centrey, float zoom, int maxIter) {
+    float xmin = centrex - 1.0/zoom;
+    float xmax = centrex + 1.0/zoom;
+    float ymin = centrey - height / (width * zoom);
+    float ymax = centrey + height / (width *zoom);
+ 
+    float dx = (xmax - xmin) / width;
+    float dy = (ymax - ymin) / height;
+ 
+    float y = ymin;
+ 
+    float c;
+    unsigned int cr, cg, cb;
+    
+    for (int j = 0; j < height; j++) {
+        float x = xmin;
+ 
+        for (int i = 0;  i < width; i++) {
+            float a = x;
+            float b = y;
+            int n = 0;
+ 
+            while (n < maxIter) {
+                float aa = a * a;
+                float bb = b * b;
+                float twoab = 2.0 * a * b;
+ 
+                a = aa - bb + x;
+                b = twoab + y;
+ 
+                if(aa + bb > 16.0) {
+                    break;
+                }
+                n++;
+            }
+ 
+            if (n == maxIter) {
+                //It's in the set - Black
+                lcd.pixel(i,j,Black);
+            } else {
+                //Not in the set - pick a colour
+                c = 3.0 * (maxIter-n)/maxIter;
+                cr = ((c < 1.0) ? 255 * ( 1.0 - c) : (c > 2.0) ? 255 * (c - 2.0) : 0);
+                cg = ((c < 1.0) ? 255 * c : (c > 2.0) ? 0 : 255 * (2.0 - c));
+                cb = ((c < 1.0) ? 0 : (c > 2.0) ? 255 * (3.0 - c) : 255 * (c - 1.0));
+                lcd.pixel(i,j, RGB(cr,cg,cb));
+            }
+            x += dx;
+        }
+        y += dy;
+    }
+}
+
+int main()
+{
+    pc.baud(460800);    // I like a snappy terminal, so crank it up!
+    pc.printf("\r\nRA8875 Portrait Mode Dev. - Build " __DATE__ " " __TIME__ "\r\n");
+     
+    lcd.init();
+    
+    wait_ms(250);
+    
+    lcd.cls();
+    lcd.SetOrientation(RA8875::rotate_0);
+    lcd.puts(30,30, "Normal Landscape");
+    lcd.line(0,0, lcd.width()/2, lcd.height()/2);
+    wait_ms(2500);
+    
+    lcd.cls();
+    lcd.SetOrientation(RA8875::rotate_90);
+    lcd.puts(30,30, "Rotated 90 Text\r\n");
+    lcd.line(0,0, lcd.width()/2, lcd.height()/2);
+    wait_ms(2500);
+    
+    lcd.cls();
+    lcd.SetOrientation(RA8875::rotate_180);
+    lcd.puts(30,30, "Rotated 180 Text\r\n");
+    lcd.line(0,0, lcd.width()/2, lcd.height()/2);
+    wait_ms(2500);
+
+    lcd.cls();
+    lcd.SetOrientation(RA8875::rotate_270);
+    lcd.puts(30,30, "Rotated 270 Text\r\n");
+    lcd.line(0,0, lcd.width()/2, lcd.height()/2);
+    wait_ms(2500);
+
+
+    while(1) {
+        while(!lcd.readable())
+            ;
+        if (lcd.readable()) {
+            int k = lcd.getc();
+            pc.printf("key: %02X \r\n", k);
+        }
+        wait_ms(50);
+    }
+}
+#endif