Diff: main.cpp

Revision:

0:309c546f048d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Dec 11 21:14:33 2011 +0000
@@ -0,0 +1,126 @@
+ #include "stdio.h"
+ #include "stdlib.h"
+ #include "math.h"
+ #include "mbed.h"
+ #include "ST7735_TFT.h"
+ #include "string"
+ #include "Arial12x12.h"
+ #include "Arial24x23.h"
+ #include "Arial28x28.h"
+
+ #define NUMBER_OF_STARS 300
+ #define SCREEN_WIDTH 128
+ #define SCREEN_HEIGHT 160
+ 
+ /*star struct*/
+typedef struct 
+{
+  float xpos, ypos;
+  short zpos, speed;
+  unsigned int color;
+} STAR;
+
+static STAR stars[NUMBER_OF_STARS];
+
+
+void init_star(STAR* star, int i)
+{
+  /* randomly init stars, generate them around the center of the screen */
+  
+  star->xpos =  -10.0 + (20.0 * (rand()/(RAND_MAX+1.0)));
+  star->ypos =  -10.0 + (20.0 * (rand()/(RAND_MAX+1.0)));
+  
+  star->xpos *= 3072.0; /*change viewpoint */
+  star->ypos *= 3072.0;
+
+  star->zpos =  i;
+  star->speed =  2 + (int)(2.0 * (rand()/(RAND_MAX+1.0)));
+
+  star->color = i*Cyan >> 2; /*the closer to the viewer the brighter*/
+}
+
+
+void init()
+{
+  int i;
+
+  for (i = 0; i < NUMBER_OF_STARS; i++)
+    {
+      init_star(stars + i, i + 1);
+    }
+}
+ 
+  
+ // the TFT is connected to SPI pin 5-7, CS is p8, RS is p11, reset is p15 
+ ST7735_TFT TFT(p5, p6, p7, p8, p11, p15,"TFT"); // mosi, miso, sclk, cs, rs, reset
+ 
+ Serial pc(USBTX, USBRX); // tx, rx
+ Timer t;
+
+extern unsigned char p1[];  // the mbed logo
+ 
+ int main() {
+    
+    unsigned int centerx, centery;
+    int i, j, tempx, tempy;  
+    init();
+    TFT.set_orientation(1);
+    centerx = TFT.width() >> 1;
+    centery = TFT.height() >> 1; 
+    
+     
+    TFT.claim(stdout);      // send stdout to the TFT display 
+    //TFT.claim(stderr);      // send stderr to the TFT display
+
+    TFT.background(Black);    // set background to black
+    TFT.foreground(White);    // set chars to white
+    
+    TFT.cls();
+    TFT.set_font((unsigned char*) Arial24x23);  // select the font
+        
+    t.start();
+
+    ////// demo start
+    
+    for ( j = 0 ; j < 10000; j++ ) 
+    {
+     
+      /* move and draw stars */
+       
+      for (i = 0; i < NUMBER_OF_STARS; i++)
+    {
+      tempx = (stars[i].xpos / stars[i].zpos) + centerx;
+      tempy = (stars[i].ypos / stars[i].zpos) + centery;
+      TFT.pixel(tempx,tempy,Black);
+      
+        
+      stars[i].zpos -= stars[i].speed;
+      
+      if (stars[i].zpos <= 0)
+        {
+          init_star(stars + i, i + 1);
+        }
+
+      //compute 3D position
+      tempx = (stars[i].xpos / stars[i].zpos) + centerx;
+      tempy = (stars[i].ypos / stars[i].zpos) + centery;
+
+      if (tempx < 0 || tempx > TFT.width() - 1 || tempy < 0 || tempy > TFT.height() - 1) //check if a star leaves the screen
+        {
+          init_star(stars + i, i + 1);
+          continue;
+        }
+      
+      TFT.pixel(tempx,tempy,stars[i].color);
+        
+    }
+     TFT.Bitmap(centerx-60,centery-19,120,38,p1);
+    }
+    
+    ///// demo stop
+
+    t.stop();
+    TFT.locate(0,10);
+    TFT.set_font((unsigned char*) Arial12x12);  // select the font
+    printf("Time %f s\n", t.read());
+  }
\ No newline at end of file