Diff: main.cpp

Revision:

0:31e2d78f22ef

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Dec 20 22:28:22 2012 +0000
@@ -0,0 +1,79 @@
+#include "mbed.h"
+#include "GD.h"
+#include "arduino.h"
+#include "shield.h"
+
+GDClass GD(ARD_MOSI, ARD_MISO, ARD_SCK, ARD_D9, USBTX, USBRX) ;
+SPI spimain(ARD_MOSI, ARD_MISO, ARD_SCK); // mosi, miso, sclk
+#define PI 3.1415926535
+
+void readn(byte *dst, unsigned int addr, int c) {
+    GD.__start(addr);
+    while (c--)
+        *dst++ = spimain.write(0);
+    GD.__end();
+}
+
+static byte coll[256];
+static void load_coll() {
+    while (GD.rd(VBLANK) == 0)  // Wait until vblank
+        ;
+    while (GD.rd(VBLANK) == 1)  // Wait until display
+        ;
+    while (GD.rd(VBLANK) == 0)  // Wait until vblank
+        ;
+    readn(coll, COLLISION, sizeof(coll));
+}
+
+void setup() {
+    int i;
+
+    GD.begin();
+
+    GD.wr(JK_MODE, 1);
+    GD.wr16(RAM_PAL, RGB(255,255,255));
+
+    // Use the 4 palettes:
+    // 0 pink, for J sprites
+    // 1 green, for K sprites
+    // 2 dark pink, J collisions
+    // 3 dark green, K collisions
+    for (i = 0; i < 256; i++) {
+        GD.wr16(RAM_SPRPAL + (0 * 512) + (i << 1), RGB(255, 0, 255));
+        GD.wr16(RAM_SPRPAL + (1 * 512) + (i << 1), RGB(0, 255, 0));
+        GD.wr16(RAM_SPRPAL + (2 * 512) + (i << 1), RGB(100, 0, 100));
+        GD.wr16(RAM_SPRPAL + (3 * 512) + (i << 1), RGB(0, 100, 0));
+    }
+}
+
+byte spr;
+static void polar(float th, int r, byte jk) {
+    // add 2 to the palette if this sprite is colliding
+    byte colliding = coll[spr] != 0xff;
+    GD.sprite(spr, 200 + int(r * sin(th)), 142 + int(r * cos(th)), 0, jk + (colliding ? 2 : 0), 0, jk);
+    spr++;
+}
+Timer timer;
+int main() {
+    
+    timer.start();
+    setup();
+    byte i;
+    float th;
+    while (1) {
+        spr = 0;
+        // draw the J sprites (pink)
+        for (i = 0; i < 5; i++) {
+            th = (((timer.read_us()+2147)/500) / 3000.) + 2 * PI * i / 5;
+            polar(th, 134, 0);
+        }
+        // draw the K sprites (green)
+        randomSeed(4);
+        for (i = 0; i < 17; i++) {
+            th = (((timer.read_us()+2147)/500) / float((rand()%2000)+1000)) + 2 * PI * i / 17;
+            polar(th, 134, 1);
+        }
+        load_coll();
+    }
+}
+