From cce17fefd6e042c0a40a9af3bdfdbb6bc11ded34 Mon Sep 17 00:00:00 2001
From: root <root@lab.panaceas.james.local>
Date: Fri, 11 Oct 2013 09:38:08 +0100
Subject: 800x600

---
 software/pong3/GPU.h   | 29 ++++++++++++++++++++++++++++
 software/pong3/pong3.c | 52 ++++++++++++++++++++++----------------------------
 2 files changed, 52 insertions(+), 29 deletions(-)
 create mode 100644 software/pong3/GPU.h

(limited to 'software/pong3')

diff --git a/software/pong3/GPU.h b/software/pong3/GPU.h
new file mode 100644
index 0000000..3883381
--- /dev/null
+++ b/software/pong3/GPU.h
@@ -0,0 +1,29 @@
+/*
+ * GPU.h
+ *
+ *  Created on: Oct 11, 2013
+ *      Author: root
+ */
+
+#ifndef GPU_H_
+#define GPU_H_
+
+#define GPU_OFFSET		0x80
+#if 0
+#define GPU_WIDTH 		640
+#define GPU_HEIGHT		480
+#else
+#define GPU_WIDTH 		800
+#define GPU_HEIGHT		600
+#endif
+
+#define GPU_REG_BLANK		0x0
+#define GPU_REG_SPRITE_X	0x1
+#define GPU_REG_SPRITE_Y	0x2
+#define GPU_REG_BAT0_Y		0x3
+#define GPU_REG_BAT1_Y		0x4
+#define GPU_REG_SPRITE_COLOUR	0x5
+#define GPU_REG_SPRITE_BASE	0x10
+ 
+
+#endif /* GPU_H_ */
diff --git a/software/pong3/pong3.c b/software/pong3/pong3.c
index 0e88ac8..39ee99c 100644
--- a/software/pong3/pong3.c
+++ b/software/pong3/pong3.c
@@ -3,10 +3,14 @@
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
+#include <stdint.h>
 #include "system.h"
 
+#include "GPU.h"
+
 #define msleep(msec) usleep(1000*msec);
 
+ 
 static void
 gpu_write (unsigned int reg, unsigned int data)
 {
@@ -16,27 +20,17 @@ gpu_write (unsigned int reg, unsigned int data)
 static void
 load_sprite (void)
 {
+  const uint16_t sprite[16]={ 0x00C0, 0x03E0, 0x0FF8, 0x1FFE, 0x3FC7, 0x3F83, 0x3933, 0x3987, 0x3D37, 0x3D37, 0x3D87, 0x3FFF, 0x1FFE, 0x07F8, 0x01E0, 0x00C0 };
+  const unsigned int n=sizeof(sprite)/sizeof(uint16_t);
+  unsigned int i;
+
   //                      RRR GGG BBB
   // set the sprite color 111 010 000 - orange
-  gpu_write (5, 0x01D0);
+  gpu_write (GPU_REG_SPRITE_COLOUR, 0x01D0);
 
   // squirt the bromium logo into the sprite
-  gpu_write (0x10, 0x00C0);
-  gpu_write (0x11, 0x03E0);
-  gpu_write (0x12, 0x0FF8);
-  gpu_write (0x13, 0x1FFE);
-  gpu_write (0x14, 0x3FC7);
-  gpu_write (0x15, 0x3F83);
-  gpu_write (0x16, 0x3933);
-  gpu_write (0x17, 0x3987);
-  gpu_write (0x18, 0x3D37);
-  gpu_write (0x19, 0x3D37);
-  gpu_write (0x1a, 0x3D87);
-  gpu_write (0x1b, 0x3FFF);
-  gpu_write (0x1c, 0x1FFE);
-  gpu_write (0x1d, 0x07F8);
-  gpu_write (0x1e, 0x01E0);
-  gpu_write (0x1f, 0x00C0);
+  for (i=0;i<n;++i) 
+	  gpu_write (GPU_REG_SPRITE_BASE+i,sprite[i]);
 }
 
 
@@ -83,10 +77,10 @@ find_intersection (int x, int y, int xd, int yd, int t)
       x += xd;
       y += yd;
 
-      if (squish (&y, 0, 480))
+      if (squish (&y, 0, GPU_HEIGHT))
         yd = -yd;
 
-      if (squish (&x, 0, 640))
+      if (squish (&x, 0, GPU_WIDTH))
         xd = -xd;
     }
 
@@ -118,7 +112,7 @@ main (void)
       yd = 1;
 
       dbat0 = find_intersection (x + xd, y + yd, xd, yd, 0);
-      dbat1 = find_intersection (x + xd, y + yd, xd, yd, 639);
+      dbat1 = find_intersection (x + xd, y + yd, xd, yd, GPU_WIDTH-1);
 
       while (!missed)
         {
@@ -126,10 +120,10 @@ main (void)
           y += yd;
 
 
-          if (squish (&y, 0, 480))
+          if (squish (&y, 0, GPU_HEIGHT))
             yd = -yd;
 
-          if (squish (&x, 0, 640))
+          if (squish (&x, 0, GPU_WIDTH))
             {
               xd = (rand () % 3) + 1;
               if (x)
@@ -140,13 +134,13 @@ main (void)
               if (x)
                 {
                   dbat0 = find_intersection (x + xd, y + yd, xd, yd, 0);
-                  dbat1 = 480 / 2;
+                  dbat1 = GPU_HEIGHT / 2;
                 }
               else
                 {
-                  dbat0 = 480 / 2;
+                  dbat0 = GPU_HEIGHT / 2;
 
-                  dbat1 = find_intersection (x + xd, y + yd, xd, yd, 639);
+                  dbat1 = find_intersection (x + xd, y + yd, xd, yd, GPU_WIDTH-1);
                 }
             }
 
@@ -154,10 +148,10 @@ main (void)
           move_bat (&bat1, dbat1);
 
 
-          gpu_write (1, x + 0x80);
-          gpu_write (2, y + 0x80);
-          gpu_write (3, bat0 + 0x80);
-          gpu_write (4, bat1 + 0x80);
+          gpu_write (1, x + GPU_OFFSET);
+          gpu_write (2, y + GPU_OFFSET);
+          gpu_write (3, bat0 + GPU_OFFSET);
+          gpu_write (4, bat1 + GPU_OFFSET);
 
           gpu_write (0, 0);
 
-- 
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