From 16af4b953306063c2aed52ab2ecde07e0bc6b5e4 Mon Sep 17 00:00:00 2001
From: James <james.mckenzie@citrix.com>
Date: Mon, 14 Oct 2013 19:06:11 +0100
Subject: works!

---
 src/sdram.c | 65 ++++++++++++++++++++++++++++++++++++-------------------------
 1 file changed, 38 insertions(+), 27 deletions(-)

(limited to 'src')

diff --git a/src/sdram.c b/src/sdram.c
index 60b9459..91bdad1 100644
--- a/src/sdram.c
+++ b/src/sdram.c
@@ -9,46 +9,57 @@
 
 #define msleep(msec) usleep(1000*msec);
 
+#ifdef PIO_0_BASE
 pio_write (unsigned int data)
 {
   IOWR (PIO_0_BASE, 0, data);
 }
+#endif
 
-
-static void
-show_score (int score)
+void
+ebb_write (unsigned int addr, uint8_t data)
 {
-  // int to seven segment lookup: MSB dp g f e d c b a LSB
-  const uint8_t lookup[10] =
-    { 0x3F, 0x6, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x7, 0x7F, 0x6F };
-
-  uint8_t ss = 0;
+  IOWR (ASYNC_8BIT_BUS_ADAPTER_0_BASE, addr, data);
+}
 
-  // show negative with DP
-  if (score < 0)
-    {
-      ss |= 0x80;
-      score = -score;
-    }
+uint8_t
+ebb_read (unsigned int addr)
+{
+  return (uint8_t) IORD (ASYNC_8BIT_BUS_ADAPTER_0_BASE, addr);
+}
 
-  if (score > 9)
-    score = 9;
 
-  ss |= lookup[score];
 
-  pio_write (ss);
-}
 int
 main (void)
 {
   int i;
   printf ("Working...\n");
-  for (;;) {
-  for (i=-9;i<10;++i)
-  {
-  printf("%d\n",i);
-  show_score(i);
-  msleep(200);
-  }
- }
+  srand (12833213);
+  for (;;)
+    {
+      printf ("W:");
+      printf(" xx");
+      printf(" xx");
+      printf(" xx");
+      for (i = 0; i < 32; ++i)
+        {
+          uint8_t v;
+          v = rand () & 0xff;
+          ebb_write (i, v);
+          printf (" %02x", v);
+        }
+      printf ("\n");
+      msleep (1000);
+      printf ("R:");
+      printf (" %02x", ebb_read (0));
+      printf (" %02x", ebb_read (0));
+      printf (" %02x", ebb_read (0));
+      for (i = 0; i < 32; ++i)
+        {
+          printf (" %02x", ebb_read (i));
+        }
+      printf ("\n");
+      msleep (1000);
+    }
 }
-- 
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