1 files changed, 149 insertions, 8 deletions

@@ -5,18 +5,159 @@
  * of the MIT license.  See the LICENSE file for details.
  */
 #include "link.h"
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <malloc.h>
 
-u32 waitForButtons(u32 mask)
+//from my tests 50us seems to be the lowest
+//safe si transfer delay in between calls
+#define SI_TRANS_DELAY 50
+
+static u8* resbuf;
+static u8* cmdbuf;
+
+void initLink()
+{
+  cmdbuf = memalign(32,32);
+  resbuf = memalign(32,32);
+}
+
+static volatile u32 transval = 0;
+void transcb(s32 chan, u32 ret)
+{
+  transval = 1;
+}
+
+static volatile u32 resval = 0;
+void acb(s32 res, u32 val)
+{
+  resval = val;
+}
+
+void doreset()
+{
+  cmdbuf[0] = 0xFF; //reset
+  transval = 0;
+  SI_Transfer(1, cmdbuf, 1, resbuf, 3, transcb, SI_TRANS_DELAY);
+
+  while (transval == 0);
+}
+
+void getstatus()
 {
-  for (;;)
+  cmdbuf[0] = 0; //status
+  transval = 0;
+  SI_Transfer(1, cmdbuf, 1, resbuf, 3, transcb, SI_TRANS_DELAY);
+
+  while (transval == 0);
+}
+
+u32 recv()
+{
+  memset(resbuf,0,32);
+  cmdbuf[0]=0x14; //read
+  transval = 0;
+  SI_Transfer(1, cmdbuf, 1, resbuf, 5, transcb, SI_TRANS_DELAY);
+
+  while (transval == 0);
+  printf("%08lx\n", *(vu32*)resbuf);
+  return *(vu32*)resbuf;
+}
+
+void send(u32 msg)
+{
+  cmdbuf[0] = 0x15;
+  cmdbuf[1] = (msg >> 0) & 0xFF;
+  cmdbuf[2] = (msg >> 8) & 0xFF;
+  cmdbuf[3] = (msg >> 16) & 0xFF;
+  cmdbuf[4] = (msg >> 24) & 0xFF;
+
+  transval = 0;
+  resbuf[0] = 0;
+  SI_Transfer(1, cmdbuf, 5, resbuf, 1, transcb, SI_TRANS_DELAY);
+
+  while (transval == 0);
+}
+
+u32 getMsg()
+{
+  u32 val = 0;
+  while (val == 0)
   {
-    PAD_ScanPads();
-    VIDEO_WaitVSync();
+    val = __builtin_bswap32(recv());
+    sleep(1);
+  }
 
-    u32 btns = PAD_ButtonsDown(0);
-    if (btns & mask)
+  send(0);
+  while (recv()!=0) {sleep(1);}
+  send(0);
+
+  return val;
+}
+
+void getMsgArr(u32* arr, int len)
+{
+  for (int i=0; i<len; i++)
+  {
+    *(vu32*)(arr+i) = __builtin_bswap32(recv());
+    usleep(500000);
+  }
+}
+
+void sendMsg(u32 msg)
+{
+  while (recv()==0) {sleep(1);}
+  send(msg);
+  while (recv()!=0) {sleep(1);}
+  send(0);
+}
+
+void waitForGBA()
+{
+  resval = 0;
+
+  do
+  {
+    SI_GetTypeAsync(1, acb);
+
+    for (;;)
     {
-      return btns;
+      if (resval)
+      {
+        if (resval == 0x80 || resval & 8)
+        {
+          resval = 0;
+          SI_GetTypeAsync(1, acb);
+        } else if (resval)
+        {
+          break;
+        }
+      }
     }
-  }
+  } while (!(resval & SI_GBA));
+}
+
+void waitForBIOS()
+{
+  resbuf[2]=0;
+
+  do
+  {
+    doreset();
+  } while (!(resbuf[1] > 4));
+}
+
+void waitForGame()
+{
+  do
+  {
+    doreset();
+  } while ((resbuf[0] != 0) || !(resbuf[2] & 0x10));
+}
+
+void waitForAck()
+{
+  while (recv() != 0) {sleep(1);};
+  send(0);
 }