Initial file tidy-up. Created app_xua_simple.

examples/app_xua_simple/src/app_xua_simple.xc

@@ -0,0 +1,68 @@
+
+/* A very simple example of a USB audio application (and as such is un-verified)
+ * 
+ * It uses some tedious blocks from the lib_xua i.e. Endpoint 0, whilst re-implementing simple versions of others i.e. buffering 
+ *
+ */
+
+#include <xs1.h>
+#include <platform.h>
+
+#include "xud_device.h"
+#include "xua.h"
+
+
+void OutBuffer(chanend c_aud_out)
+{
+    while(1)
+    {
+
+    }
+}
+
+void I2S()
+{
+    while(1)
+    {
+
+    }
+}
+
+
+
+/* Endpoint type tables - informs XUD what the transfer types for each Endpoint in use and also
+ * if the endpoint wishes to be informed of USB bus resets
+ */
+XUD_EpType epTypeTableOut[] = {XUD_EPTYPE_CTL | XUD_STATUS_ENABLE};
+XUD_EpType epTypeTableIn[] =   {XUD_EPTYPE_CTL | XUD_STATUS_ENABLE, XUD_EPTYPE_ISO};
+
+int main()
+{
+    /* Channels for lib_xud */
+    chan c_ep_out[2];
+    chan c_ep_in[1];
+
+    chan c_aud_ctl;
+
+    par
+    {
+        /* Low level USB device layer core */ 
+        on tile[1]: XUD_Main(c_ep_out, 2, c_ep_in, 1,
+                      null, epTypeTableOut, epTypeTableIn, 
+                      null, null, -1 , XUD_SPEED_HS, XUD_PWR_BUS);
+        
+        /* Endpoint 0 core from lib_xua */
+        /* Note, since we are not using many features we pass in null for quite a few params.. */
+        on tile[1]: XUA_Endpoint0(c_ep_out[0], c_ep_in[0], c_aud_ctl, null, null, null, null);
+
+        /* Our own simple buffering and I2S cores */
+        on tile[1]: OutBuffer(c_ep_out[1]);
+
+        /* Our own simple I2S driver core */
+        on tile[1]: I2S();
+
+    }
+    return 0;
+}
+
+