# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1361648087 0
# Node ID b58a34713be6cd533947832ef03c42a367bae104
# Parent  b88b2b0c03668ec961faed93913b3e59f94b528d
Added detection of devices that are already connected.

diff -r b88b2b0c0366 -r b58a34713be6 test.c
--- a/test.c	Sat Feb 23 19:10:59 2013 +0000
+++ b/test.c	Sat Feb 23 19:34:47 2013 +0000
@@ -487,13 +487,16 @@
     return timeout;
 }
 
+/**
+ * Return whether the bus is ready to be sampled. The application note claims
+ * that the SAMPLEBUS bit is cleared, but this does not seem to be the case.
+ */
 uint8_t samplebusready()
 {
     uint8_t result;
 
     result = max_read(MAX_REG_HCTL, NULL);
-
-    return !(result & MAX_HCTL_SAMPLEBUS);
+    return result & MAX_HCTL_SAMPLEBUS;
 }
 
 void samplebus()
@@ -677,6 +680,17 @@
     revision = max_read(MAX_REG_REVISION, &status);
     printf("Revision = %x\n", revision);
 
+    /* Sample the bus for any devices that are already connected. */
+
+    samplebus();
+
+    if (devicechanged())
+    {
+        devstate = MAX_DEVSTATE_CONNECTED;
+    }
+
+    /* Enter the main processing loop. */
+
     for (count = 0; count <= 65535; count++)
     {
         if (!PIN(MAX_INT))