1 files changed, 58 insertions, 0 deletions
diff --git a/utility/rand.c b/utility/rand.c
new file mode 100644
index 0000000..a73e8d9
--- /dev/null
+++ b/utility/rand.c
@@ -0,0 +1,58 @@
+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support 
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+//------------------------------------------------------------------------------
+//         Global Functions
+//------------------------------------------------------------------------------
+
+static unsigned long int next = 1;
+
+//------------------------------------------------------------------------------
+//         Global Functions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+/// Initialize the seed for rand generator.
+/// \param seed rand initiation seed
+//------------------------------------------------------------------------------
+void srand(unsigned int seed)
+{
+    next = seed;
+}
+
+//------------------------------------------------------------------------------
+/// Return a random number, maxinum assumed to be 65536
+//------------------------------------------------------------------------------
+
+int rand(void) 
+{
+    next = next * 1103515245 + 12345;
+    return (unsigned int)(next/131072) % 65536;
+}
+