Contiki port for the Atmel AVR Raven board

2008-10-14 09:40:30 +00:00 · 2008-10-14 09:40:30 +00:00 · 0a961b2ada
commit 0a961b2ada
parent 3f394fe927
42 changed files with 5646 additions and 0 deletions
--- a/platform/avr-ravenlcd/beep.c
+++ b/platform/avr-ravenlcd/beep.c
@ -0,0 +1,93 @@
+/*
+ *  Copyright (c) 2008  Swedish Institute of Computer Science
+ *  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 following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  * Neither the name of the copyright holders nor the names of
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ */
+/**
+ * \file
+ *
+ * \brief
+ *      This file implements a beep function to emit a beep sound from Raven's
+ *      speaker.
+ *
+ * \author
+ *      Mike Vidales mavida404@gmail.com
+ *
+ */
+
+
+#include "beep.h"
+#include "key.h"
+
+/**
+ *  \addtogroup lcd
+ *  \{
+*/
+
+/*---------------------------------------------------------------------------*/
+
+/**
+ *  \brief Emits a beep from the Raven's buzzer.  This routine simply toggles a port pin
+ *  at an audio frequency, which causes a tone to be emitted from the Raven's speaker.
+ *  The beep consists of two tones at two different frequencies.  At the end, the beeper
+ *  port pin is kept low, which causes the speaker amplifier to shut down.
+*/
+void
+beep(void)
+{
+    uint8_t i;
+    volatile uint8_t j;
+
+    /* Turn on the power to the speaker. */
+    ENTER_DDR |= (1 << PE7);
+    ENTER_PUR |= (1 << PE7);
+
+    /* Setup port pin */
+    BEEP_DDR |= (1 << BEEP_BIT);
+
+    for (i=0;i<100;i++){
+        /* Toggle port pin */
+        BEEP_PIN |= (1 << BEEP_BIT);
+        /* Delay loop */
+        for (j=0;j<0xff;j++)
+            ;
+    }
+
+    for (i=0;i<100;i++){
+        /* Toggle port pin */
+        BEEP_PIN |= (1 << BEEP_BIT);
+        /* Delay loop */
+        for (j=0;j<0xa0;j++)
+            ;
+    }
+
+    /* Turn off speaker */
+    BEEP_PORT &= ~(1 << BEEP_BIT);
+    ENTER_PUR &= ~(1 << PE7);
+}
+
+/** \}   */