Diff: ui/beep.cpp

Revision:

0:fd63457452f4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ui/beep.cpp	Wed Jul 28 11:02:36 2010 +0000
@@ -0,0 +1,75 @@
+/*
+Copyright (c) 2010 ARM Limited
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+ 
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+ 
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include "mbed.h"
+#include "beep.h"
+
+Beep::Beep(PinName pin) : m_ticker(), m_timeout(), m_out(pin)
+{
+  m_part = NULL;
+  m_pos = 0;
+}
+
+Beep::~Beep()
+{
+
+}
+
+//Tones data is { freq1 (Hz), length1 (s), ... } 
+//For a pause, frequency is set to 0
+//If length=0, end of tone
+const float Beep::Tones[][8] = { {523.25, 0.025, 783.99, 0.075, 0, 0}, //TONE_OK,
+                          {440, 0.050, 0, 0}, //TONE_INFO,
+                          {220, 0.100, 0, 0}, //TONE_WARN,
+                          {110, 0.250, 0, 0}  //TONE_ERR
+                        };
+  
+void Beep::beep(BEEP_TONE tone) //New beep
+{
+  m_ticker.detach(); //Stop previous beep is existing
+  m_timeout.detach();
+  m_part = (float*) Beep::Tones[tone]; //Select tone buf
+  m_pos = 0;
+  beepNote(); //Start with first note
+}
+
+void Beep::beepNote()
+{
+  float freq = m_part[m_pos]; //Setup frequency and length
+  float len = m_part[m_pos+1];
+  m_pos+=2;
+  if(len==0)
+    beepDone();
+  m_timeout.attach(this, &Beep::beepDone, len); //Setup timeout for end of note
+  if(freq>0)
+    m_ticker.attach(this, &Beep::beepTick, .5/freq); //Setup ticker for pin toggling at right freq
+}
+
+void Beep::beepTick()
+{
+  m_out.write(!m_out.read()); //Toggle output pin
+}
+
+void Beep::beepDone()
+{
+  m_ticker.detach(); //Note is done, stop toggling output pin
+}
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