Donatien Garnier / Mbed 2 deprecated RSEDP_DPDemo

RFID tracking with mbed & RS-EDP reference design

Dependencies:   RWDModule mbed SDCard

ui/beep.cpp@0:fd63457452f4, 2010-07-28 (annotated)

Committer:
donatien
Date:
Wed Jul 28 11:02:36 2010 +0000
Revision:
0:fd63457452f4

        

        
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/*





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Copyright (c) 2010 ARM Limited





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Permission is hereby granted, free of charge, to any person obtaining a copy





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of this software and associated documentation files (the "Software"), to deal





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in the Software without restriction, including without limitation the rights





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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell





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copies of the Software, and to permit persons to whom the Software is





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furnished to do so, subject to the following conditions:





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    10

 





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The above copyright notice and this permission notice shall be included in





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all copies or substantial portions of the Software.





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    13

 





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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR





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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,





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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE





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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER





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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,





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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN





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THE SOFTWARE.





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*/





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#include "mbed.h"





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#include "beep.h"





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Beep::Beep(PinName pin) : m_ticker(), m_timeout(), m_out(pin)





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{





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  m_part = NULL;





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  m_pos = 0;





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}





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Beep::~Beep()





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{





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}





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//Tones data is { freq1 (Hz), length1 (s), ... } 





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//For a pause, frequency is set to 0





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//If length=0, end of tone





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const float Beep::Tones[][8] = { {523.25, 0.025, 783.99, 0.075, 0, 0}, //TONE_OK,





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                          {440, 0.050, 0, 0}, //TONE_INFO,





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                          {220, 0.100, 0, 0}, //TONE_WARN,





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                          {110, 0.250, 0, 0}  //TONE_ERR





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                        };





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void Beep::beep(BEEP_TONE tone) //New beep





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{





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  m_ticker.detach(); //Stop previous beep is existing





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  m_timeout.detach();





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  m_part = (float*) Beep::Tones[tone]; //Select tone buf





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  m_pos = 0;





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  beepNote(); //Start with first note





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}





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void Beep::beepNote()





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{





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  float freq = m_part[m_pos]; //Setup frequency and length





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  float len = m_part[m_pos+1];





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  m_pos+=2;





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  if(len==0)





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    beepDone();





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  m_timeout.attach(this, &Beep::beepDone, len); //Setup timeout for end of note





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  if(freq>0)





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    m_ticker.attach(this, &Beep::beepTick, .5/freq); //Setup ticker for pin toggling at right freq





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}





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void Beep::beepTick()





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{





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  m_out.write(!m_out.read()); //Toggle output pin





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}





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void Beep::beepDone()





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{





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  m_ticker.detach(); //Note is done, stop toggling output pin





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}