MHVLib  20111011
An efficiency oriented runtime library for AVR microcontrollers
A:/eclipse/mhvlib/MHV_ADC.h
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00001 /*
00002  * Copyright (c) 2011, Make, Hack, Void Inc
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions are met:
00007  *  * Redistributions of source code must retain the above copyright
00008  *    notice, this list of conditions and the following disclaimer.
00009  *  * Redistributions in binary form must reproduce the above copyright
00010  *    notice, this list of conditions and the following disclaimer in the
00011  *    documentation and/or other materials provided with the distribution.
00012  *  * Neither the name of the Make, Hack, Void nor the
00013  *    names of its contributors may be used to endorse or promote products
00014  *    derived from this software without specific prior written permission.
00015  *
00016  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
00017  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
00018  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00019  * DISCLAIMED. IN NO EVENT SHALL MAKE, HACK, VOID BE LIABLE FOR ANY
00020  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
00021  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
00022  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
00023  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00024  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00025  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00026  */
00027 
00028 #ifndef MHV_ADC_H_
00029 #define MHV_ADC_H_
00030 
00031 #include <MHV_io.h>
00032 #include <MHV_AD.h>
00033 
00034 
00035 #define MHV_ADC_ASSIGN_INTERRUPT(__mhvADCManager) \
00036 ISR(ADC_vect) { \
00037         __mhvADCManager.adc(); \
00038 }
00039 
00043 #define MHV_ADC_BUFFER_CREATE(_mhvADCBufferName, _mhvADCBufferCount) \
00044 MHV_EVENT_ADC _mhvADCBufferName[_mhvADCBufferCount];
00045 
00046 class MHV_ADCListener {
00047 public:
00048         virtual void adc(uint8_t adcChannel, uint16_t adcValue) =0;
00049 };
00050 
00051 struct mhv_eventADC {
00052         uint8_t                                 channel;
00053         MHV_ADCListener                 *listener;
00054 };
00055 typedef struct mhv_eventADC     MHV_EVENT_ADC;
00056 
00057 class MHV_ADC {
00058 protected:
00059         uint16_t                _adcValue;
00060         int8_t                  _adcChannel;
00061         MHV_EVENT_ADC   *_adcs;
00062         uint8_t                 _adcCount;
00063 
00064 
00065 public:
00066         MHV_ADC(MHV_EVENT_ADC *adcs, uint8_t adcCount);
00067 
00068 // ADC
00069         void adc();
00070         void registerListener(uint8_t channel, MHV_ADCListener *listener);
00071         void deregisterListener(uint8_t channel);
00072         void enable();
00073         void disable();
00074         uint16_t busyRead(uint8_t channel, uint8_t reference);
00075         void asyncRead(uint8_t channel, uint8_t reference);
00076         void setPrescaler(MHV_AD_PRESCALER prescaler);
00077 
00078         void handleEvents();
00079 };
00080 
00081 #endif /* MHV_ADC_H_ */