MHVLib  20111011
An efficiency oriented runtime library for AVR microcontrollers
A:/eclipse/mhvlib/MHV_EPP.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 #if 0
00028 
00032 #ifndef MHV_EPP_H_
00033 #define MHV_EPP_H_
00034 
00035 #include <MHV_io.h>
00036 
00037 enum mhv_epp_mode {
00038         MHV_EPP_MODE_INTERRUPT,
00039         MHV_EPP_MODE_POLLED
00040 };
00041 typedef enum mhv_epp_mode MHV_EPP_MODE;
00042 
00043 class MHV_EPP {
00044 private:
00045                 uint8_t                         _address;
00046                 MHV_EPP_MODE            _mode;
00047 
00048                 volatile uint8_t        *_dataDir;
00049                 volatile uint8_t        *_dataInput;
00050                 volatile uint8_t        *_dataOutput;
00051 
00052                 uint8_t                         _controlPrevious;
00053 
00054                 volatile uint8_t        *_controlDir;
00055                 volatile uint8_t        *_controlInput;
00056                 volatile uint8_t        *_controlOutput;
00057 
00058 public:
00059         MHV_EPP(MHV_EPP_MODE mode,
00060                         volatile uint8_t *dataDir, volatile uint8_t *dataInput, volatile uint8_t *dataOutput,
00061                         uint8_t dataBit, uint8_t dataPcInt,
00062                         volatile uint8_t *controlDir, volatile uint8_t *controlInput, volatile uint8_t *controlOutput,
00063                         uint8_t controlBit, uint8_t controlPcInt);
00064         void interruptReset();
00065         void interruptStrobe(bool address);
00066         void releaseStrobe(bool address);
00067         void poll();
00068 
00069 protected:
00070         // Subclasses must implement these
00071         virtual void _reset()=0;
00072         virtual uint8_t _read(bool address)=0;
00073         virtual void _write(bool address, uint8_t data)=0;
00074 };
00075 
00076 #endif /* MHV_EPP_H_ */
00077 #endif