MHVLib
20111011
An efficiency oriented runtime library for AVR microcontrollers
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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