| 1 | /*
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| 2 | Copyright (C) 2004 by Jasem Mutlaq
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| 3 |
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| 4 | This library is free software; you can redistribute it and/or
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| 5 | modify it under the terms of the GNU Lesser General Public
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| 6 | License as published by the Free Software Foundation; either
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| 7 | version 2.1 of the License, or (at your option) any later version.
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| 8 |
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| 9 | This library is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 12 | Lesser General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU Lesser General Public
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| 15 | License along with this library; if not, write to the Free Software
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| 16 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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| 17 |
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| 18 | */
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| 19 |
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| 20 | #ifndef _PPort_hpp_
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| 21 | #define _PPort_hpp_
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| 22 |
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| 23 | class port_t;
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| 24 |
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| 25 | /** To access and share the parallel port
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| 26 | between severa objects. */
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| 27 | class PPort {
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| 28 | public:
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| 29 | PPort();
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| 30 | PPort(int ioPort);
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| 31 | ~PPort();
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| 32 | /** set the ioport associated to the // port.
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| 33 | \return true if the binding was possible
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| 34 | */
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| 35 | bool setPort(int ioPort);
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| 36 | /** set a data bit of the // port.
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| 37 | \return false if IO port not set, or bit not registered by ID.
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| 38 | \param ID the identifier used to register the bit
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| 39 | \param stat the stat wanted for the given bit
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| 40 | \param bit the bit to set. They are numbered from 0 to 7.
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| 41 |
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| 42 | */
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| 43 | bool setBit(const void * ID,int bit,bool stat);
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| 44 | /** register a bit for object ID.
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| 45 | \param ID the identifier used to register the bit it should be the 'this' pointer.
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| 46 | \param bit the bit of the // port to register
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| 47 | \return false if the bit is already register with an
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| 48 | other ID, or if the // port is not initialised.
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| 49 | */
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| 50 | bool registerBit(const void * ID,int bit);
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| 51 | /** release a bit.
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| 52 | \param ID the identifier used to register the bit
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| 53 | \param bit the bit to register.
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| 54 | \return false if the bit was not registered by ID or
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| 55 | if the if the // port is not initialised.
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| 56 | */
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| 57 | bool unregisterBit(const void * ID,int bit);
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| 58 |
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| 59 | /** test if a bit is registerd.
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| 60 | \param ID the identifier used to register the bit
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| 61 | \param bit the bit to test.
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| 62 | \return false if the bit was not registered by ID or
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| 63 | if the if the // port is not initialised.
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| 64 | */
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| 65 | bool isRegisterBit(const void * ID,int bit) const;
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| 66 |
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| 67 | /** set the bits off the // port according to previous call to setBit().
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| 68 | */
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| 69 | bool commit();
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| 70 | private:
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| 71 | void reset();
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| 72 | unsigned char bitArray;
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| 73 | const void * assignedBit[8];
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| 74 | port_t * currentPort;
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| 75 | };
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| 76 | #endif
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