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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