53 lines
1.7 KiB
C++
Executable File
53 lines
1.7 KiB
C++
Executable File
/* Arduino SoftI2cMaster Library
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* Copyright (C) 2009 by William Greiman
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*
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* This file is part of the Arduino SoftI2cMaster Library
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*
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* This Library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This Library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the Arduino SoftI2cMaster Library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#ifndef SOFT_I2C_MASTER
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#define SOFT_I2C_MASTER
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#include <TwoWireBase.h>
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// delay used to tweek signals
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#define I2C_DELAY_USEC 10
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class SoftI2cMaster : public TwoWireBase {
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uint8_t sclPin_;
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uint8_t sdaPin_;
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public:
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/** init bus */
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void init(uint8_t sclPin, uint8_t sdaPin);
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/** read a byte and send Ack if last is false else Nak to terminate read */
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uint8_t read(uint8_t last);
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/** send new address and read/write bit without stop */
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uint8_t restart(uint8_t addressRW);
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/** issue a start condition for i2c address with read/write bit */
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uint8_t start(uint8_t addressRW);
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/** issue a stop condition */
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void stop(void);
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/** write byte and return true for Ack or false for Nak */
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uint8_t write(uint8_t b);
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/** write byte and return true for Ack or false for Nak */
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uint8_t ldacwrite(uint8_t b, uint8_t);
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};
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#endif //SOFT_I2C_MASTER
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