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49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
/*
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i2c.h - esp8266 i2c bit-banging library
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Copyright (c) 2014 Ivan Grokhotkov. All rights reserved.
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This file is part of the esp8266 core for Arduino environment.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef I2C_H
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#define I2C_H
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#include <stdint.h>
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void i2c_init(int sda_pin, int scl_pin);
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void i2c_freq(int freq_hz);
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void i2c_release();
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void i2c_start();
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void i2c_stop();
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void i2c_set_ack(int ack);
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int i2c_get_ack();
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uint8_t i2c_read(void);
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void i2c_write(uint8_t val);
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size_t i2c_master_read_from(int address, uint8_t* data, size_t size, bool sendStop);
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size_t i2c_master_write_to(int address, const uint8_t* data, size_t size, bool sendStop);
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// todo: implement i2c slave functions
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//
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// void i2c_slave_setAddress(uint8_t);
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// int i2c_slave_transmit(const uint8_t* data, size_t size);
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// void i2c_slave_attach_rx_callback( void (*)(uint8_t*, int) );
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// void i2c_slave_attach_tx_callback( void (*)(void) );
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#endif//I2C_H
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