mirror of
https://github.com/Keychron/qmk_firmware.git
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ff0cb0cf9d
* Add GPL3 header to avr i2c files * Add for i2c_slave as well * Fix formatting of license header
47 lines
1.7 KiB
C
Executable File
47 lines
1.7 KiB
C
Executable File
/* Copyright (C) 2019 Elia Ritterbusch
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+
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* This program 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 program 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 this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/* Library made by: g4lvanix
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* Github repository: https://github.com/g4lvanix/I2C-master-lib
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*/
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#ifndef I2C_MASTER_H
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#define I2C_MASTER_H
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#define I2C_READ 0x01
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#define I2C_WRITE 0x00
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typedef int16_t i2c_status_t;
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#define I2C_STATUS_SUCCESS (0)
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#define I2C_STATUS_ERROR (-1)
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#define I2C_STATUS_TIMEOUT (-2)
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#define I2C_TIMEOUT_IMMEDIATE (0)
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#define I2C_TIMEOUT_INFINITE (0xFFFF)
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void i2c_init(void);
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i2c_status_t i2c_start(uint8_t address, uint16_t timeout);
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i2c_status_t i2c_write(uint8_t data, uint16_t timeout);
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int16_t i2c_read_ack(uint16_t timeout);
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int16_t i2c_read_nack(uint16_t timeout);
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i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout);
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i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout);
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i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
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i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
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void i2c_stop(void);
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#endif // I2C_MASTER_H
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