mh
/
qmk_firmware
mirror of https://github.com/qmk/qmk_firmware/


								#ifndef I2C_H

								#define I2C_H


								#include <stdint.h>


								#ifndef F_CPU

								#define F_CPU 16000000UL

								#endif


								#define I2C_READ 1

								#define I2C_WRITE 0


								#define I2C_ACK 1

								#define I2C_NACK 0


								#define SLAVE_BUFFER_SIZE 0x10


								// i2c SCL clock frequency

								#define SCL_CLOCK  100000L


								extern volatile uint8_t i2c_slave_buffer[SLAVE_BUFFER_SIZE];


								void i2c_master_init(void);

								uint8_t i2c_master_start(uint8_t address);

								void i2c_master_stop(void);

								uint8_t i2c_master_write(uint8_t data);

								uint8_t i2c_master_read(int);

								void i2c_reset_state(void);

								void i2c_slave_init(uint8_t address);


								#endif