#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