53 lines
2.0 KiB
C
53 lines
2.0 KiB
C
#include "defines.h"
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#include <avr/io.h>
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#define I2C_START_WRITE(device_addr) \
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{ \
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if (i2c_start((device_addr << 1) | 0x00)) { \
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return 1; \
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} \
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}
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#define I2C_START_READ(device_addr) \
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{ \
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if (i2c_start((device_addr << 1) | 0x01)) { \
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return 1; \
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} \
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}
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#ifndef i2c_H
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#define i2c_H
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#define TWSR TWSR0
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#define TWDR TWDR0
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#define TWBR TWBR0
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#define TWCR TWCR0
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void i2c_init();
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uint8_t i2c_start(uint8_t address);
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uint8_t write_one_byte(uint8_t device_addr, uint8_t register_addr,
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uint8_t data);
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uint8_t write_n_bytes(uint8_t device_addr, uint8_t register_addr, uint8_t *data,
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uint8_t n_bytes);
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uint8_t read_one_byte_16bit_addr_no_err_register(uint8_t device_addr, uint16_t register_addr);
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uint8_t read_one_byte_16bit_addr(uint8_t device_addr, uint16_t register_addr,
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uint8_t *data);
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uint8_t read_n_bytes_16bit_addr(uint8_t device_addr, uint16_t register_addr, uint8_t *data,
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uint8_t n_bytes);
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uint8_t read_one_byte_no_err_register(uint8_t device_addr, uint8_t register_addr);
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uint8_t read_one_byte(uint8_t device_addr, uint8_t register_addr,
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uint8_t *data);
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uint8_t read_n_bytes(uint8_t device_addr, uint8_t register_addr, uint8_t *data,
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uint8_t n_bytes);
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void i2c_stop();
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void i2c_scan();
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uint8_t i2c_read_ack();
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uint8_t i2c_read_nack();
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uint8_t i2c_write(uint8_t data);
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#endif |