i2c.h File Reference

#include <stddef.h>
#include <stdint.h>

Go to the source code of this file.

Macros
#define	I2C_MAX_BUS   5
	Maximum I2C bus identifier. Default is 5 for a total of 6 busses. This can be increased by the user for special cases. More...
#define	I2C_BUFFER_SIZE   128
	size of i2c buffer in bytes for writing to registers. Only increase if you know what you are doing. More...

Functions
int	rc_i2c_init (int bus, uint8_t devAddr)
	Initializes a bus and sets it to talk to a particular device address. More...
int	rc_i2c_close (int bus)
	Closes an I2C bus. More...
int	rc_i2c_set_device_address (int bus, uint8_t devAddr)
	Changes the device address the bus is configured to talk to. More...
int	rc_i2c_read_byte (int bus, uint8_t regAddr, uint8_t *data)
	Reads a single byte from a device register. More...
int	rc_i2c_read_bytes (int bus, uint8_t regAddr, size_t count, uint8_t *data)
	Reads multiple bytes from a device register. More...
int	rc_i2c_read_word (int bus, uint8_t regAddr, uint16_t *data)
	Reads a single word (16 bits) from a device register. More...
int	rc_i2c_read_words (int bus, uint8_t regAddr, size_t count, uint16_t *data)
	Reads multiple words (16 bytes each) from a device register. More...
int	rc_i2c_write_byte (int bus, uint8_t regAddr, uint8_t data)
	Writes a single byte to a specified register address. More...
int	rc_i2c_write_bytes (int bus, uint8_t regAddr, size_t count, uint8_t *data)
	Writes multiple bytes to a specified register address. More...
int	rc_i2c_write_word (int bus, uint8_t regAddr, uint16_t data)
	Writes a single word (16 bits) to a specified register address. More...
int	rc_i2c_write_words (int bus, uint8_t regAddr, size_t count, uint16_t *data)
	Writes multiple words (16 bits each) to a specified register address. More...
int	rc_i2c_send_bytes (int bus, size_t count, uint8_t *data)
	Sends exactly user-defined data without prepending a register address. More...
int	rc_i2c_send_byte (int bus, uint8_t data)
	Sends exactly user-defined data without prepending a register address. More...
int	rc_i2c_lock_bus (int bus)
	Locks the bus so other threads in the process know the bus is in use. More...
int	rc_i2c_unlock_bus (int bus)
	Unlocks a bus to indicate to other threads in the process that the bus is now free. More...
int	rc_i2c_get_lock (int bus)
	Fetches the current lock state of the bus. More...
int	rc_i2c_get_fd (int bus)
	Gets file descriptor. More...