I2C Driver

Overview

Inter-Integrated Circuit (I2C) driver.

This module provides functions to configure and control I2C input/output and interrupt behavior.

Usage & Initialization

This is an example show how to instantiate I2C Driver with i2c_instance_t.

#include "i2c/i2c.h"
 
#define I2C_SLAVE_ADDR      0x50>>1
#define I2C_FREQ            100000
#define I2C_CTRL_HZ         SYSTEM_CLINT_HZ
#define I2C_CTRL            (i2c_hwreg_t *)SYSTEM_I2C_0_IO_CTRL
 
i2c_instance_t I2C = {
    .hwreg                  = I2C_CTRL,
    .slaveAddress           = I2C_SLAVE_ADDR,
    .samplingClockDivider   = 3,
    .timeout                = I2C_CTRL_HZ/1000,
    .tsuDat                 = I2C_CTRL_HZ/(I2C_FREQ*5),
    .tLow                   = I2C_CTRL_HZ/(I2C_FREQ*2),
    .tHigh                  = I2C_CTRL_HZ/(I2C_FREQ*2),
    .tBuf                   = I2C_CTRL_HZ/(I2C_FREQ),
},
};
 
i2c_applyConfig(&I2C);

See also

Example I2C Master Demo - Learn how to use the driver in Master mode

Example I2C Slave Demo - Learn how to use the driver in Slave mode

Example I2C EEPROM Demo - Learn how to use the driver with an EEPROM

Topics
	API Functions
	Function definitions for I2C driver.
	Data Structures
	Structs used by the driver.
	Data Types
	Enums used by the driver.
	Register Definitions
	Register bitmasks and offsets.