i2c_master.h File Reference

SAM SERCOM I2C Master Driver.

Copyright (c) 2012-2018 Microchip Technology Inc. and its subsidiaries.

#include "i2c_common.h"
#include <sercom.h>
#include <pinmux.h>
#include <sercom_interrupt.h>

Data Structures
struct	i2c_master_config
	Configuration structure for the I2C Master device. More...
struct	i2c_master_module
	SERCOM I2C Master driver software device instance structure. More...
struct	i2c_master_packet
	I2C master packet for read/write. More...

Macros
#define	PINMUX_DEFAULT   0

Enumerations
enum	i2c_master_baud_rate {   I2C_MASTER_BAUD_RATE_100KHZ = 100,   I2C_MASTER_BAUD_RATE_400KHZ = 400 }
	I2C frequencies. More...
enum	i2c_master_callback {   I2C_MASTER_CALLBACK_WRITE_COMPLETE = 0,   I2C_MASTER_CALLBACK_READ_COMPLETE = 1,   I2C_MASTER_CALLBACK_ERROR = 2 }
	Callback types. More...
enum	i2c_master_inactive_timeout {   I2C_MASTER_INACTIVE_TIMEOUT_DISABLED = SERCOM_I2CM_CTRLA_INACTOUT(0),   I2C_MASTER_INACTIVE_TIMEOUT_55US = SERCOM_I2CM_CTRLA_INACTOUT(1),   I2C_MASTER_INACTIVE_TIMEOUT_105US = SERCOM_I2CM_CTRLA_INACTOUT(2),   I2C_MASTER_INACTIVE_TIMEOUT_205US = SERCOM_I2CM_CTRLA_INACTOUT(3) }
	Values for inactive bus time-out. More...
enum	i2c_master_interrupt_flag {   I2C_MASTER_INTERRUPT_WRITE = 0,   I2C_MASTER_INTERRUPT_READ = 1 }
	Interrupt flags. More...
enum	i2c_master_start_hold_time {   I2C_MASTER_START_HOLD_TIME_DISABLED = SERCOM_I2CM_CTRLA_SDAHOLD(0),   I2C_MASTER_START_HOLD_TIME_50NS_100NS = SERCOM_I2CM_CTRLA_SDAHOLD(1),   I2C_MASTER_START_HOLD_TIME_300NS_600NS = SERCOM_I2CM_CTRLA_SDAHOLD(2),   I2C_MASTER_START_HOLD_TIME_400NS_800NS = SERCOM_I2CM_CTRLA_SDAHOLD(3) }
	Values for hold time after start bit. More...

Functions
Lock/Unlock
static enum status_code	i2c_master_lock (struct i2c_master_module *const module)
	Attempt to get lock on driver instance. More...
static void	i2c_master_unlock (struct i2c_master_module *const module)
	Unlock driver instance. More...
Configuration and Initialization
static bool	i2c_master_is_syncing (const struct i2c_master_module *const module)
	Returns the synchronization status of the module. More...
static void	i2c_master_get_config_defaults (struct i2c_master_config *const config)
	Gets the I2C master default configurations. More...
enum status_code	i2c_master_init (struct i2c_master_module *const module, Sercom *const hw, const struct i2c_master_config *const config)
	Initializes the requested I2C hardware module. More...
static void	i2c_master_enable (const struct i2c_master_module *const module)
	Enables the I2C module. More...
static void	i2c_master_disable (const struct i2c_master_module *const module)
	Disable the I2C module. More...
void	i2c_master_reset (struct i2c_master_module *const module)
	Resets the hardware module. More...
Read and Write
enum status_code	i2c_master_read_packet_wait (struct i2c_master_module *const module, struct i2c_master_packet *const packet)
	Reads data packet from slave. More...
enum status_code	i2c_master_read_packet_wait_no_stop (struct i2c_master_module *const module, struct i2c_master_packet *const packet)
	Reads data packet from slave without sending a stop condition when done. More...
enum status_code	i2c_master_write_packet_wait (struct i2c_master_module *const module, struct i2c_master_packet *const packet)
	Writes data packet to slave. More...
enum status_code	i2c_master_write_packet_wait_no_stop (struct i2c_master_module *const module, struct i2c_master_packet *const packet)
	Writes data packet to slave without sending a stop condition when done. More...
void	i2c_master_send_stop (struct i2c_master_module *const module)
	Sends stop condition on bus. More...
void	i2c_master_send_nack (struct i2c_master_module *const module)
	Sends nack signal on bus. More...
enum status_code	i2c_master_read_byte (struct i2c_master_module *const module, uint8_t *byte)
	Reads one byte data from slave. More...
enum status_code	i2c_master_write_byte (struct i2c_master_module *const module, uint8_t byte)
	Write one byte data to slave. More...
enum status_code	i2c_master_read_packet_wait_no_nack (struct i2c_master_module *const module, struct i2c_master_packet *const packet)
	Reads data packet from slave without sending a nack signal and a stop condition when done. More...

#define PINMUX_DEFAULT   0

Referenced by i2c_master_get_config_defaults(), and usart_init().