i2c_sim.c File Reference

#include "fsl_gpio_hal.h"
#include "i2c_sim.h"
#include "fsl_os_abstraction.h"
#include "fsl_clock_manager.h"

Macros
#define	I2C_INIT
#define	I2C_ACTIVE
#define	I2C_TRISTATE
#define	I2C_READ
#define	I2C_SDA_DIR(dir)
#define	I2C_SDA(bit)
#define	I2C_SCL(bit)
#define	I2C_DELAY
#define	RETRIES
#define	I2C_ACK
#define	I2C_NOACK
#define	PRINTD(fmt, args...)

Functions
static void	send_start (void)
	Send START. More...
static void	send_stop (void)
	Send STOP. More...
static void	send_ack (int32_t ack)
	Send ACK. More...
static int32_t	write_byte (uint8_t data)
	Send 8 bits and look for an acknowledgement. More...
static uint8_t	read_byte (int32_t ack)
	Read one byte. More...
void	i2c_gpio_init (int32_t speed, int32_t slaveaddr)
	Initialization. More...
uint8_t	i2c_gpio_probe (uint8_t addr)
	Probe to see if a chip is present. Probe to see if a chip is present. Also good for checking for the completion of EEPROM writes since the chip stops responding until the write completes (typically 10mSec). More...
uint8_t	i2c_gpio_read (uint8_t chip, uint32_t addr, int32_t alen, uint8_t *buffer, int32_t len)
	Read bytes. More...
uint8_t	i2c_gpio_write (uint8_t chip, uint32_t addr, int32_t alen, uint8_t *buffer, int32_t len)
	Write bytes. More...

Macro Definition Documentation

#define I2C_ACK

#define I2C_ACTIVE

#define I2C_DELAY

#define I2C_INIT

#define I2C_NOACK

#define I2C_READ

#define I2C_SCL

(

bit

)

#define I2C_SDA

(

bit

)

#define I2C_SDA_DIR

(

dir

)

#define I2C_TRISTATE

#define PRINTD	(		fmt,
			args...
	)

#define RETRIES

Function Documentation

void i2c_gpio_init	(	int32_t	speed,
		int32_t	slaveaddr
	)

Parameters

[in]	speed	I2C speed.
[in]	slaveaddr	Slave device address.

uint8_t i2c_gpio_probe

(

uint8_t

addr

)

Parameters

[in]

addr

I2C slave device address.

Returns

Probe successful or failed.

uint8_t i2c_gpio_read	(	uint8_t	chip,
		uint32_t	addr,
		int32_t	alen,
		uint8_t *	buffer,
		int32_t	len
	)

This function will read data from i2c slave device.

Parameters

[in]	chip	Chip number.
[in]	addr	Address in I2C slave device.
[in]	alen	Address len.
[in]	buffer	Buffer address that will be read to.
[in]	len	Len of data that will be read.

Returns

Read successful or not.

uint8_t i2c_gpio_write	(	uint8_t	chip,
		uint32_t	addr,
		int32_t	alen,
		uint8_t *	buffer,
		int32_t	len
	)

This function will write data to i2c slave device.

Parameters

[in]	chip	Chip address.
[in]	addr	Address in I2C slave device.
[in]	alen	Address len.
[in]	buffer	Buffer address that will be write.
[in]	len	Len of data that will be write.

Returns

Write failed times.

static uint8_t read_byte ( int32_t  ack )

static

if ack == I2C_ACK, ACK the byte so can continue reading, else send I2C_NOACK to end the read.

Parameters

[in]

ack

Ack data that to be sent.

Returns

Read data byte.

static void send_ack ( int32_t  ack )

static

Send ACK. Ack should be I2C_ACK or I2C_NOACK.

static void send_start ( void  )

static

Send START. High -> Low on SDA while SCL is High.

static void send_stop ( void  )

static

Send STOP. STOP: Low -> High on SDA while SCL is High.

static int32_t write_byte ( uint8_t  data )

static

Parameters

[in]

data

Data that will be write.

Returns

Ackledge value. Not a nack is an ack.