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318

Code Example

SW_I2C.h

#include <msp430.h>

#include "delay.h"

#define SW_I2C_DIR P1DIR

#define SW_I2C_OUT P1OUT

#define SW_I2C_IN P1IN

#define SDA_pin BIT7

#define SCL_pin BIT6

#define SDA_DIR_OUT() do{SW_I2C_DIR |= SDA_pin;}while(0)

#define SDA_DIR_IN() do{SW_I2C_DIR &= ~SDA_pin;}while(0)

#define SCL_DIR_OUT() do{SW_I2C_DIR |= SCL_pin;}while(0)

#define SCL_DIR_IN() do{SW_I2C_DIR &= ~SCL_pin;}while(0)

#define SDA_HIGH() do{SW_I2C_OUT |= SDA_pin;}while(0)

#define SDA_LOW() do{SW_I2C_OUT &= ~SDA_pin;}while(0)

#define SCL_HIGH() do{SW_I2C_OUT |= SCL_pin;}while(0)

#define SCL_LOW() do{SW_I2C_OUT &= ~SCL_pin;}while(0)

#define SDA_IN() (SW_I2C_IN & SDA_pin)

#define I2C_ACK 0xFF

#define I2C_NACK 0x00

#define I2C_timeout 1000

void SW_I2C_init(void);

void SW_I2C_start(void);

void SW_I2C_stop(void);

unsigned char SW_I2C_read(unsigned char ack);

void SW_I2C_write(unsigned char value);

void SW_I2C_ACK_NACK(unsigned char mode);

unsigned char SW_I2C_wait_ACK(void);

SW_I2C.c

#include "SW_I2C.h"

void SW_I2C_init(void)

{

SDA_DIR_OUT();

SCL_DIR_OUT();

delay_ms(1);

SDA_HIGH();

SCL_HIGH();

}

void SW_I2C_start(void)

{

SDA_DIR_OUT();

Brand	Texas Instruments
Model	MSP430
Category	Microcontrollers
Language	English

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