PIC18F458单片机，IIC操作流程代码

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木木guainv|

楼主 | 2025-1-17 04:15 | 只看该作者回帖奖励

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PIC18, PIC18F, PIC18F458, ic, iic

以下包含了PIC18单片机驱动代码部分，供大家使用

#ifndef __I2C_H__
#define __I2C_H__

/* link the I/O library */
#pragma library io

#include <pic18fregs.h>

#define _I2CPARAM_SPEC __data

/* I2C modes of operation */
#define I2C_SLAVE10B_INT 0x0f
#define I2C_SLAVE7B_INT 0x0e
#define I2C_SLAVE_IDLE 0x0b
#define I2C_MASTER 0x08
#define I2C_SLAVE10B 0x07
#define I2C_SLAVE7B 0x06

/* slew rate control */
#define I2C_SLEW_OFF 0xc0
#define I2C_SLEW_ON 0x00

/* macros to generate hardware conditions on I2C module */

/* generate stop condition */
#define I2C_STOP() SSPCON2bits.PEN=1

/* generate start condition */
#define I2C_START() SSPCON2bits.SEN=1

/* generate restart condition */
#define I2C_RESTART() SSPCON2bits.RSEN=1

/* generate not acknoledge condition */
#define I2C_NACK() SSPCON2bits.ACKDT=1; SSPCON2bits.ACKEN=1

/* generate acknoledge condition */
#define I2C_ACK() SSPCON2bits.ACKDT=0; SSPCON2bits.ACKEN=1

/* wait until I2C is idle */
#define I2C_IDLE() while((SSPCON2 & 0x1f) | (SSPSTATbits.R_W));

/* is data ready from I2C module ?? */
#define I2C_DRDY() (SSPSTATbits.BF)

/* function equivalent to macros for generating hardware conditions */

/* stop */
void i2c_stop(void);

/* start */
void i2c_start(void);

/* restart */
void i2c_restart(void);

/* not acknoledge */
void i2c_nack(void);

/* acknoledge */
void i2c_ack(void);

/* wait until I2C goes idle */
void i2c_idle(void);

/* is character ready in I2C buffer ?? */
unsigned char i2c_drdy(void);

/* read a character from I2C module */
unsigned char i2c_readchar(void);

/* read a string from I2C module */
char i2c_readstr(_I2CPARAM_SPEC unsigned char *ptr, unsigned char len);

/* write a character to I2C module */
char i2c_writechar(unsigned char dat);

/* write a string to I2C module */
char i2c_writestr(unsigned char *ptr);

/* configure I2C port for operation */
void i2c_open(unsigned char mode, unsigned char slew, unsigned char addr_brd);

void i2c_close(void);

#endif /* __I2C_H__ */

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版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。

原文链接：https://blog.csdn.net/weixin_43855490/article/details/144025953

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