bq_smbus.c

用PIC16F73编写的SMBUS通信测试程序

/* I2C test program that writes & reads data to an I2C EEPROM device. */
/*
此程序用于SMBUS通讯测试，配置可参考I2C.H
软件I2C通讯，使用RA1==>SDA,RA0==>SCL
单片机使用PIC16F716
晶振4M

*/

#include <pic.h>
#include "delay.h"
#include "i2c.h"
#include "delay.c"
#include "i2c.c"
#include "i2c_2.c"

#define ROM1 0x16        /* smbus */
#define ROM 0xA0        /* I2C EEPROM */
#define	XTAL_FREQ	4MHZ
#define I2C_MODULE 0




uchar code1[]={0x06,0x06,0x5a,0xff,0x80,0x00,0x00,0x00,0xff};
uchar code2[]={0x5a,0xff,0x5a,0xff};
uchar code3[]={0x80,0x00,0x5a,0xff};
uchar code4[]={0x00,0x00,0x5a,0xff};

void flashled(void) {           /* flash a led on RB0 */
	while(1) {
            RB0 = 1;
            DelayMs(200);
            RB0 = 0;
            DelayMs(200);
	}
}


void WriteByte(unsigned char addr, unsigned char byte) {
	i2c_WriteTo(ROM);
	if (i2c_PutByte(addr)==I2C_ERROR)
            flashled();
	if (i2c_PutByte(byte)==I2C_ERROR)
            flashled();
}


/*================================================================ 
读取BQ寄存器里面数据函数-word 
函数原型： unsigned int ReadByte_smbus(unsigned char addr)，读取指定地址BQ
器件里数据。器件的ROM1码已经设定 
返回读取的数据表示操作成功，否则操作有误。 
=================================================================*/ 
unsigned int ReadByte_smbus(unsigned char addr) {
	unsigned int data=0;
	unsigned char data1,data2;
	i2c_WriteTo(ROM1);		//i2c_Open((address), I2C_read); i2c_read=0;
	if (i2c_PutByte(addr)==I2C_ERROR)	//send adress and sendack
            flashled();
        i2c_ReadFrom(ROM1);		//i2c_Open((address), I2C_WRITE) i2c_write=1;
	data1=i2c_GetByte(I2C_MORE);  	//i2c_more==>true sendack: more byte to send
	data2=i2c_GetByte(I2C_LAST);	//i2c_last==>false  nosendack:no more byte to send
	data|=data1;
	data<<=8;
	data|=data2;
	return(data);
}

/*================================================================ 
写BQ寄存器里面数据函数-
函数原型
=================================================================*/ 
void write_word_smbus(unsigned char addr,unsigned char datal,unsigned char datah) {
	unsigned int data=0;
	unsigned char data1,data2;
	i2c_WriteTo(ROM1);		//i2c_Open((address), I2C_WRITE) i2c_write=1;
	if (i2c_PutByte(addr)==I2C_ERROR)	//send adress and sendack
            flashled();
	if (i2c_PutByte(datal)==I2C_ERROR)	//send adress and sendack
            flashled();
 	if (i2c_PutByte(datah)==I2C_ERROR)	//send adress and sendack
            flashled();
        i2c_Stop();        

}
/*================================================================ 
写i2c寄存器里面数据函数-
函数原型
=================================================================*/ 
void write_word_i2c(unsigned char addr,unsigned char datal,unsigned char datah) {
	unsigned int data=0;
	unsigned char data1,data2;
	i2c_WriteTo(ROM);		//i2c_Open((address), I2C_WRITE) i2c_write=1;
	if (i2c_PutByte(addr)==I2C_ERROR)	//send adress and sendack
            flashled();
	if (i2c_PutByte(datal)==I2C_ERROR)	//send adress and sendack
            flashled();
 	if (i2c_PutByte(datah)==I2C_ERROR)	//send adress and sendack
            flashled();
        i2c_Stop();        

}
////////********************************//////////////
int ReadWord(uchar addr){
uchar data1,data2;
int data;

 start_i2c(); 
      send_byte(0x16);      //发送器件地址，即DEVICE ADDRESS。 
        if (ack==0) i2c_error(); //如果24LC02无应答。则进入I2C ERROR错误指示。 
      send_byte(addr);         //发送字地址，即WORD ADDRESS。D口显示数组。 
        if (ack==0) i2c_error(); 
      start_i2c();          //重新启动总线。 
      send_byte(0x17);      //发送读命令和器件地址DEVICE ADDRESS。 
        if (ack==0) i2c_error(); 
      data2=receive_byte();
      i2c_SendAcknowledge(1);
      data1=receive_byte();
      stop_i2c(); 
      //data<<=8;
      //data|=data1;
      return(data1);
      }

//////////////////////////////////////////////
static  int  remain,remain1;

void main(void) {
unsigned char count,val;
//const unsigned char *add;
//add=0x20;
//TRISB=0;        /* use a led on RB0 - set as output */
//PORTB=0;
//RB0=0;
PORTA=0;
ADCON1=0X06;
TRISA=0x0;        /* use a led on RB0 - set as output */
RA2=0;
remain=0x0;

/* initialize i2c */
/*
#ifdef I2C_MODULE
    //SSPMode(MASTER_MODE);
    //SSPEN = 1;
    CKP = 1;
#else
    SCL_DIR = I2C_OUTPUT;
    SDA_DIR = I2C_OUTPUT;
    SDA = 0;
    SCL = 0;
#endif
*/
    SCL_DIR = I2C_OUTPUT;
    SDA_DIR = I2C_OUTPUT;
    SDA = 0;
    SCL = 0;

while(1) {

    RA2=0; 
    remain=0;
    remain1=0;
    count=0x1;

    DelayMs(200);	

    remain1=ReadByte_smbus(0x02);    //测试OK，能正确读取BQ器件的数据

      DelayMs(20);

//     I_send_word(0x16,0x4f,0x5a,0xff);
//     I_send_word(0x16,0x4f,0x80,0x00);
//     I_send_word(0x16,0x4f,0x00,0x00);
//  I_send_word(0x16,0x00,0x06,0x06);
//  I_send_str(0x16,0x0,code1,2); 

	write_word_smbus(0x0,0x06,0x06);
	DelayMs(10);
    	DelayMs(200);
    	DelayMs(200);   
    	DelayMs(200);
    	DelayMs(200); 
    	DelayMs(200);
    	DelayMs(200);   	
	write_word_i2c(0x02,0x6d,0x29);	
	write_word_i2c(0x03,0x75,0xaf);	
	DelayMs(200);
    	DelayMs(200);   
    	DelayMs(200);
    	DelayMs(200); 
    	DelayMs(200);
    	DelayMs(200);  
        DelayMs(20);	
	remain1=ReadByte_smbus(0x02);    //测试OK，能正确读取BQ器件的数据
	
      remain1=ReadByte_EE(0x4);    //测试OK，能正确读取BQ器件的数据
      remain1=ReadByte_EE(0x5);
      remain1=ReadByte_EE(0x6);
      remain1=ReadByte_EE(0x7);
      remain1=ReadByte_EE(0x8);

      I_send_str(0xa0,0x0,code,5);    //测试OK，能正确发送数据给BQ器件
      DelayMs(20);
      I_send_word(0x16,0x4f,0x5a,0xff);
      I_send_word(0x16,0x4f,0x80,0x00);
      I_send_word(0x16,0x4f,0x00,0x00);
      DelayMs(20);
    remain1=ReadByte_smbus(0x15);    //OK
    remain1=ReadByte_smbus(0x15);    //OK
    DelayMs(200);
/*===================以下直接写EEPROM
    RA2=1;	
    I_send_str(0xa0,0x00,code,5);    //OK
    remain=0;
    remain1=0;
    count=0x1;
    DelayMs(200);
    remain1=ReadByte_EE(0x4);    //OK
    DelayMs(200);
==================================*/   
    
    
}
}