BQ4050 + STM32 MCU 虛擬IIC讀取SMBUS數據

1、時鐘速度

2、佔空比

3、數據格式

 

#include "stm32f4xx.h"
#include "smbus.h"
#include "stdint.h"
#include "bq4050.h"
#include "usart.h"
#include "delay.h"
#include "myiic.h"


#define BQ4050_ADDRRESS 	0x16

#define	INVALID_REG_ADDR	0xFF


#define BQ4050_REG_TEMP		  	0x08		//Temperature   U2
#define BQ4050_REG_VOLT		   	0x09		//Voltage   U2
#define BQ4050_REG_CURRENT		0x0A		//CURRENT   I2
#define BQ4050_REG_RSOC			  0x0D		//RelativeStateOfCharge U1
#define BQ4050_REG_FCC		  	0x10		//FullChargeCapacity    U2
#define BQ4050_REG_TTE		  	0x12		//TimeToEmpty   U2
#define BQ4050_REG_TTF		  	0x13		//TimeToFull    U2
#define BQ4050_REG_RMC		  	0x0F		///* Remaining Capacity */


uint16_t TEMP_para = 0x0103;
uint32_t VOLE_para = 1;
uint32_t CURR_para = 1;
uint32_t RSOC_para = 1;
uint32_t FCC_para  = 1;
uint32_t TTE_para  = 1;
uint32_t TTF_para  = 1;
uint32_t RMC_para  = 1;

uint16_t bq4050Para[8];
u8 _ChargeProcess;

enum bq_fg_reg_idx {
			BQ_FG_REG_MAC = 0,
			BQ_FG_REG_TEMP,					 /* Battery Temperature */
			BQ_FG_REG_VOLT,		  		 /* Battery Voltage */
			BQ_FG_REG_AI,		   	     /* Average Current */
			BQ_FG_REG_BATT_STATUS,	 /* BatteryStatus */
			BQ_FG_REG_TTE,			     /* Time to Empty */
			BQ_FG_REG_TTF,			     /* Time to Full */
			BQ_FG_REG_FCC,			     /* Full Charge Capacity */
			BQ_FG_REG_RM,			       /* Remaining Capacity */
			BQ_FG_REG_CC,			       /* Cycle Count */
			BQ_FG_REG_SOC,			     /* Relative State of Charge */
			BQ_FG_REG_SOH,			     /* State of Health */
			BQ_FG_REG_DC,			/* Design Capacity */
			BQ_FG_REG_MBA,			/* ManufacturerBlockAccess*/
			NUM_REGS,
};

static u8 bq4050_regs[NUM_REGS] = {
	0x00,	/* CONTROL */
	0x08,	/* TEMP */
	0x09,	/* VOLT */
	0x0B,	/* AVG CURRENT */
	0x16,	/* FLAGS */
	0x12,	/* Time to empty */
	0x13,	/* Time to full */
	0x10,	/* Full charge capacity */
	0x0F,	/* Remaining Capacity */
	0x17,	/* CycleCount */
	0x0D,	/* State of Charge */
	0x4F,	/* State of Health */
	0x18,	/* Design Capacity */
	0x44,	/* ManufacturerBlockAccess*/
};


enum {
	SEAL_STATE_RSVED,
	SEAL_STATE_UNSEALED,
	SEAL_STATE_SEALED,
	SEAL_STATE_FA,
};




/*

*/
u8  getBatteryInfo(u8 slaveAddr, u8 Comcode,u8 *data, u8 size)
{  
	 u8 ackFlag;
	 uint8_t buff[2];
	
	
	
	 IIC_Start();  
	
	
	 IIC_Send_Byte(slaveAddr);//發送地址
     IIC_Wait_Ack();
	 IIC_Send_Byte(Comcode);


	 IIC_Wait_Ack();
	
	
	
	 delay_us(750);
	
   IIC_Start(); 
	 IIC_Send_Byte(slaveAddr+1);//發送地址
	 IIC_Wait_Ack();
	 delay_us(50);


   while(size-1){
	 *data =   IIC_Read_Byte(1);
	 IIC_Ack(); 

	  delay_us(10);
      data++;
	  size--;
	 }
	 delay_us(60);
	 *data++ = IIC_Read_Byte(0);
	
	 IIC_Stop();
	 delay_ms(5);
	
}




u8  getFW(u8 slaveAddr, u8 *data, u8 ReadAddr)
{  
	 u8 ackFlag;
	 uint8_t buff[2];
	
	
	
	 IIC_Start();  
	
	
	 IIC_Send_Byte(slaveAddr);//發送地址

	 IIC_Send_Byte(0x03);
	 IIC_Send_Byte(0x00);

	 delay_us(20);
     IIC_Start(); 
	
	 
	 IIC_Send_Byte(ReadAddr);//發送地址

	  
	
	 *data =   IIC_Read_Byte(1);
    delay_us(10);
	
	 *data++ = IIC_Read_Byte(0);
	
	 IIC_Stop();
	 
	
	delay_ms(100);
}




//模擬IIC初始化
void SMBusEmulationInit()
{
	 IIC_Init();

}

#include "myiic.h"
#include "delay.h"
//////////////////////////////////////////////////////////////////////////////////	 

								  
////////////////////////////////////////////////////////////////////////////////// 	

//初始化IIC
void IIC_Init(void)
{			
  GPIO_InitTypeDef  GPIO_InitStructure;
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);//使能GPIOB時鐘
  //GPIOB6,B7初始化設置
  GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_6 | GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_OUT;//普通輸出模式
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推輓輸出
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;//上拉
  GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化
	IIC_SCL=1;
	IIC_SDA=1;
	
	
}

//產生IIC起始信號
void IIC_Start(void)
{
	
	SDA_OUT();     //sda線輸出
	IIC_SCL=0;
	delay_us(2);
	IIC_SDA=1;
	delay_us(1);	  	  
	IIC_SCL=1;
	delay_us(9);
 	IIC_SDA=0;//START:when CLK is high,DATA change form high to low 
	delay_us(9);
	IIC_SCL=0;//鉗住I2C總線，準備發送或接收數據 

}	


//產生IIC停止信號
void IIC_Stop(void)
{
	SDA_OUT();//sda線輸出
	IIC_SCL=0;
	delay_us(1);
	IIC_SDA=0;//STOP:when CLK is high DATA change form low to high
 	delay_us(9);
	IIC_SCL=1;
    delay_us(9);	
	IIC_SDA=1;//發送I2C總線結束信號
	delay_us(9);		
							   	
}
//等待應答信號到來
//返回值：1，接收應答失敗
//        0，接收應答成功
u8 IIC_Wait_Ack(void)
{
	u8 ucErrTime=0;
	SDA_IN();      //SDA設置爲輸入  
	IIC_SDA=1;delay_us(9);	   
	IIC_SCL=1;delay_us(9);	 
	while(READ_SDA)
	{
		ucErrTime++;
		if(ucErrTime>250)
		{
			IIC_Stop();
			return 1;
		}
	}
	IIC_SCL=0;//時鐘輸出0 	   
	return 0;  
} 



//產生ACK應答
void IIC_Ack(void)
{
	IIC_SCL=0;
	SDA_OUT();
	IIC_SDA=0;
	delay_us(9);
	IIC_SCL=1;
	delay_us(9);
	IIC_SCL=0;
}
//不產生ACK應答		    
void IIC_NAck(void)
{
	IIC_SCL=0;
	SDA_OUT();
	IIC_SDA=1;
	delay_us(9);
	IIC_SCL=1;
	delay_us(9);
	IIC_SCL=0;
}					 				     


 
//IIC發送一個字節
//返回從機有無應答
//1，有應答
//0，無應答			  
void IIC_Send_Byte(u8 txd)
{                        
    u8 t;   
	  SDA_OUT(); 	    
    IIC_SCL=0;//拉低時鐘開始數據傳輸
    for(t=0;t<8;t++){ 
		IIC_SDA=(txd&0x80)>>7;
    txd<<=1; 	  
		delay_us(8);   
		IIC_SCL=1;
		delay_us(8); 
		IIC_SCL=0;	
		delay_us(8);
    }	
   
} 



//讀1個字節，ack=1時，發送ACK，ack=0，發送nACK   
u8 IIC_Read_Byte(unsigned char ack)
{
	unsigned char i,receive=0;
	SDA_IN();//SDA設置爲輸入
  for(i=0;i<8;i++ )
	{
    IIC_SCL=0; 
    delay_us(12);
		IIC_SCL=1;
    receive<<=1;
    if(READ_SDA)receive++;   
		delay_us(9); 
    }					 

	
    return receive;
}





/*
函數：I2C_Write()
功能：向I2C總線寫1個字節的數據
參數：
 dat：要寫到總線上的數據
*/
void I2C_Write(unsigned char dat)
{
  /*發送1，在SCL爲高電平時使SDA信號爲高*/
  /*發送0，在SCL爲高電平時使SDA信號爲低*/
 unsigned char t ;
 for(t=0;t<8;t++)
 {

  IIC_SDA = (dat & 0x80);
  delay_us(10);
  IIC_SCL = 1;  //置時鐘線爲高，通知被控器開始接收數據位
  delay_us(10);
  IIC_SCL = 0;   
  delay_us(10);
  dat <<= 1;
 }


}