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INA219 是一款具備 I 2C 或 SMBUS 兼容接口的分流器 和功率監(jiān)測計。該器件監(jiān)測分流器電壓降和總線電源電 壓，轉(zhuǎn)換次數(shù)和濾波選項可通過編程設定。可編程校準 值與內(nèi)部乘法器相結(jié)合，支持直接讀取電流值（單位： 安培）。通過附加乘法寄存器可計算功率（單位： 瓦）。I 2C 或 SMBUS 兼容接口 具有 16 個可編程地 址。

c文件

#include "ina219.h"

void INA_REG_Write(unsigned char reg,unsigned int data);

#ifdef INA_INSIDE_IIC
void INA_IIC_Delay()
{unsigned char x;
	for(x=1;x>0;x--)
	{
		__NOP();__NOP();__NOP();__NOP();__NOP();
	}
}

void INA_IIC_INIT(void)		//IIC初始化
{
	GPIO_InitTypeDef GPIO_INIT;
	RCC_APB2PeriphClockCmd(IIC_RCC,ENABLE);
	
	GPIO_INIT.GPIO_Mode=GPIO_Mode_Out_PP;
	GPIO_INIT.GPIO_Pin=IIC_SDA | IIC_SCL;
	GPIO_INIT.GPIO_Speed=GPIO_Speed_50MHz;
	GPIO_Init(IIC_PORT,&GPIO_INIT);
	
	IIC_SDA_H;
	IIC_SCL_H;
}

void INA_IIC_SDA_OUT(void)	//SDA配置為輸出
{
	GPIO_InitTypeDef GPIO_INIT;
	GPIO_INIT.GPIO_Mode=GPIO_Mode_Out_PP;
	GPIO_INIT.GPIO_Pin=IIC_SDA ;
	GPIO_INIT.GPIO_Speed=GPIO_Speed_50MHz;
	GPIO_Init(IIC_PORT,&GPIO_INIT);
}
void INA_IIC_SDA_IN(void)	//SDA配置為輸入
{
	GPIO_InitTypeDef GPIO_INIT;
	GPIO_INIT.GPIO_Mode=GPIO_Mode_IPU;
	GPIO_INIT.GPIO_Pin=IIC_SDA ;
	GPIO_INIT.GPIO_Speed=GPIO_Speed_50MHz;
	GPIO_Init(IIC_PORT,&GPIO_INIT);
}

void INA_IIC_Start(void)	//開始信號
{
	IIC_SDA_H;
	IIC_SCL_H;
	INA_IIC_Delay();
	IIC_SDA_L;
	INA_IIC_Delay();
	IIC_SDA_L;
}
void INA_IIC_Stop(void )	//結(jié)束信號
{
	IIC_SDA_L;
	IIC_SCL_H;
	INA_IIC_Delay();
	IIC_SDA_H;
	INA_IIC_Delay();
	IIC_SCL_L;
	
	IIC_SCL_H;
	IIC_SDA_H;
}
bool INA_IIC_ACK_Read(void)	//讀取應答信號
{
	bool ack;
	IIC_SDA_H;
	INA_IIC_SDA_IN();

	IIC_SCL_H;
	INA_IIC_Delay();
	if(IIC_SDA_READ() == SET) ack=false;
	else ack=true;
	IIC_SCL_L;
	INA_IIC_SDA_OUT();
	return ack;
}
void INA_IIC_ACK_Send(bool ack)	//發(fā)送應答信號
{
	IIC_SCL_L;
	if(ack == true) 
		IIC_SDA_L;
	else IIC_SDA_H;
	IIC_SCL_H;
	INA_IIC_Delay();
	IIC_SCL_L;
}
void INA_IIC_Send_Byte(unsigned char byte)	//IIC發(fā)送一位數(shù)據(jù)
{
	unsigned char i;
	IIC_SCL_L;
	for(i=0;i>8);
	data_temp[1]=(unsigned char )(data & 0xFF);
	INA_IIC_Start();
	INA_IIC_Send_Byte(INA219_ADDRESS);	//發(fā)送INA219地址
	INA_IIC_Send_Byte(reg);							//發(fā)送寄存器地址
	INA_IIC_Send_Byte(data_temp[0]);						//發(fā)送高8位數(shù)據(jù)
	data++;
	INA_IIC_Send_Byte(data_temp[1])	;					//發(fā)送低8位數(shù)據(jù)
	INA_IIC_Stop();
}

void INA_Init(void )	
{
	INA_IIC_INIT();
	INA_REG_Write(INA219_REG_CONFIG,INA219_CONFIG_value);
	INA_REG_Write(INA219_REG_CALIBRATION,INA_CAL);
}
unsigned int INA_GET_Voltage_MV(void)	//獲取電壓（單位：mv）
{
	unsigned char data_temp[2];
	INA_Read_Byte_s(0x02,data_temp);
	return (int)((((data_temp[0]> 3)*4);	//右移3為去掉：bit2，CNVR，OVF三位，再乘以 4MV (官方文檔規(guī)定)，得到當前總線的電壓值
}
unsigned int INA_GET_Current_MA(void)		//獲取電流（單位：mA）
{
	unsigned char data_temp[2];
	INA_REG_Write(INA219_REG_CONFIG,INA219_CONFIG_value);
	INA_Read_Byte_s(INA219_REG_CURRENT,data_temp);
	return (int)((((data_temp[0]

#ifndef _INA219_H_
#define _INA219_H_
#include "stm32f10x.h"
#include "stdbool.h"
// I2C Address Options
/*
#define INA219_I2C_ADDRESS_CONF_0               (u8)(0x40