INA219电流采集驱动

针对cortexm系列

INA219 是一款具备 I 2C 或 SMBUS 兼容接口的分流器 和功率监测计。该器件监测分流器电压降和总线电源电 压，转换次数和滤波选项可通过编程设定。可编程校准 值与内部乘法器相结合，支持直接读取电流值（单位： 安培）。通过附加乘法寄存器可计算功率（单位： 瓦）。I 2C 或 SMBUS 兼容接口 具有 16 个可编程地 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配置为输出
{
	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配置为输入
{
	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)	//开始信号
{
	IIC_SDA_H;
	IIC_SCL_H;
	INA_IIC_Delay();
	IIC_SDA_L;
	INA_IIC_Delay();
	IIC_SDA_L;
}
void INA_IIC_Stop(void )	//结束信号
{
	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)	//读取应答信号
{
	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)	//发送应答信号
{
	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发送一位数据
{
	unsigned char i;
	IIC_SCL_L;
	for(i=0;i< 8;i++)
	{
		if(byte & 0x80 )	IIC_SDA_H;
		else IIC_SDA_L;
		IIC_SCL_H;
		INA_IIC_Delay();
		IIC_SCL_L;
		INA_IIC_Delay();
		byte< <=1;
	}
	INA_IIC_ACK_Read();
}
unsigned char  INA_IIC_Read_Byte(void)	//IIC读取一位数据
{
	unsigned char i,byte=0;
	INA_IIC_SDA_IN();
	for(i=0;i< 8;i++)
	{
		IIC_SCL_H;
		byte< <=1;
		if(IIC_SDA_READ() == SET) byte |= 0x01;
		else byte &= 0xFE;
		IIC_SCL_L;
		INA_IIC_Delay();
	}
	INA_IIC_SDA_OUT();
	return byte;
}
#endif
void INA_Read_Byte_s(unsigned char reg,unsigned char *data)	//读两位数据
{
	INA_IIC_Start();
	INA_IIC_Send_Byte(INA219_ADDRESS);	//发送INA219地址s
	INA_IIC_Send_Byte(reg);
	
	INA_IIC_Start();
	INA_IIC_Send_Byte(INA219_ADDRESS+0x01);	//设置iic为读模式
	*data=INA_IIC_Read_Byte();
	data++;
	INA_IIC_ACK_Send(1);
	*data=INA_IIC_Read_Byte();
	INA_IIC_ACK_Send(0);
	INA_IIC_Stop();
}
void INA_REG_Write(unsigned char reg,unsigned int data)	//写寄存器		测试成功
{
	unsigned char data_temp[2];
	data_temp[0]=(unsigned char )(data >>8);
	data_temp[1]=(unsigned char )(data & 0xFF);
	INA_IIC_Start();
	INA_IIC_Send_Byte(INA219_ADDRESS);	//发送INA219地址
	INA_IIC_Send_Byte(reg);							//发送寄存器地址
	INA_IIC_Send_Byte(data_temp[0]);						//发送高8位数据
	data++;
	INA_IIC_Send_Byte(data_temp[1])	;					//发送低8位数据
	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)	//获取电压（单位：mv）
{
	unsigned char data_temp[2];
	INA_Read_Byte_s(0x02,data_temp);
	return (int)((((data_temp[0]< <8)+data_temp[1]) >> 3)*4);	//右移3为去掉：bit2，CNVR，OVF三位，再乘以 4MV (官方文档规定)，得到当前总线的电压值
}
unsigned int INA_GET_Current_MA(void)		//获取电流（单位：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]< <8)+data_temp[1]))*IAN_I_LSB);		//得到寄存器的值在乘以每位对应的值（IAN_I_LSB）得到实际的电流
}
unsigned int INA_GET_Power_MW(void)		//获取当前功率（单位：mw）
{
	unsigned char data_temp[2];
	INA_Read_Byte_s(INA219_REG_POWER,data_temp);
	return (int)(((data_temp[0]< <8)+data_temp[1])*INA_Power_LSB);	//得到寄存器的值在乘以每位对应的值（INA_Power_LSB）得到实际的功率
}

H文件

---

#ifndef _INA219_H_
#define _INA219_H_
#include "stm32f10x.h"
#include "stdbool.h"
// I2C Address Options
/*
#define INA219_I2C_ADDRESS_CONF_0               (u8)(0x40 < < 1)     // A0 = GND, A1 = GND
#define INA219_I2C_ADDRESS_CONF_1               (u8)(0x41 < < 1)     // A0 = VS+, A1 = GND
#define INA219_I2C_ADDRESS_CONF_2               (u8)(0x42 < < 1)     // A0 = SDA, A1 = GND
#define INA219_I2C_ADDRESS_CONF_3               (u8)(0x43 < < 1)     // A0 = SCL, A1 = GND
#define INA219_I2C_ADDRESS_CONF_4               (u8)(0x44 < < 1)     // A0 = GND, A1 = VS+
#define INA219_I2C_ADDRESS_CONF_5               (u8)(0x45 < < 1)     // A0 = VS+, A1 = VS+
#define INA219_I2C_ADDRESS_CONF_6               (u8)(0x46 < < 1)     // A0 = SDA, A1 = VS+
#define INA219_I2C_ADDRESS_CONF_7               (u8)(0x47 < < 1)     // A0 = SCL, A1 = VS+
#define INA219_I2C_ADDRESS_CONF_8               (u8)(0x48 < < 1)     // A0 = GND, A1 = SDA
#define INA219_I2C_ADDRESS_CONF_9               (u8)(0x49 < < 1)     // A0 = VS+, A1 = SDA
#define INA219_I2C_ADDRESS_CONF_A               (u8)(0x4A < < 1)     // A0 = SDA, A1 = SDA
#define INA219_I2C_ADDRESS_CONF_B               (u8)(0x4B < < 1)     // A0 = SCL, A1 = SDA
#define INA219_I2C_ADDRESS_CONF_C               (u8)(0x4C < < 1)     // A0 = GND, A1 = SCL
#define INA219_I2C_ADDRESS_CONF_D               (u8)(0x4D < < 1)     // A0 = VS+, A1 = SCL
#define INA219_I2C_ADDRESS_CONF_E               (u8)(0x4E < < 1)     // A0 = SDA, A1 = SCL
#define INA219_I2C_ADDRESS_CONF_F               (u8)(0x4F < < 1)     // A0 = SCL, A1 = SCL
*/
#define INA219_ADDRESS  (0x40 < < 1)     // A0 = GND, A1 = GND

// 寄存器地址
#define INA219_REG_CONFIG                       (u8)(0x00)      // 模式配置寄存器 (R/W)
#define INA219_REG_SHUNTVOLTAGE                 (u8)(0x01)      // 分流电阻电压寄存器 (R)
#define INA219_REG_BUSVOLTAGE                   (u8)(0x02)      // 总线电压寄存器 (R)
#define INA219_REG_POWER                        (u8)(0x03)      // 功率寄存器 (R)
#define INA219_REG_CURRENT                      (u8)(0x04)      // 电流寄存器 (R)
#define INA219_REG_CALIBRATION                  (u8)(0x05)      // 基准值寄存器 (R/W)

//寄存器（0x01）参数定义
#define INA219_CONFIG_RESET                    (0x8000)  // Reset Bit

#define INA219_CONFIG_BVOLTAGERANGE_MASK       (0x2000)  // Bus Voltage Range Mask
#define INA219_CONFIG_BVOLTAGERANGE_16V        (0x0000)  // 0-16V Range
#define INA219_CONFIG_BVOLTAGERANGE_32V        (0x2000)  // 0-32V Range

#define INA219_CONFIG_GAIN_MASK                (0x1800)  // Gain Mask
#define INA219_CONFIG_GAIN_1_40MV              (0x0000)  // Gain 1, 40mV Range		//配置检测电阻上的最大检测电压
#define INA219_CONFIG_GAIN_2_80MV              (0x0800)  // Gain 2, 80mV Range
#define INA219_CONFIG_GAIN_4_160MV             (0x1000)  // Gain 4, 160mV Range
#define INA219_CONFIG_GAIN_8_320MV             (0x1800)  // Gain 8, 320mV Range

#define INA219_CONFIG_BADCRES_MASK             (0x0780)  // Bus ADC Resolution Mask
#define INA219_CONFIG_BADCRES_9BIT             (0x0080)  // 9-bit bus res = 0..511
#define INA219_CONFIG_BADCRES_10BIT            (0x0100)  // 10-bit bus res = 0..1023
#define INA219_CONFIG_BADCRES_11BIT            (0x0200)  // 11-bit bus res = 0..2047
#define INA219_CONFIG_BADCRES_12BIT            (0x0400)  // 12-bit bus res = 0..4097

#define INA219_CONFIG_SADCRES_MASK             (0x0078)  // Shunt ADC Resolution and Averaging Mask
#define INA219_CONFIG_SADCRES_9BIT_1S_84US     (0x0000)  // 1 x 9-bit shunt sample
#define INA219_CONFIG_SADCRES_10BIT_1S_148US   (0x0008)  // 1 x 10-bit shunt sample
#define INA219_CONFIG_SADCRES_11BIT_1S_276US   (0x0010)  // 1 x 11-bit shunt sample
#define INA219_CONFIG_SADCRES_12BIT_1S_532US   (0x0018)  // 1 x 12-bit shunt sample
#define INA219_CONFIG_SADCRES_12BIT_2S_1060US  (0x0048)	 // 2 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_4S_2130US  (0x0050)  // 4 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_8S_4260US  (0x0058)  // 8 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_16S_8510US (0x0060)  // 16 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_32S_17MS   (0x0068)  // 32 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_64S_34MS   (0x0070)  // 64 x 12-bit shunt samples averaged together
#define INA219_CONFIG_SADCRES_12BIT_128S_69MS  (0x0078)  // 128 x 12-bit shunt samples averaged together

#define INA219_CONFIG_MODE_MASK                (0x0007)  // Operating Mode Mask
#define INA219_CONFIG_MODE_POWERDOWN           (0x0000)
#define INA219_CONFIG_MODE_SVOLT_TRIGGERED     (0x0001)
#define INA219_CONFIG_MODE_BVOLT_TRIGGERED     (0x0002)
#define INA219_CONFIG_MODE_SANDBVOLT_TRIGGERED (0x0003)
#define INA219_CONFIG_MODE_ADCOFF              (0x0004)
#define INA219_CONFIG_MODE_SVOLT_CONTINUOUS    (0x0005)
#define INA219_CONFIG_MODE_BVOLT_CONTINUOUS    (0x0006)
#define INA219_CONFIG_MODE_SANDBVOLT_CONTINUOUS (0x0007)	
//INA配置的参数
#define INA_R 0.1									//阻值大小（单位ohm）
#define INA_I_MAX	3								//硬件最大检测电流（单位：A）	INA219_CONFIG_GAIN_电压/INA_R
#define IAN_I_LSB	0.1							//(0x04)检测出值对应每位电流值	选择接近 = (INA_I_MAX/32767(2^15))*1000(为了得到单位为A)		(A)
#define INA_Power_LSB 2						//(0x03)检测出值对应每位功率值	= 20 * IAN_I_LSB	(MW)
#define INA_CAL 4096							//(0x05)寄存器基准值
//根据上面定义设置 配置寄存器（0x00）的值：0x3C1F
#define INA219_CONFIG_value	INA219_CONFIG_BVOLTAGERANGE_32V|INA219_CONFIG_GAIN_8_320MV|INA219_CONFIG_BADCRES_12BIT|INA219_CONFIG_SADCRES_12BIT_1S_532US|INA219_CONFIG_MODE_SANDBVOLT_CONTINUOUS


#define INA_INSIDE_IIC	//使用自带的io模拟iic
#ifdef INA_INSIDE_IIC	
		#define IIC_PORT	GPIOA																				//IIC IO端口
		#define IIC_RCC 	RCC_APB2Periph_GPIOA												//端口时钟
		#define IIC_SDA GPIO_Pin_5																		//SDA引脚
		#define IIC_SDA_H	GPIO_SetBits(IIC_PORT,IIC_SDA)							//拉高SDA
		#define IIC_SDA_L	GPIO_ResetBits(IIC_PORT,IIC_SDA)						//拉低SDA
		#define IIC_SDA_READ()	GPIO_ReadInputDataBit(GPIOA,IIC_SDA)	//读取SDA

		#define IIC_SCL GPIO_Pin_6																		//SCL引脚
		#define IIC_SCL_H	GPIO_SetBits(IIC_PORT,IIC_SCL)							//拉高SCL
		#define IIC_SCL_L	GPIO_ResetBits(IIC_PORT,IIC_SCL)						//拉低SCL
#endif

void INA_Init(void );
unsigned int INA_GET_Voltage_MV(void);//获取电压（单位：mv）
unsigned int INA_GET_Current_MA(void);//获取电流（单位：mA）
unsigned int INA_GET_Power_MW(void);	//获取当前功率（单位：mw）
unsigned int INA_GET_R_MV(void);
#endif



　

审核编辑：汤梓红