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INA3221的使用教程（IIC）

INA3221的使⽤教程（IIC）

INA3221使⽤⽅法和INA226基本上⼀致，多了选择多通道读取，根据数据⼿册制定不⼀样的初始化代码。INA3221不能够直接读分流电阻的电流，但可以通过算得两端电压算出电流。

上代码：

INA3221.c:

#include "INA3221.h"

static void delay_nns_3221(uint16_t D) //30纳秒ns 根据⼿册要⽤到IIC的HS⾼速模式

{

while(--D);

}

void delay_nms_3221(uint16_t ms) //毫秒

{

uint16_t i;

uint32_t M = 0;//720W

for(i = 0;i < ms; i++)

for(M=12000;M > 0;M--);

}

void delay_nus_3221(uint16_t us)//微秒

{

uint16_t i;

uint16_t M = 0;//720W

for(i = 0;i < us; i++)

for(M=72;M > 0;M--);

}

/****************IIC***************************/

void INA3221_IIC_Init(void)

{

GPIO_InitTypeDef GPIO_Initure;

__HAL_RCC_GPIOB_CLK_ENABLE(); //使能GPIOB时钟

//PC11,12初始化设置

GPIO_Initure.Pin=GPIO_PIN_6|GPIO_PIN_7;//PB6SCL PB7SDA

GPIO_Initure.Mode=GPIO_MODE_OUTPUT_PP; //推挽输出

GPIO_Initure.Pull=GPIO_PULLUP; //上拉

GPIO_Initure.Speed=GPIO_SPEED_FREQ_HIGH; //⾼速

HAL_GPIO_Init(GPIOB,&GPIO_Initure);

IIC_SDA_H_3221;

电阻丝

IIC_SCL_H_3221;

delay_nms_3221(5);

}

mvr蒸发浓缩void INA3221_IIC_Start(void)

{

IIC_SDA_H_3221;

IIC_SCL_H_3221;

delay_nns_3221(5);

IIC_SDA_L_3221;//START:when CLK is high,DATA change form high to low

delay_nns_3221(5);

IIC_SCL_L_3221;//钳住I2C总线，准备发送或接收数据

delay_nns_3221(5);

}

void INA3221_IIC_Stop(void)

{

IIC_SDA_L_3221;//STOP:when CLK is high DATA change form low to high

delay_nns_3221(5);

IIC_SCL_H_3221;

delay_nns_3221(5);

IIC_SDA_H_3221;//发送I2C总线结束信号

delay_nns_3221(5);

}

void INA3221_IIC_Ack(void)

{

IIC_SDA_L_3221;

delay_nns_3221(5);

IIC_SCL_H_3221;

delay_nns_3221(5);

IIC_SCL_L_3221;

delay_nns_3221(5);

IIC_SDA_H_3221;

}

void INA3221_IIC_NAck(void)

{

IIC_SDA_H_3221;

delay_nns_3221(5);

IIC_SCL_H_3221;

delay_nns_3221(5);

IIC_SCL_L_3221;

delay_nns_3221(5);

IIC_SDA_L_3221;

}

uint8_t INA3221_IIC_Wait_Ack(void)

{

uint8_t ucErrTime=0;

//SDA_IN(); //SDA设置为输⼊

IIC_SDA_H_3221;

delay_nns_3221(5);

IIC_SCL_H_3221;

delay_nns_3221(5);

while(READ_SDA_3221)

{

ucErrTime++;

if(ucErrTime>250)

{

INA3221_IIC_Stop();

return1;

}

IIC_SCL_L_3221;//时钟输出0

return0;

}

void INA3221_IIC_Send_Byte(uint8_t txd)

{

IIC_SCL_L_3221;//拉低时钟开始数据传输

for(uint8_t i = 0;i < 8;i++)

{

if(txd&0x80)

IIC_SDA_H_3221;

else

IIC_SDA_L_3221;

txd<<=1;

IIC_SCL_H_3221;

delay_nns_3221(5);

IIC_SCL_L_3221;

纳米碳化硅

delay_nns_3221(5);

}

// IIC_SDA_H_3221;

// IIC_SCL_H_3221; //当去掉wait_ack时的时候添加

// delay_nns_3221(5);

//IIC_SCL_L_3221;

}

uint8_t INA3221_IIC_Read_Byte(unsigned char ack)

{

uint8_t TData=0,i;

for(i=0;i<8;i++)

{

IIC_SCL_H_3221;

delay_nns_3221(5);

TData=TData<<1;

//if(GPIOB->IDR& GPIO_IDR_IDR7) //判断SDA是否为⾼

if(SDA_READ_3221)

{

TData|=0x01;

}

IIC_SCL_L_3221;

delay_nns_3221(5);

}

if(!ack)

INA3221_IIC_NAck();

else

INA3221_IIC_Ack();

// IIC_SCL_L_3221;

// delay_nns_3221(5);

// IIC_SDA_L_3221;

// delay_nns_3221(5); //ACK

// IIC_SCL_H_3221;

// delay_nns_3221(5);

/ IIC_SCL_L_3221;

// delay_nns_3221(5);

// IIC_SDA_H_3221;

return TData;

}

/**********************IIC_END*************************/

void INA3221_Init(void)

{

INA3221_IIC_Init();

//HAL_Delay(10);

INA3221_SendData(0x82 ,CFG_REG_3221,0x8000);//软件复位 INA3221_SendData(0x84 ,CFG_REG_3221,0x8000);

HAL_Delay(10);

INA3221_SendData(0x82 ,CFG_REG_3221,0x7127);//7127

INA3221_SendData(0x84 ,CFG_REG_3221,0x7127);

// HAL_Delay(2);

// INA3221_SendData(0x82, 0x01, 0x00);

// INA3221_SendData(0x82, 0x03, 0x00);

// INA3221_SendData(0x82, 0x05, 0x00);

// INA3221_SendData(0x84, 0x01, 0x00);

// INA3221_SendData(0x84, 0x03, 0x00);

// INA3221_SendData(0x84, 0x05, 0x00);

}

void INA3221_SendData(uint8_t addr,uint8_t reg,uint16_t data)

{

uint8_t temp = 0;

INA3221_IIC_Start();

INA3221_IIC_Send_Byte(addr);

INA3221_IIC_Wait_Ack();

INA3221_IIC_Send_Byte(reg);

INA3221_IIC_Wait_Ack();

temp = (uint8_t)(data>>8);

INA3221_IIC_Send_Byte(temp);

INA3221_IIC_Wait_Ack();

temp = (uint8_t)(data&0x00FF);

INA3221_IIC_Send_Byte(temp);

INA3221_IIC_Wait_Ack();

INA3221_IIC_Stop();

}

void INA3221_SetRegPointer(uint8_t addr,uint8_t reg)

{

INA3221_IIC_Start();

INA3221_IIC_Send_Byte(addr);

INA3221_IIC_Wait_Ack();

INA3221_IIC_Send_Byte(reg);

INA3221_IIC_Wait_Ack();

INA3221_IIC_Stop();

}

uint16_t INA3221_ReadData(uint8_t addr)

{

uint16_t temp=0;

INA3221_IIC_Start();

INA3221_IIC_Send_Byte(addr+1);

INA3221_IIC_Wait_Ack();

temp = INA3221_IIC_Read_Byte(1);

temp<<=8;

temp |= INA3221_IIC_Read_Byte(0);

INA3221_IIC_Stop();

return temp;淀粉牙签

}

uint16_t INA3221_GetVoltage(uint8_t addr,uint8_t channel)

{

uint32_t temp=0;

switch(channel)

{

case1:INA3221_SetRegPointer(addr,0x02);break;

轴流式压气机case2:INA3221_SetRegPointer(addr,0x04);break;

case3:INA3221_SetRegPointer(addr,0x06);break;

default:break;

}

temp = INA3221_ReadData(addr);//printf("\r\n temp = %d",temp);

if(temp&0x8000) temp = ~(temp - 1);

return (uint16_t)temp;

// return (u16)temp;

}

//40uV/bit

uint16_t INA3221_GetShuntVoltage(uint8_t addr,uint8_t channel)

{

uint32_t temp=0;

switch(channel)

{

case1:INA3221_SetRegPointer(addr,0x01);break;

case2:INA3221_SetRegPointer(addr,0x03);break;

case3:INA3221_SetRegPointer(addr,0x05);break;

default:break;

}

temp = INA3221_ReadData(addr);

if(temp&0x8000) temp = ~(temp - 1);

return (uint16_t)temp;

电磁炉热水器}

//1mA/bit

//long INA226_GetShunt_Current(u8 addr)

//{

// long temp=0;

// INA226_SetRegPointer(addr,CUR_REG);

// temp = INA226_ReadData(addr);

// if(temp&0x8000)

// {

// temp = ~(temp - 1);

/ temp = (u16)temp - 2 * (u16)temp;

// }

// return temp;

//}

View Code

INA3221.h:

#ifndef __INA3221_H

#define __INA3221_H

#include "main.h"

#define CFG_REG_3221 0x00 //

#define SV_REG_3221 0x01 //分流电压，此处分流电阻为 0.1欧

#define BV_REG_3221 0x02 //总线电压

#define PWR_REG_3221 0x03 //电源功率

#define CUR_REG_3221 0x04 //电流

#define CAL_REG_3221 0x05 //校准，设定满量程范围以及电流和功率测数的

//#define ONFF_REG 0x06 //屏蔽使能警报配置和转换准备就绪

//#define AL_REG 0x07 //包含与所选警报功能相⽐较的限定值

#define INA3221_GET_ADDR 0XFF //包含唯⼀的芯⽚标识号

#define INA3221_ADDR1 0x80

//IO操作

#define IIC_SCL_H_3221 HAL_GPIO_WritePin(GPIOB,GPIO_PIN_6,GPIO_PIN_SET) //SCL H #define IIC_SCL_L_3221 HAL_GPIO_WritePin(GPIOB,GPIO_PIN_6,GPIO_PIN_RESET) //SCL H #define IIC_SDA_H_3221 HAL_GPIO_WritePin(GPIOB,GPIO_PIN_7,GPIO_PIN_SET) //SDA_H #d

efine IIC_SDA_L_3221 HAL_GPIO_WritePin(GPIOB,GPIO_PIN_7,GPIO_PIN_RESET) //SDA_L #define READ_SDA_3221 HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_7) //输⼊SDA

#define SDA_READ_3221 GPIOB->IDR& GPIO_IDR_IDR7

static void delay_nns_3221(uint16_t D);

void delay_nms_3221(uint16_t ms) ;

void delay_nus_3221(uint16_t us);

void INA3221_IIC_Init(void);

void INA3221_IIC_Start(void);

void INA3221_IIC_Stop(void);

void INA3221_IIC_Ack(void);

void INA3221_IIC_NAck(void);

uint8_t INA3221_IIC_Wait_Ack(void);

void INA3221_IIC_Send_Byte(uint8_t txd);

uint8_t INA3221_IIC_Read_Byte(unsigned char ack);

void INA3221_Init(void);

void INA3221_SendData(uint8_t addr,uint8_t reg,uint16_t data);

void INA3221_SetRegPointer(uint8_t addr,uint8_t reg);

uint16_t INA3221_ReadData(uint8_t addr);

uint16_t INA3221_GetVoltage(uint8_t addr,uint8_t channel);

uint16_t INA3221_GetShuntVoltage(uint8_t addr,uint8_t channel);

#endif

View Code

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