鸿蒙硬件HI3861-INA226-电压测量(外挂方案)

ina226.c

#include "ina226.h"
#include <stdio.h>
#include "cmsis_os2.h"
#include "wifiiot_gpio.h"
#include "wifiiot_gpio_ex.h"
#include <hi_stdlib.h>
#include "wifiiot_i2c.h"
#include "ina226util.h"


//定义配置数据
#define 	INA226_VAL_LSB	2.5f	//分流电压 LSB 2.5uV
#define     Voltage_LSB		1.25f   //总线电压 LSB 1.25mV
#define     CURRENT_LSB 	1.0f 	//电流LSB 1mA
#define     POWER_LSB       25*CURRENT_LSB
#define     CAL             456     //0.00512/(Current_LSB*R_SHUNT) = 470  //电流偏大改小


void INA226_INIT(void){
	INA226_SendData(INA226_I2CWRITE_ADDRESS,CFG_REG,0x484f);
	INA226_SendData(INA226_I2CWRITE_ADDRESS,CAL_REG,CAL);

}

void INA226_SendData(hi_u8 addr,hi_u8 reg,hi_u16 data){
	hi_u8 write_data[3];
	WifiIotI2cIdx id = INA226_I2C_IDX;
    WifiIotI2cData i2cData = {0};

	write_data[0] = reg;
	write_data[1] = (hi_u8)(data>>8);
	write_data[2] = (hi_u8)(data&0x00FF);

    i2cData.sendBuf = write_data;
    i2cData.sendLen = 3;

	
    I2cWrite(id, addr, &i2cData);
}

hi_u16 INA226_ReadData(hi_u8 addr){
	hi_u16 temp = 0;

	hi_u8 writeBuf[1] = {0};
    WifiIotI2cIdx id = INA226_I2C_IDX;
    WifiIotI2cData i2cData = {0};
    writeBuf[0] = addr;
    i2cData.sendBuf = writeBuf;
    i2cData.sendLen = 1;

    I2cWrite(id, INA226_I2CWRITE_ADDRESS, &i2cData);

    hi_u8 readBuf[5] = {0};
    WifiIotI2cData i2cRData = {0};
    i2cRData.receiveBuf = readBuf;
    i2cRData.receiveLen = 2;

    I2cRead(id, INA226_I2CWRITE_ADDRESS,&i2cRData);

	temp = readBuf[0];
	temp<<=8;	
	temp |= readBuf[1];

	return temp;
}

//1.25mV/bit
hi_u16 INA226_GetVoltage()
{
	hi_u16 temp = 0;
	temp = INA226_ReadData(0x02);
	return (hi_u16)temp;	
}
 
//2.5uV/bit
hi_u16 INA226_GetShuntVoltage()
{
	int16_t temp = 0;
	temp = INA226_ReadData(0x01);
	if(temp&0x8000)	temp = ~(temp - 1);	
	return (hi_u16)temp;	
}


//获取电压
float GetVoltage(){	//mV
	return (INA226_GetVoltage()*Voltage_LSB);
}
 
//获取分流电压
float Get_Shunt_voltage(){	//uV
	return ((INA226_GetShuntVoltage()*INA226_VAL_LSB));
}

ina226.h

#ifndef INA226UTIL_H
#define INA226UTIL_H

#include <hi_types_base.h>

#define 	CFG_REG	 		0x00		//
#define 	SV_REG 			0x01		//分流电压， 此处分流电阻为 0.1欧
#define 	BV_REG 			0x02		//总线电压
#define 	PWR_REG 		0x03		//电源功率
#define 	CUR_REG 		0x04		//电流
#define 	CAL_REG 		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 	INA226_GET_ADDR 0xFF		//包含唯一的芯片标识号

#define INA226_I2C_IDX WIFI_IOT_I2C_IDX_0
#define INA226_I2CWRITE_ADDRESS 0x80
#define INA226_I2CREAD_ADDRESS 0x81

void INA226_INIT(void);
void INA226_SendData(hi_u8 addr,hi_u8 reg,hi_u16 data);
hi_u16 INA226_ReadData(hi_u8 addr);
float Get_Shunt_voltage(void);
float GetVoltage(void);
hi_u16 INA226_GetShuntVoltage(void);
hi_u16 INA226_GetVoltage(void);


#endif

测试代码

#include "ina226.h"
#include <stdio.h>
#include "cmsis_os2.h"
#include "wifiiot_gpio.h"
#include "wifiiot_gpio_ex.h"
#include <hi_stdlib.h>
#include "wifiiot_i2c.h"
#include "ina226util.h"



static void *Ina226Task(const char *arg){
    (void)arg;

    printf("Ina226Task start \r\n");
    //INA226_ReadData(0x00);
    INA226_INIT();
    osDelay(10);

    while(1){

        printf("电压：%f \r\n",GetVoltage());
        //Get_Shunt_voltage();

        osDelay(100);

    }
    return NULL;
}

void Ina226Init(void){        // 在主函数中调用此函数
    osThreadAttr_t attr;

    attr.name = "Ina226Task";
    attr.attr_bits = 0U;
    attr.cb_mem = NULL;
    attr.cb_size = 0U;
    attr.stack_mem = NULL;
    attr.stack_size = 10240;
    attr.priority = 26;

    GpioInit();
    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_13, WIFI_IOT_IO_FUNC_GPIO_13_I2C0_SDA);
    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_14, WIFI_IOT_IO_FUNC_GPIO_14_I2C0_SCL);
    I2cInit(WIFI_IOT_I2C_IDX_0, 400*1000);

    osDelay(10);

    if (osThreadNew((osThreadFunc_t)Ina226Task, NULL, &attr) == NULL) {
        printf("[Ina226Demo] Falied to create Ina226Task!\n");
    }
}

INA226 

INA226配置寄存器

RST ：复位

AVG：取平均数模

V BUS CT ： 总线电压转换时间

V SH CT ： 分流电压转换时间

MODE ： 操作模式

接线

总 线 电 压 寄 存器 器 02h 

INA226中文数据手册

https://download.csdn.net/download/qq_33259323/15107124 免费下载

如有问题可以找我https://space.bilibili.com/309103931