【STM32 开发】| INA219采集电压、电流值

2023-11-09 15:13
文章标签 开发 stm32 采集 电压 电流值 ina219

本文主要是介绍【STM32 开发】| INA219采集电压、电流值，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

目录

  • 前言
  • 1 原理图
  • 2 IIC地址说明
  • 3 寄存器地址说明
  • 4 开始工作前配置
  • 5 程序代码
    • 1）驱动程序
    • 2）头文件
    • 3) 测试代码

前言

INA219 是一款具备 I2C 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）。I2C 或 SMBUS 兼容接口 具有 16 个可编程地址。

INA219 可在 0V 至 26V 范围内感测总线中的分压。该器件由 3V 至 5.5V 单电源供电，电源的最大流耗为1mA。INA219 的工作温度范围为 -40°C 至 125°C。

1 原理图

在这里插入图片描述

2 IIC地址说明

在这里插入图片描述
此测试时A0、A1都下拉接地，所以INA219的IIC通信地址为1000000B

3 寄存器地址说明

在这里插入图片描述

  • 0x00 配置寄存器，用来配置工作模式、采集范围以及其他参数
  • 0x01 分流电阻两端的电压
  • 0x02 总线电压（IN-到GND的电压差）
  • 0x03 功率
  • 0x04 经过分流电阻两端的电流
  • 0x05 校准寄存器，用于对测量结果进行校准

4 开始工作前配置

  • 0x00 寄存器Bit 13：设置检测最大检测电压 0 = 16V，1 = 32V （此处项目需要测3V到5V的电压，故设置Bit 13 为 0）
  • 0x00 寄存器Bit 11-12：设置总线分流电阻最大的电压（此处项目需要测0A到5A的电流，故设置Bit 11-12 为 01，即量程±80mV，可测电流±8A）
  • 0x00 寄存器Bit 0-2：设置工作模式（默认）
  • 0x05 寄存器：设置基准值（根据需要测的电压、电流范围再套入公式得出结果）

由以下公式可得出0x05的配置值。
C a l = t r u n c ( 0.04096 C u r r e n t L S B × R s h u n t ) Cal = trunc\left ( \frac{0.04096}{CurrentLSB\times Rshunt} \right ) Cal=trunc(CurrentLSB×Rshunt0.04096​)
C u r r e n t L S B = M a x i m u m E x p e c t e d C u r r e n t 2 15 CurrentLSB = \frac{Maximum Expected Current}{2^{15}} CurrentLSB=215MaximumExpectedCurrent​

数据手册说明文档
在这里插入图片描述

5 程序代码

1）驱动程序

#include "main.h"
#include "ina219aidcnr_helper.h"uint16_t ina219_calibrationValue;
uint16_t ina219_currentDivider_mA;
float ina219_powerMultiplier_mW;/*** @brief  The IIC reads 16bit data from the specified register address.* @param  ina219 Slave configuration structure of the IIC.* @param  registerAddress Internal memory address.* @return 16 bit register data.*/
uint16_t INA219_ReadDataForRegister_16Bits(INA219_t *ina219, uint8_t registerAddress)
{uint8_t Value[2];HAL_I2C_Mem_Read(ina219->ina219_i2c, (INA219_ADDRESS<<1), registerAddress, 1, Value, 2, 1000);return ((Value[0] << 8) | Value[1]);
}/*** @brief  Writes 16 bits of data to the register.* @param  ina219 Slave configuration structure of the IIC.* @param  registerAddress Internal memory address.* @param  Value 16 bits of data to be written.*/
void INA219_WriteDataToRegister_16Bits(INA219_t *ina219, uint8_t registerAddress, uint16_t Value)
{uint8_t regAddr[2];/* High Byte */regAddr[0] = (Value >> 8) & 0xff;/* Low Byte */regAddr[1] = (Value >> 0) & 0xff;HAL_I2C_Mem_Write(ina219->ina219_i2c, (INA219_ADDRESS<<1), registerAddress, 1, (uint8_t*)regAddr, 2, 1000);
}/*** @brief  Read bus voltage.* @param  ina219 Slave configuration structure of the IIC.* @return Read voltage value, unit mV.*/
uint16_t INA219_ReadBusVoltage(INA219_t *ina219)
{uint16_t result = INA219_ReadDataForRegister_16Bits(ina219, INA219_REG_BUS_VOLTAGE);/* return mV */return ((result >> 3  ) * 4);
}/*** @brief  Read current register value.* @param  ina219 Slave configuration structure of the IIC.* @return Current register value.*/
uint16_t INA219_ReadCurrentRaw(INA219_t *ina219)
{uint16_t result = INA219_ReadDataForRegister_16Bits(ina219, INA219_REG_CURRENT);return (result);
}/*** @brief  Read current register value, unit mA.* @param  ina219 Slave configuration structure of the IIC.* @return Current value.*/
uint16_t INA219_ReadCurrent_mA(INA219_t *ina219)
{uint16_t result = INA219_ReadCurrentRaw(ina219);return (result / ina219_currentDivider_mA);
}/*** @brief  Read current register value, unit mV.* @param  ina219 Slave configuration structure of the IIC.* @return Shunt Voltage value.*/
uint16_t INA219_ReadShuntVoltage_mV(INA219_t *ina219)
{uint16_t result = INA219_ReadDataForRegister_16Bits(ina219, INA219_REG_SHUNT_VOLTAGE);/* When multiple sign bits are present, they will all be the same value.* Negative numbers are represented in 2's complement format.* Generate the 2's complement of a negative number by complementing the absolute value binary number and adding 1.* Extend the sign, denoting a negative number by setting the MSB = 1.* Extend the sign to any additional sign bits to form the 16-bit word. */if(result > MAX_SHUNT_RANGE){result = 65536 - MAX_SHUNT_RANGE;}/* Shunt voltage, unit mV. */return (result / 100);
}/*** @brief  INA219 system reset.* @param  ina219 Slave configuration structure of the IIC.*/
void INA219_Reset(INA219_t *ina219)
{INA219_WriteDataToRegister_16Bits(ina219, INA219_REG_CONFIG, INA219_CONFIG_RESET);HAL_Delay(1);
}/*** @brief Set calibration register.* @param ina219 Slave configuration structure of the IIC.* @param calibrationData Calibrated data.*/
void INA219_SetCalibration(INA219_t *ina219, uint16_t calibrationData)
{INA219_WriteDataToRegister_16Bits(ina219, INA219_REG_CALIBRATION, calibrationData);
}/*** @brief  Gets the value of the configuration register.* @param  ina219 Slave configuration structure of the IIC.* @return Configuration Register value.*/
uint16_t INA219_GetConfigInfo(INA219_t *ina219)
{uint16_t result = INA219_ReadDataForRegister_16Bits(ina219, INA219_REG_CONFIG);return result;
}/*** @brief Set configuration register.* @param ina219 Slave configuration structure of the IIC.* @param configData Configuration data.*/
void INA219_SetConfig(INA219_t *ina219, uint16_t configData)
{INA219_WriteDataToRegister_16Bits(ina219, INA219_REG_CONFIG, configData);
}/*** @brief The measurement results are calibrated. Voltage range is 16V, Current range is 8A.* @param ina219 Slave configuration structure of the IIC.*/
void INA219_SetCalibration_16V_8A(INA219_t *ina219)
{uint16_t configInfo = INA219_CONFIG_VOLTAGE_RANGE_16V |INA219_CONFIG_GAIN_2_80MV | INA219_CONFIG_BADCRES_12BIT |INA219_CONFIG_SADCRES_12BIT_1S_532US |INA219_CONFIG_MODE_SANDBVOLT_CONTINUOUS;// Current_LSB = Maximum Expected Current / 2^15 = (80 / 10) / 2^15 = 0.0002// Cal = 0.04096 / (Current_LSB / R) = 0.04096 / (0.0002A * 0.01R) = 20480 = 0x5000// Calibration Register = 20480ina219_calibrationValue = 20480;// 1mA = Current_LSB * bits = 200uA * 5bit (5 bit/mA)ina219_currentDivider_mA = 5;// 1mW = Power_LSB * bits = 4mW * 0.25bit (0.25f bit/mW)ina219_powerMultiplier_mW = 0.25f;INA219_SetCalibration(ina219, ina219_calibrationValue);INA219_SetConfig(ina219, configInfo);
}/*** @brief  Ina219 driver initialization* @param  ina219 Slave configuration structure of the IIC.* @param  i2c Pointer to a I2C_HandleTypeDef structure that contains*             the configuration information for the specified I2C.* @param  Address  Configuration data.* @return status.*/
uint8_t INA219_Init(INA219_t *ina219, I2C_HandleTypeDef *i2c, uint8_t Address)
{ina219->ina219_i2c = i2c;ina219->Address = Address;ina219_currentDivider_mA = 0;ina219_powerMultiplier_mW = 0;uint8_t ina219_isReady = HAL_I2C_IsDeviceReady(i2c, (Address << 1), 3, 2);if(ina219_isReady == HAL_OK){INA219_Reset(ina219);INA219_SetCalibration_16V_8A(ina219);return 1;}else{return 0;}
}

2）头文件


#ifndef INA219AIDCNR_HELPER_H
#define INA219AIDCNR_HELPER_H#define INA219_ADDRESS 							        (0x40)
#define MAX_SHUNT_RANGE                     			(0x0FA0)/* Register */
#define	INA219_REG_CONFIG						        (0x00)
#define	INA219_REG_SHUNT_VOLTAGE				    	(0x01)
#define	INA219_REG_BUS_VOLTAGE					    	(0x02)
#define	INA219_REG_POWER						        (0x03)
#define	INA219_REG_CURRENT						      	(0x04)
#define	INA219_REG_CALIBRATION					    	(0x05)
//
#define INA219_CONFIG_RESET 					      	(0x8000)
//
#define INA219_CONFIG_VOLTAGE_RANGE_16V					(0x0000)      // 0-16V Range
#define INA219_CONFIG_VOLTAGE_RANGE_32V					(0x2000)      // 0-32V Range#define	INA219_CONFIG_GAIN_1_40MV				    	(0x0000)      // Gain 1, 40mV Range
#define	INA219_CONFIG_GAIN_2_80MV				    	(0x0800)      // Gain 2, 80mV Range
#define	NA219_CONFIG_GAIN_4_160MV				    	(0x1000)      // Gain 4, 160mV Range
#define	INA219_CONFIG_GAIN_8_320MV				  		(0x1800)      // Gain 8, 320mV Range#define	INA219_CONFIG_BADCRES_9BIT				      	(0x0000)  // 9-bit bus res = 0..511
#define	INA219_CONFIG_BADCRES_10BIT				      	(0x0080)  // 10-bit bus res = 0..1023
#define	INA219_CONFIG_BADCRES_11BIT				      	(0x0100)  // 11-bit bus res = 0..2047
#define	INA219_CONFIG_BADCRES_12BIT				      	(0x0180)  // 12-bit bus res = 0..4097
#define	INA219_CONFIG_BADCRES_12BIT_2S_1060US 			(0x0480)  // 2 x 12-bit bus samples averaged together
#define	INA219_CONFIG_BADCRES_12BIT_4S_2130US	  		(0x0500)  // 4 x 12-bit bus samples averaged together
#define	INA219_CONFIG_BADCRES_12BIT_8S_4260US	  		(0x0580)  // 8 x 12-bit bus samples averaged together
#define	INA219_CONFIG_BADCRES_12BIT_16S_8510US			(0x0600)  // 16 x 12-bit bus samples averaged together
#define	INA219_CONFIG_BADCRES_12BIT_32S_17MS	  		(0x0680)  // 32 x 12-bit bus samples averaged together
#define	INA219_CONFIG_BADCRES_12BIT_64S_34MS	  		(0x0700)  // 64 x 12-bit bus samples averaged together
#define	INA219_CONFIG_BADCRES_12BIT_128S_69MS	  		(0x0780)  // 128 x 12-bit bus samples averaged together#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					        0x07
#define	INA219_CONFIG_MODE_POWERDOWN			       	0x00
#define	INA219_CONFIG_MODE_SVOLT_TRIGGERED		   		0x01
#define	INA219_CONFIG_MODE_BVOLT_TRIGGERED		   		0x02
#define	INA219_CONFIG_MODE_SANDBVOLT_TRIGGERED	 		0x03
#define	INA219_CONFIG_MODE_ADCOFF				        0x04
#define	INA219_CONFIG_MODE_SVOLT_CONTINUOUS		   		0x05
#define	INA219_CONFIG_MODE_BVOLT_CONTINUOUS		   		0x06
#define	INA219_CONFIG_MODE_SANDBVOLT_CONTINUOUS  		0x07typedef struct
{I2C_HandleTypeDef 	*ina219_i2c;uint8_t				Address;
} INA219_t;uint8_t INA219_Init(INA219_t *ina219, I2C_HandleTypeDef *i2c, uint8_t Address);
uint16_t INA219_ReadBusVoltage(INA219_t *ina219);
uint16_t INA219_ReadCurrent_mA(INA219_t *ina219);
uint16_t INA219_ReadCurrent_raw(INA219_t *ina219);
uint16_t INA219_ReadShuntVoltage_mV(INA219_t *ina219);
uint16_t INA219_ReadDataForRegister_16Bits(INA219_t *ina219, uint8_t registerAddress);
uint16_t INA219_GetConfigInfo(INA219_t *ina219);void INA219_Reset(INA219_t *ina219);
void INA219_SetCalibration(INA219_t *ina219, uint16_t calibrationData);
void INA219_SetConfig(INA219_t *ina219, uint16_t configData);
void INA219_SetCalibration_16V_8A(INA219_t *ina219);
void INA219_WriteDataToRegister_16Bits(INA219_t *ina219, uint8_t registerAddress, uint16_t Value);#endif //INA219AIDCNR_HELPER_H

3) 测试代码

int main(void)
{/* USER CODE BEGIN 1 */uint16_t vbus, vshunt, current;/* USER CODE END 1 *//* MCU Configuration--------------------------------------------------------*//* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* USER CODE BEGIN Init *//* USER CODE END Init *//* Configure the system clock */SystemClock_Config();/* USER CODE BEGIN SysInit *//* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();MX_USART1_UART_Init();MX_I2C2_Init();/* USER CODE BEGIN 2 */while(!INA219_Init(&ina219, &hi2c2, INA219_ADDRESS)){}/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE *//* USER CODE BEGIN 3 */vbus = INA219_ReadBusVoltage(&ina219);vshunt = INA219_ReadShuntVoltage_mV(&ina219);current = INA219_ReadCurrent_mA(&ina219);sprintf(strBuffer, "INA219 param: vbus:%d mV; current:%d mA\r\n", vbus, current);HAL_UART_Transmit(&huart1, strBuffer, strlen(strDataBuf), 0xff);UserDelay_ms(500);}

这篇关于【STM32 开发】| INA219采集电压、电流值的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！


http://www.chinasem.cn/article/376903。

相关文章

使用Python开发一个带EPUB转换功能的Markdown编辑器

使用Python开发一个带EPUB转换功能的Markdown编辑器

《使用Python开发一个带EPUB转换功能的Markdown编辑器》Markdown因其简单易用和强大的格式支持,成为了写作者、开发者及内容创作者的首选格式,本文将通过Python开发一个Markd... 目录应用概览代码结构与核心组件1. 初始化与布局 (__init__)2. 工具栏 (setup_t
阅读更多...
Spring Shell 命令行实现交互式Shell应用开发

Spring Shell 命令行实现交互式Shell应用开发

《SpringShell命令行实现交互式Shell应用开发》本文主要介绍了SpringShell命令行实现交互式Shell应用开发,能够帮助开发者快速构建功能丰富的命令行应用程序,具有一定的参考价... 目录引言一、Spring Shell概述二、创建命令类三、命令参数处理四、命令分组与帮助系统五、自定义S
阅读更多...
Python通过模块化开发优化代码的技巧分享

Python通过模块化开发优化代码的技巧分享

《Python通过模块化开发优化代码的技巧分享》模块化开发就是把代码拆成一个个“零件”,该封装封装,该拆分拆分,下面小编就来和大家简单聊聊python如何用模块化开发进行代码优化吧... 目录什么是模块化开发如何拆分代码改进版：拆分成模块让模块更强大：使用 __init__.py你一定会遇到的问题模www.
阅读更多...
Spring Security基于数据库的ABAC属性权限模型实战开发教程

Spring Security基于数据库的ABAC属性权限模型实战开发教程

《SpringSecurity基于数据库的ABAC属性权限模型实战开发教程》：本文主要介绍SpringSecurity基于数据库的ABAC属性权限模型实战开发教程,本文给大家介绍的非常详细,对大... 目录1. 前言2. 权限决策依据RBACABAC综合对比3. 数据库表结构说明4. 实战开始5. MyBA
阅读更多...
使用Python开发一个简单的本地图片服务器

使用Python开发一个简单的本地图片服务器

《使用Python开发一个简单的本地图片服务器》本文介绍了如何结合wxPython构建的图形用户界面GUI和Python内建的Web服务器功能,在本地网络中搭建一个私人的,即开即用的网页相册,文中的示... 目录项目目标核心技术栈代码深度解析完整代码工作流程主要功能与优势潜在改进与思考运行结果总结你是否曾经
阅读更多...
Spring Boot + MyBatis Plus 高效开发实战从入门到进阶优化(推荐)

Spring Boot + MyBatis Plus 高效开发实战从入门到进阶优化(推荐)

《SpringBoot+MyBatisPlus高效开发实战从入门到进阶优化(推荐)》本文将详细介绍SpringBoot+MyBatisPlus的完整开发流程,并深入剖析分页查询、批量操作、动... 目录Spring Boot + MyBATis Plus 高效开发实战：从入门到进阶优化1. MyBatis
阅读更多...
Python基于wxPython和FFmpeg开发一个视频标签工具

Python基于wxPython和FFmpeg开发一个视频标签工具

《Python基于wxPython和FFmpeg开发一个视频标签工具》在当今数字媒体时代,视频内容的管理和标记变得越来越重要,无论是研究人员需要对实验视频进行时间点标记,还是个人用户希望对家庭视频进行... 目录引言1. 应用概述2. 技术栈分析2.1 核心库和模块2.2 wxpython作为GUI选择的优
阅读更多...
利用Python开发Markdown表格结构转换为Excel工具

利用Python开发Markdown表格结构转换为Excel工具

《利用Python开发Markdown表格结构转换为Excel工具》在数据管理和文档编写过程中,我们经常使用Markdown来记录表格数据,但它没有Excel使用方便,所以本文将使用Python编写一... 目录1.完整代码2. 项目概述3. 代码解析3.1 依赖库3.2 GUI 设计3.3 解析 Mark
阅读更多...
利用Go语言开发文件操作工具轻松处理所有文件

利用Go语言开发文件操作工具轻松处理所有文件

《利用Go语言开发文件操作工具轻松处理所有文件》在后端开发中,文件操作是一个非常常见但又容易出错的场景,本文小编要向大家介绍一个强大的Go语言文件操作工具库,它能帮你轻松处理各种文件操作场景... 目录为什么需要这个工具？核心功能详解1. 文件/目录存javascript在性检查2. 批量创建目录3. 文件
阅读更多...
基于Python开发批量提取Excel图片的小工具

基于Python开发批量提取Excel图片的小工具

《基于Python开发批量提取Excel图片的小工具》这篇文章主要为大家详细介绍了如何使用Python中的openpyxl库开发一个小工具,可以实现批量提取Excel图片,有需要的小伙伴可以参考一下... 目前有一个需求，就是批量读取当前目录下所有文件夹里的Excel文件，去获取出Excel文件中的图片，并
阅读更多...

Copyright China编程 23002807@qq.com

沪ICP备2023033072号-2