I2C_IIC 电流

RTduino添加INA219软件包，使用IIC通信读取数据不正常？

发布于 2024-03-29 10:44:51 浏览：391 订阅该版

BSP路径：rt-thread-master\bsp\stm32\stm32f103-blue-pill
问题描述：

![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20240329/8d32aa0bf73c2fa645b407aaca532d67.png)
添加软件包INA219
开启IIC硬件

![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20240329/fb2b46b560bdd0425ea6b8cc8413da88.png.webp)

![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20240329/fca4ffab708878a39693f3d3acf4939d.png.webp)

![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20240329/e38ed2af58ccfc25564695f67be368c5.png)
编译仿真程序后测试，发现以下IIC初始化断点处未执行。

![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20240329/d59394b5d27b69a653970ba958936980.png.webp)
list device查看是有IIC总线的
![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20240329/43071945c9af9992a998067229f35ea2.png)
INA219返回数据一直是这个

![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20240329/33578ad06747dc6cf7e0122ae882f113.png)

```c
//arduino_main.cpp代码如下
	#include <Wire.h>
#include <Adafruit_INA219.h>

Adafruit_INA219 ina219;

void setup(void) 
{
  Serial.begin(115200);
  while (!Serial) {
      // will pause Zero, Leonardo, etc until serial console opens
      delay(1);
  }
    
  Serial.println("Hello!");
  
  // Initialize the INA219.
  // By default the initialization will use the largest range (32V, 2A).  However
  // you can call a setCalibration function to change this range (see comments).
  if (! ina219.begin()) {
    Serial.println("Failed to find INA219 chip");
    while (1) { delay(10); }
  }
  // To use a slightly lower 32V, 1A range (higher precision on amps):
  //ina219.setCalibration_32V_1A();
  // Or to use a lower 16V, 400mA range (higher precision on volts and amps):
  //ina219.setCalibration_16V_400mA();

Serial.println("Measuring voltage and current with INA219 ...");
}

void loop(void) 
{
  float shuntvoltage = 0;
  float busvoltage = 0;
  float current_mA = 0;
  float loadvoltage = 0;
  float power_mW = 0;

shuntvoltage = ina219.getShuntVoltage_mV();
  busvoltage = ina219.getBusVoltage_V();
  current_mA = ina219.getCurrent_mA();
  power_mW = ina219.getPower_mW();
  loadvoltage = busvoltage + (shuntvoltage / 1000);
  
  Serial.print("Bus Voltage:   "); Serial.print(busvoltage); Serial.println(" V");
  Serial.print("Shunt Voltage: "); Serial.print(shuntvoltage); Serial.println(" mV");
  Serial.print("Load Voltage:  "); Serial.print(loadvoltage); Serial.println(" V");
  Serial.print("Current:       "); Serial.print(current_mA); Serial.println(" mA");
  Serial.print("Power:         "); Serial.print(power_mW); Serial.println(" mW");
  Serial.println("");

delay(2000);
}
```