加速度计#

初始化加速度计类#

使用以下构造函数之一可以创建加速度计：

The accelerometer constructor creates an Accelerometer in a specified Three Wire Port with High Sensitivity Mode defaulted to false.

范围

描述

port

The 3-Wire Port that the Accelerometer is connected to, whether it’s a port on the Brain, or a 3-Wire Expander.

 
// Create the Brain.
brain Brain;

// Construct an accelerometer "accel" with the
// accelerometer class.
accelerometer accel = accelerometer(Brain.ThreeWirePort.A);

The Accelerometer(port, sensitivity) constructor creates an Accelerometer and can enable High Sensitivity Mode.

范围

描述

port

The 3-Wire Port that the Accelerometer is connected to, whether it’s a port on the Brain, or a 3-Wire Expander.

sensitivity

Enables high sensitivity mode (+/- 2g) on the Accelerometer. true to enable high sensitivity. The default sensitivity is (+/- 6g).

 
// Create the Brain.
brain Brain;

// Construct an accelerometer "accel" with the
// accelerometer class.
accelerometer accel = accelerometer(Brain.ThreeWirePort.A, true);

A Brain or 3-Wire Expander must be created first before they can be used to create an object with the Accelerometer Class constructor.

The accel object will be used in all subsequent examples throughout this API documentation when referring to accelerometer class methods.

为了获得最佳功能，建议为每个轴使用单独的加速度计，并单独初始化它们：

accelerometer accel_x = accelerometer(Brain.ThreeWirePort.A);
accelerometer accel_y = accelerometer(Brain.ThreeWirePort.B);
accelerometer accel_z = accelerometer(Brain.ThreeWirePort.C);

类方法#

acceleration()#

The acceleration() method reads the value of the Accelerometer scaled to units of gravity.

返回： 范围内的双精度数 +/- 6G，或如果设置了高灵敏度模式则为 +/-2G。

// Drive the robot forward.
Drivetrain.drive(forward);

// Get the acceleration of accel in the range +/- 6G.
double accelerationValue = accel.acceleration();

changed()#

The changed(callback) method registers a function to be called when the value of the Accelerometer changes.

参数

描述

callback

当加速度计的轴值改变时调用的函数。

**返回：**事件类的一个实例。

// Define the accelerometerChanged function with a void
// return type, showing it doesn't return a value.
void accelerometerChanged() {
  // The Brain will print that the Accelerometer changed on
  // the Brain's screen.
  Brain.Screen.print("accelerometer changed");
}

int main() {
  // Initializing Robot Configuration. DO NOT REMOVE!
  vexcodeInit();

  // Drive the robot forward.
  Drivetrain.drive(forward);

  // Run accelerometerChanged when the value of the 
  // Accelerometer changes.
  accel.changed(accelerometerChanged);
}
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