按钮

EXP Brain 的三个按钮可以访问三个对象：

• buttonCheck

• buttonLeft

• buttonRight

按下()

The pressed(callback) method registers a function to be called when a button is pressed.

参数	描述
callback	按下按钮时调用的函数。

**返回：**无。

// Create a new function buttonPressed().
void button_pressed() {
  Brain.Screen.print("button pressed");
}

int main() {
  // When the Brain's Left button is pressed, run the
  // button_pressed function.
  Brain.buttonLeft.pressed(buttonPressed);
}

发布()

The released(callback) method registers a function to be called when a button is released.

参数	描述
callback	释放按钮时调用的函数。

**返回：**无。

// Create a new function buttonReleased().
void button_pressed() {
  Brain.Screen.print("button released");
}

int main() {
  // When the Brain's Left button is released, run the
  // button_pressed function.
  Brain.buttonLeft.released(buttonReleased);
}

紧迫（）

The pressing() method returns whether a button is currently being pressed.

Returns: true if the button is being pressed. false if it is not.