信号塔#

信号塔命令只能与 CTE 信号塔一起使用。

初始化 SignalTower 类#

使用以下构造函数创建信号塔：

SignalTower(port)

此构造函数使用一个参数：

范围

描述

port

SignalTower 连接到的有效 智能端口。

 
# Construct a Signal Tower "signaltower_1" with the
# SignalTower class.
signaltower_1 = SignalTower(Ports.Port1)

This signaltower_1 object will be used in all subsequent examples throughout this API documentation when referring to SignalTower class methods.

类方法#

set_color()#

The set_color(color, state) method is used to set the Signal Tower’s color and state indefinitely, or until the method is used again.

范围

描述

颜色

有效的 SignalTowerColorType。

状态

有效的 SignalTowerColorType。

**返回：**无

# Set the Signal Tower to start blinking the blue LED.
signaltower_1.set_color(signal_tower.BLUE, signal_tower.BLINK)

set_colors()#

The set_colors(r, y, g, b, w) method turns all LEDs on the Signal Tower on or off.

范围

描述

r

有效的 SignalTowerColorType，用于将 LED 设置为红色。

y

有效的 SignalTowerColorType，用于将 LED 设置为黄色。

克

有效的 SignalTowerColorType，用于将 LED 设置为绿色。

b

有效的 SignalTowerColorType，用于将 LED 设置为蓝色。

西

有效的 SignalTowerColorType，用于设置白色 LED。

**返回：**无

# Turn on all LEDs.
signaltower_1.set_color(signal_tower.ON, signal_tower.ON, signal_tower.ON, signal_tower.ON, signal_tower.ON)

# Turn on just the red LED.
signaltower_1.set_color(signal_tower.ON, signal_tower.OFF, signal_tower.OFF, signal_tower.OFF, signal_tower.OFF)

pressing()#

The pressing() method returns whether the Signal Tower’s button is currently being pressed.

Returns: True if the Signal Tower’s button is currently being pressed. False if it is not.

pressed()#

The pressed(callback, arg) method registers a function to be called when the Signal Tower’s button is pressed.

范围

描述

打回来

按下按钮时调用的函数

arg

**可选。**用于向回调函数传递参数的元组

**返回：**事件类的一个实例。

# Define a function tower_button_pressed().
def tower_button_pressed():
    # Print that the Signal Tower's button was pressed to
    # the Brain's screen.
    brain.screen.print("button pressed")

# Run tower_button_pressed when the Signal Tower's button 
# is pressed.
signaltower_1.pressed(tower_button_pressed)

released()#

The released(callback, arg) method registers a function to be called when the Signal Tower’s button is released.

范围

描述

打回来

释放按钮时调用的函数

arg

**可选。**用于向回调函数传递参数的元组

返回： Event 类的一个实例

# Define a function tower_button_released().
def tower_button_released():
    # Print that the Signal Tower's button was released
    # to the Brain's screen.
    brain.screen.print("button released")

# Run tower_button_released when the Signal Tower's button
# is released.
signaltower_1.released(tower_button_released)

installed()#

The installed() method checks for device connection.

Returns: True if the device is connected. False if it is not.

timestamp()#

The timestamp() method returns the timestamp of the last received status packet from the Signal Tower.

**返回：**最后接收的状态包的时间戳（以毫秒为单位）。

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