脉宽调制输出#

初始化 pwm_out 类 #

使用以下构造函数创建 PWM 输出：

The pwm_out constructor creates a pwm_out object in the specified Three Wire Port:

范围	描述
`port`	The 3-Wire Port to use for the Pwm Output, whether it’s a port on the `Brain`, or a `3-Wire Expander`.

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

// Create the Brain.
brain Brain;
// Construct a Pwm Output "pwm" with the Pwm class.
pwm_out pwm = pwm_out(Brain.ThreeWirePort.A);

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

The state(value, units) command sets the state of the PWM.

参数	描述
`value`	为 PWM 输出设置的新值，从 -100% 到 +100%。
`units`	The only valid unit for pwm output is `percent`.

**返回：**无。

// Set the PWM Output to 50%.
  pwm.state(50, percent);