index :: hw

hw.rpi.i2c.pca9685

драйвер для 16-канального 12-битного ШИМ модуля на чипе PCA9685 для Raspberry Pi

доступно с версии: 0.9.8

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информация

Note: default PWM freq is 50Hz Servo Control Many digital servos run on a 20ms pulse width (50Hz update frequency) based duty cycle, and do not utilize the entire pulse width for their control Typically, 2.5% of the 20ms pulse width (0.5ms) represents -90° offset, and 12.5% of the 20ms pulse width (2.5ms) represents +90° offset Be aware that driving some 180° servos too far past their -90°/+90° operational range can cause a little plastic limiter pin to break off and get stuck inside of the servo's gearing, which could potentially cause the servo to become jammed and no longer function Continuous servos operate in much the same fashion as 180° servos, but instead of the 2.5%/12.5% pulse width controlling a -90°/+90° offset it controls a -1x/+1x speed multiplier, with 0x being parked/no-movement and -1x/+1x being maximum speed in either direction.

аргументы:

• I2C_BUS See @i2c_bus property
  тип: atom
  

методы:

• const set channel constant value
  параметры:

  • CHAN device PWM channel. If equals to 16 means all channels
    тип: int
    обязательно: True
    

  • VALUE value
    тип: bool
    обязательно: True
    

  • [DELAY] the setting is delayed by the given phase value.
    тип: float
    

• disable_prog_addr disable of using programmable address
  параметры:
  • TYPE prog address type
    тип: atom
    обязательно: True
    
• duty set channel PWM duty cycle
  параметры:

  • CHAN device PWM channel. If equals to 16 means all channels
    тип: int
    обязательно: True
    

  • DUTY duty cycle value
    тип: float
    обязательно: True
    

  • [PHASE] phase offset
    тип: float
    

• enable enable/disable the device. The disabled state is equal to sleep, the device is keeping all current PWM setting, but just not responds to the new settings.
  параметры:
  • [STATE=1] new state
    тип: bool
    

• enable_restart_and_disable put the controller to sleep while keeping the PWM register contents in preparation for a future restart
  

• freq set PWM frequency
  параметры:
  • FREQ new frequency
    тип: float
    единица: Hz
    обязательно: True
    
• period set PWM period
  параметры:
  • PERIOD new frequency
    тип: float
    единица: ms
    обязательно: True
    
• polarity set PWM inversed polarity. Applicable when OE = 0.
  параметры:
  • POLARITY polarity value: 0 - direct, 1 - inversed
    тип: bool
    обязательно: True
    
• pwidth set channel PWM pulse width
  параметры:

  • CHAN device PWM channel. If equals to 16 means all channels
    тип: int
    обязательно: True
    

  • WIDTH pulse width
    тип: float
    единица: ms
    обязательно: True
    

  • [PHASE] phase offset
    тип: float
    

• restart re-enable the controller after a sleep with restart enabled so that previously active PWM channels are restarted
  

• set_raw set channel raw PWM frequency
  параметры:

  • CHAN device PWM channel. If equals to 16 means all channels
    тип: int
    обязательно: True
    

  • ON ON counter time value
    тип: int
    обязательно: True
    

  • OFF OFF counter time value
    тип: int
    обязательно: True
    

• use_prog_addr set and use programmable address
  параметры:

  • TYPE prog address type
    тип: atom
    обязательно: True
    

  • I2C_ADDR new I²C address
    тип: int
    обязательно: True
    

свойства:

• @i2c_addr (initonly) Запросить/установить I²C address. Also 'default' value is accepted (for addr 0x40)
  тип: int
  диапазон: -4..119
  по умолчанию: -1
  

• @i2c_bus (initonly) Запросить/установить I²C bus
  тип: atom
  варианты: 1, 2, 3, 4, 5, 6, default, none
  по умолчанию: none
  

входы:

• control input
  тип: control

выходы:

• control output
  тип: control

ключевые слова:

display pwm raspberry servo

Авторы: Serge Poltavsky

Лицензия: GPL3 or later