Class: Tamashii::Agent::Device::Keyboard::TTP229Serial

Inherits:
Base
  • Object
show all
Defined in:
lib/tamashii/agent/device/keyboard/ttp229_serial.rb

Constant Summary collapse

HALF_BIT_TIME = 
0.001

Instance Method Summary collapse

Methods inherited from Base

#add_callback, #default_watch, #initialize, #initialize_watcher, #mark_key_down, #mark_key_up, #number_of_keys, #on_key_down, #on_key_pressed, #on_key_up, #poll_key, #process_callbacks, #record_key_state, #shutdown, #start_watcher_thread, #stop_watcher_thread, #watcher_loop, #watcher_stopping?

Methods inherited from DeviceBase

#fetch_option, #fetch_option!, #initialize, #shutdown, #unexport_pin

Methods included from Common::Loggable

#display_name, #logger, #progname

Constructor Details

This class inherits a constructor from Tamashii::Agent::Device::Keyboard::Base

Instance Method Details

#default_number_of_keys ⇒ Object 



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# File 'lib/tamashii/agent/device/keyboard/ttp229_serial.rb', line 23

def default_number_of_keys
  8
end

#default_scl_pin ⇒ Object 



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# File 'lib/tamashii/agent/device/keyboard/ttp229_serial.rb', line 27

def default_scl_pin
  17
end

#default_sdo_pin ⇒ Object 



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# File 'lib/tamashii/agent/device/keyboard/ttp229_serial.rb', line 31

def default_sdo_pin
  4
end

#finalize_hardware ⇒ Object 



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# File 'lib/tamashii/agent/device/keyboard/ttp229_serial.rb', line 35

def finalize_hardware
  unexport_pin(@scl_pin.pin)
  unexport_pin(@sdo_pin.pin)
end

#initialize_hardware ⇒ Object 



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# File 'lib/tamashii/agent/device/keyboard/ttp229_serial.rb', line 12

def initialize_hardware
  @scl_pin = PiPiper::Pin.new(pin: fetch_option(:scl_pin, default_scl_pin), direction: :out)
  @sdo_pin = PiPiper::Pin.new(pin: fetch_option(:sdo_pin, default_sdo_pin), direction: :in)
  @scl_pin.on
  sleep(HALF_BIT_TIME)
end

#polling_interval ⇒ Object 



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# File 'lib/tamashii/agent/device/keyboard/ttp229_serial.rb', line 19

def polling_interval
  10*HALF_BIT_TIME
end

#read_key ⇒ Object 



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# File 'lib/tamashii/agent/device/keyboard/ttp229_serial.rb', line 40

def read_key
  current_key = nil
  @number_of_keys.times do |key|
    @scl_pin.off
    sleep(HALF_BIT_TIME)
    @sdo_pin.read
    if @sdo_pin.off?
      current_key = key
      mark_key_down(key)
    else
      mark_key_up(key)
    end
    @scl_pin.on
    sleep(HALF_BIT_TIME)
  end
  current_key
end