Class: Pigpio::BitBangSerialTx

Inherits:
Object
  • Object
show all
Defined in:
lib/pigpio/bit_bang_serial_tx.rb

Direct Known Subclasses

BitBangSerial

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(tx, baud = 9600, data_bits = 8, stop_bits = 1) ⇒ BitBangSerialTx

Returns a new instance of BitBangSerialTx.



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# File 'lib/pigpio/bit_bang_serial_tx.rb', line 4

def initialize(tx, baud = 9600, data_bits = 8, stop_bits = 1)
  @tx = tx
  @baud = baud
  @data_bits = data_bits
  @stop_half_bits = (stop_bits * 2).round.to_i
end

Instance Attribute Details

#tx ⇒ Object (readonly)

Returns the value of attribute tx.



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# File 'lib/pigpio/bit_bang_serial_tx.rb', line 3

def tx
  @tx
end

Instance Method Details

#busy? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pigpio/bit_bang_serial_tx.rb', line 39

def busy?
  IF.wave_tx_busy(@tx.pi)
end

#close ⇒ Object 



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# File 'lib/pigpio/bit_bang_serial_tx.rb', line 11

def close
  IF.wave_tx_stop(@tx.pi) if busy?
  IF.wave_clear(@tx.pi)
end

#stop ⇒ Object 



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# File 'lib/pigpio/bit_bang_serial_tx.rb', line 43

def stop
  IF.wave_tx_stop(@tx.pi)
end

#sync ⇒ Object 



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# File 'lib/pigpio/bit_bang_serial_tx.rb', line 26

def sync
  while busy?
    sleep 0.1
  end
end

#write(buf) ⇒ Object 



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# File 'lib/pigpio/bit_bang_serial_tx.rb', line 16

def write(buf)
  IF.wave_clear(@tx.pi)
  IF.wave_add_new(@tx.pi)
  ret = IF.wave_add_serial(@tx.pi, @tx.gpio, @baud, @data_bits, @stop_half_bits, 0, buf)
  return ret if ret < 0
  wid = IF.wave_create(@tx.pi)
  return wid if wid < 0
  IF.wave_send_once(@tx.pi, wid)
end

#write_sync(buf) ⇒ Object 



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# File 'lib/pigpio/bit_bang_serial_tx.rb', line 32

def write_sync(buf)
  ret = write(buf)
  return ret if ret < 0
  sync
  IF.wave_clear(@tx.pi)
end