Class: UChip::MCP2221::GPSettings

Inherits:
Object
  • Object
show all
Defined in:
lib/uchip/mcp2221.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(bytes) ⇒ GPSettings

Returns a new instance of GPSettings.



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# File 'lib/uchip/mcp2221.rb', line 125

def initialize bytes
  @bytes = bytes
end

Instance Attribute Details

#bytes ⇒ Object (readonly)

Returns the value of attribute bytes.



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# File 'lib/uchip/mcp2221.rb', line 123

def bytes
  @bytes
end

Instance Method Details

#decode(bytes) ⇒ Object 



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# File 'lib/uchip/mcp2221.rb', line 167

def decode bytes
  4.times.each_with_object({}) { |i, o|
    o[:"gp#{i}_output_value"] = output_value_at(i)
    o[:"gp#{i}_direction"]    = direction_at(i)
    o[:"gp#{i}_designation"]  = designation_at(i)
  }
end

#designation_at(i) ⇒ Object 



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# File 'lib/uchip/mcp2221.rb', line 151

def designation_at i
  (bytes[i] >> 0) & 0x3
end

#direction_at(i) ⇒ Object 



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# File 'lib/uchip/mcp2221.rb', line 142

def direction_at i
  (bytes[i] >> 3) & 0x1
end

#inspect ⇒ Object 



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# File 'lib/uchip/mcp2221.rb', line 129

def inspect
  to_s.sub(/>$/, " #{decode(@bytes).inspect}>")
end

#output_value_at(i) ⇒ Object 



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# File 'lib/uchip/mcp2221.rb', line 133

def output_value_at i
  (bytes[i] >> 4) & 0x1
end

#set_designation_at(i, v) ⇒ Object 



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# File 'lib/uchip/mcp2221.rb', line 155

def set_designation_at i, v
  bytes[i] &= ~(0x3 << 0)
  bytes[i] |= (0x3 & v) << 0
end

#set_direction_at(i, v) ⇒ Object 



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# File 'lib/uchip/mcp2221.rb', line 146

def set_direction_at i, v
  bytes[i] &= ~(1 << 3)
  bytes[i] |= (1 & v) << 3
end

#set_output_value_at(i, v) ⇒ Object 



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# File 'lib/uchip/mcp2221.rb', line 137

def set_output_value_at i, v
  bytes[i] &= ~(1 << 4)
  bytes[i] |= (1 & v) << 4
end