Class: MockI2CDevice

Inherits:
Object
  • Object
show all
Defined in:
lib/i2c/mocki2cdevice.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ MockI2CDevice

Returns a new instance of MockI2CDevice.



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# File 'lib/i2c/mocki2cdevice.rb', line 8

def initialize
	@temp = Tempfile.new("i2c")
	@ioctl = []
	@memory = [ 0 ]
	@address = nil
	@state = nil
end

Instance Attribute Details

#ioctl(cmd, arg) ⇒ Object (readonly)

Returns the value of attribute ioctl.



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# File 'lib/i2c/mocki2cdevice.rb', line 5

def ioctl
  @ioctl
end

#memory ⇒ Object (readonly)

Returns the value of attribute memory.



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# File 'lib/i2c/mocki2cdevice.rb', line 4

def memory
  @memory
end

#state ⇒ Object (readonly)

Returns the value of attribute state.



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# File 'lib/i2c/mocki2cdevice.rb', line 6

def state
  @state
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/i2c/mocki2cdevice.rb', line 31

def close
	@address = nil
	@state = nil
	self
end

#open ⇒ Object 



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# File 'lib/i2c/mocki2cdevice.rb', line 25

def open
	@address = nil
	@state = :init
	self
end

#path ⇒ Object 



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# File 'lib/i2c/mocki2cdevice.rb', line 16

def path
	@temp.path
end

#sysread(size) ⇒ Object 



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# File 'lib/i2c/mocki2cdevice.rb', line 52

def sysread(size)
	ret = []
	case @state
	when :init
		raise "Invalid State"
	when :wait
		size.times do
			ret << @memory[@address]
			@address += 1
		end
	end
	ret.pack("C*")
end

#syswrite(buf) ⇒ Object 



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# File 'lib/i2c/mocki2cdevice.rb', line 37

def syswrite(buf)
	buf.unpack("C*").each do |c|
		case @state
		when :init
			# p "@address = 0x%02x" % c
			@address = c
			@state = :wait
		when :wait
			# p "@memory[0x%02x] = 0b%08b" % [@address, c]
			@memory[@address] = c
			@address += 1
		end
	end
end