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module Origen
module Models
class ScanRegister
include Origen::Model
attr_reader :size
def initialize(options = {})
# The shift register
reg :sr, 0, size: size, reset: options[:reset] || 0
# The update register, this is the value presented to the outside world
reg :ur, 0, size: size, reset: options[:reset] || 0
port :si # Scan in
port :so # Scan out
port :c, size: size # Capture in
# Control signals
port :se # Shift enable
port :ce # Capture enable
port :ue # Update enable
so.connect_to(sr[0])
end
def method_missing(method, *args, &block)
if BitCollection.instance_methods.include?(method)
ur.send(method, *args, &block)
else
super
end
end
def respond_to?(*args)
super(*args) || BitCollection.instance_methods.include?(args.first)
end
def mode
if se.data == 1
:shift
elsif ce.data == 1
:capture
elsif ue.data == 1
:update
else
undefined
end
end
def clock_prepare
@mode = mode
if @mode == :shift
@din = si.data
elsif @mode == :capture
@din = c.data
elsif @mode == :update
@din = sr.data
end
end
def clock_apply
if @mode == :shift
sr.shift_right(@din)
elsif @mode == :capture
sr.write(@din)
elsif @mode == :update
ur.write(@din)
end
@din = nil
@mode = nil
end
end
end
end
Version data entries
175 entries across 175 versions & 1 rubygems