Class: HDLRuby::High::SignalI

Inherits:
Low::SignalI show all
Includes:
HRef
Defined in:
lib/HDLRuby/hruby_high.rb

Overview

Describes a high-level signal.

Constant Summary collapse

High = 
HDLRuby::High
DIRS =

The valid bounding directions.

[ :no, :input, :output, :inout, :inner ]

Constants included from Low::Low2Symbol

Low::Low2Symbol::Low2SymbolPrefix, Low::Low2Symbol::Low2SymbolTable, Low::Low2Symbol::Symbol2LowTable

Instance Attribute Summary collapse

Attributes inherited from Low::SignalI

#name, #type, #value

Attributes included from Low::Hparent

#parent

Instance Method Summary collapse

Methods included from HRef

#each, included, #to_event

Methods inherited from Low::SignalI

#clone, #eql?, #explicit_types!, #hash, #replace_names!, #set_name!, #set_type!, #set_value!, #to_c, #to_c_signal, #to_ch, #to_high, #to_verilog, #to_vhdl, #width

Methods included from Low::Low2Symbol

#to_sym

Methods included from Low::Hparent

#scope

Constructor Details

#initialize(name, type, dir, value = nil) ⇒ SignalI

Creates a new signal named +name+ typed as +type+ with +dir+ as bounding direction and possible +value+.

NOTE: +dir+ can be :input, :output, :inout or :inner



3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
 
# File 'lib/HDLRuby/hruby_high.rb', line 3079

def initialize(name,type,dir,value =  nil)
    # Check the value.
    value = value.to_expr if value
    # Initialize the type structure.
    super(name,type,value)

    unless name.empty? then
        # Named signal, set the hdl-like access to the signal.
        obj = self # For using the right self within the proc
        High.space_reg(name) { obj }
    end

    # Hierarchical type allows access to sub references, so generate
    # the corresponding methods.
    if type.struct? then
        type.each_name do |name|
            self.define_singleton_method(name) do
                RefObject.new(self.to_ref,
                            SignalI.new(name,type.get_type(name),dir))
            end
        end
    end

    # Check and set the bound.
    self.dir = dir

    # Set the read and write authorisations.
    @can_read = 1.to_expr
    @can_write = 1.to_expr
end

Instance Attribute Details

#can_read ⇒ Object

Tells if the signal can be read.



3070
3071
3072
 
# File 'lib/HDLRuby/hruby_high.rb', line 3070

def can_read
  @can_read
end

#can_write ⇒ Object

Tells if the signal can be written.



3073
3074
3075
 
# File 'lib/HDLRuby/hruby_high.rb', line 3073

def can_write
  @can_write
end

#dir ⇒ Object

The bounding direction.



3067
3068
3069
 
# File 'lib/HDLRuby/hruby_high.rb', line 3067

def dir
  @dir
end

Instance Method Details

#coerce(obj) ⇒ Object

Coerce by converting signal to an expression.



3154
3155
3156
 
# File 'lib/HDLRuby/hruby_high.rb', line 3154

def coerce(obj)
    return [obj,self.to_expr]
end

#edge ⇒ Object

Creates an edge event from the signal.



3139
3140
3141
 
# File 'lib/HDLRuby/hruby_high.rb', line 3139

def edge
    return Event.new(:edge,self.to_ref)
end

#negedge ⇒ Object

Creates a negative edge event from the signal.



3134
3135
3136
 
# File 'lib/HDLRuby/hruby_high.rb', line 3134

def negedge
    return Event.new(:negedge,self.to_ref)
end

#posedge ⇒ Object

Creates a positive edge event from the signal.



3129
3130
3131
 
# File 'lib/HDLRuby/hruby_high.rb', line 3129

def posedge
    return Event.new(:posedge,self.to_ref)
end

#to_expr ⇒ Object

Converts to a new expression.



3149
3150
3151
 
# File 'lib/HDLRuby/hruby_high.rb', line 3149

def to_expr
    return self.to_ref
end

#to_low(name = self.name) ⇒ Object

Converts the system to HDLRuby::Low and set its +name+.



3159
3160
3161
 
# File 'lib/HDLRuby/hruby_high.rb', line 3159

def to_low(name = self.name)
    return HDLRuby::Low::SignalI.new(name,self.type.to_low)
end

#to_ref ⇒ Object

Converts to a new reference.



3144
3145
3146
 
# File 'lib/HDLRuby/hruby_high.rb', line 3144

def to_ref
    return RefObject.new(this,self)
end