Module: Origen::Pins

Defined in:
lib/origen/pins.rb,
lib/origen/pins/pin.rb,
lib/origen/pins/pin_bank.rb,
lib/origen/pins/pin_clock.rb,
lib/origen/pins/power_pin.rb,
lib/origen/pins/ground_pin.rb,
lib/origen/pins/pin_common.rb,
lib/origen/pins/function_proxy.rb,
lib/origen/pins/pin_collection.rb

Overview

****** These notes refer to the pin model for the upcoming Origen V3 ******

Pin muxing and grouping on modern SoCs can be incredibly complex, Origen provides the following pin model architecture which should hopefully be sufficient to accurately model even the most complex of cases…

At the lowest layer are the pin objects, one per physical pin on a DUT. Each pin can store 1-bit of data with directional/state information for pattern generation, and additional metadata about the function of that pin in different modes of operation.

pin1                        pin2                        pin3                        pin4

Package

Packages are the first layer of filtering that can be applied to pins, each pin has a package hash which contains information about which packages it is available in and any additional metadata associated with the pin when in that package - for example what package pin location it is.

pin1                        pin2                        pin3                        pin4
  packages:                   packages:                   packages:                   packages:
    p1:                         p1:                         p1:
      location: "A5"              location: "B2"              location: "B3"
    p2:                                                     p2:
      location: "A5"                                          location: "B2"

Based on the above metadata these pins will work as follows within an SoC model:

$dut.package                     # => :none
$dut.pins.size                   # => 4

$dut.with_package :p1 do
  $dut.pins.size                 # => 3     (No pin4)
  $dut.pin(:pin1).location       # => "A5"
  $dut.has_pin?(:pin2)           # => true
  $dut.pin(:pin2).location       # => "B2"
  $dut.pin(:pin3).location       # => "B3"
end

$dut.with_package :p2 do
  $dut.pins.size                 # => 2     (No pin2 or pin4)
  $dut.pin(:pin1).location       # => "A5"
  $dut.has_pin?(:pin2)           # => false
  $dut.pin(:pin2).location       # => ERROR! The soc does not have pin 2 in the current configuration!
  $dut.pin(:pin3).location       # => "B2"
end

Aside from a physical package the packages attribute can also be used to model pseudo-packages like the subset of pins that are available in a probe or burn-in setup for example.

Pins availability can also be scoped by SoC mode and configuration…

Mode

The SoC mode attribute is inteded to be used to model top-level operating modes, such as functional test, RAMBIST, NVMBIST, etc. As such it is a top-level attribute similar to package attribute e.g. the SoC can be in RAMBIST mode within package P1, or it could be in User mode within package P2.

Configuration

The configuration scope should be used to model pin muxing that can occur independently of the SoC mode, for example in a functional test mode many different pin configurations may exist based on the IP modules that are enabled or disabled at runtime. Unlike the mode the configuration attribute can also be set at pin level as well. Any configuration attribute set on a pin will override the configuration attribute that is currently live on the SoC. This allows individual pins, or perhaps more commonly individual pin groups, to be set to a particular configuration independently of the other pins or the SoC.

The mode and configuration attributes at pin level are similar to those for the package, each pin also has a current_configuration attribute which will override the current_configuration attribute of the SoC when present. Each mode and configuration entry will be hash for storing meta data as required.

pin1                        pin2                        pin3                        pin4
  modes:                      modes:                      modes:                      modes:
    user:                       user:                       user:
    nvmbist:                    nvmbist:
  configurations:             configurations:             configurations:             configurations:
    default:                    default:                    default:                    default:
    alt0:                       alt1:                       alt0:
                                                            alt1:

Pin availability will be scoped accordingly when the mode and configuration of the SoC model is changed.

Although not shown in this example all of these filters are AND’d together, so a pin is only available if it is available in the current package, mode and configuration.

$dut.mode                        # => :none
$dut.configuration               # => :none

$dut.pins.size                   # => 4
$dut.mode = :user
$dut.pins.size                   # => 3   (No pin4)

$dut.configuration = :alt0
$dut.pins.size                   # => 2   (No pin2 or pin4)
# Set the configuration of pin2 directly, the all_pins method will bypass the current scope
# when looking up a pin
$dut.all_pins(:pin2).configuration = :alt1
$dut.pins.size                   # => 3   (pin2 is now available to)

While not shown here an additional value of :all can be set when specifying the mode/configuration attributes of a given pin and which means that it will be available in all modes and/or configurations.

Functions

Each pin can have multiple functions associated with it which is intended to reflect the current signal that is mux’d onto it. Functions are scoped by mode and configuration (not package) and only one function can exist per mode/configuration combo.

Again the reserved mode/configuration name :all can be used here to reflect a function that will be common to all modes/configurations unless a more specific function has been declared. The top-level key of the functions hash is the mode, then the configuration and then the meta data associated with that selection:

pin1                        pin2                        pin3                        pin4
  functions:                  functions:                  functions:                  functions:
    user:                       user:                       user:
      all:                        default:                    default:
        name: "TDI"                  name: "PORTA0"              name: "PORTA1"
        direction: :input            direction: :io              direction: :io
                                  alt1:                       alt0:
                                     name: "SPI0"                name: "IIC0"
                                     direction: :io              direction: :output
                                                              alt1:
                                                                 name: "SPI1"
                                                                 direction: :io
    nvmbist:                    nvmbist:
      all:                        all:
        name: "NVM_FAIL"            name: "NVM_DONE"
        direction: :output          direction: :output

The function attributes returned will automatically scope to the current SoC state:

$dut.mode = :user
$dut.pin(:pin1).name             # => "TDI"
$dut.pin(:pin1).direction        # => :input

$dut.mode = :nvmbist
$dut.pin(:pin1).name             # => "NVM_FAIL"
$dut.pin(:pin1).direction        # => :output

Aliases

Aliases are alternative names/handles to give to pins when using them to create patterns and other IP in Origen. Aliases can be made universal in which case they will work regardless of scope, or they can be scoped to the current package, mode and configuration.

The Origen pin API will automatically create scoped aliases for functions and package locations as they are declared, so for example:

$dut.mode = :user
$dut.pin(:pin1).name             # => "TDI"
$dut.pin(:tdi).name              # => "TDI"
$dut.has_pin?(:nvm_fail)         # => false
$dut.pin(:nvm_fail).name         # => ERROR! No pin called NVM_FAIL in the current scope!

$dut.mode = :nvmbist
$dut.pin(:pin1).name             # => "NVM_FAIL"
$dut.has_pin?(:nvm_fail)         # => true
$dut.pin(:nvm_fail).name         # => "NVM_FAIL"

*Pin Groups*

Pin groups will be similar to aliases in that they can be made universal or scoped to a specific package/mode/ configuration.

While aliases are simply pointers to pin objects pin groups will themselves be an Origen object which will be like a Ruby array with additional metadata attached (such as a name) and a dedicated API for working with the pins. Generally a pin and pingroup will respond to the same API so that calling code does not need to worry very much about dealing with a single pin vs. a collection.

Defined Under Namespace

Modules: PinCommon Classes: FunctionProxy, GroundPin, Pin, PinBank, PinClock, PinCollection, PowerPin

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.clear_pin_aliases ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API v2, deprecated



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# File 'lib/origen/pins.rb', line 183

def self.clear_pin_aliases
  @@pin_aliases = {}
end

.pin_aliases ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Aliases are stored in a global array that is cleared out everytime the target is loaded, while a bit hacky this is an easy way to allow sub modules to defined con

API v2, deprecated



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# File 'lib/origen/pins.rb', line 193

def self.pin_aliases
  @@pin_aliases ||= {}
end

Instance Method Details

#add_ground_pin(id = nil, options = {}, &block) ⇒ Object Also known as: add_ground_pins 



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# File 'lib/origen/pins.rb', line 269

def add_ground_pin(id = nil, options = {}, &block)
  id, options = nil, id if id.is_a?(Hash)
  options = {
    ground_pin: true
  }.merge(options)
  add_pin(id, options, &block)
end

#add_ground_pin_group(id, *pins, &block) ⇒ Object 



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# File 'lib/origen/pins.rb', line 448

def add_ground_pin_group(id, *pins, &block)
  if pins.last.is_a?(Hash)
    options = pins.pop
  else
    options = {}
  end
  options = {
    ground_pin: true
  }.merge(options)
  add_pin_group(id, *pins, options, &block)
end

#add_pin(id = nil, options = {}, &_block) ⇒ Object Also known as: add_pins

Use this method to add any pins that are considered owned by the given object. Pins declared via this method will be accessible within the object via pin(:pinname) or if you prefer self.pin(:pinname). Externally you would refer to it via $top.pin(:pinname) or $soc.pin(:pinname) or even $top.sub_module.pin(:pinname) depending on where you called this method. Pins are output in the pattern in the order that they are declared. A minimum declaration is this:

add_pin  :d_out        # A single pin that will be set to :dont_care by default

To set the initial state at the same time:

add_pin  :d_in,   :reset => :drive_hi
add_pin  :invoke, :reset => :drive_lo

You can override the name that appears in the pattern by providing a string as the last argument

add_pin  :done,   :reset => :expect_hi, :name => "bist_done"
add_pin  :fail,                         :name => "bist_fail"



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# File 'lib/origen/pins.rb', line 212

def add_pin(id = nil, options = {}, &_block)
  id, options = nil, id if id.is_a?(Hash)
  power_pin = options.delete(:power_pin)
  ground_pin = options.delete(:ground_pin)
  if options[:size] && options[:size] > 1
    group = PinCollection.new(self, options.merge(placeholder: true))
    group.id = id if id
    options = {
      name: ''
    }.merge(options)

    options.delete(:size).times do |i|
      options[:name] = "#{id}#{i}".to_sym

      if power_pin
        group[i] = PowerPin.new(i, self, options)
      elsif ground_pin
        group[i] = GroundPin.new(i, self, options)
      else
        group[i] = Pin.new(i, self, options)
      end
      group[i].invalidate_group_cache
    end
    yield group if block_given?
    group.each do |pin|
      pin.id = "#{group.id}#{pin.id}".to_sym
      pin.finalize
    end
    if group.size == 1
      Origen.pin_bank.add_pin(group.first, self, options)
    else
      Origen.pin_bank.add_pin_group(group, self, options)
    end
  else
    if power_pin
      pin = PowerPin.new(id || :temp, self, options)
    elsif ground_pin
      pin = GroundPin.new(id || :temp, self, options)
    else
      pin = Pin.new(id || :temp, self, options)
    end
    yield pin if block_given?
    pin.finalize
    Origen.pin_bank.add_pin(pin, self, options)
  end
end

#add_pin_alias(new_name, original_name, options = {}) ⇒ Object Also known as: pin_alias, alias_pin 



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# File 'lib/origen/pins.rb', line 315

def add_pin_alias(new_name, original_name, options = {})
  if pin_groups.include?(original_name) # this is a pin group
    if options[:pin] # alias single pin from a pin group
      pin(original_name)[options[:pin]].add_alias(new_name, options)
    else # alias subset of pins from a pin group
      add_pin_group_alias(new_name, original_name, options)
    end
  else # this is a pin
    pin(original_name).add_alias(new_name, options)
  end
end

#add_pin_group(id, *pins, &_block) ⇒ Object 



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# File 'lib/origen/pins.rb', line 387

def add_pin_group(id, *pins, &_block)
  if pins.last.is_a?(Hash)
    options = pins.pop
  else
    options = {}
  end
  # check if this is a pin group alias

  found = false
  group = nil
  unless options[:pins_only] == true
    pins.each do |i|
      if pin_groups.include?(i)
        group = add_pin_group_alias(id, i, options)
        found = true
      end
    end
  end
  unless found # not a pin group alias
    group = Origen.pin_bank.find_or_create_pin_group(id, self, options)
    if block_given?
      yield group
    else
      # SMcG:
      #
      # Not 100% sure that this is right, but the idea here is that when manually defining a pin
      # group the user will naturally think in endian order. e.g. when defining a big endian group
      # they would do:
      #
      #   add_pin_group :pa, :pa7, :pa5, :pa1, :pa0
      #
      # But if it was little endian they would probably do:
      #
      #   add_pin_group :pa, :pa0, :pa1, :pa5, :pa7, :endian => :little
      #
      # However I never work on little endian ports so I don't know for sure!
      #
      # In both cases though we always want pins(:pa)[0] to return :pa0.
      if options[:endian] == :little
        pins.each { |pin| group.add_pin(pin, options) }
      else
        pins.reverse_each { |pin| group.add_pin(pin, options) }
      end
    end
  end
  group
  # Origen.pin_bank.add_pin_group(group, self, {:pins_exist => true}.merge(options))
end

#add_pin_group_alias(new_name, original_name, options = {}) ⇒ Object 



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# File 'lib/origen/pins.rb', line 329

def add_pin_group_alias(new_name, original_name, options = {})
  group = Origen.pin_bank.find_or_create_pin_group(new_name, self, options)
  if options[:pins] # alias to range of pins from a pin group
    options[:pins].each do |mypin|
      pin(new_name).add_pin(pin(original_name)[mypin])
    end
  else
    pin(original_name).each_with_index { |_pin, i| pin(new_name).add_pin(pin(original_name)[i]) }
  end
  group
end

#add_power_pin(id = nil, options = {}, &block) ⇒ Object Also known as: add_power_pins 



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# File 'lib/origen/pins.rb', line 260

def add_power_pin(id = nil, options = {}, &block)
  id, options = nil, id if id.is_a?(Hash)
  options = {
    power_pin: true
  }.merge(options)
  add_pin(id, options, &block)
end

#add_power_pin_group(id, *pins, &block) ⇒ Object 



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# File 'lib/origen/pins.rb', line 436

def add_power_pin_group(id, *pins, &block)
  if pins.last.is_a?(Hash)
    options = pins.pop
  else
    options = {}
  end
  options = {
    power_pin: true
  }.merge(options)
  add_pin_group(id, *pins, options, &block)
end

#all_ground_pins(id = nil, _options = {}, &_block) ⇒ Object

Equivalent to the all_pins method but considers ground pins rather than regular pins



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# File 'lib/origen/pins.rb', line 483

def all_ground_pins(id = nil, _options = {}, &_block)
  if id
    pin = Origen.pin_bank.find(id, ignore_context: true, ground_pin: true)
  else
    Origen.pin_bank.all_ground_pins
  end
end

#all_pins(id = nil, _options = {}, &_block) ⇒ Object

Similar to the pins method except that this method will bypass the package/mode/configuration scope.

Therefore with no id supplied it will return all known pins and with an id it will return the given pin object regardless of where or not it is enabled by the current context



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# File 'lib/origen/pins.rb', line 465

def all_pins(id = nil, _options = {}, &_block)
  if id
    pin = Origen.pin_bank.find(id, ignore_context: true)
  else
    Origen.pin_bank.all_pins
  end
end

#all_power_pins(id = nil, _options = {}, &_block) ⇒ Object

Equivalent to the all_pins method but considers power pins rather than regular pins



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# File 'lib/origen/pins.rb', line 474

def all_power_pins(id = nil, _options = {}, &_block)
  if id
    pin = Origen.pin_bank.find(id, ignore_context: true, power_pin: true)
  else
    Origen.pin_bank.all_power_pins
  end
end

#delete_all_pins ⇒ Object 



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# File 'lib/origen/pins.rb', line 607

def delete_all_pins
  Origen.pin_bank.send :empty!
end

#delete_pin(id, options = {}) ⇒ Object

Delete any pin or pin group. If arg is a pin then delete the pin and any instances of it in any pin groups



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# File 'lib/origen/pins.rb', line 613

def delete_pin(id, options = {})
  id = id.to_sym
  # Check if this is a Pin or a PinGroup
  if pin_groups.key? id
    Origen.pin_bank.delete_pingroup(Origen.pin_bank.find_pin_group(id, options))
  elsif pins(id).class.to_s.match(/Pin/)
    Origen.pin_bank.delete_pin(Origen.pin_bank.find(id, options))
  else
    fail "Error: the object #{id} you tried to delete is not a pin or pingroup"
  end
end

#ground_pin_groups(id = nil, options = {}, &_block) ⇒ Object Also known as: ground_pin_group

Equivalent to the pin_groups method but considers ground pins rather than regular pins



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# File 'lib/origen/pins.rb', line 535

def ground_pin_groups(id = nil, options = {}, &_block)
  id, options = nil, id if id.is_a?(Hash)
  if id
    pin = Origen.pin_bank.find(id, options.merge(ground_pin: true))
    unless pin
      puts "You have tried to reference ground_pin_group :\#{id} within \#{self.class} but it does not exist, this could be\nbecause the pin group has not been defined yet or it is an alias that is not available in the current context.\n\nIf you meant to define the ground_pin_group then use the add_ground_pin_group method instead.\n\n      END\n      fail 'Power pin group not found'\n    end\n    pin\n  else\n    Origen.pin_bank.ground_pin_groups(options)\n  end\nend\n"

#ground_pins(id = nil, options = {}, &block) ⇒ Object

Equivalent to the pins method but considers ground pins rather than regular pins



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# File 'lib/origen/pins.rb', line 599

def ground_pins(id = nil, options = {}, &block)
  id, options = nil, id if id.is_a?(Hash)
  options = {
    ground_pin: true
  }.merge(options)
  pins(id, options, &block)
end

#has_ground_pin?(id) ⇒ Boolean Also known as: has_ground_pins?

Equivalent to the has_pin? method but considers ground pins rather than regular pins

Returns:

  • (Boolean) 


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# File 'lib/origen/pins.rb', line 382

def has_ground_pin?(id)
  !!Origen.pin_bank.find(id, ground_pin: true)
end

#has_pin?(id) ⇒ Boolean Also known as: has_pins?

Returns true if the module has access to a pin with the given name within the current context

Returns:

  • (Boolean) 


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# File 'lib/origen/pins.rb', line 370

def has_pin?(id)
  !!Origen.pin_bank.find(id)
end

#has_power_pin?(id) ⇒ Boolean Also known as: has_power_pins?

Equivalent to the has_pin? method but considers power pins rather than regular pins

Returns:

  • (Boolean) 


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# File 'lib/origen/pins.rb', line 376

def has_power_pin?(id)
  !!Origen.pin_bank.find(id, power_pin: true)
end

#pin_aliases ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API v2, deprecated



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# File 'lib/origen/pins.rb', line 344

def pin_aliases
  # Clear this out every time the target changes
  if !(defined? @@pin_aliases_target) ||
     (@@pin_aliases_target != Origen.target.signature)
    Origen::Pins.clear_pin_aliases
    @@pin_aliases_target = Origen.target.signature
  end
  Origen::Pins.pin_aliases
end

#pin_groups(id = nil, options = {}, &_block) ⇒ Object Also known as: pin_group 



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# File 'lib/origen/pins.rb', line 491

def pin_groups(id = nil, options = {}, &_block)
  id, options = nil, id if id.is_a?(Hash)
  if id
    pin = Origen.pin_bank.find(id, options)
    unless pin
      puts "You have tried to reference pin_group :\#{id} within \#{self.class} but it does not exist, this could be\nbecause the pin has not been defined yet or it is an alias that is not available in the current context.\n\nIf you meant to define the pin_group then use the add_pin_group method instead.\n\n      END\n      fail 'Pin not found'\n    end\n    pin\n  else\n    Origen.pin_bank.pin_groups(options)\n  end\nend\n"

#pin_order ⇒ Object

API v2, deprecated



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# File 'lib/origen/pins.rb', line 355

def pin_order
  @pin_order ||= 10_000_000
  @pin_order += 1
end

#pin_order_block(order) ⇒ Object

API v2, deprecated



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# File 'lib/origen/pins.rb', line 361

def pin_order_block(order)
  pin_order_orig = @pin_order
  @pin_order = order * 1000
  yield
  @pin_order = pin_order_orig
end

#pin_pattern_exclude(*pin_ids) ⇒ Object

Specify the pins will not appear in the output pattern



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# File 'lib/origen/pins.rb', line 299

def pin_pattern_exclude(*pin_ids)
  if pin_ids.last.is_a?(Hash)
    options = pin_ids.pop
  else
    options = {}
  end
  pin_ids.each do |id|
    if pin_aliases[id]
      Origen.app.pin_names[pin_aliases[id].first] = id
      id = pin_aliases[id].first
    end
    Origen.app.pin_pattern_exclude << id
  end
  Origen.app.pin_pattern_exclude << options unless options.empty?
end

#pin_pattern_order(*pin_ids) ⇒ Object

Specify the order that pins will appear in the output pattern, unspecified pins will appear in an arbitrary order at the end

API v2, deprecated



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# File 'lib/origen/pins.rb', line 282

def pin_pattern_order(*pin_ids)
  if pin_ids.last.is_a?(Hash)
    options = pin_ids.pop
  else
    options = {}
  end
  pin_ids.each do |id|
    if pin_aliases[id]
      Origen.app.pin_names[pin_aliases[id].first] = id
      id = pin_aliases[id].first
    end
    Origen.app.pin_pattern_order << id
  end
  Origen.app.pin_pattern_order << options unless options.empty?
end

#pins(id = nil, options = {}, &_block) ⇒ Object Also known as: pin

Permits access via object.pin(x), returns a hash of all pins if no id is specified.

Examples

$top.pin(:done)
$soc.pin(:port_a1)
pin(:fail)          # Access directly from within the module



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# File 'lib/origen/pins.rb', line 562

def pins(id = nil, options = {}, &_block)
  id, options = nil, id if id.is_a?(Hash)
  if id
    pin = Origen.pin_bank.find(id, options)
    unless pin
      puts "You have tried to reference pin :\#{id} within \#{self.class} but it does not exist, this could be\nbecause the pin has not been defined yet or it is an alias that is not available in the current context.\n\nIf you meant to define the pin then use the add_pin method instead.\n\n      END\n      fail 'Pin not found'\n    end\n    pin\n  else\n    if options[:power_pin]\n      Origen.pin_bank.power_pins\n    elsif options[:ground_pin]\n      Origen.pin_bank.ground_pins\n    else\n      Origen.pin_bank.pins\n    end\n  end\nend\n"

#power_pin_groups(id = nil, options = {}, &_block) ⇒ Object Also known as: power_pin_group

Equivalent to the pin_groups method but considers power pins rather than regular pins



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# File 'lib/origen/pins.rb', line 513

def power_pin_groups(id = nil, options = {}, &_block)
  id, options = nil, id if id.is_a?(Hash)
  if id
    pin = Origen.pin_bank.find(id, options.merge(power_pin: true))
    unless pin
      puts "You have tried to reference power_pin_group :\#{id} within \#{self.class} but it does not exist, this could be\nbecause the pin group has not been defined yet or it is an alias that is not available in the current context.\n\nIf you meant to define the power_pin_group then use the add_power_pin_group method instead.\n\n      END\n      fail 'Power pin group not found'\n    end\n    pin\n  else\n    Origen.pin_bank.power_pin_groups(options)\n  end\nend\n"

#power_pins(id = nil, options = {}, &block) ⇒ Object

Equivalent to the pins method but considers power pins rather than regular pins



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# File 'lib/origen/pins.rb', line 590

def power_pins(id = nil, options = {}, &block)
  id, options = nil, id if id.is_a?(Hash)
  options = {
    power_pin: true
  }.merge(options)
  pins(id, options, &block)
end