Class: OrigenTesters::IGXLBasedTester::J750

Inherits:
Base
  • Object
show all
Defined in:
lib/origen_testers/igxl_based_tester/j750.rb,
lib/origen_testers/igxl_based_tester/j750/flow.rb,
lib/origen_testers/igxl_based_tester/j750/patset.rb,
lib/origen_testers/igxl_based_tester/j750/patsets.rb,
lib/origen_testers/igxl_based_tester/j750/patsubr.rb,
lib/origen_testers/igxl_based_tester/j750/patgroup.rb,
lib/origen_testers/igxl_based_tester/j750/patsubrs.rb,
lib/origen_testers/igxl_based_tester/j750/flow_line.rb,
lib/origen_testers/igxl_based_tester/j750/generator.rb,
lib/origen_testers/igxl_based_tester/j750/patgroups.rb,
lib/origen_testers/igxl_based_tester/j750/test_instance.rb,
lib/origen_testers/igxl_based_tester/j750/patset_pattern.rb,
lib/origen_testers/igxl_based_tester/j750/test_instances.rb,
lib/origen_testers/igxl_based_tester/j750/patsubr_pattern.rb,
lib/origen_testers/igxl_based_tester/j750/test_instance_group.rb,
lib/origen_testers/igxl_based_tester/j750/custom_test_instance.rb

Overview

Tester model to generate .atp patterns for the Teradyne J750

Basic Usage

$tester = Testers::J750.new
$tester.cycle       # Generate a vector

Many more methods exist to generate J750 specific micro-code, see below for details.

Also note that this class inherits from the base Tester class and so all methods described there are also available.

Direct Known Subclasses

J750_HPT

Defined Under Namespace

Modules: Generator Classes: CustomTestInstance, Flow, FlowLine, Patgroup, Patgroups, Patset, PatsetPattern, Patsets, Patsubr, PatsubrPattern, Patsubrs, TestInstance, TestInstanceGroup, TestInstances

Instance Attribute Summary collapse

Attributes inherited from Base

#channelmap, #default_channelmap, #default_testerconfig, #max_site, #memory_test_en, #min_repeat_loop, #pattern_compiler_pinmap, #testerconfig

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#apply_digcap_settings, #apply_digsrc_settings, #assign_dc_instr_pins, #assign_digcap_pins, #assign_digsrc_pins, #branch_to, #call_match, #call_subroutine, #called_subroutines, #cycle, #digcap_store, #digsrc_overlay, #digsrc_send, #digsrc_skip_start, #digsrc_start, #digsrc_stop, #enable_flag, #end_subroutine, #flows, #format_multiple_instrument_pins, #format_vector, #freq_count, #get_dc_instr_pins, #get_digcap_pins, #get_digsrc_pins, #get_instrument_slots, #get_tester_channel, #get_tester_instrument, #ignore_fails, #igxl_based?, #import_chanmap, #import_tester_config, #is_hexvs_plus, #is_vhdvs_hc, #is_vhdvs_plus, #label, #local_subroutines, #loop_vectors, #mask_fails, #match, #memory_test, #merged_channels, #overlay_style_warn, #parser, #push_instrument, #push_microcode, #remove_store_from_vector, #repeat_previous, #set_code, #set_flag, #start_subroutine, #store, #store_next_cycle, #subroutine_overlay

Methods included from VectorBasedTester

#register_tester

Constructor Details

#initializeJ750

Returns a new J750 instance, normally there would only ever be one of these assigned to the global variable such as $tester by your target.


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# File 'lib/origen_testers/igxl_based_tester/j750.rb', line 29

def initialize
  super
  @pipeline_depth = 34  # for extended mode is vectors, for normal mode is vector pairs (54 for J750Ex)
  @use_hv_pin = false   # allows to use high voltage for a pin for all patterns
  @software_version = '3.50.40'
  @name = 'j750'
  @@hpt_mode = false
  @opcode_mode = :extended
  @loop_bits_max = 16             # maximum loop bit length

  @flags = %w(cpuA cpuB cpuC cpuD)
  @microcode[:enable] = 'enable'
  @microcode[:set_flag] = 'set_cpu'
  @microcode[:mask_vector] = 'ign ifc icc'
  @microcode[:keepalive] = 'keep_alive'
end

Instance Attribute Details

#software_versionObject

Returns the value of attribute software_version.


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# File 'lib/origen_testers/igxl_based_tester/j750.rb', line 18

def software_version
  @software_version
end

#use_hv_pinObject

Returns the value of attribute use_hv_pin.


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# File 'lib/origen_testers/igxl_based_tester/j750.rb', line 17

def use_hv_pin
  @use_hv_pin
end

Class Method Details

.hpt_modeObject


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# File 'lib/origen_testers/igxl_based_tester/j750.rb', line 20

def self.hpt_mode
  @@hpt_mode
end

.hpt_mode?Boolean

Returns:

  • (Boolean)

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# File 'lib/origen_testers/igxl_based_tester/j750.rb', line 23

def self.hpt_mode?
  @@hpt_mode
end

Instance Method Details

#handshake(options = {}) ⇒ Object

Handshake with the tester.

Will set a cpu flag (A) and wait for it to be cleared by the tester, optionally pass in a read code to pass information to the tester.

Examples

$tester.handshake                   # Pass control to the tester for a measurement
$tester.handshake(:readcode => 10)  # Trigger a specific action by the tester

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# File 'lib/origen_testers/igxl_based_tester/j750.rb', line 245

def handshake(options = {})
  options = {
    readcode:    false,
    manual_stop: false,    # set a 2nd CPU flag in case 1st flag is automatically cleared
  }.merge(options)
  if options[:readcode]
    set_code(options[:readcode])
  end
  if options[:manual_stop]
    cycle(microcode: "#{@microcode[:enable]} (#{@flags[1]})")
    cycle(microcode: "#{@microcode[:set_flag]} (#{@flags[0]} #{@flags[1]})")
    cycle(microcode: "loop_here_#{@unique_counter}: if (flag) jump loop_here_#{@unique_counter}")
  else
    cycle(microcode: "#{@microcode[:set_flag]} (#{@flags[0]})")
    cycle(microcode: "loop_here_#{@unique_counter}: if (#{@flags[0]}) jump loop_here_#{@unique_counter}")
  end
  @unique_counter += 1  # Increment so a different label will be applied if another
  # handshake is called in the same pattern
end

#keep_alive(options = {}) ⇒ Object


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# File 'lib/origen_testers/igxl_based_tester/j750.rb', line 265

def keep_alive(options = {})
  $tester.cycle microcode: "#{@microcode[:keepalive]}"
end

#match_block(timeout, options = {}, &block) ⇒ Object

Generates a match loop based on vector condition passed in via block

This method is not really intended to be called directly, rather you should call via Tester#wait:

e.g. $tester.wait(:match => true) do
       reg(:status_reg).bit(:done).read(1)!  # vector condition that you want to match
     end

The timeout should be provided in cycles, however when called via the wait method the time-based helpers (time_in_us, etc) will be converted to cycles for you.

The following options are available to tailor the match loop behavior, defaults in parenthesis:

  • :check_for_fails (false) - Flushes the pipeline and handshakes with the tester (passing readcode 100) prior to the match (to allow binout of fails encountered before the match)

  • :force_fail_on_timeout (true) - Force a vector mis-compare if the match loop times out

  • :on_timeout_goto (“”) - Optionally supply a label to branch to on timeout, by default will continue from the end of the match loop

  • :on_block_match_goto (“”) - Optionally supply a label to branch to when block condition is met, by default will continue from the end of the match loop. A hash will also be accepted for this argument to supply a specific label (or no label) for each block e.g. {0 => "on_block_0_fail"}

  • :multiple_entries (false) - Supply an integer to generate multiple entries into the match (each with a unique readcode), this can be useful when debugging patterns with multiple matches

  • :force_fail_on_timeout (true) - force pattern to fail if timeout occurs

  • :global_loops (false) - whether match loop loops should use global labels

  • :manual_stop (false) - whether to use extra cpuB flag to resolve IG-XL v.3.50.xx bug where VBT clears cpuA immediately

    at start of PatFlagFunc instead of at end.  Use will have to manually clear cpuB to resume this pattern.
    

Examples

$tester.wait(:match => true, :time_in_us => 5000, :pin => $top.pin(:done), :state => :high) do
  <vectors>
end

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# File 'lib/origen_testers/igxl_based_tester/j750.rb', line 87

def match_block(timeout, options = {}, &block)
  options = {
    check_for_fails:       false,
    on_timeout_goto:       false,
    on_block_match_goto:   false,
    multiple_entries:      false,
    force_fail_on_timeout: true,
    global_loops:          false,
    manual_stop:           false,
    clr_fail_post_match:   false
  }.merge(options)

  unless block_given?
    fail 'ERROR: block not passed to match_block!'
  end

  # Create BlockArgs objects in order to receive multiple blocks
  match_conditions = Origen::Utility::BlockArgs.new
  fail_conditions = Origen::Utility::BlockArgs.new

  # yield object to calling routine to get populated with blocks
  if block.arity > 0
    yield match_conditions, fail_conditions
  else
    # for backwards compatibility with Origen core call to match_block
    match_conditions.add(&block)
    fail_conditions.add(&block)
  end

  # Flush the pipeline first and then pass control to the program to bin out any failures
  # prior to entering the match loop
  if options[:check_for_fails]
    if options[:multiple_entries]
      @match_entries.times do |i|
        microcode "global subr match_done_#{i}:"
        set_code(i + 100)
        cycle(microcode: 'jump call_tester') unless i == @match_entries - 1
      end
      microcode 'call_tester:'
    else
      set_code(100)
    end
    cc 'Wait for any prior failures to propagate through the pipeline'
    cycle(microcode: 'pipe_minus 1')
    cc 'Now handshake with the tester to bin out and parts that have failed before they got here'
    handshake(manual_stop: options[:manual_stop])
  end

  # Now do the main match loop
  cc 'Start the match loop'

  global_opt = (options[:global_loops]) ? 'global ' : ''
  microcode "#{global_opt}match_outer_loop_#{@unique_counter}:"
  cycle # (:microcode => "loopB #{outer_loop_count} ign ifc icc")
  set_loopb_vector = last_vector

  microcode "#{global_opt}match_inner_loop_#{@unique_counter}:"
  cycle # (:microcode => "loopA #{inner_loop_count} ign ifc icc")
  set_loopa_vector = last_vector

  # count cycles in match loop block passed to help with meeting
  # desired timeout value (have to back assign microcodes above)
  prematch_cycle_count = cycle_count
  match_conditions.each_with_index do |condition, i|
    mask_fails(true)
    condition.call  # match condition
    mask_fails(false)
    cc ' Wait for the result to propagate through the pipeline'
    cycle(microcode: 'pipe_minus 1 ign ifc icc')
    inc_cycle_count(@pipeline_depth - 1)                   # Account for pipeline depth
    cc "Branch if block condition #{i} met"
    cycle(microcode: "if (pass) jump block_#{i}_matched_#{@unique_counter} icc ifc")
    cycle(microcode: 'clr_flag (fail) icc')
  end
  match_conditions_cycle_count = cycle_count - prematch_cycle_count
  cc "Match loop cycle count = #{match_conditions_cycle_count}"

  # reduce timeout requested by match loop cycle count
  timeout = (timeout.to_f / match_conditions_cycle_count).ceil

  # Calculate the loop counts for the 2 loops to appropriately hit the timeout requested
  loop_value = timeout.to_f.floor

  if loop_value < (2**@loop_bits_max)
    # small value, only need to use one loop
    outer_loop_count = 1
    inner_loop_count = loop_value
  elsif loop_value < (2**(2 * @loop_bits_max))
    # 2 nested loops required
    inner_loop_count = 2**@loop_bits_max - 1
    outer_loop_count = (loop_value.to_f / inner_loop_count).ceil
  else
    abort 'ERROR: timeout value too large in tester match method!'
  end

  # retroactively set loop counter values for timeout based on cycles in match loop condition
  unless @inhibit_vectors
    set_loopb_vector.microcode = "loopB #{outer_loop_count} ign ifc icc"
    set_loopa_vector.microcode = "loopA #{inner_loop_count} ign ifc icc"
  end

  cc 'Loop back around if time remaining'
  cycle(microcode: "end_loopA match_inner_loop_#{@unique_counter} icc")
  cycle(microcode: "end_loopB match_outer_loop_#{@unique_counter} icc")

  if options[:force_fail_on_timeout]
    cc 'To get here something has gone wrong, check block again to force a pattern failure'
    fail_conditions.each(&:call)
  end

  if options[:on_timeout_goto]
    cycle(microcode: "jump #{options[:on_timeout_goto]} icc")
  else
    cycle(microcode: "jump match_loop_end_#{@unique_counter} icc")
    # cycle(:microcode => 'halt')
  end
  match_conditions.each_with_index do |condition, i|
    microcode "block_#{i}_matched_#{@unique_counter}:"
    cycle(microcode: 'pop_loop icc')
    cycle(microcode: 'clr_fail')
    if options[:on_block_match_goto]
      if options[:on_block_match_goto].is_a?(Hash)
        if options[:on_block_match_goto][i]
          custom_jump = options[:on_block_match_goto][i]
        else
          custom_jump = nil
        end
      else
        custom_jump = options[:on_block_match_goto]
      end
    end
    if custom_jump
      cycle(microcode: "jump #{custom_jump}")
    else
      # Don't do a jump on the last match block as it will naturally fall through
      # TODO: Update origen core to expose the size
      unless match_conditions.instance_variable_get(:@block_args).size == i + 1
        cycle(microcode: "jump match_loop_end_#{@unique_counter} icc")
      end
    end
  end
  microcode "match_loop_end_#{@unique_counter}:"
  if options[:clr_fail_post_match]
    cycle(microcode: 'clr_fail')
  end

  @unique_counter += 1  # Increment so a different label will be applied if another
  # handshake is called in the same pattern
end

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# File 'lib/origen_testers/igxl_based_tester/j750.rb', line 56

def pattern_footer(options = {})
  super(options)
end

#pattern_header(options = {}) ⇒ Object


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# File 'lib/origen_testers/igxl_based_tester/j750.rb', line 46

def pattern_header(options = {})
  super(options) do |pin_list|
    microcode "vector ($tset, #{pin_list})"
    microcode '{'
    unless options[:subroutine_pat]
      microcode 'start_label pattern_st:'
    end
  end
end