Class: GdbFlasher::MCU

Inherits:
Object
  • Object
show all
Defined in:
lib/gdbflasher/mcu.rb

Direct Known Subclasses

CortexM

Instance Method Summary collapse

Constructor Details

#initialize(connection) ⇒ MCU

Returns a new instance of MCU.



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# File 'lib/gdbflasher/mcu.rb', line 4

def initialize(connection)
  @connection = connection
  @symbol_table = {}

  helper_hex = File.join HELPERS, helper_name + ".hex"
  helper_sym = File.join HELPERS, helper_name + ".sym"

  File.open(helper_sym, "r") do |f|
    f.each_line do |line|
      line.rstrip!

      address, symbol = line.split(" ")

      @symbol_table[symbol.intern] = address.to_i 16
    end
  end

  helper = nil
  File.open(helper_hex, "r") { |f| helper = IHex.load f }

  connection.reset
  connection.get_stop_reply

  helper.segments.each do |segment|
    connection.write_memory segment.base, segment.data
  end

  initialize_environment

  @connection.insert_breakpoint 0, @symbol_table[:trap], breakpoint_kind

  call_helper :initialize
end

Instance Method Details

#finalize ⇒ Object 



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# File 'lib/gdbflasher/mcu.rb', line 38

def finalize
  call_helper :finalize

  @connection.remove_breakpoint 0, @symbol_table[:trap], breakpoint_kind
end

#program_ihex(ihex, extra = {}) ⇒ Object 



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# File 'lib/gdbflasher/mcu.rb', line 44

def program_ihex(ihex, extra = {})
  sectors = []
  sector_actions = []

  sector_map = self.class.const_get :SECTORS

  sector_map.each_index do |i|
    sector_begin, sector_end = sector_map[i]

    sector_segment = nil

    ihex.segments.each do |segment|
      intersection = segment.intersect sector_begin, sector_end

      if intersection.size > 0
        if sector_segment.nil?
          sector_segment = IHex::Segment.new
          sector_segment.base = sector_begin
          sector_segment.data = blank_byte.chr * (sector_end - sector_begin + 1)

          sectors << sector_segment
        end

        affected_range = intersection.base - sector_begin...intersection.base + intersection.size - sector_begin
        sector_segment.data[affected_range] = intersection.data
      end
    end
  end

  if extra[:read_disallowed]
    sector_actions = [ [ :erase, :program ] ] * sectors.count
  else
    puts "Checking sectors"

    sectors.each do |sector|
      data = @connection.read_memory sector.base, sector.size

      if data == sector.data
        sector_actions << [ ]
      elsif is_blank(data)
        sector_actions << [ :program, :verify ]
      elsif is_blank(sector.data)
        sector_actions << [ :erase, :verify ]
      else
        sector_actions << [ :erase, :program, :verify ]
      end
    end
  end

  puts "Programming sectors:"
  sectors.each_index do |i|
    sector = sectors[i]
    actions = sector_actions[i]

    next if actions.empty?

    sector_id = sector_map.index { |i| i[0] == sector.base }

    printf " - %08X - %08X: ", sector.base, sector.base + sector.size - 1

    actions.each do |action|
      case action
      when :erase
        print "erase, "

        status = erase sector_id
        if status != 0
          puts "failure!"
          warn "Unable to erase sector #{sector_id}, vendor-specific error #{status}"

          return false
        end

      when :program
        print "program, "

        offset = 0
        page_size = @symbol_table[:PAGE_SIZE]
        buffer = @symbol_table[:page_buffer]

        while offset < sector.size
          @connection.write_memory buffer, sector.data[offset...offset + page_size]
          status = program sector.base + offset

          if status != 0
            puts "failure!"
            warn "Unable to program page #{(sector.base + offset).to_s 16}, vendor-specific error #{status}"

            return false
          end

          offset += page_size
        end

      when :verify
        print "verify, "

        data = @connection.read_memory sector.base, sector.size

        if data != sector.data
          puts "failure!"
          warn "Verification of sector #{sector_id} failed."

          return false
        end
      end
    end

    print "all ok.\n"
  end

  true
end