class Escalator::IntelHex

Attributes

codes[R]
offset[R]

Public Class Methods

load(path) click to toggle source
# File lib/escalator/intel_hex.rb, line 30
def self.load path
  offset = 0
  codes = []
  File.read(path).lines.each do |l|
    case l[7,2]
    when "00"
      address = l[3,4].to_i(16)
      offset ||= address
      l.chomp[9..-3].each_char.each_slice(2).each_with_index do |pair, i|
        codes[address - offset + i] = pair.join("").to_i(16)
      end
    end
  end
  new codes, offset
end
new(codes, offset = 0) click to toggle source
# File lib/escalator/intel_hex.rb, line 46
def initialize codes, offset = 0
  @offset = offset
  @codes = codes
end

Public Instance Methods

dump() click to toggle source
# File lib/escalator/intel_hex.rb, line 55
def dump
  addr = offset
  lines = []
  @codes.each_slice(16) do |line_codes|
    c = line_codes.size
    s = ":#{c.to_s(16).rjust(2, '0')}"
    s << "#{addr.to_s(16).rjust(4, '0')}"
    s << "00"
    line_codes.each do |code|
      s << "#{code.to_s(16).rjust(2, '0')}"
    end
    check_sum = 256 - (s[1..-1].scan(/.{2}/).inject(0){|sum, code| sum += code.to_i(16)} & 0xff)
    s << "#{check_sum.to_s(16).rjust(2, '0')}"
    lines << s
    addr += c
  end

  lines << ":00000001FF"
  lines << ""
  lines.join("\n")
end
write_to(path) click to toggle source
# File lib/escalator/intel_hex.rb, line 51
def write_to path
  File.write(path, dump)
end