1 files changed, 34 insertions, 0 deletions
diff --git a/upgrade/generate-data.rb b/upgrade/generate-data.rb
new file mode 100644
index 0000000..c54f679
--- /dev/null
+++ b/upgrade/generate-data.rb
@@ -0,0 +1,34 @@
+require_relative "../ruby/micronucleus.rb"
+
+data = HexProgram.new(open ARGV.first)
+
+puts data.instance_variable_get(:@bytes).inspect
+
+data = data.bytes
+
+# find start address
+start_address = 0
+start_address += 1 while data[start_address] == 0xFF
+
+# trim blank padding data from start of data
+start_address.times { data.shift }
+
+# if data is an odd number of bytes make it even
+data.push 0xFF while (data.length % 2) != 0
+
+puts "Length: #{data.length}"
+puts "Start address: #{start_address}"
+
+File.open "bootloader_data.c", "w" do |file|
+  file.puts "// This file contains the bootloader data itself and the address to install the bootloader at"
+  file.puts "// Use generate-data.rb with ruby 1.9 to generate these values from a hex file"
+  file.puts "// Generated from #{ARGV.first} at #{Time.now}"
+  file.puts ""
+  file.puts "uint16_t bootloader_data[#{data.length / 2}] PROGMEM = {"
+  file.puts data.each_slice(2).map { |big_end, little_end|
+    "0x#{ ((little_end * 256) + big_end).to_s(16).rjust(4, '0') }"
+  }.join(', ')
+  file.puts "};"
+  file.puts ""
+  file.puts "uint16_t bootloader_address = #{start_address};"
+end
+\ No newline at end of file