diff options
Diffstat (limited to 'upgrade/generate-data.rb')
| -rw-r--r-- | upgrade/generate-data.rb | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/upgrade/generate-data.rb b/upgrade/generate-data.rb index c54f679..875870c 100644 --- a/upgrade/generate-data.rb +++ b/upgrade/generate-data.rb @@ -7,9 +7,12 @@ puts data.instance_variable_get(:@bytes).inspect data = data.bytes # find start address -start_address = 0 +start_address = 16 # skip past baked in trampoline - upgrade firmware generates one anyway! +# TODO: Verify jump table? or store it in the upgrade firmware for verbatim installation? start_address += 1 while data[start_address] == 0xFF +raise "Seems to be junk data quite early in the bootloader" unless start_address > 100 + # trim blank padding data from start of data start_address.times { data.shift } @@ -20,11 +23,13 @@ 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 "// This file contains the bootloader data itself and the address to" + file.puts "// install the bootloader" + file.puts "// Use generate-data.rb with ruby 1.9 or 2.0 to generate these" + file.puts "// values from a hex file" + file.puts "// Generated from #{ARGV.first} at #{Time.now} by #{ENV['USER']}" file.puts "" - file.puts "uint16_t bootloader_data[#{data.length / 2}] PROGMEM = {" + file.puts "const 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(', ') |