From 6f7731bb6deac290575c5173ea17381951637a57 Mon Sep 17 00:00:00 2001 From: WestfW Date: Thu, 9 Jun 2011 22:36:05 -0700 Subject: Makefile modification to allow building optiboot in more environments. Allows building within the Arduino Source tree, and within the Arduino IDE tree, as well as using CrossPack on Mac. Adds README.TXT to track arduino-specific changes (and documents the new build options.) This addresses Arduino issue: http://code.google.com/p/arduino/issues/detail?id=487 And optiboot issue http://code.google.com/p/optiboot/issues/detail?id=1 (which can be thought of as a subset of the Arduno issue.) Note that the binaries produced after these Makefile changes (using any of the compile environments) are identical to those produced by the crosspack-20100115 environment on a Mac. (cherry picked from commit 2d2ed324b48e709f59a002cb274ed60bb0ebc911) --- bootloaders/optiboot/README.TXT | 55 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 bootloaders/optiboot/README.TXT (limited to 'bootloaders/optiboot/README.TXT') diff --git a/bootloaders/optiboot/README.TXT b/bootloaders/optiboot/README.TXT new file mode 100644 index 0000000..9a68e23 --- /dev/null +++ b/bootloaders/optiboot/README.TXT @@ -0,0 +1,55 @@ +This directory contains the Optiboot small bootloader for AVR +microcontrollers, somewhat modified specifically for the Arduino +environment. + +Optiboot is more fully described here: http://code.google.com/p/optiboot/ +and is the work of Peter Knight (aka Cathedrow), building on work of Jason P +Kyle, Spiff, and Ladyada. Arduino-specific modification are by Bill +Westfield (aka WestfW) + +Arduino-specific issues are tracked as part of the Arduino project +at http://code.google.com/p/arduino + + +------------------------------------------------------------ +Building optiboot for Arduino. + +Production builds of optiboot for Arduino are done on a Mac in "unix mode" +using CrossPack-AVR-20100115. CrossPack tracks WINAVR (for windows), which +is just a package of avr-gcc and related utilities, so similar builds should +work on Windows or Linux systems. + +One of the Arduino-specific changes is modifications to the makefile to +allow building optiboot using only the tools installed as part of the +Arduino environment, or the Arduino source development tree. All three +build procedures should yield identical binaries (.hex files) (although +this may change if compiler versions drift apart between CrossPack and +the Arduino IDE.) + + +Building optiboot in the arduino IDE install. + +Work in the .../hardware/arduino/bootloaders/optiboot/ and use the +"omake " command, which just generates a command that uses +the arduino-included "make" utility with a command like: + make OS=windows ENV=arduino +or make OS=macosx ENV=arduino +On windows, this assumes you're using the windows command shell. If +you're using a cygwin or mingw shell, or have one of those in your +path, the build will probably break due to slash vs backslash issues. +On a Mac, if you have the developer tools installed, you can use the +Apple-supplied version of make. +The makefile uses relative paths ("../../../tools/" and such) to find +the programs it needs, so you need to work in the existing optiboot +directory (or something created at the same "level") for it to work. + + +Building optiboot in the arduino source development install. + +In this case, there is no special shell script, and you're assumed to +have "make" installed somewhere in your path. +Build the Arduino source ("ant build") to unpack the tools into the +expected directory. +Work in Arduino/hardware/arduino/bootloaders/optiboot and use + make OS=windows ENV=arduinodev +or make OS=macosx ENV=arduinodev -- cgit v1.2.3-18-g5258