Forked from official Optiboot repo: <https://code.google.com/p/optiboot/>.
# Original text
------------------------------------------------------------
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 <targets>" command, which just generates a command that uses
the arduino-included "make" utility with a command like:
make OS=windows ENV=arduino <targets>
or make OS=macosx ENV=arduino <targets>
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 <targets>
or make OS=macosx ENV=arduinodev <targets>
Programming Chips Using the \_isp Targets
The CPU targets have corresponding ISP targets that will actuall
program the bootloader into a chip. "atmega328\_isp" for the atmega328,
for example. These will set the fuses and lock bits as appropriate as
well as uploading the bootloader code.
ISP Targets in Version 5.0 and later:
The isp targets are now built using a separate "Makefile.isp" makefile,
which should make modification easier and more obvious. This also fixes
the atmega8\_isp target problem mentioned below. The default
configuration assumes an ArduinoISP setup, but you will probably need to
update at least the serial port, since those are different for each
Arduino board and/or system/
ISP Targets in Version 4.6 and earlier:
The older makefiles default to using a USB programmer, but you can use a
serial programmer like ArduinoISP by changing the appropriate variables
when you invoke make:
```
make ISPTOOL=stk500v1 ISPPORT=/dev/tty.usbserial-A20e1eAN ISPSPEED=-b19200 atmega328_isp
```
The "atmega8\_isp" target does not currently work, because the mega8
doesn't have the "extended" fuse that the generic ISP target wants to
pass on to avrdude. You'll need to run avrdude manually.
Standard Targets
I've reduced the pre-built and source-version-controlled targets
(.hex and .lst files included in the git repository) to just the
three basic 16MHz targets: atmega8, atmega16, atmega328.
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2019-09-18
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Arduino-Sanguino.zip,Arduino IDE的Sanguino插件,基于http://code.google.com/p/sanguino/sanguino,Arduino是一家开源软硬件公司和制造商社区。Arduino始于21世纪初,深受电子制造商的欢迎,Arduino通过开源系统提供了很多灵活性。
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