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Programming the AVR Microcontroller with GCC

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... output lines, timers, UART for RS 232 communication and many other things. The best is however that a complete programming environment is available under Linux: You can program this Microcontroller in C ...

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LinuxFocus article number 231 http://linuxfocus.org by Guido Socher (homepage) About the author: Guido loves Linux not only because it is fun to discover the great possibilities of this systems but also because of the people involved in its design. Programming the AVR Microcontroller with GCC Abstract : Note: An updated version of this article is now available at: ./November2004/article352 The AVR 8-Bit RISC Microcontroller from Atmel is a very common Microcontroller Its a single integrated circuit with EEPROM, Ram, Analog to Digital converter, a lot of digital input and output lines, timers, UART for RS 232 communication and many other things. The best is however that a complete programming environment is available under Linux: You can program this Microcontroller in C using GCC. In this article I will explain how to install and use GCC. I will as well explain how to load the software into the Microcontroller.  All you need for this are an AT90S4433 Microcontroller,  a 4Mhz crystal, some cable and a few other very cheap parts. This article shall be only an introduction.  In a later article we will build a LCD display with a few push buttons, analog and digital inputs, hardware watchdog and LEDs. The idea is that this will be a general purpose control panel for a Linux Server but first we will learn how to setup the programming environment and that is what this article is about. _________________ _________________ _________________ Software installation: What you need To use the GNU C development environment you need the following software: binutils-2.11.2. tar.bz2 Available from: ftp://ftp.informatik.rwth-aachen.de/pub/gn u/binutils/ or ftp://gatekeeper.dec.com/pub/GNU/binutils/ gcc-core-3.0.3.tar.gz Available from: ftp://ftp.informatik.rwth-aachen.de/pub/gn u/gcc/ or ftp://gatekeeper.dec.com/pub/GNU/gcc/ avr-libc-20020106 .tar.gz The AVR C-library is available f ...

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