AVR microcontrollers: Difference between revisions

Revision as of 03:31, 14 October 2004

Revision as of 15:23, 14 October 2004

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The '''Atmel AVR'''* is a family of [[RISC]] [[microcontroller]]s from [[Atmel]]. The AVR architecture was conceived by two students* at the [[Norwegian Institute of Technology]] (NTH) and further refined and developed at '''Atmel Norway''', the Atmel daughter company founded by the two chip architects.

Unlike the [[PIC microcontroller|PIC]], the AVR [[instruction set]] is strictly orthogonal and compatible across models. The AVR was designed at the outset for efficient execution of [[compiler|compiled]] [[C programming language|C]] code. Thus some instructions, such as '<code>add immediate</code>', are strangely missing (you have to '<code>subtract immediate</code>' the [[complement]] instead), while others, such as '<code>compare with carry</code>', are included. Like the PIC, it has a dedicated [[hobbyist]] following (exemplified by the ''AVRFreaks'' Internet forum), largely due to the existence of inexpensive/free development tools, for instance a port of the GNU [[GNU Compiler Collection|GCC]] tools.

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*[http://www.atmel.no Atmel Norway]

*[http://www.avrfreaks.net AVRFreaks]

*[http://winavr.sourceforge.net/ WinAVR -development atools] suiteat of[[Sourceforge]] executable,&ndash; open source softwaretool development tools for the Atmel AVR series of RISC microprocessorssuite hosted on theMicrosoft Windows, platform.and It includes the GNUincluding GCC compiler for C and C++.]

*[http://www.pvv.org/~torhr/avrmon-stk200/ avrmon-stk200] &ndash; avr-[[GNU Debugger|gdb]] compatible [[Linux|GNU/Linux]]-based [[debugging|debug]] [[machine code monitor|monitor]] system for connecting to Atmels "STK200 Starter Kit"