The AVR RISC microcontroller family is made by Atmel Corp. It uses a RISC core running single cycle instructions, and a well defined I/O structure that limits need for external components. Some features in AVR devices: internal oscillators, timers, UART, SPI, pull-up resistors, pulse width modulation, ADC, analog comparator, watch-dog timers. The architecture was created at the Norwegian Institute of Technology (NTH), by two students: Alf-Egil Bogen, Vegard Wollan, and developed further at Atmel Norway AS, a subsidiary founded by them. The chip is supported by Atmel, and by a vibrant, large, and growing user community, which provides free projects, software, tutorials, and much other assistance.
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- AVR-Assembler-Tutorial Introduces assembly programming language for Atmel AVR processors (AT90S) with practical examples. English, Deutsch.
- WinAVR Suite of executable software development tools for Atmel AVR RISC processors, hosted on the Windows platform, has GNU GCC compiler for C/C++. Open source.
- HP InfoTech S.R.L. Makes CodeVisionAVR C compiler, integrated development environment (IDE), automatic program generator, ChipBlasterAVR in-system programmer, code wizard, for Atmel AVR processors. [commercial]
- The AVR Assembler Site Descriptions, tutorials, many code samples: application notes with commented source code.
- AVR Libc Goal: high quality C library to use with GCC on Atmel AVR microcontrollers. Together, avr-binutils, avr-gcc, and avr-libc are the core of the open source toolchain for AVR.
- AVR Butterfly and Beginners Site The Butterfly is a credit-card sized demo board from Atmel Corp. It is feature-dense and low cost. Descriptions, tutorials, forum, block diagram, primer, many code samples: application notes with commented source code.
- AVRButterfly: AVR Butterfly and Beginners Group Email forum at Yahoo Tech Groups.
- Atmel AVR Growing article, with links to many related topics. [Wikipedia]
- MCS Electronics Makes BASCOM AVR/8051 Windows BASIC compiler, educational development board, with tutorials, forum; other embedded electronic systems.
- ECE476 Final Projects Many electrical engineering student projects, using Atmel ATmega32 AVR chips. Cornell University.
- ScienceProg AVR tutorials, projects, links; and other science, embedded, biomedical engineering, physics content.
- AVR Freaks News in Weblog format, links, forum, tutorials, articles, specifications; devices, tools, projects, vendors. Some areas need registration.
- AVR Microcontroller Projects Many projects, tutorials; tools, book list, photo gallery, links.
- Linux Development Tools for Atmel AVR Tool chain development for AVR on Linux: programmer hardware, Linux driver, AVRASM-compatible assembler/linker, debugger, simulator. Theiling Online.
- Dick Cappels' Project Pages Many projects using microcontrollers (AVR, ATMega8, ATmega163, ATtiny12, ATtiny2313, AT90S1200A, AT90S2313, AT90S8515/ATMEGA8515), analog, RF, and all 3 mixed; much free information.
- AVR 8-Bit RISC Official product information from Atmel Corp. Include overview, technical specifications, details of application support, and information about various associated tools and software.
- WebRing: AVR Set of links to websites on Atmel AVR microcontrollers, related projects.