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This cool feature may be used for manually optimizing time critical parts of the software or to use specific processor instruction, which are not available in the C language. Because of a lack of documentation, especially for the AVR version of the compiler, it may take some time to figure out the implementation details by studying the compiler and assembler source code. There are also a few sample programs available in the net.
Hopefully this document will help to increase their number. It's assumed, that you are familiar with writing AVR assembler programs, because this is not an AVR assembler programming tutorial. It's not a C language tutorial either. Note that this document does not cover file written completely in assembler language, refer to avr-libc and assembler programs for this.
Now every thing seems correct, but it isn't really. For the latest release check http: The C compiler doesn't check any line of your assembler code. Shouldn't I initialize all my variables? This makes sense only for external or static variables, because local variables do not have symbolic names in the assembler code. There are also a few sample programs available in the net. Get fast, free shipping with Amazon Prime.
Permission is granted to copy and distribute verbatim copies of this manual provided that the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one.
This document describes version 3. There may be some parts, which hadn't been completely understood by the author himself and not all samples had been tested so far.
Because the author is German and not familiar with the English language, there are definitely some typos and syntax errors in the text. As a programmer the author knows, that a wrong documentation sometimes might be worse than none. Anyway, he decided to offer his little knowledge to the public, in the hope to get enough response to improve this document. Feel free to contact the author via e-mail.
For the latest release check http: As of 26th of July , this document has been merged into the documentation for avr-libc. The latest version is now available at http: JavaScript is disabled on your browser. Please enable JavaScript to enjoy all the features of this site. Note As of 26th of July , this document has been merged into the documentation for avr-libc.
Shouldn't I initialize all my variables? Why do some bit timer registers sometimes get trashed? How do I use a define'd constant in an asm statement? Why does the PC randomly jump around when single-stepping through my program in avr-gdb? How do I trace an assembler file in avr-gdb? How do I pass an IO port as a parameter to a function?
EN: Introduction to the assembler programming language for ATMEL AVR processors DE: Seite mit Einfuehrung in die Programmierung von AVR- Prozessoren statistic of the introduction to assembler www.farmersmarketmusic.com in English, German. AVR-Assembler in an english, french, german and turkish version, can easily be translated to other languages (send me your edited www.farmersmarketmusic.com and the.
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