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Avr-gcc versions comparison

Fri, 03/16/2007 - 10:51 — admin
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-AVR-GCC articles
AVR-GCC versions comparison By Dmitry K. 
Flash and Stack values are in bytes. 
Time units are in CPU clocks. 
All values were simulated by simulavr. 
Times and sizes are presented without initialization of function args.
Results 
 
 
 

 
AVR:                             at90s8515                 atmega8      
avr-gcc version:         3.3.6 3.4.6 4.0.4 4.1.2   3.3.6 3.4.6 4.0.4 4.1.2  
--------------------------------------------------------------------------
dtostre(1.2345,s,6,0)
                 Flash:   1024  1024  1120  1212     954   954  1038  1112  
                 Stack:     15    15    15    17      15    15    15    17  
                 Time:    1199  1199  1289  1315    1060  1060  1123  1155

Endless loops in embedded programs

Mon, 11/06/2006 - 20:10 — admin
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-AVR-GCC articles

 

A series of instructions that are constantly repeated. Also called an "infinite loop," it can be caused by an error in the program or be intentional. For example, a screen demo on continuous replay just keeps repeating itself.

Probably you have noticed that many programs have similar structure like:

 

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by Dr. Radut.