Imagecraft c compiler and development environment for the atmel avr

ICCV8 for AVR – C Compiler for Atmel AVRIf you reference any text area function by address, then it must be done indirectly. Itsaddress must be put in a word in the area func_lit. At runtime, you must dereferencethe content of this word to get the correct address of the function. Note thatif you are using C to call a function indirectly, the compiler will take care of all thesedetails for you. The information is useful if you are writing assembly code.Temporarily Deactivating the Code CompressorSometimes you may wish to disable the code compressor temporarily. For example,perhaps the code is extremely timing-sensitive and it cannot afford to lose cycles bygoing through the extra function call and return overhead. You can do this bybracketing code fragments with an instruction pair:asm(“.nocc_start”);...asm(“.nocc_end”);The code compressor ignores the instructions between these assembler directives inthe fragment.The compiler provides the following macros in the system include file:COMPRESS_DISABLE; // disable Code CompressorCOMPRESS_REENABLE; // enable Code Compressor againfor use in C programs.178