Imagecraft c compiler and development environment for the atmel avr

ICCV8 for AVR – C Compiler for Atmel AVRAccessing EEPROMThe EEPROM can be accessed at runtime using library functions. Use #include before calling these functions.IMPORTANT: These functions do not work for the XMega. XMega support will beprovided in a later release. EEPROM_READ(int location, object)This macro calls the EEPROMReadBytes function (see below) to read in the dataobject from the EEPROM location(s). The int “object” can be any program variable,including structures and arrays. For example,int i;EEPROM_READ(0x1, i); // read 2 bytes into i EEPROM_WRITE(int location, object)This macro calls the EEPROMWriteBytes function (see the next section) to writethe data object to the EEPROM location(s). The int “object” can be any programvariable, including structures and arrays. For example,int i;EEPROM_WRITE(0x1, i); // write 2 bytes to 0x1There are actually 3 sets of macros and functions: Most classic and mega AVRs AVRs with 256 bytes of EEPROM MegaAVRs with extended IOThe IDE predefines certain macros (e.g., ATMega168), so that the right macros andfunctions are used when you #include the eeprom.h header file. Thus, you mayuse the names given here for these macros and functions.Initializing EEPROMEEPROM can be initialized in your program source file by allocation of a globalvariable to a special area called eeprom. In C source, this can be done usingpragmas. See Program Areas for a discussion of the different program areas. Theresulting file is .eep. For example,#pragma data:eepromint foo = 0x1234;char table[] = { 0, 1, 2, 3, 4, 5 };136