IAR for AVR Study Notes (2) -- Extended Keywords-EEWORLD

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It can be used to solve the storage of data and functions. With it, we can define variables and store them in EEPROM and FLASH space. Define interrupt functions, pointers, etc. There are many IAR keywords, and only the commonly used ones are listed here.

2.1. Extended keywords: used to control data and pointers.
__eeprom is used for EEPROM storage space, controls data storage, controls pointer type and storage
__tinyflash, __flash, __farflash, __hugeflash are used for flash storage space, controls data storage, controls pointer type and storage:
__ext_io, __io are used for I/O storage space, controls data storage, controls pointer type and storage
__regvar places a variable in a working register

2.2. Function extension keywords:
__nearfunc __farfunc are used to control data storage. This group of keywords must be specified when declaring and defining the function:
__interrupt. Keywords control the type of the function. This group of keywords must be specified when declaring and defining the function
. __root. Keywords only control defined functions:

2.3. Other special keywords:
@ is used to locate the absolute address of the variable. You can also use the #pragma location command
#pragma vector to provide the entry address of the interrupt function.
__root ensures that unused functions or variables can also be included in the target code
__no_init prohibits initialization of variables when the system starts.
asm, __asm insert assembly code

Keywords：IAR Reference address：IAR for AVR Study Notes (2) -- Extended Keywords

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