AVR Assembler

Preface
1 AVR Assembler Known Issues
2 AVR Assembler Command Line Options
3 Assembler Source
4 AVR Assembler Syntax
5 Assembler Directives
- 5.1 BYTE
  Reserves bytes for a variable.
- 5.2 CSEG
  Code segment.
- 5.3 CSEGSIZE
  Program Memory Size.
- 5.4 DB
  Define constant byte(s) in program memory and EEPROM.
- 5.5 DD
  Define constant double-word(s) in program memory and EEPROM.
- 5.6 DEF
  Set a symbolic name on a register.
- 5.7 DQ
  Define constant quad-word(s) in program memory and EEPROM.
- 5.8 DSEG
  Data Segment.
- 5.9 DW
  Define constant word(s) in program memory and EEPROM.
- 5.10 ELIF and ELSE
  Conditional assembly.
- 5.11 ENDIF
  Conditional assembly.
- 5.12 ENDM and ENDMACRO
  End macro.
- 5.13 EQU
  Set a symbol equal to an expression.
- 5.14 ERROR
  Outputs an error message string.
- 5.15 ESEG
  EEPROM Segment.
- 5.16 EXIT
  Exit this file.
- 5.17 IF, IFDEF, and IFNDEF
  Conditional assembly.
- 5.18 INCLUDE
  Include another file.
- 5.19 LIST
  Turn the listfile generation on.
- 5.20 LISTMAC
  Turn macro expansion on.
- 5.21 MACRO
  Begin macro.
- 5.22 MESSAGE
  Output a message string.
- 5.23 NOLIST
  Turn listfile generation OFF.
- 5.24 ORG
  Set program origin.
- 5.25 OVERLAP and NOOVERLAP
  Set up overlapping section.
- 5.26 SET
  Set a symbol equal to an expression.
- 5.27 UNDEF
  Undefine a register symbolic name.
- 5.28 WARNING
  Outputs a warning message string.
6 Preprocessor
7 Expressions
The Assembler incorporates constant expressions.
8 AVR Instruction Set
9 Revision History
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5.12 ENDM and ENDMACRO

End macro.

The ENDMACRO directive defines the end of a macro definition. The directive does not take any parameters. See the MACRO directive for more information on defining macros. ENDM is an alternative form, fully equivalent with ENDMACRO.

Syntax

.ENDMACRO
.ENDM

Example

.MACRO SUBI16 ; Start macro definition 
subi r16,low(@0) ; Subtract low byte 
sbci r17,high(@0) ; Subtract high byte 
.ENDMACRO

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