Der im Luna-Assembler eingebaute Präprozessor ist ein sog. Makroprozessor.
Im Präprozessor werden folgende Teilbereiche bearbeitet:
| Command | Description | Example |
|---|---|---|
| .equ | create a constant | .equ var = 123.45 |
| .set | create/assign a constant | .set var = 123.45 |
| .def | Alias | .def temp = R16 |
| .device | set the avr controller type | .device atmega32 |
| .import | import a label | .import _myLabel |
| .importClass1) | import avr class. sets all defines and constants of the selected avr controller inclusive .device | .importClass atmega32 |
| .importObject2) | import a library object | .importObject Macro_Delay |
| .importUsedObjects3) | auto-imports all in the source code used libraries objects | .importUsedObjects |
| .cseg | select flash segment | .cseg |
| .dseg | select sram segment | .dseg |
| .eseg | select eeprom segment | .eseg |
| .org | Sets the pointer of the actual active segment to a specific value | .org intVectorSize |
| .error | Display a error message. Break compile/assemble. | .error „message“ |
| .warning | Display a warning message. | .warning „message“ |
| .message, .print | Display a info message without line number and origin. | .message „message“ |
| .regisr | register a label to a interrupt vector „on the fly“ (used for Library Code) | .regisr vectorAddress,mylabel |
| .db | (byte) 1 byte each value and strings, data block. 4) | .db „hello“,0x3b |
| .dw | (word) 2 bytes each value, data block. 5) | .dw 0x3bda,0xcf01 |
| .dt | (triple) 3 bytes each value, data block. 6) | .dt 0xf0d1a4 |
| .dl | (long) 4 bytes each value, data block. 7) | .dl 0xff01ddca |
| .bin | (file) data block from file byte-wise. 8) | .bin „filepath“ |
| .odb | (byte) 1 byte each value and strings, object data block | .odb „hello“,0x3b |
| .odw | (word) 2 bytes each value, object data block. 9) | .odw 0x3bda,0xcf01 |
| .odt | (triple) 3 bytes each value, object data block. 10) | .odt 0xf0d1a4 |
| .odl | (long) 4 bytes each value, object data block. 11) | .odl 0xff01ddca |
| .obin | (file) data block from file byte-wise. 12) | .obin „filepath“ |
| .dobjend | endmark for object data block with .odb, .odw, … 13))) | .dobjend label |
classServiceudpdDatagram: .odb "this is a message from the luna udpd server",0x0D,0x0A .odb "build with lavrc version ","2013.r6.7",0x0D,0x0A .odb 0x0D,0x0A .dobjend classServiceudpdDatagram
Die Präprozessorfunktionen können nur mit Konstanten verwendet werden.