Texas Instruments MSP-FET430 Macro Directives, Miscellaneous Directives, Preprocessor Directives

TI to IAR 2.x/3.x Assembler Migration

E.2.9	Macro Directives
Description		Asm430 Directive (TI)	A430 Directive (IAR)
Define a macro		.macro	MACRO
Exit prematurely from a macro		.mexit	EXITM
End macro definition		.endm	ENDM
Additional A430 Directives (IAR)			A430 Directive (IAR)
Create symbol, local to a macro			LOCAL 1)

1)In Asm430 local symbols are suffixed by a question mark (?).

E.2.10 Miscellaneous Directives

Description	Asm430 Directive (TI)	A430 Directive (IAR)
Send user-defined error messages to the	.emsg	#error
output device
Send user-defined messages to the output	.mmsg	#message 1)
device
Send user-defined warning messages to	.wmsg	2)
the output device
Define a load address label	.label	3)
Directive produced by absolute lister	.setsect	ASEG 4)
Directive produced by absolute lister	.setsym	EQU or = 4)
Program end	.end	END

1)The syntax of the #message directive is: #message “<string>”

This causes ‘#message <string>’ to be output to the project build window during assemble/compile time.

2)Warning messages cannot be user-defined. #message may be used, but the warning counter will not be incremented.

3)The concept of load-time addresses is not supported. Run-time and load-time addresses are assumed to be the same. To achieve the same effect, labels can be given absolute (run-time) addresses by the EQU directives.

; Asm430 code		; A430 code
.label	load_start	load_start:
Run_start:		<code>
<code>		load_end:
Run_end:		run_start:EQU	240H
.label	load_end	run_end: EQU	run_start+load_end-load_start

4)Although not produced by the absolute lister ASEG defines absolute segments and EQU can be used to define absolute symbols.

MYFLAG	EQU	23EH	; MYFLAG is located at 23E
	ASEG	240H	; Absolute segment at 240
MAIN:	MOV	#23CH, SP	; MAIN is located at 240
	...

Additional A430 Directives (IAR)	A430 Directive (IAR)
Set the default base of constants	RADIX
Enable case sensitivity	CASEON
Disable case sensitivity	CASEOFF

E.2.11 Preprocessor Directives

The A430 assembler includes a preprocessor similar to that used in C programming. The following preprocessor directives can be used in include files which are shared by assembly and C programs.

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