Motorola HC12 11.5 Splitting an Application into Different Modules

Operating Procedures

Splitting an Application into Different Modules

MCUez HC12 Assembler User’s Manual

MOTOROLA Operating Procedures 231

11.5 Splitting an Application into Different Modules

A complex application or application involving several programmers can be

split into several simple modules. In order to avoid any problem when merging

different modules, adhere to the following.

For each assembly source file, one include file must be created containing the

definition of the symbols exported from this module. For the symbols referring

to code label, a small description of the interface is required.

Example of assembly file (Test1.asm):

XDEF AddSource

XDEF Source

initStack:EQU $AFF

DataSec: SECTION

Source: DS.W 1

CodeSec: SECTION

AddSource:

ADD Source

STD Source

RTS

Corresponding include file (Test1.inc):

XREF AddSource

; The function AddSource adds the value stored in the variable

; Source to the content of register D. The result of the computation

; is stored in the variable Source.

;

; Input Parameter : register D contains the value, which should be

; added to the variable Source.

; Output Parameter: register D contains the result of the addition.

XREF Source

; The variable Source is a word variable.