UM0144 datasheet(23/92 Pages) STMICROELECTRONICS

23 / 92 page

ST7 Assembler Linker

3 ST7 Assembler

UM0144

23/92

In the preceding example, FILE1 and FILE2 are two separate modules belonging to the same

program. FILE1 introduces two classes: 'RAM0' and 'eprom'. The class-names may be any

names you choose up to 30 characters.

The first time a class is used—introduced—you have to declare the default alignment, the start

and the end addresses of the class, and of course, the name of the class.

Users generally specify a new class for each 'area' of their target system.

In the examples above, the user has one class for the 128 bytes of on-chip RAM from 0080 to

00FF

('RAM0') and another for the 'eprom'.

The code is stored from E000 to FFFF ('eprom'). You have to supply all this information the

very first time you use a new class, otherwise only the class-name is necessary, as in FILE2.

3.4.1

Parameters

The following paragraphs describe each argument in detail.

Name

The <name> argument is optional; it can contain a name of up to 12 characters. If it does, then

all segments with the same name are grouped together within their class, in the order that new

names are defined.

Align

The <align> argument defines the threshold on which each segment must start. The default

is the alignment specified at the introduction of the class (if none is specified in the class

introduction then para alignment is assumed), although the alignment types described in

Table 8 are allowed to be specified overriding the default.

FILE2:

st7/

segment ‘RAM0’

serialtemp

ds.b

serialcou

ds.b

WORDS

segment ‘eprom’

serial_in

ld A,#0

end

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