Rabbit 2000 - Origin Directives to the Compiler

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20 Rabbit

2000

Microprocessor

CLONINGBAUDRATE

The

default

value

of

1

makes

cloning

happen

at

115,200

baud,

zero

makes

the

cloning

baud

rate

57,600.

DATAORG

Beginning

logical

address

for

the

data

segment.

The

default

is

0x6000.

This

should

only

be

changed

to

multiples

of

0x1000.

Increasing

it

increases

root

code

space

available,

and

decreases

root

data

space

and

decreases

total

xmem

space.

RAM_SIZE

This

macro

sets

the

amount

of

RAM

available.

The

default

value

is

the

internally

defined

_RAM_SIZE_ The

units

are

the

number

of

4k

pages

of

RAM.

In

special

situations,

such

as

splitting

RAM

between

two

coresident

programs,

this

may

be

modified

to

a

smaller

value

than

the

actual

available

RAM.

FLASH_SIZE

This

macro

sets

the

amount

of

flash

available.

The

default

value

is

the

internally

defined

_FLASH_SIZE_ The

units

are

the

number

of

4k

pages

of

flash.

In

special

situations,

such

as

splitting

flash

between

two

coresident

programs,

this

may

be

modified

to

a

smaller

value

than

the

actual

available

flash.

WATCHCODESIZE,WATCHDATASIZE

These

define

the

number

of

bytes

available

to

the

debugger

for

compiling

watch

expres-

sion.

The

default

value

for

both

is

0x400.

Decreasing

these

increases

the

amount

of

RAM

available

for

root

data.

NUM_RAM_WAITST, NUM_FLASH_WAITST

These

define

the

number

of

wait

states

to

be

used

for

RAM

and

flash.

The

default

value

for

both

is

0.

The

only

valid

values

are

4,

2,

1

and

0.

MB0CR_INVRT_A18,

MB1CR_INVRT_A18,

MB2CR_INVRT_A18,

MB3CR_INVRT_A18

MB0CR_INVRT_A19

,

MB1CR_INVRT_A19,

MB2CR_INVRT_A19,

MB3CR_INVRT_A19

These

determine

whether

the

MIU

registers

for

each

quadrant

are

set

up

to

invert

address

lines

A18

and

A19

after

the

logical

to

physical

address

conversion.

This

allows

each

256K

quadrant

of

physical

memory

access

up

to

four

256k

pages

on

the

actual

memory

device.

These

would

be

used

for

special

compilations

of

programs

to

be

coresident

on

flashes

between

512k

and

1M

in

size.

See

application

note

202,

Rabbit

Memory

Management

In

a

Nutshell,

and

application

note

204,

Page

Switching:

Running

Two

Application

on

One

Rabbit

Target,

for

more

details.

5.5

Origin

Directives

to

the

Compiler

Dynamic

C

contains

several

origin

directives

so

that

the

user

can

specify

different

memory

configurations

to

the

compiler.

The

compiler

uses

the

information

provided

by

the

origin

Table of Contents

Other manuals for Rabbit 2000

User Manual230 pages

Instruction & Reference Manual174 pages

Reference Manual120 pages

Getting Started Manual54 pages

Getting Started43 pages