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SAVING CODE AND DATA BASIC SECTION 3

Page 3-1

Figure 3-1 Flash EPROM location

INTRODUCTION

SAVING CODE AND DATA IN BASIC SECTION 3

Code and data are saved to external Flash at U6 only.

Some of the internal Flash/EE PROM to the ADUC 812

CPU is used when running RPBASIC-52. Contact

Remote Processing for more details. Data is usually

saved to the 512K RAM, but can be saved to Flash for

secure storage or when RAM is not enough.

One BASIC progr am can call another using the

EXEC UTE command.

Despite the fact you have a 512K RAM installed, the

maximum pr ogram size RPBA SIC-52 can run at one

time is about 60K (including r oom for some variable

storage). However, up to 7 programs can be chained.

Chained programs can run another program.

One program can call another using the EXECUTE n

command. n is from 1 to 7.

NOTE: When a program calls another, the old program

is completely replaced. All variables and

arrays are cleared (set to 0).

To keep variables, you m ust save them before calling the

new progr am. When the new program is running, these

variables may be restored. Use PEE K and POKE type

commands to read and save numbers and strings. See

SECTION 5, STORING VARIABLES IN RAM for more

information. The demonstration programs EXECn.BAS

show how a variable is stored in RAM.

A Flash EPROM is non-volatile (retaining data even

when power is disconnected), having an unlimited

number of read cycles and a limited number of write

cycles.

A program is not run fr om EPROM. It is transferred to

RAM and run from there. Programs in RAM can be

modified. They can be saved to E PRO M for auto

execution later.

NOTE: Starting sometime in 2012, the flash EPROM

type will change from the Atmel 29C040A to a

traditional flash. Saving and loading programs

will rem ain the same. H owever , any data

stored in the same segment as a program will

be erased when stor ing a new program. This is

important if storing m enu strings and constants

in the same flash segment as the program.

The RPC-210 can be set to autorun on power up or reset

by grounding J7-17 (usually to J7-15). When autorun is

on, the progr am in EPRO M segm ent 1 is loaded into

RAM and begins to execute immediately.

SAVING A PROGRAM

For this example, assume you wanted to save the

following program:

20 FOR N=0 TO 2

30 PRINT "Hello ",

40 NEXT

50 PRINT

If this progr am is not alr eady in, type it in now (or , if

you prefer, use your own program).

Type in the following command:

SAVE

RPBASIC-52 responds with:

Saving 35 bytes

-OK

The time it takes save a program depends upon the

length and complexity of the program and Flash EPROM

type. Programming rate is roughly 10000 bytes/second.

If the program is not successfully saved to EPROM, an

error message will appear.

Saving a program overw rites the pr evious one. Ther e is

no way to recover the old one since both occupy the

same space.

Using SAVE without any parameters is the same as

typing SAVE 1.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 59 60

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Remote-processing RPC-210 Manuel d'utilisateur Page 14

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