Remote-processing RPC-2350 Manual do Utilizador descarregar pdf (Página 17)

SAVING AND LINKING PROGRAMS CHAPTER 3

3-2

Where ‘program’ is 0 or 1 for 128K Flash or 0 to 7 for

512K Flash installed.

“SA VE” and “ SAVE 0" ar e the same . Both save to

program location 0.

Type in the following command for this example:

SAVE

CAM BASIC will compile the program , progr am the

EPROM, and verify its contents.

Compile...Write...Verify

The time it takes to do all of this depends upon the

length and complexity of the progr am. Gener ally, it w ill

be from 1 to 20 seconds. T he ready prom pt (> ) will

appear when the program has been successfully saved to

the EPROM . If the program does not write to the

EPROM, an error message will appear:

Fail @ xxxx

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

no way to recover it since both occupy the same space.

AUTORUNNING

The program stored using SAVE or SAV E 0 will

autorun. To autorun a program:

1. Make sure there is a program in EP ROM (from

above) stored by using SAVE or SAVE 0.

2. Make sure the autorun jumper W11 is installed.

If you push the reset button, the program should run. If

there are any errors, the program will stop (assuming

you have not trapped them with ON ERROR) and

display the error message.

PREVENTING AUTORUN

When troubleshooting or maintaining a program, it' s not

always convenient for an autoexec ute file to run. This is

especially true if the program has been configured to

ignore the < ESC> key. To prevent autorun, remove

jumper W11.

Later, if you wish to SAVE or LOAD a program,

reinstall this jumper. You may do so even if the power

is on and a program is running. Remember to discharge

any static electricity before installing or removing the

jumper.

Another way to prevent autorun is to remove the

signature bytes from Flash. This is done by writing

&FF ’s into Flash address 0 and 1, segment 8. Use the

following steps to do this.

dpoke &8000,&ffff

save 8,0,0,0,&8000,2

This will overwrite the first 128 to 256 bytes of code and

prevent autorun.

LOADING PROGRAMS

There are tim es when y ou may w ish to tempor arily

modify or otherwise test out a change to a program.

Since the program is loaded into RAM, modifications

can be made without affecting the program in EPROM.

If you find out that modifications are not desirable or did

not work, you can restore the original program to RAM

using the LOAD command.

This version of CAM BASIC can link and run 2

programs with a 128K or 8 with 512K flash. Because of

this linking ability, you should do some things during

development to limit problems. Before loading a new

program, enter the following com mand fir st:

new

If you are loading one pr ogram through F lash, saving it,

stopping, then loading another pr ogram and running it,

you may notice some oddities, like incorr ect variable

values or syntax errors to lines not in your code. This

oddity is probably due to the program size difference. If

you do not type in NEW to start with, LOA Ding w ill

clobber what is in m emory and nothing w ill be right.

If you are using multitasking routines, such as ON BIT

or ON TICK, then it is best to reset the board and then

load the program during development.

The other (and be st) way to take care of this problem is

to reset the board, then load the program.

Use LOAD 0 to retrieve programs saved using SAVE 0

or SAVE and use LOAD n to retrieve programs saved

using SAVE n. ‘n’ is 0 or 1 for 128K Flash and 0 to 7

for 512K.

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