eeprom

Archiver · 2001-02-20 02:13

does anyone know how to clear the eeprom of a bs2 chip?
thank you for your time..
~Rich

Archiver · 2001-02-20 05:21

'Example
lastbytetoclear var word '2047 is last byte, but program will crash
anyway once the routine clears program data.

counter var word
for counter = 0 to lastbytetoclear
write counter, 0
next
end

'regards, Chris

Original Message

From: <oneuptick@e...>
To: <basicstamps@yahoogroups.com>
Sent: Tuesday, February 20, 2001 10:13 AM
Subject: [noparse][[/noparse]basicstamps] eeprom

> does anyone know how to clear the eeprom of a bs2 chip?
> thank you for your time..
> ~Rich
>
>
>
>

Archiver · 2001-02-20 15:59

thank you for your help

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Archiver · 2001-02-20 15:59

thank you for your help

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Reserve your name now at http://www.email.com

Archiver · 2002-04-14 04:11

I am trying to read a four bit value stored in eeprom and place into the
first 4 or 8 outputs. Any ideas about why the following doesn't work?

Thanks for your help..

Leroy

'{$STAMP BS2}
'Write the values to EEPROM.

CHARACTER var byte
x var nib

Data "BetsywasaGoodOlegirl"

for x = 0 to 20

READ x, CHARACTER

outa = CHARACTER

pause 2000

outa = 0

debug bin CHARACTER

debug " :", dec x

debug CR

next

Archiver · 2002-04-14 04:36

You need to initialize the outputs. If you're just using four bits, do this:

DirA = %1111

... or for eight bits:

DirL = %11111111

-- Jon Williams
-- Parallax

In a message dated 4/13/02 10:12:05 PM Central Daylight Time, leroy@f...
writes:

> I am trying to read a four bit value stored in eeprom and place into the
> first 4 or 8 outputs. Any ideas about why the following doesn't work?
>
> Thanks for your help..
>
> Leroy
>
> '{$STAMP BS2}
> 'Write the values to EEPROM.
>
> CHARACTER var byte
> x var nib
>
> Data "BetsywasaGoodOlegirl"
>
> for x = 0 to 20
>
> READ x, CHARACTER
>
> outa = CHARACTER
>
> pause 2000
>
> outa = 0
>
> debug bin CHARACTER
>
> debug " :", dec x
>
> debug CR
>
>
> next
>

[noparse][[/noparse]Non-text portions of this message have been removed]

Archiver · 2002-04-14 05:12

> > x var nib
> > Data "BetsywasaGoodOlegirl"
> > for x = 0 to 20

Also x needs to be a byte if it is to go above 15

>You need to initialize the outputs. If you're just using four bits, do this:
>DirA = %1111
>... or for eight bits:
>DirL = %11111111
>-- Jon Williams
>-- Parallax
>
>In a message dated 4/13/02 10:12:05 PM Central Daylight Time, leroy@f...
>writes:
> > I am trying to read a four bit value stored in eeprom and place into the
> > first 4 or 8 outputs. Any ideas about why the following doesn't work?
> > Thanks for your help..
> > Leroy
> >
> > '{$STAMP BS2}
> > 'Write the values to EEPROM.
> >> CHARACTER var byte
> > x var nib
> > Data "BetsywasaGoodOlegirl"
> > for x = 0 to 20
> > READ x, CHARACTER
> > outa = CHARACTER
> > pause 2000
> > outa = 0
> > debug bin CHARACTER
> > debug " :", dec x
> > debug CR
> > next

Archiver · 2002-04-14 16:06

So if I write:

'for x = 1 to 20'

the compiler assumes decimal, not hex?

And if I wanted to write the values as a hex number I would write what ?

Also the statement: Data "BetsywasaGoodOlegirl" places number patterns
in the eeprom. Could I specify those patters in binary? Also, what is
the size limitataion of the eprom for this type of storage?

thanks so much for help. I am sure these questions are in the manual,
somewhere, I just don't know where they are..

Leroy

Tracy Allen wrote:
>
> > > x var nib
> > > Data "BetsywasaGoodOlegirl"
> > > for x = 0 to 20
>
> Also x needs to be a byte if it is to go above 15
>
> >You need to initialize the outputs. If you're just using four bits, do this:
> >DirA = %1111
> >... or for eight bits:
> >DirL = %11111111
> >-- Jon Williams
> >-- Parallax
> >
> >In a message dated 4/13/02 10:12:05 PM Central Daylight Time, leroy@f...
> >writes:
> > > I am trying to read a four bit value stored in eeprom and place into the
> > > first 4 or 8 outputs. Any ideas about why the following doesn't work?
> > > Thanks for your help..
> > > Leroy
> > >
> > > '{$STAMP BS2}
> > > 'Write the values to EEPROM.
> > >> CHARACTER var byte
> > > x var nib
> > > Data "BetsywasaGoodOlegirl"
> > > for x = 0 to 20
> > > READ x, CHARACTER
> > > outa = CHARACTER
> > > pause 2000
> > > outa = 0
> > > debug bin CHARACTER
> > > debug " :", dec x
> > > debug CR
> > > next
>
> To UNSUBSCRIBE, just send mail to:
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of the message will be ignored.
>
>
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Archiver · 2002-04-14 16:55

>So if I write:
>
>'for x = 1 to 20'
>
>the compiler assumes decimal, not hex?

Yes, it is always decimal, unless you specify $20 for hex.
x has to be defined as a byte in either case, because a nib can only
hold values up to 15, $0f.

>And if I wanted to write the values as a hex number I would write what ?
>
>Also the statement: Data "BetsywasaGoodOlegirl" places number patterns
>in the eeprom. Could I specify those patters in binary? Also, what is
>the size limitataion of the eprom for this type of storage?

Any of the following puts exactly the same numeric values in memory:
Data 66,101,116,115,121,....

Data $43,$65,$74,$73,$79,.. ' represented as hex

Data %01000010,%01100101,%01110100,%01110011,%01111001,... ' binary

>thanks so much for help. I am sure these questions are in the manual,
>somewhere, I just don't know where they are..

They are in the introductory section where it talks about variables,
and also (in the version 2.x manual) in the command reference under
"DATA" (but not under "RTFM"!).

-- regards,
Tracy Allen
electronically monitored ecosystems
mailto:tracy@e...
http://www.emesystems.com

>Leroy
>
>Tracy Allen wrote:
> >
> > > > x var nib
> > > > Data "BetsywasaGoodOlegirl"
> > > > for x = 0 to 20
> >
> > Also x needs to be a byte if it is to go above 15
> >
> > >You need to initialize the outputs. If you're just using four
>bits, do this:
> > >DirA = %1111
> > >... or for eight bits:
> > >DirL = %11111111
> > >-- Jon Williams
> > >-- Parallax
> > >
> > >In a message dated 4/13/02 10:12:05 PM Central Daylight Time,
>leroy@f...
> > >writes:
> > > > I am trying to read a four bit value stored in eeprom and
>place into the
> > > > first 4 or 8 outputs. Any ideas about why the following doesn't work?
> > > > Thanks for your help..
> > > > Leroy
> > > >
> > > > '{$STAMP BS2}
> > > > 'Write the values to EEPROM.
> > > >> CHARACTER var byte
> > > > x var nib
> > > > Data "BetsywasaGoodOlegirl"
> > > > for x = 0 to 20
> > > > READ x, CHARACTER
> > > > outa = CHARACTER
> > > > pause 2000
> > > > outa = 0
> > > > debug bin CHARACTER
> > > > debug " :", dec x
> > > > debug CR
> > > > next
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the
>Subject and Body of the message will be ignored.

Archiver · 2003-06-25 07:55

has anyone actually downloaded enough times to the eeprom on the basic
stamp to make it stop working? the manual says its like 10e6 or something
bwahahaha...?

eeprom

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