electromagnetic fields erasing programs?
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Hi folks,
I´m using a stamp 2sx in a project and in some cases it erases
partially or totally the program after some time. I already checked
the supply quality and I/O pins, no noise, no spikes. I already
checked the program, no loops or constant eeprom recordings. Do
somebody already faced the same problem? Someone knows were may I
found some info about sensitivity of the eeprom for eletric fields?
thanks in advance
Luiz Alberto - Brazil
feijojr@h...
I´m using a stamp 2sx in a project and in some cases it erases
partially or totally the program after some time. I already checked
the supply quality and I/O pins, no noise, no spikes. I already
checked the program, no loops or constant eeprom recordings. Do
somebody already faced the same problem? Someone knows were may I
found some info about sensitivity of the eeprom for eletric fields?
thanks in advance
Luiz Alberto - Brazil
feijojr@h...
Comments
When I have a roomfull (8 - 10) Lego Mindstorm
programming 'bricks' in use - we DO get program
erasure caused by cell-phone signals.
If we keep all cell phones out of the room - then no problem.
When someone walks into the room, and one of the
cpu's quits working right, that student will yell
at the intruder to 'Get that cell-phone outa
here!)
The problem probably arises from having fairly
long unshielded wires running to sensors and
motors.
Cell phone wavelengths would certainly to use these 6" wires as antennas.
IS it possible for a micro-processor to get
scrambled in this way? Not permanently fried,
just scrambled.
At 8:05 PM +0000 6/15/04, feijojr1 wrote:
>I´m using a stamp 2sx in a project and in some cases it erases
>partially or totally the program after some time. I already checked
>the supply quality and I/O pins, no noise, no spikes. I already
>checked the program, no loops or constant eeprom recordings. Do
>somebody already faced the same problem?
--
I never teach my pupils; I only attempt to
provide the conditions in which they can learn.
- Albert Einstein
I could understand that while you were programming it, that noise on your
programming lines could cause issues....
But noise on a sensor line would just give you garbage more times than
not....no?
Original Message
From: "Chuck Britton" <britton@a...>
To: "feijojr1" <feijojr1@y...>; <basicstamps@yahoogroups.com>
Sent: Sunday, July 04, 2004 10:33 PM
Subject: Re: [noparse][[/noparse]basicstamps] electromagnetic fields erasing programs?
This may (or may not) relate to your problem.
When I have a roomfull (8 - 10) Lego Mindstorm
programming 'bricks' in use - we DO get program
erasure caused by cell-phone signals.
If we keep all cell phones out of the room - then no problem.
When someone walks into the room, and one of the
cpu's quits working right, that student will yell
at the intruder to 'Get that cell-phone outa
here!)
The problem probably arises from having fairly
long unshielded wires running to sensors and
motors.
Cell phone wavelengths would certainly to use these 6" wires as antennas.
IS it possible for a micro-processor to get
scrambled in this way? Not permanently fried,
just scrambled.
At 8:05 PM +0000 6/15/04, feijojr1 wrote:
>I´m using a stamp 2sx in a project and in some cases it erases
>partially or totally the program after some time. I already checked
>the supply quality and I/O pins, no noise, no spikes. I already
>checked the program, no loops or constant eeprom recordings. Do
>somebody already faced the same problem?
--
I never teach my pupils; I only attempt to
provide the conditions in which they can learn.
- Albert Einstein
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These babies are programmed via their IR port.
Might the IR port wiring be picking it up?
At 6:55 AM -0400 7/5/04, SB wrote:
>would it do it in it's operating state....
>I could understand that while you were programming it, that noise on your
>programming lines could cause issues....
>But noise on a sensor line would just give you garbage more times than
>not....no?
--
I never teach my pupils; I only attempt to provide the conditions in
which they can learn.
- Albert Einstein