Serial LCD Controller Module
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Has anyone used the serial LCD Controller Module that is avalable
from www.wirz.com? If so, has it work with a Stamp?
Chris
from www.wirz.com? If so, has it work with a Stamp?
Chris
Comments
you-know-what. Sometimes they come on and work just fine, other times they
interpret a Stamp pin transition at power-up as a command and they go wonky.
*IF* you turn on the whole display after you set your Stamp pin, they will
work fine -- in other words you either need two power switches or a second
Stamp pin and a relay or transistor to switch on the display.
Original Message
> Has anyone used the serial LCD Controller Module that is avalable
> from www.wirz.com? If so, has it work with a Stamp?
of input from the Stamp can be confused on power up because the Stamp starts
with all inputs. The answer is to use a pull up or pull down resistor to set
the state of the pin to a known state at all times. Then the Stamp can
override that state when needed.
This is something we see all the time with our PAK-Vs. You can jumper them
to expect an RS-232 "space" to high or low. The input has a pull up
resistor, so setting it to high works best. However, if you set it to low,
the chip will "see" a spurious start bit when the Stamp starts (because of
the internal pull up). You just have to correctly pull the pin low or
adequately reset the PAK (which is always a good idea anyway).
Al Williams
AWC
* Control 8 servos at once
http://www.al-williams.com/awce/pak8.htm
>
Original Message
> From: Rodent [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=d3kfMoZL7upP9aCPV7EzNdpsLMss7Kohmfo_sxH0FBt3427MDRmvHu8n-XkcleE6iTOWQL1XFdBqcakjNT0]daweasel@s...[/url
> Sent: Wednesday, August 22, 2001 6:13 PM
> To: basicstamps@yahoogroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] Serial LCD Controller Module
>
>
> I think thats the same one Marlin P. Jones is selling, and its a piece of
> you-know-what. Sometimes they come on and work just fine, other times they
> interpret a Stamp pin transition at power-up as a command and
> they go wonky.
> *IF* you turn on the whole display after you set your Stamp pin, they will
> work fine -- in other words you either need two power switches or a second
> Stamp pin and a relay or transistor to switch on the display.
>
>
>
Original Message
>
>
> > Has anyone used the serial LCD Controller Module that is avalable
> > from www.wirz.com? If so, has it work with a Stamp?
>
>
>
>
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the Stamp pin a certain way and use an END statement, then load and run your
normal code, it seems to be a bit more reliable.
Original Message
> I like the SEETRON units. That being said, any device that expects some
sort
> of input from the Stamp can be confused on power up because the Stamp
starts
> with all inputs. The answer is to use a pull up or pull down resistor to
set
> the state of the pin to a known state at all times. Then the Stamp can
> override that state when needed.
>
> This is something we see all the time with our PAK-Vs. You can jumper them
> to expect an RS-232 "space" to high or low. The input has a pull up
> resistor, so setting it to high works best. However, if you set it to low,
> the chip will "see" a spurious start bit when the Stamp starts (because of
> the internal pull up). You just have to correctly pull the pin low or
> adequately reset the PAK (which is always a good idea anyway).
> >
Original Message
> > I think thats the same one Marlin P. Jones is selling, and its a piece
of
> > you-know-what. Sometimes they come on and work just fine, other times
they
> > interpret a Stamp pin transition at power-up as a command and
> > they go wonky.
> > *IF* you turn on the whole display after you set your Stamp pin, they
will
> > work fine -- in other words you either need two power switches or a
second
> > Stamp pin and a relay or transistor to switch on the display.
> >
> >
> >
Original Message
> >
> >
> > > Has anyone used the serial LCD Controller Module that is avalable
> > > from www.wirz.com? If so, has it work with a Stamp?
Stamp in a end mode, the watchdog timer times out every few seconds and this
causes the outputs to "float" for just a split second. The trick there is
not to stop your Stamp program. I think STOP does not do this, but I usually
just write:
halt: goto halt
This consumes power but doesn't wink out like an END. By standard computer
verb conjugation...
I code dynamic halts.
He/she codes endless loops.
:-)
Al Williams
AWC
* Floating point math for the Stamp, PIC, SX, or any microcontroller
http://www.al-williams.com/awce/pak1.htm
>
Original Message
> From: Rodent [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=oYwv2xojfF0oyO9X0WG0wY0wGO_wswoaqv81oY7cnNatLOKo48DVM8h9RDq8lQXCLlfQ8_RG2q1GTQ]daweasel@s...[/url
> Sent: Wednesday, August 22, 2001 8:57 PM
> To: basicstamps@yahoogroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] Serial LCD Controller Module
>
>
> Tried it -- doen't seem to work all the time. *IF* you run some
> code to set
> the Stamp pin a certain way and use an END statement, then load
> and run your
> normal code, it seems to be a bit more reliable.
>
>
Original Message
>
> > I like the SEETRON units. That being said, any device that expects some
> sort
> > of input from the Stamp can be confused on power up because the Stamp
> starts
> > with all inputs. The answer is to use a pull up or pull down resistor to
> set
> > the state of the pin to a known state at all times. Then the Stamp can
> > override that state when needed.
> >
> > This is something we see all the time with our PAK-Vs. You can
> jumper them
> > to expect an RS-232 "space" to high or low. The input has a pull up
> > resistor, so setting it to high works best. However, if you set
> it to low,
> > the chip will "see" a spurious start bit when the Stamp starts
> (because of
> > the internal pull up). You just have to correctly pull the pin low or
> > adequately reset the PAK (which is always a good idea anyway).
>
> > >
Original Message
>
> > > I think thats the same one Marlin P. Jones is selling, and its a piece
> of
> > > you-know-what. Sometimes they come on and work just fine, other times
> they
> > > interpret a Stamp pin transition at power-up as a command and
> > > they go wonky.
> > > *IF* you turn on the whole display after you set your Stamp pin, they
> will
> > > work fine -- in other words you either need two power switches or a
> second
> > > Stamp pin and a relay or transistor to switch on the display.
> > >
> > >
> > >
Original Message
> > >
> > >
> > > > Has anyone used the serial LCD Controller Module that is avalable
> > > > from www.wirz.com? If so, has it work with a Stamp?
>
>
>
>
>
> 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.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
> you-know-what. Sometimes they come on and work just fine, other times they
> interpret a Stamp pin transition at power-up as a command and they go wonky.
> *IF* you turn on the whole display after you set your Stamp pin, they will
work
> fine -- in other words you either need two power switches or a second Stamp
pin
> and a relay or transistor to switch on the display.
>
If you're looking for an economical and reliable serial LCD controller, have a
look at our Econo-LCD kit:
http://www.hvwtech.com/econo-lcd.htm
Mark Hillier, VE6HVW
President, HVW Technologies Inc.
Canadian Distributors of Parallax Products and other Neat Stuff
Tel: (403)-730-8603 Fax: (403)-730-8903
See our NEW BASIC Stamp Prototyping tools !
http://www.hvwtech.com/stampstack.htm