Freeing P14 & P15
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Posts: 46,084
I noticed that on my BS2 OEM that P14 & P15 are also used by the
serial port. In my next project I need to use all 16 I/O where serial
communication is not needed during runtime. How can I free the last
two ports?
- Johari
serial port. In my next project I need to use all 16 I/O where serial
communication is not needed during runtime. How can I free the last
two ports?
- Johari
Comments
programs. If you want to use SERIN or SEROUT with the programming port,
you must specify pin 16. There is no actual IO pin 16, this just
redirects the software to use the programming port.
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: Johari Aziz [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=G9xLqAnoV77nS6OvATvKUk6id42lUbDqmwtiu2zsyzBhih2KJblA5eXNPyvfmUf2o6PTuLwPaSs]johaziz@y...[/url
Sent: Friday, January 02, 2004 1:38 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Freeing P14 & P15
I noticed that on my BS2 OEM that P14 & P15 are also used by the serial
port. In my next project I need to use all 16 I/O where serial
communication is not needed during runtime. How can I free the last two
ports?
- Johari
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what pins you're talking about. You might not want
to describe the OEM pins a 'P14 & P15'. It turns
out P14 and P15 are I/O pin keywords used in PBasic.
Both the BS2 and OEM have usable P14 and P15.
Instead, call them "Pin 14 and Pin 15". I believe
the pins used for the serial port are RA2 and RA3.
These are not mapped to PBasic P1..P15.
With the PBasic firmware, I don't think you can
remap these pins to be used for anything but the
'Port 16' SERIN/SEROUT and programming port.
--- In basicstamps@yahoogroups.com, "Johari Aziz" <johaziz@y...>
wrote:
> I noticed that on my BS2 OEM that P14 & P15 are also used by the
> serial port. In my next project I need to use all 16 I/O where
serial
> communication is not needed during runtime. How can I free the last
> two ports?
>
> - Johari
normally use that. I just had problem uploading the program if those
two pins are active and interconnected. I have many BS2s running at
the same time and used those two pins to comunicate with each other as
HIGH anf LOW status. I used PIN 14 as input and PIN 15 as output. eg.:
BS2 #1
outcom PIN 15
OUTPUT outcom
IsOn CON 1
IsOff CON 0
outcom = IsOn
BS2 #2
incom PIN 14
INPUT incom
IsOn CON 1
IsOff CON 0
DO
LOOP UNTIL incom = IsOn
The program works fine but I cannot reverse the situation. I can't
have PIN 14 as outcom and PIN 15 as incom. PIN 14 just refuse to go
HIGH. This makes me believe that PIN 14 and 15 are shared by other
function by the Bascic Stamp.
- Johari
--- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...> wrote:
> That is not correct, all IO pins are Stamp IO pins are avaiable for your
> programs. If you want to use SERIN or SEROUT with the programming port,
> you must specify pin 16. There is no actual IO pin 16, this just
> redirects the software to use the programming port.
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
>
>
>
Original Message
> From: Johari Aziz [noparse][[/noparse]mailto:johaziz@y...]
> Sent: Friday, January 02, 2004 1:38 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Freeing P14 & P15
>
>
> I noticed that on my BS2 OEM that P14 & P15 are also used by the serial
> port. In my next project I need to use all 16 I/O where serial
> communication is not needed during runtime. How can I free the last two
> ports?
>
> - Johari
>
>
> 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.
>
>
> Yahoo! Groups Links
>
> To visit your group on the web, go to:
> http://groups.yahoo.com/group/basicstamps/
>
> To unsubscribe from this group, send an email to:
> basicstamps-unsubscribe@yahoogroups.com
>
> Your use of Yahoo! Groups is subject to:
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>
>
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>
> This message has been scanned by WebShield. Please report SPAM to
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to make sure you haven't damaged your Stamp. Something easy like this:
Test:
HIGH 14
PAUSE 1000
LOW 14
HIGH 15
PAUSE 1000
LOW 15
GOTO Test
I was assisting a customer in their lab the other day and we found that
we had a bad pin on the Stamp. Once that was sorted out, the rest of
the day went easier.
-- Jon Williams
-- Parallax
Original Message
From: Johari Aziz [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=yCcEhjVpvN1KORHX-TGsO_u-wlnQ_rfyg542wYzk8GQdXSoKBOCN6iLRcS0M0FU0OLgxZmLt1g]johaziz@y...[/url
Sent: Friday, January 02, 2004 12:15 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Re: Freeing P14 & P15
Actually it is not much of a SERIN or SEROUT problem because I don't
normally use that. I just had problem uploading the program if those two
pins are active and interconnected. I have many BS2s running at the same
time and used those two pins to comunicate with each other as HIGH anf
LOW status. I used PIN 14 as input and PIN 15 as output. eg.:
BS2 #1
outcom PIN 15
OUTPUT outcom
IsOn CON 1
IsOff CON 0
outcom = IsOn
BS2 #2
incom PIN 14
INPUT incom
IsOn CON 1
IsOff CON 0
DO
LOOP UNTIL incom = IsOn
The program works fine but I cannot reverse the situation. I can't have
PIN 14 as outcom and PIN 15 as incom. PIN 14 just refuse to go HIGH.
This makes me believe that PIN 14 and 15 are shared by other function by
the Bascic Stamp.
- Johari
--- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
wrote:
> That is not correct, all IO pins are Stamp IO pins are avaiable for
> your programs. If you want to use SERIN or SEROUT with the
> programming port, you must specify pin 16. There is no actual IO pin
> 16, this just redirects the software to use the programming port.
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
>
>
>
Original Message
> From: Johari Aziz [noparse][[/noparse]mailto:johaziz@y...]
> Sent: Friday, January 02, 2004 1:38 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Freeing P14 & P15
>
>
> I noticed that on my BS2 OEM that P14 & P15 are also used by the
> serial port. In my next project I need to use all 16 I/O where serial
> communication is not needed during runtime. How can I free the last
> two ports?
>
> - Johari
>
>
> 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.
>
>
> Yahoo! Groups Links
>
> To visit your group on the web, go to:
> http://groups.yahoo.com/group/basicstamps/
>
> To unsubscribe from this group, send an email to:
> basicstamps-unsubscribe@yahoogroups.com
>
> Your use of Yahoo! Groups is subject to:
> http://docs.yahoo.com/info/terms/
>
>
>
>
> This message has been scanned by WebShield. Please report SPAM to
> abuse@p...
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signal other BS2 modules, you need to
be careful not to enable two drivers
on the same pin. The risk is if one
driver is outputting high while another
driver is outputting low. If there is
no resistance between the two pins,
you can easily burn out a driver on
one of the pins. This may have happened
to your P14.
A 220 resistor in series with the two
pins can reduce the current to the point
where it won't damage the pins.
In any event, P14 and P15 don't have
any other purpose on the BS2 than
general purpose I/O.
--- In basicstamps@yahoogroups.com, "Johari Aziz" <johaziz@y...>
wrote:
> Actually it is not much of a SERIN or SEROUT problem because I don't
> normally use that. I just had problem uploading the program if those
> two pins are active and interconnected. I have many BS2s running at
> the same time and used those two pins to comunicate with each other
as
> HIGH anf LOW status. I used PIN 14 as input and PIN 15 as output.
eg.:
>
> BS2 #1
>
>
> outcom PIN 15
> OUTPUT outcom
>
> IsOn CON 1
> IsOff CON 0
>
> outcom = IsOn
>
> BS2 #2
>
>
> incom PIN 14
> INPUT incom
>
> IsOn CON 1
> IsOff CON 0
>
> DO
> LOOP UNTIL incom = IsOn
>
> The program works fine but I cannot reverse the situation. I can't
> have PIN 14 as outcom and PIN 15 as incom. PIN 14 just refuse to go
> HIGH. This makes me believe that PIN 14 and 15 are shared by other
> function by the Bascic Stamp.
>
> - Johari
>
>
> --- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
wrote:
> > That is not correct, all IO pins are Stamp IO pins are avaiable
for your
> > programs. If you want to use SERIN or SEROUT with the
programming port,
> > you must specify pin 16. There is no actual IO pin 16, this just
> > redirects the software to use the programming port.
> >
> > -- Jon Williams
> > -- Applications Engineer, Parallax
> > -- Dallas Office
> >
> >
> >
Original Message
> > From: Johari Aziz [noparse][[/noparse]mailto:johaziz@y...]
> > Sent: Friday, January 02, 2004 1:38 AM
> > To: basicstamps@yahoogroups.com
> > Subject: [noparse][[/noparse]basicstamps] Freeing P14 & P15
> >
> >
> > I noticed that on my BS2 OEM that P14 & P15 are also used by the
serial
> > port. In my next project I need to use all 16 I/O where serial
> > communication is not needed during runtime. How can I free the
last two
> > ports?
> >
> > - Johari
> >
> >
> > 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.
> >
> >
> > Yahoo! Groups Links
> >
> > To visit your group on the web, go to:
> > http://groups.yahoo.com/group/basicstamps/
> >
> > To unsubscribe from this group, send an email to:
> > basicstamps-unsubscribe@yahoogroups.com
> >
> > Your use of Yahoo! Groups is subject to:
> > http://docs.yahoo.com/info/terms/
> >
> >
> >
> >
> > This message has been scanned by WebShield. Please report SPAM to
> > abuse@p...
have switched to other pins for that purpose, P3 & P4. They have pull
up and pull down resistors where it is necessary. All of them been
running fine for more than a month at location. This query is for a
future project that i may or may not use them.
- Johari
--- In basicstamps@yahoogroups.com, "Allan Lane" <allan.lane@h...> wrote:
> If you are using a couple of pins to
> signal other BS2 modules, you need to
> be careful not to enable two drivers
> on the same pin. The risk is if one
> driver is outputting high while another
> driver is outputting low. If there is
> no resistance between the two pins,
> you can easily burn out a driver on
> one of the pins. This may have happened
> to your P14.
>
> A 220 resistor in series with the two
> pins can reduce the current to the point
> where it won't damage the pins.
>
> In any event, P14 and P15 don't have
> any other purpose on the BS2 than
> general purpose I/O.
>
> --- In basicstamps@yahoogroups.com, "Johari Aziz" <johaziz@y...>
> wrote:
> > Actually it is not much of a SERIN or SEROUT problem because I don't
> > normally use that. I just had problem uploading the program if those
> > two pins are active and interconnected. I have many BS2s running at
> > the same time and used those two pins to comunicate with each other
> as
> > HIGH anf LOW status. I used PIN 14 as input and PIN 15 as output.
> eg.:
> >
> > BS2 #1
> >
> >
> > outcom PIN 15
> > OUTPUT outcom
> >
> > IsOn CON 1
> > IsOff CON 0
> >
> > outcom = IsOn
> >
> > BS2 #2
> >
> >
> > incom PIN 14
> > INPUT incom
> >
> > IsOn CON 1
> > IsOff CON 0
> >
> > DO
> > LOOP UNTIL incom = IsOn
> >
> > The program works fine but I cannot reverse the situation. I can't
> > have PIN 14 as outcom and PIN 15 as incom. PIN 14 just refuse to go
> > HIGH. This makes me believe that PIN 14 and 15 are shared by other
> > function by the Bascic Stamp.
> >
> > - Johari
> >
> >
> > --- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
> wrote:
> > > That is not correct, all IO pins are Stamp IO pins are avaiable
> for your
> > > programs. If you want to use SERIN or SEROUT with the
> programming port,
> > > you must specify pin 16. There is no actual IO pin 16, this just
> > > redirects the software to use the programming port.
> > >
> > > -- Jon Williams
> > > -- Applications Engineer, Parallax
> > > -- Dallas Office
> > >
> > >
> > >
Original Message
> > > From: Johari Aziz [noparse][[/noparse]mailto:johaziz@y...]
> > > Sent: Friday, January 02, 2004 1:38 AM
> > > To: basicstamps@yahoogroups.com
> > > Subject: [noparse][[/noparse]basicstamps] Freeing P14 & P15
> > >
> > >
> > > I noticed that on my BS2 OEM that P14 & P15 are also used by the
> serial
> > > port. In my next project I need to use all 16 I/O where serial
> > > communication is not needed during runtime. How can I free the
> last two
> > > ports?
> > >
> > > - Johari
> > >
> > >
> > > 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.
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > > To visit your group on the web, go to:
> > > http://groups.yahoo.com/group/basicstamps/
> > >
> > > To unsubscribe from this group, send an email to:
> > > basicstamps-unsubscribe@yahoogroups.com
> > >
> > > Your use of Yahoo! Groups is subject to:
> > > http://docs.yahoo.com/info/terms/
> > >
> > >
> > >
> > >
> > > This message has been scanned by WebShield. Please report SPAM to
> > > abuse@p...
to test or my Fluke. Since then I have switched to P3 & P5 and it
works fine.
- Johari
--- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...> wrote:
> No, they are not shared with anything else. Do a quick check with LEDs
> to make sure you haven't damaged your Stamp. Something easy like this:
>
> Test:
> HIGH 14
> PAUSE 1000
> LOW 14
> HIGH 15
> PAUSE 1000
> LOW 15
> GOTO Test
>
> I was assisting a customer in their lab the other day and we found that
> we had a bad pin on the Stamp. Once that was sorted out, the rest of
> the day went easier.
>
> -- Jon Williams
> -- Parallax
>
>
>
Original Message
> From: Johari Aziz [noparse][[/noparse]mailto:johaziz@y...]
> Sent: Friday, January 02, 2004 12:15 PM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Re: Freeing P14 & P15
>
>
> Actually it is not much of a SERIN or SEROUT problem because I don't
> normally use that. I just had problem uploading the program if those two
> pins are active and interconnected. I have many BS2s running at the same
> time and used those two pins to comunicate with each other as HIGH anf
> LOW status. I used PIN 14 as input and PIN 15 as output. eg.:
>
> BS2 #1
>
>
> outcom PIN 15
> OUTPUT outcom
>
> IsOn CON 1
> IsOff CON 0
>
> outcom = IsOn
>
> BS2 #2
>
>
> incom PIN 14
> INPUT incom
>
> IsOn CON 1
> IsOff CON 0
>
> DO
> LOOP UNTIL incom = IsOn
>
> The program works fine but I cannot reverse the situation. I can't have
> PIN 14 as outcom and PIN 15 as incom. PIN 14 just refuse to go HIGH.
> This makes me believe that PIN 14 and 15 are shared by other function by
> the Bascic Stamp.
>
> - Johari
>
>
> --- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
> wrote:
> > That is not correct, all IO pins are Stamp IO pins are avaiable for
> > your programs. If you want to use SERIN or SEROUT with the
> > programming port, you must specify pin 16. There is no actual IO pin
> > 16, this just redirects the software to use the programming port.
> >
> > -- Jon Williams
> > -- Applications Engineer, Parallax
> > -- Dallas Office
> >
> >
> >
Original Message
> > From: Johari Aziz [noparse][[/noparse]mailto:johaziz@y...]
> > Sent: Friday, January 02, 2004 1:38 AM
> > To: basicstamps@yahoogroups.com
> > Subject: [noparse][[/noparse]basicstamps] Freeing P14 & P15
> >
> >
> > I noticed that on my BS2 OEM that P14 & P15 are also used by the
> > serial port. In my next project I need to use all 16 I/O where serial
> > communication is not needed during runtime. How can I free the last
> > two ports?
> >
> > - Johari
> >
> >
> > 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.
> >
> >
> > Yahoo! Groups Links
> >
> > To visit your group on the web, go to:
> > http://groups.yahoo.com/group/basicstamps/
> >
> > To unsubscribe from this group, send an email to:
> > basicstamps-unsubscribe@yahoogroups.com
> >
> > Your use of Yahoo! Groups is subject to:
> > http://docs.yahoo.com/info/terms/
> >
> >
> >
> >
> > This message has been scanned by WebShield. Please report SPAM to
> > abuse@p...
>
>
> 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.
>
>
> Yahoo! Groups Links
>
> To visit your group on the web, go to:
> http://groups.yahoo.com/group/basicstamps/
>
> To unsubscribe from this group, send an email to:
> basicstamps-unsubscribe@yahoogroups.com
>
> Your use of Yahoo! Groups is subject to:
> http://docs.yahoo.com/info/terms/
>
>
>
>
> This message has been scanned by WebShield. Please report SPAM to
> abuse@p...
(minimum) resistor between two Stamps that are signaling each other.
It's easy -- even for us pros -- to make an error that causes the both
pins to be outputs and in the opposite state, usually blowing one pin or
the other.
-- Jon Williams
-- Parallax
Original Message
From: Johari Aziz [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=YBZt_dWqY_sYrdHhSb8xjUPb1FKoXqpDF27n_enW1UG-FNdatUu_JQTcJq-6B3ETl87iqgMqNNU]johaziz@y...[/url
Sent: Friday, January 02, 2004 7:20 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Re: Freeing P14 & P15
Actually all of my 6 unit BS2 responded the same way either using LED to
test or my Fluke. Since then I have switched to P3 & P5 and it works
fine.
- Johari
--- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
wrote:
> No, they are not shared with anything else. Do a quick check with
> LEDs to make sure you haven't damaged your Stamp. Something easy like
> this:
>
> Test:
> HIGH 14
> PAUSE 1000
> LOW 14
> HIGH 15
> PAUSE 1000
> LOW 15
> GOTO Test
>
> I was assisting a customer in their lab the other day and we found
> that we had a bad pin on the Stamp. Once that was sorted out, the
> rest of the day went easier.
>
> -- Jon Williams
> -- Parallax
>
>
>
Original Message
> From: Johari Aziz [noparse][[/noparse]mailto:johaziz@y...]
> Sent: Friday, January 02, 2004 12:15 PM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Re: Freeing P14 & P15
>
>
> Actually it is not much of a SERIN or SEROUT problem because I don't
> normally use that. I just had problem uploading the program if those
> two pins are active and interconnected. I have many BS2s running at
> the same time and used those two pins to comunicate with each other as
> HIGH anf LOW status. I used PIN 14 as input and PIN 15 as output. eg.:
>
> BS2 #1
>
>
> outcom PIN 15
> OUTPUT outcom
>
> IsOn CON 1
> IsOff CON 0
>
> outcom = IsOn
>
> BS2 #2
>
>
> incom PIN 14
> INPUT incom
>
> IsOn CON 1
> IsOff CON 0
>
> DO
> LOOP UNTIL incom = IsOn
>
> The program works fine but I cannot reverse the situation. I can't
> have PIN 14 as outcom and PIN 15 as incom. PIN 14 just refuse to go
> HIGH. This makes me believe that PIN 14 and 15 are shared by other
> function by the Bascic Stamp.
>
> - Johari
>
>
> --- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
> wrote:
> > That is not correct, all IO pins are Stamp IO pins are avaiable for
> > your programs. If you want to use SERIN or SEROUT with the
> > programming port, you must specify pin 16. There is no actual IO
pin
> > 16, this just redirects the software to use the programming port.
> >
> > -- Jon Williams
> > -- Applications Engineer, Parallax
> > -- Dallas Office
> >
> >
> >
Original Message
> > From: Johari Aziz [noparse][[/noparse]mailto:johaziz@y...]
> > Sent: Friday, January 02, 2004 1:38 AM
> > To: basicstamps@yahoogroups.com
> > Subject: [noparse][[/noparse]basicstamps] Freeing P14 & P15
> >
> >
> > I noticed that on my BS2 OEM that P14 & P15 are also used by the
> > serial port. In my next project I need to use all 16 I/O where
serial
> > communication is not needed during runtime. How can I free the last
> > two ports?
> >
> > - Johari
> >
> >
> > 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.
> >
> >
> > Yahoo! Groups Links
> >
> > To visit your group on the web, go to:
> > http://groups.yahoo.com/group/basicstamps/
> >
> > To unsubscribe from this group, send an email to:
> > basicstamps-unsubscribe@yahoogroups.com
> >
> > Your use of Yahoo! Groups is subject to:
> > http://docs.yahoo.com/info/terms/
> >
> >
> >
> >
> > This message has been scanned by WebShield. Please report SPAM to
> > abuse@p...
>
>
> To UNSUBSCRIBE, just send mail to:
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abuse@p....
because it is an outdoor installation and during the initial setup we
were using diesel driven power generators for one week. Then later we
had a direct tap from the mains. But yet I have to use a UPS to filter
the power. I only can do an 'autopsy' when the whole unit returns next
week.
- Johari
--- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...> wrote:
> As Allan pointed out in another post, it's a good idea to use a 220 ohm
> (minimum) resistor between two Stamps that are signaling each other.
> It's easy -- even for us pros -- to make an error that causes the both
> pins to be outputs and in the opposite state, usually blowing one pin or
> the other.
>
> -- Jon Williams
> -- Parallax
>
>
>
Original Message
> From: Johari Aziz [noparse][[/noparse]mailto:johaziz@y...]
> Sent: Friday, January 02, 2004 7:20 PM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Re: Freeing P14 & P15
>
>
> Actually all of my 6 unit BS2 responded the same way either using LED to
> test or my Fluke. Since then I have switched to P3 & P5 and it works
> fine.
>
> - Johari
>
> --- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
> wrote:
> > No, they are not shared with anything else. Do a quick check with
> > LEDs to make sure you haven't damaged your Stamp. Something easy like
>
> > this:
> >
> > Test:
> > HIGH 14
> > PAUSE 1000
> > LOW 14
> > HIGH 15
> > PAUSE 1000
> > LOW 15
> > GOTO Test
> >
> > I was assisting a customer in their lab the other day and we found
> > that we had a bad pin on the Stamp. Once that was sorted out, the
> > rest of the day went easier.
> >
> > -- Jon Williams
> > -- Parallax
> >
> >
> >
Original Message
> > From: Johari Aziz [noparse][[/noparse]mailto:johaziz@y...]
> > Sent: Friday, January 02, 2004 12:15 PM
> > To: basicstamps@yahoogroups.com
> > Subject: [noparse][[/noparse]basicstamps] Re: Freeing P14 & P15
> >
> >
> > Actually it is not much of a SERIN or SEROUT problem because I don't
> > normally use that. I just had problem uploading the program if those
> > two pins are active and interconnected. I have many BS2s running at
> > the same time and used those two pins to comunicate with each other as
>
> > HIGH anf LOW status. I used PIN 14 as input and PIN 15 as output. eg.:
> >
> > BS2 #1
> >
> >
> > outcom PIN 15
> > OUTPUT outcom
> >
> > IsOn CON 1
> > IsOff CON 0
> >
> > outcom = IsOn
> >
> > BS2 #2
> >
> >
> > incom PIN 14
> > INPUT incom
> >
> > IsOn CON 1
> > IsOff CON 0
> >
> > DO
> > LOOP UNTIL incom = IsOn
> >
> > The program works fine but I cannot reverse the situation. I can't
> > have PIN 14 as outcom and PIN 15 as incom. PIN 14 just refuse to go
> > HIGH. This makes me believe that PIN 14 and 15 are shared by other
> > function by the Bascic Stamp.
> >
> > - Johari
> >
> >
> > --- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
> > wrote:
> > > That is not correct, all IO pins are Stamp IO pins are avaiable for
> > > your programs. If you want to use SERIN or SEROUT with the
> > > programming port, you must specify pin 16. There is no actual IO
> pin
> > > 16, this just redirects the software to use the programming port.
> > >
> > > -- Jon Williams
> > > -- Applications Engineer, Parallax
> > > -- Dallas Office
> > >
> > >
> > >
Original Message
> > > From: Johari Aziz [noparse][[/noparse]mailto:johaziz@y...]
> > > Sent: Friday, January 02, 2004 1:38 AM
> > > To: basicstamps@yahoogroups.com
> > > Subject: [noparse][[/noparse]basicstamps] Freeing P14 & P15
> > >
> > >
> > > I noticed that on my BS2 OEM that P14 & P15 are also used by the
> > > serial port. In my next project I need to use all 16 I/O where
> serial
> > > communication is not needed during runtime. How can I free the last
> > > two ports?
> > >
> > > - Johari
> > >
> > >
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