Runtime PC serial connection
Archiver
Posts: 46,084
I need help. I put a BS2 in a wire wrap board, and it programs fine. I
can do serial in and out to the debug window. If I press reset, I get
my startup message from the BS2. If I try to connect using
Hyperterminal I get nothing from the BS2. If I pull the BS2 out of my
board and put it in the Board of Education it works fine, so the problem
is in my hardware. I have looked at the connection shown on page 275,
version 2.0 of the Basic Stamp manual have my DB-9 port wired as shown,
except for the 22k resister, being that I am using Rpin=16. Also, my
DB-9 pin 4 (DTR) is connected to ATN on the stamp.
What am I missing?
Thanks,
Dan Thames
[noparse][[/noparse]Non-text portions of this message have been removed]
can do serial in and out to the debug window. If I press reset, I get
my startup message from the BS2. If I try to connect using
Hyperterminal I get nothing from the BS2. If I pull the BS2 out of my
board and put it in the Board of Education it works fine, so the problem
is in my hardware. I have looked at the connection shown on page 275,
version 2.0 of the Basic Stamp manual have my DB-9 port wired as shown,
except for the 22k resister, being that I am using Rpin=16. Also, my
DB-9 pin 4 (DTR) is connected to ATN on the stamp.
What am I missing?
Thanks,
Dan Thames
[noparse][[/noparse]Non-text portions of this message have been removed]
Comments
with the ATN line and thus the Stamp thinks it's trying to be programmed and
is waiting for the download.
Try disconnecting the ATN line by inserting a couple of pins in series
with the ATN line and use a "configuration jumper" to open/close the ATN
line. (closed for programming, open for HyperTerm)
Again, I'm not 100% sure of this..
Mike B.
Original Message
From: "Dan Thames" <dthames@v...>
To: "Basic Stamps Group" <basicstamps@yahoogroups.com>
Sent: Sunday, October 27, 2002 8:09 PM
Subject: [noparse][[/noparse]basicstamps] Runtime PC serial connection
> I need help. I put a BS2 in a wire wrap board, and it programs fine. I
> can do serial in and out to the debug window. If I press reset, I get
> my startup message from the BS2. If I try to connect using
> Hyperterminal I get nothing from the BS2. If I pull the BS2 out of my
> board and put it in the Board of Education it works fine, so the problem
> is in my hardware. I have looked at the connection shown on page 275,
> version 2.0 of the Basic Stamp manual have my DB-9 port wired as shown,
> except for the 22k resister, being that I am using Rpin=16. Also, my
> DB-9 pin 4 (DTR) is connected to ATN on the stamp.
>
> What am I missing?
>
> Thanks,
> Dan Thames
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
> 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/
>
>
Yes you are correct I actually use a switch in my systems.
I use a 10K pull down resitor to hold the line down when it is not being
used
this helps reduce noise geting to the stamp.
and the data is getting to the PC. Digging deeper I found a circuit
example on the BS2-IC Module schematic drawing (Rev F.) that shows the
ATN line cap. coupled to the DTR line, and another cap. From the ATN to
ground. I can see that this is used on the B.O.E. also. I might try
that which would avoid the jumper for programming. The device I am
building will be inside a box and a programming jumper would be less
than ideal.
Thanks for the help,
Dan
>
Original Message
> From: Lawrence C. Windrem [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=VVeBxFfOBLe17FLhzVwNblzR7m4fVOE44gkfzUrzFz6GusFrf3N11sHyQvmUh-UBmrKZDZBzvOqtJMc]lwindrem@p...[/url
> Sent: Sunday, October 27, 2002 10:58 PM
> To: basicstamps@yahoogroups.com
> Subject: RE: [noparse][[/noparse]basicstamps] Runtime PC serial connection
>
>
>
> Hi
> Yes you are correct I actually use a switch in my
> systems.
> I use a 10K pull down resitor to hold the line down when
> it is not being
> used
> this helps reduce noise geting to the 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/
>