| Author |
Message |
Cuprager
Guest
|
 Posted:
Fri Dec 02, 2005 5:35 pm Post subject:
rs232 thermometer |
|
|
http://www.cs.unibo.it/~lanconel/webtherm.html
Has anyone made this before and got it to work?
The reason that i am asking is that this is my first EVER attempt at
making a circuit and guess what... it doesnt work!
I have tested the circuit using a volt meter and i get the correct
voltage at the chip (+5v) and all of the gnd points are, well grounded.
What i dont know is if it is something that i have messed up or the
software provided that is at fault! I have tried the software of a Linux
box and have tried the windows version too... both with the same board
and both with the same results... Err-14. Now i have checked the
suggested fixes for this error and none of them work.
Any help, ideas or suggestions? (other than hit it with a large hammer :o)
Thanks
Cuprager
|
|
| Back to top |
|
 |
James T. White
Guest
|
| Posted:
Fri Dec 02, 2005 5:35 pm Post subject:
Re: rs232 thermometer |
|
|
"Cuprager" <cuprager@replyinnews.please> wrote in message
news:dmpnea$i6g$1@dennis.cc.strath.ac.uk...
| Quote: | http://www.cs.unibo.it/~lanconel/webtherm.html
Has anyone made this before and got it to work?
The reason that i am asking is that this is my first EVER attempt at
making a circuit and guess what... it doesnt work!
I have tested the circuit using a volt meter and i get the correct
voltage at the chip (+5v) and all of the gnd points are, well
grounded.
What i dont know is if it is something that i have messed up or the
software provided that is at fault! I have tried the software of a
Linux
box and have tried the windows version too... both with the same board
and both with the same results... Err-14. Now i have checked the
suggested fixes for this error and none of them work.
Any help, ideas or suggestions? (other than hit it with a large hammer
:o)
|
I haven't actually built this, but looking at the schematic for the
hardware it should work if the software drives it correctly. While they
are using a serial port, it doesn't actually use the TXD/RXD lines since
the DS1621 is not an asynchronous device which makes troubleshooting
a bit more difficult.
Do you have access to an oscilloscope? If so, try monitoring the SCL
and SCA lines to see if you are getting reasonable signals to the
DS1621's. You might have to write some "disposable DOS code" to
repeatedly drive the signals from a tight loop so you can get the scope
to display something if you don't have access to a storage scope.
Good luck and let us know how it turns out.
--
James T. White |
|
| Back to top |
|
|
Cuprager
Guest
|
| Posted:
Fri Dec 02, 2005 5:35 pm Post subject:
Re: rs232 thermometer |
|
|
James T. White wrote:
| Quote: | "Cuprager" <cuprager@replyinnews.please> wrote in message
news:dmpnea$i6g$1@dennis.cc.strath.ac.uk...
http://www.cs.unibo.it/~lanconel/webtherm.html
Has anyone made this before and got it to work?
The reason that i am asking is that this is my first EVER attempt at
making a circuit and guess what... it doesnt work!
I have tested the circuit using a volt meter and i get the correct
voltage at the chip (+5v) and all of the gnd points are, well
grounded.
What i dont know is if it is something that i have messed up or the
software provided that is at fault! I have tried the software of a
Linux
box and have tried the windows version too... both with the same board
and both with the same results... Err-14. Now i have checked the
suggested fixes for this error and none of them work.
Any help, ideas or suggestions? (other than hit it with a large hammer
:o)
I haven't actually built this, but looking at the schematic for the
hardware it should work if the software drives it correctly. While they
are using a serial port, it doesn't actually use the TXD/RXD lines since
the DS1621 is not an asynchronous device which makes troubleshooting
a bit more difficult.
Do you have access to an oscilloscope? If so, try monitoring the SCL
and SCA lines to see if you are getting reasonable signals to the
DS1621's. You might have to write some "disposable DOS code" to
repeatedly drive the signals from a tight loop so you can get the scope
to display something if you don't have access to a storage scope.
Good luck and let us know how it turns out.
|
I know someone who has a scope, so that will be my next port of call...
I should get to see them next week some time. Thanks for your reply!
|
|
| Back to top |
|
|
petrus bitbyter
Guest
|
| Posted:
Sat Dec 03, 2005 1:35 am Post subject:
Re: rs232 thermometer |
|
|
"Cuprager" <cuprager@replyinnews.please> schreef in bericht
news:dmpnea$i6g$1@dennis.cc.strath.ac.uk...
| Quote: | http://www.cs.unibo.it/~lanconel/webtherm.html
Has anyone made this before and got it to work?
The reason that i am asking is that this is my first EVER attempt at
making a circuit and guess what... it doesnt work!
I have tested the circuit using a volt meter and i get the correct voltage
at the chip (+5v) and all of the gnd points are, well grounded.
What i dont know is if it is something that i have messed up or the
software provided that is at fault! I have tried the software of a Linux
box and have tried the windows version too... both with the same board and
both with the same results... Err-14. Now i have checked the suggested
fixes for this error and none of them work.
Any help, ideas or suggestions? (other than hit it with a large hammer :o)
Thanks
Cuprager
|
Yeah, but according to the webpage you mentioned Er-14 means: "Can't open
COM-port." So I guess you have a problem on the PC-side. Is the COM-port you
want to use known by your operating sytem? If not is it activated by the
BIOS? If it is known, is it in use by some other program or process?
Fiddling the hardware has no use as long as the software can't open the
COM-port that hardware has been connected to.
petrus bitbyter |
|
| Back to top |
|
|
Cuprager
Guest
|
| Posted:
Mon Dec 05, 2005 3:39 pm Post subject:
Re: rs232 thermometer |
|
|
petrus bitbyter wrote:
| Quote: | "Cuprager" <cuprager@replyinnews.please> schreef in bericht
news:dmpnea$i6g$1@dennis.cc.strath.ac.uk...
http://www.cs.unibo.it/~lanconel/webtherm.html
Has anyone made this before and got it to work?
The reason that i am asking is that this is my first EVER attempt at
making a circuit and guess what... it doesnt work!
I have tested the circuit using a volt meter and i get the correct voltage
at the chip (+5v) and all of the gnd points are, well grounded.
What i dont know is if it is something that i have messed up or the
software provided that is at fault! I have tried the software of a Linux
box and have tried the windows version too... both with the same board and
both with the same results... Err-14. Now i have checked the suggested
fixes for this error and none of them work.
Any help, ideas or suggestions? (other than hit it with a large hammer :o)
Thanks
Cuprager
Yeah, but according to the webpage you mentioned Er-14 means: "Can't open
COM-port." So I guess you have a problem on the PC-side. Is the COM-port you
want to use known by your operating sytem? If not is it activated by the
BIOS? If it is known, is it in use by some other program or process?
Fiddling the hardware has no use as long as the software can't open the
COM-port that hardware has been connected to.
petrus bitbyter
Thanks for your reply petrus, |
As i mentioned in my original post, i have checked the suggested fixes
for this error, including the COM port issue. I can open and use the COM
port using a different application. Also, when I connect the circuit
that i have made to the com port and run the software provided I can see
the Voltage changing at Vin from a -12v to a +12v. I get the same
results on two separate machines, one running XP and one running Linux.
I have given the circuit to a friend who is going to check it for errors
and analyse the output on a scope - like i said, i am new to this and
this is my first circuit, so i am unsure if i have made a mistake with
it or not! :o)
Best Regards |
|
| Back to top |
|
|
Cuprager
Guest
|
| Posted:
Tue Dec 06, 2005 5:35 pm Post subject:
Re: rs232 thermometer |
|
|
Cuprager wrote:
| Quote: | http://www.cs.unibo.it/~lanconel/webtherm.html
Has anyone made this before and got it to work?
The reason that i am asking is that this is my first EVER attempt at
making a circuit and guess what... it doesnt work!
I have tested the circuit using a volt meter and i get the correct
voltage at the chip (+5v) and all of the gnd points are, well grounded.
What i dont know is if it is something that i have messed up or the
software provided that is at fault! I have tried the software of a Linux
box and have tried the windows version too... both with the same board
and both with the same results... Err-14. Now i have checked the
suggested fixes for this error and none of them work.
Any help, ideas or suggestions? (other than hit it with a large hammer :o)
Thanks
Cuprager
|
UPDATE !!
I have made the circuit work! It was, a simple error, i had not broken
the track on the vero board under the diodes! now thats fixed it works a
treat... thanks for your advice. |
|
| Back to top |
|
|
|
|
|
|
FAQ
Memberlist
Register
Profile
Log in to check your private messages
Log in