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Hi
I would like to understand why I read wrong numbers…….
A Phone is connected to the DTMF receiver 8870,
Q1-Q4 is connected to P0-P3 and I read the Numbers. So far it works fine,
and I can se the right numbers on the terminal.
I use:
Numbers var byte
But when I play for a while with the phone-buttons, after a while I read wrong numbers,
like: 240 but should be 2
I connected 4 LED to the Outputs Q1-Q4 to see the binary number,
and the binary numbers are always right.
…only 4 bit…. where the wrong numbers come from…
….. OK I solved it, but don’t understand it……
I changed:
“Numbers var byte” in “ Numbers var nib” and it is O.K
I believe:
the not used 00’s in the memory stay as 000‘s…???

If someone has time, and patience with so, may have a look at my code, I added partly.
I can not find the reason for the wrong Numbers, but would be interested to understand.
Heinz


In my code:
if in"eleven" = 1 then HighLoop 'loop till DTMF-Ton is finish
If i write eleven as number 11
then there is an web page ERROR at basicmicro.net:

Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, webmaster@forums.basicmicro.net and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Apache/2.2.15 (Unix) mod_ssl/2.2.15 OpenSSL/0.9.7a mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 PHP/5.2.13 Server at forums.basicmicro.net Port 80

Hard to say. The only thing that changed number is to set it to zero... Probably something in your function CollectNumbers?

Hi Kurt
Oh you are very quick..!!
did you see my topic when I finished it ?
Because of an web Page Error I had to edit the topic several times.
My be you did not see my collectNumbers subroutine..?
Heinz

My guess is the issues is that I believe: INL
returns 8 bits of data for P0-P7, so I am not sure what is connected to the other 4 pins or the like. In cases like this I will normally always simply do something like:
Number = INL & 0xf ' Only use the bits you are interested in...

Kurt

If you still haven't fixed it, add a 10ms pause
pause 10
Before and after serial commands.
I don't know why, but when i have a small pause before and after serial commands it cleans up a lot of signal problems.
The 10 ms pause should be short enough not to get in the way either.

Though i'm not 100% sure i understand the problem.

Is it that the nano is reading the wrong numbers, or transmitting the wrong numbers?

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If you need 4 bits of a port you can use the nib variables instead of the byte variable. INA is P0 to P3.

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