> --- In oopic@yahoogroups.com, Andrew Porrett <slicerwizard@...> wrote:
>
>> At 10:00 PM 8/1/2007, thetruth_as_i_seeit wrote:
>>
>>> I'm trying to receive data to my OOPic R through a serial port
>>> connected to a laptop. I want to use this data to control objects
>>>
>> >from the OOPic but, in order to do that, I need to convert the
>>
> string
>
>>> data that is coming from the serial port to numeric data.
>>>
>> It would help if you indicated exactly what "strings" you plan on
>> sending. I don't imagine you'll be sending single character
>>
> commands forever.
>
>>
>>> In C, there is a specific function for this called atoi, but I
>>>
> can't
>
>>> find anything like it in the OOPic manual.
>>>
>> There isn't anything like it. You'll have to roll your own.
>>
>>
>>
>>> Just in case anybody wants to see it, here is my code ...
>>>
>>> Dim A As New oDIO1
>>> Dim B as New oSerial
>>>
>>> Sub Main()
>>> A.IOLine = 8
>>> A.Direction = cvOutput
>>> B.Baud = cv9600
>>> B.Operate = cvTrue
>>> A = 0
>>> Do
>>> If B.Received = cvTrue then
>>> B.Value = B.value
>>>
>> I take it you're echoing the characters back to the PC here?
>>
>>
>>
>>> End If
>>> A = B
>>>
>> That will (sometimes) grab the NEXT character from the serial port
>> and put it in A.
>>
>>
>>
>>> Loop
>>> End Sub
>>>
>>> Obviously, this doesn't work because B is not a zero or one in a
>>> numerical sense, and what I am picking up is ASCI code ... in other
>>> words a whole bunch of zeros and ones.
>>>
>> You need to convert from ASCII characters to numeric values. You
>> need an atoi...
>>
>>
>>
>>> Any thoughts?
>>>
>> Sure. It looks like you want to send '0' or '1' to turn the DIO1
>>
> off or on.
>
>> a = 0
>> do
>> if b.received then
>> c = b // copy rcvd character to c (declare c as a byte
>>
> variable)
>
>> b = c // echo character back to PC
>>
>> // set a to zero or one
>>
>> a = c - 48 // '0' = ASCII code #48, '1' = ASCII code #49
>> end if
>> loop
>>
>>
>> You'll have to clean that up for whatever OOPic "language" you're
>> using (BASIC?)
>>
>> I imagine you'd like to do more than just toggle a single DIO1 - so
>> what's next?
>>
>>
>> ...Andy
>>
>>
>
>
> Thanks guys,
>
> Your answers were quite helpful. Believe it or not, I really DO just
> want to toggle a switch on and off via my PC LOL. In this case its a
> switch for a light on a moving object I'm trying to track. A webcam
> takes a picture with the light on and then off, and I use this
> information to track position, movement, etc. As long as the object
> moves slow enough, the oSerial object will work. Later on, I might
> have to get smarter (heaven forbid).
>
>
Using SCP you can send this string to the Oopic without having to use a
oSerial object:
\041J1N\A will switch the light ON
\041J0N\A will switch the light OFF
Where[\0] captures the USART port to receive SCP strings
Where [41J] is the address where A is positioned in the object list
on the Oopic
Where [1N] writes the value 1 to A
Where [0N] writes the value 0 to A
Where[\A] releases the USART port for other use.
Should you require to read the value of A then the following string will
return its value:
\041JM\A
Note that the address of the object is dependant on object type and
where it is positioned in your dimension list. Also for this to work all
you have to do is dimension A. No other code is required with respect to A.
If I may ask, what image processing software are you using? I use
RoboRealm with great success.
Ian
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