Re: [oopic] Another question about serial input to the ooPIC

I have the same hardware and the same question.

The spec sheet for this RFID reader can be found at
http://www.parallax.com/Store/Microcontrollers/BASICStampModules/tabid/134/txtSearch/28140/List/1/ProductID/114/Default.aspx?SortField=ProductName%2cProductName

If anyone knows how to interface this with the OOPic, it would be greatly
appreciated.

barichards21 wrote:
>
> Hi,
>
> I'm pretty new to using this ooPIC and what I'm trying to do is
> probably simple but I just can't figure it out. I have a Parallax
> RFID Reader module that, when enabled by an active low signal, sends
> the RFID back through a serial out on the reader.
>
> I have read through any discussion I could find on these boards. I
> know I need to user an oSerialPort object, with an oDIO1 object as
> some sort of flow control and another oDIO1 object as the active low
> enable. I'm only worried about serial input to the ooPIC (pin 23). I
> don't even really understand how the flow control works as shown in
> the sample code for the oSerialPort object. (I don't even understand
> what linking them together does exactly).
>
> The RFID reader sends back 12-bytes of information (1 start byte, 10
> bytes of data, and 1 stop byte). For my application, all 10 data
> bytes will be the same, so I'm only concerned with reading one of the
> data bytes. I know there is only a 4-byte buffer with the oSerialPort
> object and I don't know what will happen when it keeps getting bytes
> of data after the buffer is full.
>
> What I want to do is have a method in my code that will return the
> first data-byte that was received when enabling my RFID Reader. Will
> receiving more than 4 bytes through the serial start overwriting the
> bytes in the buffer, or even worse, mess up the data completely? If
> so, is there any way to make it stop putting anything in the buffer
> after a certain point?
>
> I know some of this may be obvious to some people, but I'm pretty new
> with the ooPIC and with serial communication.
>
> Thanks in advance for any help.
>
> Blake Richardson
> Tennessee Tech University
> barichards21@tntech.edu
>
>
>

--
View this message in context: http://www.nabble.com/Another-question-about-serial-input-to-the-ooPIC-tp13940947p15024158.html
Sent from the OOPic mailing list archive at Nabble.com.

Yahoo! Groups Links

<*> To visit your group on the web, go to:

http://groups.yahoo.com/group/oopic/

<*> Your email settings:
Individual Email | Traditional

<*> To change settings online go to:

http://groups.yahoo.com/group/oopic/join

(Yahoo! ID required)

<*> To change settings via email:
mailto:oopic-digest@yahoogroups.com
mailto:oopic-fullfeatured@yahoogroups.com

<*> To unsubscribe from this group, send an email to:
oopic-unsubscribe@yahoogroups.com

<*> Your use of Yahoo! Groups is subject to:

http://docs.yahoo.com/info/terms/