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In article <39DA1F0C.E321A6EE@akasa.bc.ca>, Dean Husby
<nntp@akasa.bc.ca> wrote:
>
> Dave, I have a question about the datalog. In the manual you state that
> the
> createdatalog function creates a datalog of x many points. How much is a
> point? Is that how many unique entries can be made or an overall 'byte'
> amount? Is a value like 4 or 123456 equal as a single entry?
Each call to AddToDatalog() uses up one "point". Each point takes up 3
bytes of memory: a 1-byte code for the source of point (sensor, timer,
etc), then a 2-byte value.
123456 is too big to fit into the log. This would either generate a
compiler error for constant overflow, or just be truncated to a 16 bit
signed value (-7616).
>
> One last issue, with the RCX you can set up the IR port as a serial
> protocol. 2400 baud etc... But I don't see any way of receiving this info
> with another RCX. Is this for RCX -> PC only?
I couldn't find any way to Rx either. It still could be useful in
RCX-RCX communication, though, provided you use the default serial and
packet settings. This allows you to create a custom RCX packet (using
the normal RCX bytecodes), so you could remotely cause the other RCX to
do just about anything. Send it a "motor on" packet to turn on motors,
etc. More flexible than the basic "message" communication.
Dave
--
reply to: dbaum at enteract dot com
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Message has 1 Reply:
 | | Re: The datalog
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| BTW, what does the datalog *store*? Numbers? Events? Anything? And what good is it for (besides the methods we've disscussed earlier)? --Tobias (...) (24 years ago, 4-Oct-00, to lugnet.robotics.rcx.nqc)
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Message is in Reply To:
| | Re: The datalog
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| (...) Dave, I have a question about the datalog. In the manual you state that the createdatalog function creates a datalog of x many points. How much is a point? Is that how many unique entries can be made or an overall 'byte' amount? Is a value (...) (24 years ago, 3-Oct-00, to lugnet.robotics.rcx.nqc)
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