View Full Version : Pro Dev Board + BS2p40 + IR remote kit for BOE bot = CountStartPulse.bs2 code n

05-02-2007, 02:30 AM
i followed all the commands in the book and set it up identically, only difference is the chip is a bs2p40 vs. bs2. i ran a short program to see if the ir reciever was working, it is. but for some reason, the code that will read the remotesz ir using pulsin does not work? it doesnt seem to make sense to me.


Mike Green
05-02-2007, 02:37 AM
Many of the time-dependent commands of the Stamp have different timing on the various Stamp models including the serial I/O and the pulse input and output commands. There is such a difference between the BS2 and the BS2p40. Look in the PBasic manual under the command involved and you will find a table that shows the differences for different models.

The BS2 for example has a PULSIN granularity of 2us while the BS2p models (BS2p24 and BS2p40) have a granularity of 0.8us

05-02-2007, 02:56 AM
i looked that up, but was'nt quite sure how or where to make the needed changes to the software.

Units in Variable 0.8 s
Maximum pulse width 52.428 ms

i get lost when dealing with small numbers.

how do i find the right way of timing pulses?

Mike Green
05-02-2007, 09:49 AM
You need to describe what you're trying to do (in some detail), post your code and at least a description of your hardware and how it's connected.

The BS2p can accurately time pulses up to 52.428ms in width (to a resolution of about 0.8us). What's right depends on what you're trying to do and what you have available to do it.

05-03-2007, 02:45 AM
i decided to change the specs and i'm now using a homework board for the project. it seems to work fine.

Andy Lindsay (Parallax)
05-03-2007, 03:13 AM
Here are two links you may find useful. Both of them feature IrRemoteButtonDisplay.bs2, which has conditional compilation directives that make the code work with the BS2, BS2sx, BS2p,or BS2pe. All you'll have to do is update the $STAMP directive on line 7.

http://www.parallax.com/dl/docs/prod/compshop/IRremoteAppKit.pdf (http://www.parallax.com/dl/docs/prod/compshop/IRremoteAppKit.pdf)

Andy Lindsay

Education Department
Parallax, Inc.

05-03-2007, 08:58 PM
thank you, grand master stampers. your help is appreciated.