Another question on SEROUT/SERIN

holely

Hi all,

I am doing a race management system project, and it requires the system to be able to detect the rankings of each car. Hence I came up with the following simple test programs.

For the host BS2sx, the program is as follows:
=======================
' {$STAMP BS2sx}
com VAR Byte
check:
SERIN 1, 17405, [noparse][[/noparse]com]
IF com=230 THEN l1
IF com=231 THEN l2
GOTO check
l1:
DEBUG "1"
GOTO check
l2:
DEBUG "2"
GOTO check

For lane 1:
=======================
' {$STAMP BS2}
lapin VAR IN7
WAIT1:
IF lapin=1 THEN out
GOTO WAIT1
out:
SEROUT 1, 16780, [noparse][[/noparse]230]
GOTO wait1

For lane 2:
=======================
' {$STAMP BS2}
lapin VAR IN6
WAIT1:
IF lapin=1 THEN out
GOTO WAIT1
out:
SEROUT 1, 16780, [noparse][[/noparse]231]
GOTO wait1



The problem is after the first car(for e.g., lane 1 passes first), "1" is being debugged. Even though lane 2 passes subsequently, "2" is not being debugged.

What could be the problem?

Thanks in advance for any reply.

Jon Williams

You will very likely run into data collisions with this kind of system. Probably better that you put a group of sensors on the tracks that you can monitor with the master Stamp to look for changes.

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Jon Williams
Applications Engineer, Parallax
Dallas, TX· USA