27404 Parallax Inc, 27404 Datasheet - Page 121

• Manufacturer Part Number: 27404
• Description: COMPETITION RING FOR SUMOBOT
• Manufacturer: Parallax Inc

Specifications of 27404

• Accessory Type: Hobby and Education
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: SumoBot®
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

Your Turn - Active High vs. Active Low
At present, the alert for the SumoBot encountering the white tawara line is when either
qtiStateLeft
change this so that the
ACTIVITY #5: ADDING AND TESTING SENSORS AND INDICATORS
Figure 3-16 shows the SumoBot with IR object detectors added to the breadboard that
will detect opponents on the side. The next activity adds and tests these sensors.
√
√
√
Use the invert bits operator, the tilde ~, to invert the states of the
names before storing them in the
to
Update the
being equal to zero. They need to check for the
to 1.
Save, run and test your modified program.
qtiStateLeft
qtiStateRight = qtiSigRight
qtiStateLeft
qtiStateRight = ~ qtiSigRight
or
qtiStateRight
IF...THEN
qtiState
= qtiSigLeft
= ~ qtiSigLeft
variables store 1 when they see they see white.
statements that are checking for
store 0. You can use the invert bits operator (~) to
qtiState
variables. In other words, change:
qtiState
variables being equal
qtiState
qtiSig PIN
variables