28125 Parallax Inc, 28125 Datasheet - Page 125

• Manufacturer Part Number: 28125
• Description: TEXT ROBOTICS
• Manufacturer: Parallax Inc

Specifications of 28125

• Title: Robotics with the Boe-Bot
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Not applicable / Not applicable

ACTIVITY #4: TESTING SPEED CONTROL WITH THE DEBUG TERMINAL
In this activity, you will graph servo speed vs. pulse width. One thing that can make this
process go much more quickly is the Debug Terminal’s Transmit windowpane, which is
shown in Figure 3-19. You can use the Transmit windowpane to send the BASIC Stamp
messages. By sending messages that tell the BASIC Stamp what pulse width to deliver to
the servo, you can test the servo speed at various pulse widths.
Windowpane
Windowpane
√
√
√
Transmit
Receive
Open HelloOnceEverySecond.bs2.
Copy
HelloOnceEverySecond.bs2 above the
Run the modified program and verify that it responds with a warning tone every
time the BASIC Stamp is reset (either by pressing and releasing the Reset button
on the board or disconnecting and reconnecting the battery supply).
An initialization routine is comprised of all the commands necessary to get a device or
program up and running. It often includes setting certain variable values, beeping noises,
and for more complex devices, self testing and calibration.
Pulse width is a common way to describe how long a pulse lasts. The reason it is called
pulse "width" is because the amount of time a pulse lasts is related to how wide it is on a
timing diagram. Pulses that last longer are wider on timing diagrams, and pulses that last
for short periods of time are narrow.
the
FREQOUT
command
DO…LOOP
from
section.
StartResetIndicator.bs2
Figure 3-19
Debug Terminal
Windowpanes
into