Parallax Boe-Bot Student Manual page 102

Page 88 · Robotics with the Boe-Bot
Solutions
Q1. Instead of holding a certain position like a standard servo, the Parallax
Continuous Rotation servos turn a certain direction at a certain speed.
Q2. A millisecond lasts one thousandth of a second. Millisecond is abbreviated
"ms".
Q3. The command is used to make other PBASIC commands execute over
DO...LOOP
and over.
Q4. connects I/O pin to Vdd,
HIGH
Q5. The variable sizes are bit, nib, byte, and word.
Bit – Stores 0 to 1
Nib – Stores 0 to 15
Byte – Stores 0 to 255
Word – Stores 0 to 65535 or -32768 to +32767
Q6. Pulse width controls servo speed and direction. As seen on a timing diagram, the
pulse width is the high time. In PBASIC, the pulse can be generated with the
command. The
PULSOUT
speed and direction.
E1.
PAUSE 10000
E2. The key to writing the variable declaration is to choose a variable size large
enough to hold the value 24. A Nib (nibble) will not work, since the maximum
value a Nib can store is 15. Therefore, choose a Byte variable.
counter VAR Byte
FOR counter = 6 TO 24 STEP 3
DEBUG ? counter
PAUSE 500
NEXT
P1. The key to solving this problem is to send a pulse train to the LED as well as the
servo.
' Robotics with the Boe-Bot - Ch02Prj01_DimlyLitLED.bs2
' Run servo and send same signal to the LED on P14,
' to make it light dimly.
'{$STAMP BS2}
'{$PBASIC 2.5}
DEBUG "Program Running!"
DO
connects I/O pin to Vss.
LOW
command's
PULSOUT Duration
argument adjusts the