27220 Parallax Inc, 27220 Datasheet - Page 39
27220
Manufacturer Part Number
27220
Description
BOOK STAMPWORKS
Manufacturer
Parallax Inc
Datasheet
1.27220.pdf
(230 pages)
Specifications of 27220
Accessory Type
Booklet
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Not applicable / Not applicable
For Use With/related Products
StampWorks
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Not applicable / Not applicable
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EXPERIMENT #2: FLASH AN LED (ADVANCED)
Now that we’ve got things moving, let’s step up a bit and explore an advanced
approach to flashing an LED. The method revealed in this experiment provides the
best in program readability and ease-of-maintenance.
Look It Up: PBASIC Elements to Know
Building the Circuit
This experiment uses the same circuit as Experiment #1.
Program: SW21-EX02-Flash_LED-Adv.BS2:
' {$STAMP BS2}
' {$PBASIC 2.5}
' -----[ Program Description ]---------------------------------------------
'
' Flashes an LED connected to P0.
' any BS2-family module.
' -----[ I/O Definitions ]-------------------------------------------------
Strobe
' -----[ Constants ]-------------------------------------------------------
IsOn
IsOff
FlashOn
FlashOff
' -----[ Initialization ]--------------------------------------------------
•
•
•
•
•
OUTPUT
DO-LOOP
VAR
Nib (variable type)
BIT0..BIT15 (variable modifier)
PIN
CON
CON
CON
CON
0
1
0
50
950
This program will work, unmodified, on
' LED on P0
' on for active-high LED
' off for active-high LED
' on for 50 ms
' off for 950 ms
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