27220 Parallax Inc, 27220 Datasheet - Page 108
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
- Current page: 108 of 230
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EXPERIMENT #15: COUNTING EVENTS
This experiment demonstrates an events-based program delay.
Look It Up: PBASIC Elements to Know
Building the Circuit
Program: SW21-EX15-Event_Count.BS2
' {$STAMP BS2}
' {$PBASIC 2.5}
' -----[ Program Description ]---------------------------------------------
'
' Counts extenal events by wait for a low-to-high transition on the event
' input pin.
' -----[ I/O Definitions ]-------------------------------------------------
EventIn
' -----[ Variables ]-------------------------------------------------------
nScan
oScan
xScan
eCount
target
' -----[ Initialization ]--------------------------------------------------
Reset:
•
CLS, CR, CRSRXY (used with DEBUG)
PIN
VAR
VAR
VAR
VAR
VAR
15
Bit
Bit
Bit
Word
Word
' event input pin
' new scan (changed)
' old scan of input
' scan change
' event count
' target count value
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