COUNT - BASIC Stamp Command Reference
Page 90
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BASIC Stamp Programming Manual 2.0b
•
www.parallaxinc.com
If you use COUNT on slowly changing analog waveforms like sine waves,
you may find that the value returned is higher than expected. This is
because the waveform may pass through the BASIC Stamp’s 1.4-volt logic
threshold slowly enough that noise causes false counts. You can fix this by
passing the signal through a Schmitt Trigger, like one of the inverters of a
74HCT14.
Demo Program (COUNT.bs2)
Connect the active-low circuit shown in Figure 5.1 (BUTTON instruction) to pin P0 of the BS2.
The Debug screen will prompt you to press the button as quickly as possible for a 1-second
count. When the count is done, the screen will display your “score,” the total number of
cycles registered by COUNT. Note that this score will almost always be greater than the
actual number of presses because of switch bounce.
'{$STAMP BS2} ‘STAMP directive (specifies a BS2)
Cycles var word ' Variable to store counted cycles.
Loop:
DEBUG cls,"How many times can you press the button in 1 second?",cr
PAUSE 1000
DEBUG "Ready, set... "
PAUSE 500
DEBUG "GO!",cr
COUNT 0,1000,Cycles
DEBUG cr,"Your score: ", DEC Cycles,cr
PAUSE 3000
DEBUG "Press button to go again."
Hold:
IF IN0 = 1 THEN Hold
GOTO Loop
2
e
2
sx
2
p
2
NOTE: This is written for the BS2
but can be used for the BS2e,
BS2sx and BS2p also (with
modifications). Locate the proper
source code file or modify the
STAMP directive and the period of
the COUNT command before
downloading to the BS2e, BS2sx or
BS2p.
Содержание BASIC Stamp 1
Страница 1: ...BASIC Stamp Programming Manual Version 2 0c...
Страница 30: ...Introduction to the BASIC Stamps Page 28 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 34: ...Quick Start Guide Page 32 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 90: ...BUTTON BASIC Stamp Command Reference Page 88 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 118: ...END BASIC Stamp Command Reference Page 116 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 128: ...FREQOUT BASIC Stamp Command Reference Page 126 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 196: ...NAP BASIC Stamp Command Reference Page 194 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 206: ...OWIN BASIC Stamp Command Reference Page 204 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 214: ...OWOUT BASIC Stamp Command Reference Page 212 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 216: ...PAUSE BASIC Stamp Command Reference Page 214 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 226: ...POLLMODE BASIC Stamp Command Reference Page 224 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 232: ...POLLOUT BASIC Stamp Command Reference Page 230 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 236: ...POLLRUN BASIC Stamp Command Reference Page 234 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 240: ...POLLWAIT BASIC Stamp Command Reference Page 238 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 262: ...RCTIME BASIC Stamp Command Reference Page 260 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 274: ...RUN BASIC Stamp Command Reference Page 272 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 310: ...SEROUT BASIC Stamp Command Reference Page 308 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 324: ...STOP BASIC Stamp Command Reference Page 322 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 340: ...ASCII Chart Page 338 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 342: ...Reserved Words Page 340 BASIC Stamp Programming Manual 2 0b www parallaxinc com...
Страница 346: ...Conversion Formatters Page 344 BASIC Stamp Programming Manual 2 0b www parallaxinc com...