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<h1>RCTIME Examples</h1>
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<p style="text-align: right;">Syntax: <a href="../Commands/RCTIME.htm" target="" title="" alt="" class="MCXref_0" xrefformat="{paratext}">RCTIME</a></p>
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<p>NOTE: The example below is written for the BS2 and will run on any of the BS2-family modules. Modify the $STAMP directive (as required) before downloading to the BS2e, BS2sx, BS2p, BS2pe, or BS2px.</p>
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</p><pre class="BScode" xml:space="preserve">' RCTIME1.BS2
' This program shows the standard use of the RCTIME instruction measuring
' an RC charge/discharge time. Use the circuit in the RCTIME description
' (in the manual) with R = 10K pot and C = 0.1 uF. Connect the circuit to
' pin 7 and run the program. Adjust the pot and watch the value shown on
' the Debug screen change.
' {$STAMP BS2}
' {$PBASIC 2.5}
RC PIN 7
result VAR Word
Main:
DO
HIGH RC ' charge the cap
PAUSE 1 ' for 1 ms
RCTIME RC, 1, result ' measure RC discharge time
DEBUG HOME, DEC result ' display value
PAUSE 50
LOOP
END
</pre>
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<p>NOTE: The example below is written for the BS2 and will run on any of the BS2-family modules. Modify the $STAMP directive (as required) before downloading to the BS2e, BS2sx, BS2p, BS2pe, or BS2px.</p>
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<img src="../../graphics/rctime2_sch.gif" />
</p><pre class="BScode" xml:space="preserve">' RCTIME2.BS2
' This program illustrates the use of RCTIME as a fast stopwatch. The
' program energizes a relay coil, then measures how long it takes for the
' relay contacts to close. The circuit for this program can be found in
' the manual. Note that RCTIME doesn't start timing instantly -- as with
' all PBASIC instructions, it must be fetched from program EEPROM before
' it can execute.
' {$STAMP BS2}
' {$PBASIC 2.5}
Coil PIN 6
RC PIN 7
#SELECT $STAMP
#CASE BS2, BS2E, BS2PE
Adjust CON $200 ' x 2 us per unit
#CASE BS2SX
Adjust CON $0CC ' x 0.8 us per unit
#CASE BS2P
Adjust CON $0C0 ' x 0.75 us per unit
#CASE BS2PX
Adjust CON $0C0 ' x 0.75 us per unit
#ENDSELECT
result VAR Word
Main:
DO
LOW Coil ' energize relay coil
RCTIME RC, 1, result ' measure time to contact closure
result = result */ Adjust ' adjust for device
DEBUG "Time to close: ",
DEC Result, CR
HIGH Coil ' release relay
PAUSE 1000 ' wait one second
LOOP
END
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