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author | Perry Hung <iperry@gmail.com> | 2011-01-24 23:23:29 -0500 |
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committer | Perry Hung <iperry@gmail.com> | 2011-01-24 23:23:29 -0500 |
commit | c48689d34809943a5907884bd287cea9ae275352 (patch) | |
tree | d49ff06b0d4b81f6ab0eac8060d178ce7542476c /docs/source/lang/api/millis.rst | |
parent | 64431fd4b59cb8656365f1fad5f679cd4d756239 (diff) | |
parent | a9b2d70bc7799ca96c1673b18fe3012b1a4dd329 (diff) | |
download | librambutan-c48689d34809943a5907884bd287cea9ae275352.tar.gz librambutan-c48689d34809943a5907884bd287cea9ae275352.zip |
Merge remote branch 'leaf/master'
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-rw-r--r-- | docs/source/lang/api/millis.rst | 52 |
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diff --git a/docs/source/lang/api/millis.rst b/docs/source/lang/api/millis.rst new file mode 100644 index 0000000..54e4507 --- /dev/null +++ b/docs/source/lang/api/millis.rst @@ -0,0 +1,52 @@ +.. highlight:: cpp + +.. _lang-millis: + +millis() +======== + +Returns the number of milliseconds since the Maple board began running +the current program. This number will overflow (go back to zero) after +approximately 50 days. + +Library Documentation +--------------------- + +.. doxygenfunction:: millis + +Example +------- + +The following time prints the value returned by ``millis()`` roughly +once per second:: + + unsigned int time; + + void setup() { + } + + void loop() { + SerialUSB.print("Time: "); + time = millis(); + // prints time since program started + Serial.println(time); + + // wait a second so as not to send massive amounts of data + delay(1000); + } + +Tip +--- + +Since the return value for ``millis()`` is an :ref:`unsigned long +<lang-unsignedlong>`, overflow errors may occur if you try to do math +with other data types, such as :ref:`ints <lang-int>`. + +See Also +-------- + +- :ref:`micros <lang-micros>` +- :ref:`delay <lang-delay>` +- :ref:`delayMicroseconds <lang-delaymicroseconds>` + +.. include:: cc-attribution.txt |