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authorMarti Bolivar <mbolivar@mit.edu>2010-12-21 10:27:37 -0500
committerMarti Bolivar <mbolivar@mit.edu>2010-12-21 10:27:37 -0500
commitc45bccad44187da27505cf5808424e709e3f54a1 (patch)
tree18a459a50f8d0551ba046e30462c93999d982725 /docs/source/arduino/randomseed.rst
parent84fd2532a7f23d20354ff590790b3f892cb7e7d7 (diff)
parentd5ad2a27f4e69e6cc9324331945937c983c30366 (diff)
downloadlibrambutan-c45bccad44187da27505cf5808424e709e3f54a1.tar.gz
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Merge branch 'master' into debug-serialusb.
Chose debug-serialusb version in cases of conflict. Conflicts: libmaple/usb/usb_callbacks.c
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-.. _arduino-randomseed:
-
-randomSeed(seed)
-================
-
-Description
------------
-
-randomSeed() initializes the pseudo-random number generator,
-causing it to start at an arbitrary point in its random sequence.
-This sequence, while very long, and random, is always the same.
-
-
-
-If it is important for a sequence of values generated by random()
-to differ, on subsequent executions of a sketch, use randomSeed()
-to initialize the random number generator with a fairly random
-input, such as analogRead() on an unconnected pin.
-
-
-
-Conversely, it can occasionally be useful to use pseudo-random
-sequences that repeat exactly. This can be accomplished by calling
-randomSeed() with a fixed number, before starting the random
-sequence.
-
-
-
-Parameters
-----------
-
-long, int - pass a number to generate the seed.
-
-
-
-Returns
--------
-
-no returns
-
-
-
-Example
--------
-
-::
-
- long randNumber;
-
- void setup(){
- Serial.begin(9600);
- randomSeed(analogRead(0));
- }
-
- void loop(){
- randNumber = random(300);
- Serial.println(randNumber);
-
- delay(50);
- }
-
-
-
-See also
---------
-
-
-- `random <http://arduino.cc/en/Reference/Random>`_
-
-