Acrob003 - História úprav

Balogh na 14:09, 12. jún 2010

2010-06-12T14:09:31Z

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	== LED blink ==		== '''LED blink''' ==

Balogh na 14:09, 12. jún 2010

2010-06-12T14:09:22Z

← Staršia verzia		Verzia z 14:09, 12. jún 2010
Riadok 1:		Riadok 1:
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	== LED blink ==		== LED blink ==

Balogh: /* How it works */

2010-06-12T09:06:48Z

How it works

← Staršia verzia		Verzia z 09:06, 12. jún 2010
Riadok 27:		Riadok 27:

	It is necessary to determine whether the certain pin will be configured as an INPUT or OUTPUT one. This is done in Setup section using the command <TT>		It is necessary to determine whether the certain pin will be configured as an INPUT or OUTPUT one. This is done in Setup section using the command <TT>
	pinMode( PIN_NUMBER, IPUT/OUTPUT );</TT>. To avoid annoying searching through the code in the case we move the LED from certain pin to another,		pinMode( PIN_NUMBER, IPUT/OUTPUT );</TT>. To avoid annoying searching through the code in the case we move the LED from certain pin to another,
	instead of "hardcoded" pinnumber for LED we use a substitution <TT>#define LED_Yellow 13</TT>. In case of modification, it is necessary to change		instead of "hardcoded" pinnumber for LED we use a substitution <TT>#define LED_Yellow 13</TT>. In case of modification, it is necessary to change
	the configuration only on this one line.		the configuration only on this one line.

Balogh: /* How it works */

2010-06-12T09:06:32Z

How it works

← Staršia verzia		Verzia z 09:06, 12. jún 2010
Riadok 27:		Riadok 27:

	It is necessary to determine whether the certain pin will be configured as an INPUT or OUTPUT one. This is done in Setup section using the command <TT>		It is necessary to determine whether the certain pin will be configured as an INPUT or OUTPUT one. This is done in Setup section using the command <TT>
			pinMode( PIN_NUMBER, IPUT/OUTPUT );</TT>. To avoid annoying searching through the code in the case we move the LED from certain pin to another,
			instead of "hardcoded" pinnumber for LED we use a substitution <TT>#define LED_Yellow 13</TT>. In case of modification, it is necessary to change
			the configuration only on this one line.

			Then, after an initialization the programm enters the main loop. Command <TT>digitalWrite(LED_Yellow, HIGH/LOW); </TT> can change the state of the
			output HIGH (i.e. logical One, electrical +5V) or LOW (i.e. logical Zero, electrical 0V). Certainly, the electrical voltage present on the output
			pin makes LED lit, and vice versa. The pin remains in its output state until it is again changed. So the LED remains on for the certain amount of the time which is defined by the <TT>delay(Period); </TT> command, where ''Period'' is defined in miliseconds (1/1000 s).

	=== Your turn ===		=== Your turn ===

Balogh: /* How it works */

2010-06-12T09:00:19Z

How it works

← Staršia verzia		Verzia z 09:00, 12. jún 2010
Riadok 24:		Riadok 24:

	=== How it works ===		=== How it works ===


			It is necessary to determine whether the certain pin will be configured as an INPUT or OUTPUT one. This is done in Setup section using the command <TT>

	=== Your turn ===		=== Your turn ===

Balogh: Nová stránka: == LED blink == right Your board contains one user programmable LED diode (see schematic). Let's try to controll it using the followng programm...

2010-06-12T07:21:19Z

Nová stránka: == LED blink == right Your board contains one user programmable LED diode (see schematic). Let's try to controll it using the followng programm...

Nová stránka

== LED blink ==

[[Obrázok:ArduinoLEDExample.png|right]]

Your board contains one user programmable LED diode (see schematic). Let's try to controll it using the followng programm:
<source lang="c">
#define LED_Yellow 13 // select the pin for LED

void setup()
{
pinMode(LED_Yellow, OUTPUT ); // this pin is an OUTPUT
}

void loop() // endless loop
{
digitalWrite(LED_Yellow, HIGH); // make it visible
delay(1000); // wait 1000 ms = 1s
digitalWrite(LED_Yellow, LOW); // turn off
delay(1000); // wait again
}
</source>

=== How it works ===

=== Your turn ===

Connect Your own LED on the experimental breadboard. Connect the LED to the pin D2, it
will be assigned with number 2 in Your program digitalWrite(2,HIGH).

[[Obrázok:ArduinoLEDconnection.png|center]]

Change the program to blink with both LEDs - Your and the onboard. Can You program them tu
blink mutually like on the railway crosses?

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