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Add a simple Timer example for CTC mode. #5

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Add a simple Timer example for CTC mode. #5

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40 changes: 40 additions & 0 deletions framework/examples/Basics/1.Getting Started/Timer/Timer.pde
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/**
* Blink the Wiring board LED
* by Yann Dirson <ydirson@free.fr>
*
* turns on and off the Wiring board LED, with
* intervals of 1 second, using a 16bit timer
* interrupt to avoid burning electrons with active wait.
*
* For the Wiring boards v1 the on-board LED is on pin 48,
* on Wiring S the on-board LED is on pin 15.
* it is also possible to use the WLED constant with the
* digitalWrite command: digitalWrite(WLED, HIGH). WLED will be the
* correct pin in the current board selected in the
* Tools -> Board menu.
*/

void timer1_irq()
{
static int led = LOW;
led = (led==LOW) ? HIGH : LOW;
digitalWrite(WLED, led);
}

void setup() {
pinMode(WLED, OUTPUT);

Timer1.setMode(0b0100); // CTC mode with OCR1A
Timer1.setClockSource(CLOCK_PRESCALE_1024);
Timer1.setOCR(CHANNEL_A, F_CPU/1024);
Timer1.attachInterrupt(INTERRUPT_COMPARE_MATCH_A, timer1_irq);
Timer1.enableInterrupt(INTERRUPT_COMPARE_MATCH_A);

// disable unused clocks
Timer0.setClockSource(CLOCK_STOP);
Timer3.setClockSource(CLOCK_STOP);
}

void loop() {
sleep_mode();
}