Prints "Hello World!" every 5 seconds, and blinks LED1 at a defined hertz.
Dependencies: mbed
Diff: main.cpp
- Revision:
- 0:543eb4b01cda
- Child:
- 1:f09b0fb6022a
diff -r 000000000000 -r 543eb4b01cda main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Tue Oct 14 18:07:09 2014 +0000 @@ -0,0 +1,35 @@ +#include "mbed.h" + +// A simple and concise explanation of what this program does +/* Simple Hello World program that outputs "Hello World!" every + five seconds to the serial debug port, and blinks at the user + defined hertz +*/ + +// LED blink rate: higher -> faster blinking +#define LED_BLINK_RATE 4 //Hertz + +//Define the LED pin output +DigitalOut led(LED1); +//Define timers +Timer print_timer; +Timer led_timer; + +int main() { + led = 0; //Initialize LED off + print_timer.start(); //Start timers, will count until stopped + led_timer.start(); + + while (1) { + if (print_timer.read() >= 5) { //print_timer.read() returns time in seconds + printf("Hello World!\n"); + print_timer.reset(); //Resets timer count to 0 + } + + //Calculates interval needed for specified frequency + if ( led_timer.read_ms() >= (1000.0/(2*LED_BLINK_RATE))) { + led = !led; //Invert LED output + led_timer.reset(); //Resets timer count to 0 + } + } +} \ No newline at end of file