74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
#include "contiki.h"
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#include "random.h"
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#include "powertrace.h"
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#include "dev/leds.h"
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#include <stdio.h>
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PROCESS(power, "powertrace example");
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AUTOSTART_PROCESSES(&power);
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int d1(float f) // Integer part
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{
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return((int)f);
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}
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unsigned int d2(float f) // Fractional part
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{
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if (f>0)
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return(1000*(f-d1(f)));
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else
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return(1000*(d1(f)-f));
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}
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PROCESS_THREAD(power, ev, data)
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{
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static struct etimer et;
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static float t;
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PROCESS_BEGIN();
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/* Start powertracing */
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int n = 1; // 1 second reporting cycle
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powertrace_start(CLOCK_SECOND * n);
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printf("Ticks per second: %u\n", RTIMER_SECOND);
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while(1)
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{
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/* Delay 2-4 seconds and then perform some tasks */
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t = 2*((float)random_rand()/RANDOM_RAND_MAX) + 2;
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etimer_set(&et, CLOCK_SECOND*t);
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
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// Put your tasks here...
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// Task 1: Switching LED
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static int ledStatus = 0;
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switch(ledStatus) {
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case 0: leds_on(LEDS_RED);
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leds_off(LEDS_GREEN);
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leds_off(LEDS_BLUE);
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break;
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case 1: leds_off(LEDS_RED);
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leds_on(LEDS_GREEN);
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leds_off(LEDS_BLUE);
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break;
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case 2: leds_off(LEDS_RED);
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leds_off(LEDS_GREEN);
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leds_on(LEDS_BLUE);
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break;
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default:
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leds_on(LEDS_ALL);
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ledStatus = -1;
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}
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ledStatus++;
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// Task 2: Squaring a floating point
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float sq = t*t;
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printf("floor(sq)=%d\n", (int)sq);
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}
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PROCESS_END();
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}
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