48 lines
1.4 KiB
Plaintext
48 lines
1.4 KiB
Plaintext
/*
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* Sample arduino sketch using contiki features.
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* We turn the LED on and off and allow setting the interval and the
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* brightness of the LED via coap.
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* Unfortunately sleeping for long times in loop() isn't currently
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* possible, something turns off the CPU (including PWM outputs) if a
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* Proto-Thread is taking too long. We need to find out how to sleep in
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* a Contiki-compatible way.
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* Note that for a normal arduino sketch you won't have to include any
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* of the contiki-specific files here, the sketch should just work.
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*/
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extern "C" {
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#include <stdio.h>
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#include <hw_timer.h>
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#include "led_setting.h"
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#define TIMER 3
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#define PIN_PWM_C 4
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static uint16_t pwm_max = 0;
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}
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void setup (void)
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{
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hwtimer_ini (3, HWT_WGM_PWM_PHASE_8_BIT, HWT_CLOCK_PRESCALER_8, 0);
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//hwtimer_pwm_ini (TIMER, 1000, HWT_PWM_FAST, 0);
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hwtimer_pwm_enable (TIMER, HWT_CHANNEL_C);
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hwtimer_set_pwm (TIMER, HWT_CHANNEL_C, 0);
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pinMode (PIN_PWM_C, OUTPUT);
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pwm_max = hwtimer_pwm_max_ticks (TIMER);
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printf ("pwm_max: %u\n", pwm_max);
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}
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void loop (void)
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{
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static int direction = 1;
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static unsigned const char *led_ptr = led_setting;
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hwtimer_set_pwm (TIMER, HWT_CHANNEL_C, *led_ptr);
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//printf ("p: %u\n", *led_ptr);
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if (led_ptr >= led_setting + sizeof (led_setting) - 1 && direction > 0) {
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direction = -1;
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}
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if (led_ptr <= led_setting && direction < 0) {
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direction = 1;
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}
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led_ptr += direction;
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}
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