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