c46d6afa39
New discovery: Contiki also uses timer 0. With almost the same interface as Arduino. So we now completely get rid of wiring.c (only the main file, the other wiring_xxx stay) and implement Arduino timer, delay, etc in terms of the corresponding Contiki routines. Verified that now delay works as expected. The LED in examples/osd/arduino-sketch blinks! Before this, the arduino_init routine in wiring.c destroyed the timer-0 initialization of contiki, making both, contiki timer implementation *and* contiki timer implementation fail if the arduino_init routine was called. Now both work. Squashed with following bug-fix commit.
38 lines
1.1 KiB
Plaintext
38 lines
1.1 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 "led_pwm.h"
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#define LED_PIN 5
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uint8_t pwm = 128;
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uint8_t period_100ms = 10; /* one second */
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}
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void setup (void)
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{
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rest_init_engine ();
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rest_activate_resource (&resource_led_pwm);
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rest_activate_resource (&resource_led_period);
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}
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void loop (void)
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{
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/* Use 255 - pwm, LED on merkur-board is wired to +3.3V */
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analogWrite (LED_PIN, 255 - pwm);
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printf ("clock : %u\nmillis: %lu\n", clock_time (), millis ());
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delay (period_100ms * 100);
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analogWrite (LED_PIN, 255); /* OFF: LED on merkur-board is wired to +3.3V */
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delay (period_100ms * 100);
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}
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