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osd-contiki/platform/osd-merkur/dev/hw-arduino.h

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Add Arduino compatibility layer We can now directly compile arduino sketches (.pde) files. Arduino compatible analogWrite works now. But there is still a long way to go, serial I/O and timer stuff (delay, millis etc) currently don't work (not tested but I don't expect this to work). It can be used in an arduino sketch or in a normal contiki program. We get a PWM frequency of 490.2 Hz (a period of 2.040 ms), that's Arduino compatible. If you need different frequencies see native timer usage in examples/osd/pwm-example In a contiki program you have to call arduino_pwm_timer_init to initialize the timer before pwm works. The arduino sketch wrapper already does this. For running a sketch, see examples/osd/arduino-sketch
2014-06-26 11:00:01 +02:00
/*
* Copyright (c) 2014, Ralf Schlatterbeck Open Source Consulting
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*/
/**
* \defgroup compatibility Arduino - Contiki
*
* This defines contiki-compatible hardware definitions for running
* arduino sketches (or just to call arduino-compatible function).
* For now only for osd hardware, a similar file should exist for each
* arduino-compatible hardware.
*
* @{
*/
/**
* \file
* Header file for arduino compatibility
* \author
* Ralf Schlatterbeck <rsc@runtux.com>
*
*/
Make Arduino timer stuff work on Contiki 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.
2014-06-26 18:37:13 +02:00
#ifdef __cplusplus
extern "C"{
#endif
#include "contiki.h"
Add Arduino compatibility layer We can now directly compile arduino sketches (.pde) files. Arduino compatible analogWrite works now. But there is still a long way to go, serial I/O and timer stuff (delay, millis etc) currently don't work (not tested but I don't expect this to work). It can be used in an arduino sketch or in a normal contiki program. We get a PWM frequency of 490.2 Hz (a period of 2.040 ms), that's Arduino compatible. If you need different frequencies see native timer usage in examples/osd/pwm-example In a contiki program you have to call arduino_pwm_timer_init to initialize the timer before pwm works. The arduino sketch wrapper already does this. For running a sketch, see examples/osd/arduino-sketch
2014-06-26 11:00:01 +02:00
/*
* The OSD hardware only supports timer 3 for PWM, timer 2 is used by
* contiki for sleep/wakeup timing and is not usable for PWM.
*/
#define digitalPinToTimer(pin) \
( (pin) == 3 \
? TIMER3A \
: ( (pin) == 4 \
? TIMER3B \
: ((pin == 5) ? TIMER3C : NOT_ON_TIMER) \
) \
)
/* Only init timer 3 with phase correct pwm 8-bit and prescaler 64 */
#define arduino_pwm_timer_init() \
(hwtimer_ini (3, HWT_WGM_PWM_PHASE_8_BIT, HWT_CLOCK_PRESCALER_64, 0))
/*
* VI settings, see coding style
* ex:ts=8:et:sw=2
*/
Make Arduino timer stuff work on Contiki 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.
2014-06-26 18:37:13 +02:00
#ifdef __cplusplus
} // extern "C"
#endif
Add Arduino compatibility layer We can now directly compile arduino sketches (.pde) files. Arduino compatible analogWrite works now. But there is still a long way to go, serial I/O and timer stuff (delay, millis etc) currently don't work (not tested but I don't expect this to work). It can be used in an arduino sketch or in a normal contiki program. We get a PWM frequency of 490.2 Hz (a period of 2.040 ms), that's Arduino compatible. If you need different frequencies see native timer usage in examples/osd/pwm-example In a contiki program you have to call arduino_pwm_timer_init to initialize the timer before pwm works. The arduino sketch wrapper already does this. For running a sketch, see examples/osd/arduino-sketch
2014-06-26 11:00:01 +02:00
/** @} */
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