kernelswi.cpp

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/*===========================================================================
     _____        _____        _____        _____
 ___|    _|__  __|_    |__  __|__   |__  __| __  |__  ______
|    \  /  | ||    \      ||     |     ||  |/ /     ||___   |
|     \/   | ||     \     ||     \     ||     \     ||___   |
|__/\__/|__|_||__|\__\  __||__|\__\  __||__|\__\  __||______|
    |_____|      |_____|      |_____|      |_____|

--[Mark3 Realtime Platform]--------------------------------------------------

Copyright (c) 2012 - 2019 m0slevin, all rights reserved.
See license.txt for more information
===========================================================================*/
#include "kerneltypes.h"
#include "kernelswi.h"

#include <avr/io.h>
#include <avr/interrupt.h>

namespace Mark3
{
//---------------------------------------------------------------------------
void KernelSWI::Config(void)
{
    PORTB &= ~0x04;                       // Clear INT2
    DDRB |= 0x04;                         // Set PortB, bit 2 (INT2) As Output
    EICRA |= (1 << ISC20) | (1 << ISC21); // Rising edge on INT2
}

//---------------------------------------------------------------------------
void KernelSWI::Start(void)
{
    EIFR &= ~(1 << INTF2); // Clear any pending interrupts on INT2
    EIMSK |= (1 << INT2);  // Enable INT2 interrupt (as int32_t as I-bit is set)
}

//---------------------------------------------------------------------------
void KernelSWI::Trigger(void)
{
    // if(Thread_IsSchedulerEnabled())
    {
        PORTB &= ~0x04;
        PORTB |= 0x04;
    }
}
} // namespace Mark3