oper.c

a super good method for designing finite state machine

/*****************************************************************************
* Time Bomb example (FSM)
* Last Updated for Version: 1.5.00
* Date of the Last Update:  Sep 17, 2006
*
* Copyright (C) 2002-2006 Quantum Leaps, LLC. All rights reserved.
*
* This software may be distributed and modified under the terms of the GNU
* General Public License version 2 (GPL) as published by the Free Software
* Foundation and appearing in the file GPL.TXT included in the packaging of
* this file. Please note that GPL Section 2[b] requires that all works based
* on this software must also be made publicly available under the terms of
* the GPL ("Copyleft").
*
* Alternatively, this software may be distributed and modified under the
* terms of Quantum Leaps commercial licenses, which expressly allow the
* licensees to retain the proprietary status of their code. The licensees
* who use this software under one of Quantum Leaps commercial licenses do
* not use this software under the GPL and therefore are not subject to any
* of its terms.
*
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*****************************************************************************/
#include "qpn_port.h"
#include "qassert.h"
#include "bsp.h"
#include "bomb.h"

/*--------------------------------------------------------------------------*/
void Oper_initial(Oper *me);
void Oper_approach(Oper *me);
void Oper_retreat(Oper *me);

/*..........................................................................*/
void Oper_ctor(Oper *me, uint8_t freq) {
    QActive_ctor(me, &Oper_initial);                /* call superclass ctor */
    me->timeout__ = BSP_TICKS_PER_SEC / freq;              /* the ramp tout */
}
/*..........................................................................*/
void Oper_initial(Oper *me) {
    switch (Q_SIG(me)) {
        case Q_TOP_INIT_SIG: {
            Q_TRAN(&Oper_approach);
            break;
        }
    }
}
/*..........................................................................*/
void Oper_approach(Oper *me) {
    switch (Q_SIG(me)) {
        case Q_ENTRY_SIG: {
            QActive_arm((QActive *)me, me->timeout__);
            me->brightness__ = 1;
            LED_grn(me->brightness__);
            break;
        }
        case Q_EXIT_SIG: {
            QF_post(BOMB_PRIO, ARM_SIG, 0);
            break;
        }
        case Q_TIMEOUT_SIG: {
            if (me->brightness__ < (uint8_t)(1 << 7)) {
                QActive_arm((QActive *)me, me->timeout__);
                me->brightness__ <<= 1;
                LED_grn(me->brightness__);
            }
            else {
                Q_TRAN(&Oper_retreat);
            }
            break;
        }
    }
}
/*..........................................................................*/
void Oper_retreat(Oper *me) {
    switch (Q_SIG(me)) {
        case Q_ENTRY_SIG: {
            QActive_arm((QActive *)me, me->timeout__);
            me->brightness__ = (uint8_t)(1 << 7);
            LED_grn(me->brightness__);
            break;
        }
        case Q_TIMEOUT_SIG: {
            if (me->brightness__ > (uint8_t)1) {
                me->brightness__ >>= 1;
                LED_grn(me->brightness__);
                QActive_arm((QActive *)me, me->timeout__);
            }
            else {
                Q_TRAN(&Oper_approach);
            }
            break;
        }
    }
}