qpc-rtthread/examples/workstation/calc/main.c

/*****************************************************************************
* Product: calc Example
* Last updated for version 6.9.1
* Last updated on  2020-09-11
*
*                    Q u a n t u m  L e a P s
*                    ------------------------
*                    Modern Embedded Software
*
* Copyright (C) 2005 Quantum Leaps, LLC. All rights reserved.
*
* This program is open source software: you can redistribute it and/or
* modify it under the terms of the GNU General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Alternatively, this program may be distributed and modified under the
* terms of Quantum Leaps commercial licenses, which expressly supersede
* the GNU General Public License and are specifically designed for
* licensees interested in retaining the proprietary status of their code.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <www.gnu.org/licenses/>.
*
* Contact information:
* <www.state-machine.com/licensing>
* <info@state-machine.com>
*****************************************************************************/
#include "qpc.h"
#include "bsp.h"
#include "calc.h"

#include "safe_std.h" /* portable "safe" <stdio.h>/<string.h> facilities */

Q_DEFINE_THIS_FILE

/*..........................................................................*/
int main() {

    QF_init();
    QF_onStartup();

    PRINTF_S("Calculator example, QP version: %s\n"
           "Press '0' .. '9'     to enter a digit\n"
           "Press '.'            to enter the decimal point\n"
           "Press '+'            to add\n"
           "Press '-'            to subtract or negate a number\n"
           "Press '*'            to multiply\n"
           "Press '/'            to divide\n"
           "Press '=' or <Enter> to get the result\n"
           "Press 'c' or 'C'     to Cancel\n"
           "Press 'e' or 'E'     to Cancel Entry\n"
           "Press <Esc>          to quit.\n\n",
           QP_VERSION_STR);

    Calc_ctor(); /* explicitly instantiate the calculator object */
    QHSM_INIT(the_calc, (void *)0, 0U); /* trigger initial transition */

    for (;;) { /* event loop */
        CalcEvt e; /* Calculator event */

        BSP_display(); /* show the display */

        PRINTF_S("%s", " : ");
        fflush(stdout);
        e.key_code = (uint8_t)QF_consoleWaitForKey();
        PRINTF_S("%c ", (e.key_code >= ' ') ? e.key_code : 'X');

        switch (e.key_code) {
            case 'c': /* intentionally fall through */
            case 'C': {
                e.super.sig = C_SIG;
                break;
            }
            case 'e': /* intentionally fall through */
            case 'E': {
                e.super.sig = CE_SIG;
                break;
            }
            case '0': {
                e.super.sig = DIGIT_0_SIG;
                break;
            }
            case '1': /* intentionally fall through */
            case '2': /* intentionally fall through */
            case '3': /* intentionally fall through */
            case '4': /* intentionally fall through */
            case '5': /* intentionally fall through */
            case '6': /* intentionally fall through */
            case '7': /* intentionally fall through */
            case '8': /* intentionally fall through */
            case '9': {
                e.super.sig = DIGIT_1_9_SIG;
                break;
            }
            case '.': {
                e.super.sig = POINT_SIG;
                break;
            }
            case '+': /* intentionally fall through */
            case '-': /* intentionally fall through */
            case '*': /* intentionally fall through */
            case '/': {
                e.super.sig = OPER_SIG;
                break;
            }
            case '=': /* intentionally fall through */
            case '\r': { /* Enter key */
                e.super.sig = EQUALS_SIG;
                break;
            }
            case '\33': { /* ESC key */
                e.super.sig = OFF_SIG;
                break;
            }
            default: {
                e.super.sig = 0; /* invalid event */
                break;
            }
        }

        if (e.super.sig != 0) {  /* valid event generated? */
            QHSM_DISPATCH(the_calc, &e.super, 0U); /* dispatch event */
        }
    }

    QF_onCleanup();
    return 0;
}