qpcpp/examples/80x86/dos/watcom/l/defer/bsp.cpp

//////////////////////////////////////////////////////////////////////////////
// Product: DOS console-based BSP, Open Eatcom
// Last Updated for Version: 4.2.00
// Date of the Last Update:  Nov 02, 2011
//
//                    Q u a n t u m     L e a P s
//                    ---------------------------
//                    innovating embedded systems
//
// Copyright (C) 2002-2011 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 supersede
// the GPL and are specifically designed for licensees interested in
// retaining the proprietary status of their code.
//
// Contact information:
// Quantum Leaps Web site:  http://www.quantum-leaps.com
// e-mail:                  info@quantum-leaps.com
//////////////////////////////////////////////////////////////////////////////
#include "qp_port.h"
#include "bsp.h"

#include <dos.h>                          // for _dos_setvect()/_dos_getvect()
#include <conio.h>                                         // for inp()/outp()
#include <stdlib.h>                                             // for _exit()
#include <stdio.h>

// Local-scope objects -------------------------------------------------------
static void interrupt (*l_dosTmrISR)();
static void interrupt (*l_dosKbdISR)();

#define TMR_VECTOR      0x08
#define KBD_VECTOR      0x09

//............................................................................
static void interrupt ISR_tmr() {
    QF_ISR_ENTRY();

    QF::tick();                                //<-- process the QF clock tick

    QF_ISR_EXIT();
}
//............................................................................
static void interrupt ISR_kbd() {
    QF_ISR_ENTRY();

    uint8_t key = inp(0x60);         // key scan code from 8042 kbd controller
    uint8_t kcr = inp(0x61);                  // get keyboard control register
    outp(0x61, (uint8_t)(kcr | 0x80));          // toggle acknowledge bit high
    outp(0x61, kcr);                             // toggle acknowledge bit low

    BSP_onKeyboardInput(key);        // process the key (application specific)

    QF_ISR_EXIT();
}
//............................................................................
void BSP_init(int, char *[]) {
}
//............................................................................
void QF::onStartup(void) {
                                         // save the origingal DOS vectors ...
    l_dosTmrISR = _dos_getvect(TMR_VECTOR);
    l_dosKbdISR = _dos_getvect(KBD_VECTOR);

    QF_INT_DISABLE();
    _dos_setvect(TMR_VECTOR, &ISR_tmr);
    _dos_setvect(KBD_VECTOR, &ISR_kbd);
    QF_INT_ENABLE();
}
//............................................................................
void QF::onCleanup(void) {
                                       // restore the original DOS vectors ...
    QF_INT_DISABLE();
    _dos_setvect(TMR_VECTOR, l_dosTmrISR);
    _dos_setvect(KBD_VECTOR, l_dosKbdISR);
    QF_INT_ENABLE();

    _exit(0);                                                   // exit to DOS
}
//............................................................................
void QF::onIdle(void) {              // NOTE: entered with interrupts DISABLED
    QF_INT_ENABLE();                        // must at least enable interrupts
}
//............................................................................
extern "C" void Q_onAssert(char const Q_ROM *const Q_ROM_VAR file, int line) {
    fprintf(stderr, "Assertion failed in %s, line %d", file, line);
    QF::stop();
}