/*
 * debug.c
 *
 * ------------------------------------------------------------
 * A Kla2 Module
 * Copyright (c) 2003, David Clifton
 * All Rights Reserved
 * http://www.codelode.com
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice, website reference, this permission
 * notice, and the disclaimer of warranty below shall be included
 * in all copies, derivatives, or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 * -------------------------------------------------------------
 *
 *    This module  allows the user to write characters,
 * to a section of memory set aside for that purpose.
 *
 *    If a write would otherwise go beyond the end of
 * the memory section, it wraps around to the beginning.
 *
 */
#include "types.h"
#include "intrpt.h"
#include "debug.h"
/*
 * size of the debug buffer
 */
#define DEBUG_BUF_SIZE (0x400)
/*
 * memory area and pointer for messages
 */
s8 debugBuf[DEBUG_BUF_SIZE];
s16 nextLoc=0;
/* -------------------------------------------------------
 * public methods of debug module
 * ------------------------------------------------------- */
/*
 * Debug_init
 *
 *   Clears the debug buffer and zero's its pointer
 */
void Debug_init(void)
{
    s16 j;

    for (j=0;j<DEBUG_BUF_SIZE;j++) {
        debugBuf[j]=' ';
    }
    nextLoc=0;
}
/*
 * debugPutc
 *
 *    Put the supplied character to the debug buffer
 */
void Debug_putc(s8 ch)
{
    s16 intsav;

    intsav=Intrpt_disable();
    debugBuf[nextLoc++]= ch;
    if(nextLoc>=DEBUG_BUF_SIZE) nextLoc=0;
    Intrpt_restore(intsav);
}