console.c

/*
 * MIT License
 *
 * Copyright (c) 2017 Mockba the Borg
 *
 * 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 and this permission notice shall be included in all
 * copies 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.
 */

#include <stdio.h>
#include <termios.h>
#include "console.h"

static struct termios _old_term, _new_term;

void _console_init(void) {
    tcgetattr(0, &_old_term);
    
    _new_term = _old_term;
    
    _new_term.c_lflag &= ~ICANON; /* Input available immediately (no EOL needed) */
    _new_term.c_lflag &= ~ECHO; /* Do not echo input characters */
    _new_term.c_lflag &= ~ISIG; /* ^C and ^Z do not generate signals */
    _new_term.c_iflag &= INLCR; /* Translate NL to CR on input */
    
    tcsetattr(0, TCSANOW, &_new_term); /* Apply changes immediately */
    
    setvbuf(stdout, (char *)NULL, _IONBF, 0); /* Disable stdout buffering */
}

void _console_reset(void) {
    tcsetattr(0, TCSANOW, &_old_term);
}

unsigned char _getch(void) {
    return getchar();
}

void _putch(uint8_t ch) {
    putchar(ch);
}


uint8_t mask8bit = 0x7f;    // TO be used for masking 8 bit characters (XMODEM related)
                            // If set to 0x7f, RunCPM masks the 8th bit of characters sent
                            // to the console. This is the standard CP/M behavior.
                            // If set to 0xff, RunCPM passes 8 bit characters. This is
                            // required for XMODEM to work.
                            // Use the CONSOLE7 and CONSOLE8 programs to change this on the fly.
/*
uint8_t _chready(void)      // Checks if there's a character ready for input
{
    return(_kbhit() ? 0xff : 0x00);
}

uint8_t _getchNB(void)      // Gets a character, non-blocking, no echo
{
    return(_kbhit() ? _getch() : 0x00);
}
*/
void _putcon(uint8_t ch)        // Puts a character
{
    _putch(ch & mask8bit);
}

void _puts(const char *str) // Puts a \0 terminated string
{
    while (*str)
        _putcon(*(str++));
}

void _puthex8(uint8_t c)        // Puts a HH hex string
{
    _putcon(tohex(c >> 4));
    _putcon(tohex(c & 0x0f));
}

void _puthex16(uint16_t w)  // puts a HHHH hex string
{
    _puthex8(w >> 8);
    _puthex8(w & 0x00ff);
}