console.c

Bycore是一个嵌入式操作系统内核。Bycore包括内存管理、任务管理、中断管理、任务互斥、同步与通信管理等功能。Bycore全部由C语言完成

/**
 *  console.h - Console program based on uart.
 *
 *  Copyright (C) 2008  ZhangHu
 *  All rights reserved.
 *  E-MAIL: [e-mail]
 *
 *  This program is free 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.
 *
 *  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 <http://www.gnu.org/licenses/>.
 *
 */


#include "console.h"

char_t RevByte(void) {
    char_t ch;
    word_t fd;

    ch = 0;
    if((fd = open("uart0")) == -1) {
        return ch;
    }

    read(fd, &ch, 1);
    close(fd);
    return ch;
}

uword_t RevStr(char_t *buf) {
    word_t fd, cnt;

    if((fd = open("uart0")) == -1) {
        return 0;
    }

    cnt = read(fd, buf, 1024);
    close(fd);
	return cnt;
}

void SendByte(char_t ch) {
    word_t fd;

    if((fd = open("uart0")) == -1) {
        return;
    }

    write(fd, &ch, 1);
    close(fd);
}

uword_t SendStr(char_t *buf) {
    word_t fd, snd_cnt;
    char ch;

	snd_cnt = 0;
    if((fd = open("uart0")) == -1) {
        return 0;
    }

    while(*buf != '\0') {
        ch = *buf;
        write(fd, &ch, 1);
        snd_cnt++;
        buf++;
    }
    close(fd);
    return snd_cnt;
}

#include <stdarg.h>
#include <stdio.h>
/* Not recommended to do so, but this function is very convenient */
void Print(char_t *fmt, ...) {
  va_list ap;
  char_t str[128];

  va_start(ap, fmt);
  mac_disable_irq();
  vsprintf(str, fmt, ap);
  mac_enable_irq();
  SendStr(str);
  va_end(ap);
}

void Clear(void) {
    word_t fd;
    if((fd = open("uart0")) == -1) {
        return;
    }
    ioctl(fd, UART_CMD_RESET, NULL);
    close(fd);
}