mirror of
https://github.com/RIOT-OS/RIOT.git
synced 2024-12-29 04:50:03 +01:00
83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
/*
|
|
* Copyright (C) 2014 René Kijewski <rene.kijewski@fu-berlin.de>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @ingroup x86
|
|
* @{
|
|
*
|
|
* @file
|
|
* @brief Trivial functions to write to the videoram.
|
|
*
|
|
* @author René Kijewski <rene.kijewski@fu-berlin.de>
|
|
*
|
|
* @}
|
|
*/
|
|
|
|
#include "x86_videoram.h"
|
|
|
|
#define VIDEORAM ((char *) 0xB8000)
|
|
|
|
void videoram_putc(char c)
|
|
{
|
|
static unsigned pos = 0;
|
|
if (c == '\n') {
|
|
pos += 80;
|
|
}
|
|
else if (c == '\r') {
|
|
pos = (pos / 80) * 80;
|
|
}
|
|
else {
|
|
VIDEORAM[2 * pos + 0] = c;
|
|
VIDEORAM[2 * pos + 1] = (char) 0x9E; /* light blue bg, light yellow fg */
|
|
++pos;
|
|
}
|
|
if (pos >= 25 * 80) {
|
|
pos = 0;
|
|
}
|
|
}
|
|
|
|
void videoram_put(const char *s)
|
|
{
|
|
for (; *s; ++s) {
|
|
videoram_putc(*s);
|
|
}
|
|
}
|
|
|
|
void videoram_puts(const char *s)
|
|
{
|
|
videoram_put(s);
|
|
videoram_put("\r\n");
|
|
}
|
|
|
|
void videoram_put_hex(unsigned long v)
|
|
{
|
|
char s[2 + 2 * sizeof v + 1];
|
|
char *p = &s[sizeof s];
|
|
|
|
*--p = 0;
|
|
do {
|
|
char c = v % 16;
|
|
v /= 16;
|
|
*--p = c + (c < 10 ? '0' : 'A' - 10);
|
|
} while (v > 0);
|
|
*--p = 'x';
|
|
*--p = '0';
|
|
|
|
videoram_put(p);
|
|
}
|