source: SVN/rincon/u-boot/common/cmd_display.c @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 2 years ago

rincon: added latest u-boot source

restored form server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 1.9 KB
Line 
1/*
2 * (C) Copyright 2005
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25#include <command.h>
26
27#undef DEBUG_DISP
28
29#define DISP_SIZE       8
30#define CWORD_CLEAR     0x80
31#define CLEAR_DELAY     (110 * 2)
32
33int do_display (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
34{
35        int i;
36        int pos;
37
38        /* Clear display */
39        *((volatile char*)(CFG_DISP_CWORD)) = CWORD_CLEAR;
40        udelay(1000 * CLEAR_DELAY);
41
42        if (argc < 2)
43                return (0);
44
45        for (pos = 0, i = 1; i < argc && pos < DISP_SIZE; i++) {
46                char *p = argv[i], c;
47
48                if (i > 1) {
49                        *((volatile uchar *) (CFG_DISP_CHR_RAM + pos++)) = ' ';
50#ifdef DEBUG_DISP
51                        putc(' ');
52#endif
53                }
54
55                while ((c = *p++) != '\0' && pos < DISP_SIZE) {
56                        *((volatile uchar *) (CFG_DISP_CHR_RAM + pos++)) = c;
57#ifdef DEBUG_DISP
58                        putc(c);
59#endif
60                }
61        }
62
63#ifdef DEBUG_DISP
64        putc('\n');
65#endif
66
67        return (0);
68}
69
70/***************************************************/
71
72U_BOOT_CMD(
73        display,        CFG_MAXARGS,    1,      do_display,
74        "display- display string on dot matrix display\n",
75        "[<string>]\n"
76        "    - with <string> argument: display <string> on dot matrix display\n"
77        "    - without arguments: clear dot matrix display\n"
78);
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