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/*
* (C) Copyright 2005
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <command.h>
#undef DEBUG_DISP
#define DISP_SIZE 8
#define CWORD_CLEAR 0x80
#define CLEAR_DELAY (110 * 2)
int do_display (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
int i;
int pos;
/* Clear display */
*((volatile char*)(CFG_DISP_CWORD)) = CWORD_CLEAR;
udelay(1000 * CLEAR_DELAY);
if (argc < 2)
return (0);
for (pos = 0, i = 1; i < argc && pos < DISP_SIZE; i++) {
char *p = argv[i], c;
if (i > 1) {
*((volatile uchar *) (CFG_DISP_CHR_RAM + pos++)) = ' ';
#ifdef DEBUG_DISP
putc(' ');
#endif
}
while ((c = *p++) != '\0' && pos < DISP_SIZE) {
*((volatile uchar *) (CFG_DISP_CHR_RAM + pos++)) = c;
#ifdef DEBUG_DISP
putc(c);
#endif
}
}
#ifdef DEBUG_DISP
putc('\n');
#endif
return (0);
}
/***************************************************/
U_BOOT_CMD(
display, CFG_MAXARGS, 1, do_display,
"display- display string on dot matrix display\n",
"[<string>]\n"
" - with <string> argument: display <string> on dot matrix display\n"
" - without arguments: clear dot matrix display\n"
);