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/*
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* (C) Copyright 2005 |
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
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* |
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* See file CREDITS for list of people who contributed to this |
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* project. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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*/ |
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#include <common.h> |
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#include <command.h> |
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#if (CONFIG_COMMANDS & CFG_CMD_DISPLAY) |
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#undef DEBUG_DISP |
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#define DISP_SIZE 8 |
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#define CWORD_CLEAR 0x80 |
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#define CLEAR_DELAY (110 * 2) |
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int do_display (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) |
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{ |
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int i; |
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int pos; |
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/* Clear display */ |
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*((volatile char*)(CFG_DISP_CWORD)) = CWORD_CLEAR; |
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udelay(1000 * CLEAR_DELAY); |
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if (argc < 2) |
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return (0); |
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for (pos = 0, i = 1; i < argc && pos < DISP_SIZE; i++) { |
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char *p = argv[i], c; |
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if (i > 1) { |
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*((volatile uchar *) (CFG_DISP_CHR_RAM + pos++)) = ' '; |
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#ifdef DEBUG_DISP |
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putc(' '); |
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#endif |
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} |
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while ((c = *p++) != '\0' && pos < DISP_SIZE) { |
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*((volatile uchar *) (CFG_DISP_CHR_RAM + pos++)) = c; |
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#ifdef DEBUG_DISP |
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putc(c); |
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#endif |
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} |
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} |
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#ifdef DEBUG_DISP |
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putc('\n'); |
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#endif |
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return (0); |
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} |
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/***************************************************/ |
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U_BOOT_CMD( |
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display, CFG_MAXARGS, 1, do_display, |
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"display- display string on dot matrix display\n", |
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"[<string>]\n" |
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" - with <string> argument: display <string> on dot matrix display\n" |
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" - without arguments: clear dot matrix display\n" |
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); |
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#endif /* CFG_CMD_DISPLAY */ |
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