/* * (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> #if defined(CONFIG_CMD_DISPLAY) #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" ); #endif