cmd/display.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2005
   4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5  */
   6
   7 #include <common.h>
   8 #include <command.h>
   9 #include <led-display.h>
  10
  11 #undef DEBUG_DISP
  12
  13 int do_display (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  14 {
  15         int i;
  16
  17         /* Clear display */
  18         display_set(DISPLAY_CLEAR | DISPLAY_HOME);
  19
  20         if (argc < 2)
  21                 return (0);
  22
  23         for (i = 1; i < argc; i++) {
  24                 char *p = argv[i];
  25
  26                 if (i > 1) { /* Insert a space between strings */
  27                         display_putc(' ');
  28                 }
  29
  30                 while ((*p)) {
  31 #ifdef DEBUG_DISP
  32                         putc(*p);
  33 #endif
  34                         display_putc(*p++);
  35                 }
  36         }
  37
  38 #ifdef DEBUG_DISP
  39         putc('\n');
  40 #endif
  41
  42         return (0);
  43 }
  44
  45 /***************************************************/
  46
  47 U_BOOT_CMD(
  48         display,        CONFIG_SYS_MAXARGS,     1,      do_display,
  49         "display string on dot matrix display",
  50         "[<string>]\n"
  51         "    - with <string> argument: display <string> on dot matrix display\n"
  52         "    - without arguments: clear dot matrix display"
  53 );