cmd/display.c

   1 /*
   2  * (C) Copyright 2005
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <command.h>
  10 #include <led-display.h>
  11
  12 #undef DEBUG_DISP
  13
  14 int do_display (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  15 {
  16         int i;
  17
  18         /* Clear display */
  19         display_set(DISPLAY_CLEAR | DISPLAY_HOME);
  20
  21         if (argc < 2)
  22                 return (0);
  23
  24         for (i = 1; i < argc; i++) {
  25                 char *p = argv[i];
  26
  27                 if (i > 1) { /* Insert a space between strings */
  28                         display_putc(' ');
  29                 }
  30
  31                 while ((*p)) {
  32 #ifdef DEBUG_DISP
  33                         putc(*p);
  34 #endif
  35                         display_putc(*p++);
  36                 }
  37         }
  38
  39 #ifdef DEBUG_DISP
  40         putc('\n');
  41 #endif
  42
  43         return (0);
  44 }
  45
  46 /***************************************************/
  47
  48 U_BOOT_CMD(
  49         display,        CONFIG_SYS_MAXARGS,     1,      do_display,
  50         "display string on dot matrix display",
  51         "[<string>]\n"
  52         "    - with <string> argument: display <string> on dot matrix display\n"
  53         "    - without arguments: clear dot matrix display"
  54 );