1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * The 'conitrace' command prints the codes received from the console input as
4 * hexadecimal numbers.
5 *
6 * Copyright (c) 2018, Heinrich Schuchardt <xypron.glpk@gmx.de>
7 */
8 #include <common.h>
9 #include <command.h>
10
do_conitrace(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])11 static int do_conitrace(cmd_tbl_t *cmdtp, int flag, int argc,
12 char * const argv[])
13 {
14 bool first = true;
15
16 printf("Waiting for your input\n");
17 printf("To terminate type 'x'\n");
18
19 /* Empty input buffer */
20 while (tstc())
21 getc();
22
23 for (;;) {
24 int c = getc();
25
26 if (first && (c == 'x' || c == 'X'))
27 break;
28
29 printf("%02x ", c);
30 first = false;
31
32 /* 1 ms delay - serves to detect separate keystrokes */
33 udelay(1000);
34 if (!tstc()) {
35 printf("\n");
36 first = true;
37 }
38 }
39
40 return CMD_RET_SUCCESS;
41 }
42
43 #ifdef CONFIG_SYS_LONGHELP
44 static char conitrace_help_text[] = "";
45 #endif
46
47 U_BOOT_CMD_COMPLETE(
48 conitrace, 2, 0, do_conitrace,
49 "trace console input",
50 conitrace_help_text, NULL
51 );
52