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 #include <linux/delay.h>
11
do_conitrace(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])12 static int do_conitrace(struct cmd_tbl *cmdtp, int flag, int argc,
13 char *const argv[])
14 {
15 bool first = true;
16
17 printf("Waiting for your input\n");
18 printf("To terminate type 'x'\n");
19
20 /* Empty input buffer */
21 while (tstc())
22 getchar();
23
24 for (;;) {
25 int c = getchar();
26
27 if (first && (c == 'x' || c == 'X'))
28 break;
29
30 printf("%02x ", c);
31 first = false;
32
33 /* 10 ms delay - serves to detect separate keystrokes */
34 udelay(10000);
35 if (!tstc()) {
36 printf("\n");
37 first = true;
38 }
39 }
40
41 return CMD_RET_SUCCESS;
42 }
43
44 #ifdef CONFIG_SYS_LONGHELP
45 static char conitrace_help_text[] = "";
46 #endif
47
48 U_BOOT_CMD_COMPLETE(
49 conitrace, 2, 0, do_conitrace,
50 "trace console input",
51 conitrace_help_text, NULL
52 );
53