[J-u-boot.git] / cmd / conitrace.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * The 'conitrace' command prints the codes received from the console input as
 * hexadecimal numbers.
 *
 * Copyright (c) 2018, Heinrich Schuchardt <[email protected]>
 */
#include <common.h>
#include <command.h>
#include <linux/delay.h>

static int do_conitrace(struct cmd_tbl *cmdtp, int flag, int argc,
			char *const argv[])
{
	bool first = true;

	printf("Waiting for your input\n");
	printf("To terminate type 'x'\n");

	/* Empty input buffer */
	while (tstc())
		getc();

	for (;;) {
		int c = getc();

		if (first && (c == 'x' || c == 'X'))
			break;

		printf("%02x ", c);
		first = false;

		/* 1 ms delay - serves to detect separate keystrokes */
		udelay(1000);
		if (!tstc()) {
			printf("\n");
			first = true;
		}
	}

	return CMD_RET_SUCCESS;
}

#ifdef CONFIG_SYS_LONGHELP
static char conitrace_help_text[] = "";
#endif

U_BOOT_CMD_COMPLETE(
	conitrace, 2, 0, do_conitrace,
	"trace console input",
	conitrace_help_text, NULL
);
Commit	Line	Data
29cfc096 HS	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 <[email protected]>
	7	*/
	8	#include <common.h>
	9	#include <command.h>
c05ed00a	10	#include <linux/delay.h>
29cfc096	11
09140113 SG	12	static int do_conitrace(struct cmd_tbl *cmdtp, int flag, int argc,
09140113 SG	13	char *const argv[])
29cfc096 HS	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	getc();
	23
	24	for (;;) {
	25	int c = getc();
	26
	27	if (first && (c == 'x' \|\| c == 'X'))
	28	break;
	29
	30	printf("%02x ", c);
	31	first = false;
	32
	33	/* 1 ms delay - serves to detect separate keystrokes */
	34	udelay(1000);
	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	);