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cmd: add conitrace command

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The 'conitrace' command prints the codes received from the console input as
hexadecimal numbers.

This developer utility is useful for testing the handling of special keys
by keyboard drivers.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2018-09-07 19:43:11 +02:00 committed by Tom Rini
parent 03190a7888
commit 29cfc096a7
3 changed files with 58 additions and 0 deletions
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6
cmd/Kconfig
View File

@ -1338,6 +1338,12 @@ config CMD_CACHE
help
Enable the "icache" and "dcache" commands
config CMD_CONITRACE
bool "conitrace - trace console input codes"
help
Enable the 'conitrace' command which displays the codes received
from the console input as hexadecimal numbers.
config CMD_DISPLAY
bool "Enable the 'display' command, for character displays"
help

1
cmd/Makefile
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@ -34,6 +34,7 @@ obj-$(CONFIG_CMD_CACHE) += cache.o
obj-$(CONFIG_CMD_CBFS) += cbfs.o
obj-$(CONFIG_CMD_CLK) += clk.o
obj-$(CONFIG_CMD_CONFIG) += config.o
obj-$(CONFIG_CMD_CONITRACE) += conitrace.o
obj-$(CONFIG_CMD_CONSOLE) += console.o
obj-$(CONFIG_CMD_CPU) += cpu.o
obj-$(CONFIG_DATAFLASH_MMC_SELECT) += dataflash_mmc_mux.o

51
cmd/conitrace.c Normal file
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@ -0,0 +1,51 @@
// 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 <xypron.glpk@gmx.de>
*/
#include <common.h>
#include <command.h>
static int do_conitrace(cmd_tbl_t *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
);