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 --- cmd/Kconfig | 6 ++++++ cmd/Makefile | 1 + cmd/conitrace.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 58 insertions(+) create mode 100644 cmd/conitrace.c

diff --git a/cmd/Kconfig b/cmd/Kconfig index 13d4c991bf..cf97a0f2be 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -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 diff --git a/cmd/Makefile b/cmd/Makefile index 3487c80455..88045dea97 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -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 diff --git a/cmd/conitrace.c b/cmd/conitrace.c new file mode 100644 index 0000000000..85c5422b7e --- /dev/null +++ b/cmd/conitrace.c @@ -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 +);