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Diffstat (limited to 'cmd/conitrace.c')
-rw-r--r-- | cmd/conitrace.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/cmd/conitrace.c b/cmd/conitrace.c new file mode 100644 index 0000000..85c5422 --- /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 +); |