X-Git-Url: http://cloudbase.mooo.com/gitweb/z180-stamp.git/blobdiff_plain/8a2b0da07c62b1ab1d9d2240268fbf71f59421dd..b5251896f0f5eab98408808848b6236d234b370e:/avr/cmd_fat.c

diff --git a/avr/cmd_fat.c b/avr/cmd_fat.c
index 6519688..a1de1b6 100644
--- a/avr/cmd_fat.c
+++ b/avr/cmd_fat.c
@@ -281,9 +281,9 @@ command_ret_t do_cd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	(void) cmdtp; (void) flag; (void) argc;
 
 	if (argc < 2) {
-		arg = getenv_str(PSTR("HOME"));
+		arg = getenv_str(PSTR(ENV_HOME));
 		if (arg == NULL) {
-			printf_P(PSTR("%s: \"%S\" is not set\n"), argv[0], PSTR("HOME"));
+			printf_P(PSTR("%s: \"%S\" is not set\n"), argv[0], PSTR(ENV_HOME));
 			return CMD_RET_FAILURE;
 		}
 	} else
@@ -579,6 +579,15 @@ CMD_TBL_ITEM(
 	"      starting at address 'addr'.\n"
 ),
 
+CMD_TBL_ITEM(
+	help,	CONFIG_SYS_MAXARGS,	1,	do_help,
+	"Print sub command description/usage",
+	"\n"
+	"       - print brief description of all sub commands\n"
+	"fat help command ...\n"
+	"       - print detailed usage of sub cmd 'command'"
+),
+
 /* This does not use the CMD_TBL_ITEM macro as ? can't be used in symbol names */
 	{FSTR("?"),   CONFIG_SYS_MAXARGS, 1, do_help,
 	 FSTR("Alias for 'help'"),