From 152989ba1c2cd61620f18d145b805e75adc1ef2a Mon Sep 17 00:00:00 2001
From: Ned Konz <ned@productcreationstudio.com>
Date: Wed, 19 Oct 2011 18:55:56 -0700
Subject: [PATCH] Added usage prompt to flash utility

---
 flash/main.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/flash/main.c b/flash/main.c
index 0fd7232..a443f95 100644
--- a/flash/main.c
+++ b/flash/main.c
@@ -17,6 +17,11 @@ struct opts
   size_t size;
 };
 
+static void usage(void)
+{
+    puts("stlinkv1 command line: ./flash {read|write} /dev/sgX path addr <size>");
+    puts("stlinkv2 command line: ./flash {read|write} path addr <size>");
+}
 
 static int get_opts(struct opts* o, int ac, char** av)
 {
@@ -75,6 +80,7 @@ int main(int ac, char** av)
   if (get_opts(&o, ac - 1, av + 1) == -1)
   {
     printf("invalid command line\n");
+    usage();
     goto on_error;
   }
 
-- 
2.30.2