From: ian <ian>
Date: Sun, 2 Jan 2005 17:40:58 +0000 (+0000)
Subject: usage message
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ijackson/git?a=commitdiff_plain;h=e2360ceb3d3eae4b4d7dafd6254f7a8296cd9b82;p=trains.git

usage message
---

diff --git a/hostside/main.c b/hostside/main.c
index a45403e..186bc1c 100644
--- a/hostside/main.c
+++ b/hostside/main.c
@@ -1,4 +1,11 @@
-/**/
+/*
+ * simple test harness for now
+ * asserts on usage errors
+ * usage:
+ *    ./hostside /dev/ttySn DATA               nmra
+ *    ./hostside /dev/ttySn DATA command       already encoded - raw transmit
+ * DATA is an even number of hex digits in a single arg
+ */
 
 #include <stdio.h>
 #include <string.h>