From 2115479ab959d66ef8b5b24d879e837f5c492ed7 Mon Sep 17 00:00:00 2001
From: Neil Gershenfeld <gersh@cba.mit.edu>
Date: Sat, 24 Jun 2023 12:28:39 -0400
Subject: [PATCH] wip

---
 upy.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/upy.py b/upy.py
index dfda5be..4a33a96 100644
--- a/upy.py
+++ b/upy.py
@@ -21,6 +21,7 @@ char_delay = 0.0001
 import sys,serial,time
 if (len(sys.argv) < 3):
    print("upy.py port command [arguments]")
+   sys.exit()
 s = serial.Serial(sys.argv[1])
 s.write(b'\r\n\x03\r\n') # ^c break
 s.write(b'\x01') # ^a enter raw mode
-- 
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