From 084c61ed9f4192ea11ca494d0153333e11a22fb9 Mon Sep 17 00:00:00 2001
From: "Rufus V. Smith" <rufusvsmith@gmail.com>
Date: Mon, 6 Sep 2021 12:09:05 -0400
Subject: [PATCH] allow tone frequency of 0

---
 adafruit_magtag/peripherals.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/adafruit_magtag/peripherals.py b/adafruit_magtag/peripherals.py
index 6ee9ead..50d9da3 100755
--- a/adafruit_magtag/peripherals.py
+++ b/adafruit_magtag/peripherals.py
@@ -76,8 +76,8 @@ def play_tone(self, frequency, duration):
         It will attempt to play the sound up to 3 times in the case of
         an error.
         """
-        if frequency <= 0:
-            raise ValueError("The frequency has to be greater than 0.")
+        if frequency < 0:
+            raise ValueError("Negative frequencies are not allowed.")
         self._speaker_enable.value = True
         attempt = 0
         # Try up to 3 times to play the sound