From 5e10ebc2ac3c5e28007d1f0c7b95ae61130ed6e7 Mon Sep 17 00:00:00 2001
From: Martin Sekera <sekerama@gmail.com>
Date: Fri, 30 Jul 2021 00:31:31 +0200
Subject: [PATCH] fix crash on init caused by the previous change (2/2)

---
 fand.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/fand.py b/fand.py
index 0976568..b8ae87a 100755
--- a/fand.py
+++ b/fand.py
@@ -49,8 +49,12 @@ class PWM:
 		# acquire a duty cycle file descriptor
 		self.f_dc = open(self.ch_base + "duty_cycle", "w")
 		
-		# set 0 duty cycle so period can be freely set
-		self.set_duty_cycle(0)
+		# Set 0 duty cycle so period can be freely set even if the channel was used before.
+		# This may fail: ignore.
+		try:
+			self.set_duty_cycle(0)
+		except OSError:
+			pass
 		
 		# set period & polarity
 		with open(self.ch_base + "period", "w") as f: