From f9e1fc119dfd08a6c383bc6572e1acd933578c98 Mon Sep 17 00:00:00 2001
From: root <dwputz@gmail.com>
Date: Tue, 23 Aug 2022 15:17:54 -0500
Subject: [PATCH] Fix handling of zero-length pulseout pulse

---
 ports/nrf/common-hal/pulseio/PulseOut.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ports/nrf/common-hal/pulseio/PulseOut.c b/ports/nrf/common-hal/pulseio/PulseOut.c
index 1c3c317a05..d282043be7 100644
--- a/ports/nrf/common-hal/pulseio/PulseOut.c
+++ b/ports/nrf/common-hal/pulseio/PulseOut.c
@@ -74,6 +74,11 @@ static void pulseout_event_handler(nrf_timer_event_t event_type, void *p_context
     nrfx_timer_pause(timer);
 
     pulse_array_index++;
+    // Ignore a zero-length pulse
+    while (pulse_array[pulse_array_index] == 0 &&
+           pulse_array_index < pulse_array_length) {
+        pulse_array_index++;
+    }
 
     // No more pulses. Turn off output and don't restart.
     if (pulse_array_index >= pulse_array_length) {