From 25f6d395bc335d884690ce556a22dc848f213da2 Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Fri, 21 Dec 2018 14:48:04 +0700
Subject: [PATCH] fix neopixel didn't turn off after dfu cdc

---
 src/boards.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/boards.c b/src/boards.c
index 36ca080..be8dd6c 100644
--- a/src/boards.c
+++ b/src/boards.c
@@ -347,9 +347,10 @@ void neopixel_init(void)
 void neopixel_teardown(void)
 {
   uint8_t grb[3] = { 0, 0, 0 };
-  neopixel_write(grb);
 
-  NRFX_DELAY_US(100);
+  NRFX_DELAY_US(100);  // wait for previous write is complete
+  neopixel_write(grb);
+  NRFX_DELAY_US(100);  // wait for this write
 
   pwm_teardown(NRF_PWM2);
 }