From 6ab799c7eb15918dfd86fb7bee982dc64b7fe53c Mon Sep 17 00:00:00 2001
From: Peter Lawrence <12226419+majbthrd@users.noreply.github.com>
Date: Tue, 11 Feb 2020 14:34:07 -0600
Subject: [PATCH] atomic GPIO operation in BSP

---
 hw/bsp/nutiny_sdk_nuc505/nutiny_sdk_nuc505.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/bsp/nutiny_sdk_nuc505/nutiny_sdk_nuc505.c b/hw/bsp/nutiny_sdk_nuc505/nutiny_sdk_nuc505.c
index e666a10aa..3a341de9a 100644
--- a/hw/bsp/nutiny_sdk_nuc505/nutiny_sdk_nuc505.c
+++ b/hw/bsp/nutiny_sdk_nuc505/nutiny_sdk_nuc505.c
@@ -93,8 +93,11 @@ void board_led_write(bool state)
 {
   uint32_t current = (state) ? LED_STATE_ON : (1-LED_STATE_ON);
   current <<= LED_PIN;
+  uint32_t irq_state = __get_PRIMASK();
+  __disable_irq();
   current |= LED_PORT->DOUT & ~(1UL << LED_PIN);
   LED_PORT->DOUT = current;
+  __set_PRIMASK(irq_state);
 }
 
 uint32_t board_button_read(void)