From 315076375f516ed6ea5d74601d53677af83d9306 Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Mon, 25 Mar 2019 00:40:51 +0700
Subject: [PATCH] fix timer prio for freertos to blink led

---
 examples/device/cdc_msc_hid_freertos/ses/nrf5x/FreeRTOSConfig.h | 2 +-
 examples/device/cdc_msc_hid_freertos/src/main.c                 | 2 ++
 hw/bsp/pca10056/board_pca10056.c                                | 2 ++
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/examples/device/cdc_msc_hid_freertos/ses/nrf5x/FreeRTOSConfig.h b/examples/device/cdc_msc_hid_freertos/ses/nrf5x/FreeRTOSConfig.h
index 26df38d3d..754158622 100644
--- a/examples/device/cdc_msc_hid_freertos/ses/nrf5x/FreeRTOSConfig.h
+++ b/examples/device/cdc_msc_hid_freertos/ses/nrf5x/FreeRTOSConfig.h
@@ -83,7 +83,7 @@
 
 /* Software timer related definitions. */
 #define configUSE_TIMERS                       1
-#define configTIMER_TASK_PRIORITY              2
+#define configTIMER_TASK_PRIORITY              (configMAX_PRIORITIES-2)
 #define configTIMER_QUEUE_LENGTH               32
 #define configTIMER_TASK_STACK_DEPTH           configMINIMAL_STACK_SIZE
 
diff --git a/examples/device/cdc_msc_hid_freertos/src/main.c b/examples/device/cdc_msc_hid_freertos/src/main.c
index b5d5cf790..388bd9ad1 100644
--- a/examples/device/cdc_msc_hid_freertos/src/main.c
+++ b/examples/device/cdc_msc_hid_freertos/src/main.c
@@ -125,6 +125,8 @@ void cdc_task(void* params)
         tud_cdc_write_flush();
       }
     }
+
+    taskYIELD();
   }
 }
 
diff --git a/hw/bsp/pca10056/board_pca10056.c b/hw/bsp/pca10056/board_pca10056.c
index 923721fd7..90f466356 100644
--- a/hw/bsp/pca10056/board_pca10056.c
+++ b/hw/bsp/pca10056/board_pca10056.c
@@ -91,6 +91,8 @@ void board_init(void)
   SysTick_Config(SystemCoreClock/1000);
 #endif
 
+  // Priorities 0, 1, 4 (nRF52) are reserved for SoftDevice
+  // 2 is highest for application
   NVIC_SetPriority(USBD_IRQn, 2);
 
   // USB power may already be ready at this time -> no event generated