From 41c0624459cbb22ca47f105eb113617e2d7bafa4 Mon Sep 17 00:00:00 2001
From: Robert Fisk <robert_fisk@fastmail.fm>
Date: Mon, 24 Oct 2016 12:20:32 +1300
Subject: [PATCH] Startup LED flash is now asynchronous.

Not only a faster startup process, but also catches some HID devices
that only work if initialised within 500ms of powerup.
---
 Downstream/Src/led.c | 15 +++++++++++----
 Upstream/Src/led.c   | 15 +++++++++++----
 2 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/Downstream/Src/led.c b/Downstream/Src/led.c
index d38f4bc..89ad590 100644
--- a/Downstream/Src/led.c
+++ b/Downstream/Src/led.c
@@ -18,15 +18,13 @@
 uint16_t    FaultLedBlinkRate       = 0;
 uint16_t    FaultLedBlinkCounter    = 0;
 uint8_t     FaultLedState           = 0;
+uint8_t     StartupBlinkActive;
 
 
 void LED_Init(void)
 {
-    //RUN_LED_ON;
     FAULT_LED_ON;
-    HAL_Delay(STARTUP_FLASH_DELAY);
-    //RUN_LED_OFF;
-    FAULT_LED_OFF;
+    StartupBlinkActive = 1;
 }
 
 
@@ -43,6 +41,15 @@ void LED_Fault_SetBlinkRate(uint16_t newBlinkRate)
 
 void LED_DoBlinks(void)
 {
+    if (StartupBlinkActive)
+    {
+        if (HAL_GetTick() >= STARTUP_FLASH_DELAY)
+        {
+            FAULT_LED_OFF;
+            StartupBlinkActive = 0;
+        }
+    }
+
     if (FaultLedBlinkRate > 0)
     {
         FaultLedBlinkCounter++;
diff --git a/Upstream/Src/led.c b/Upstream/Src/led.c
index d38f4bc..89ad590 100644
--- a/Upstream/Src/led.c
+++ b/Upstream/Src/led.c
@@ -18,15 +18,13 @@
 uint16_t    FaultLedBlinkRate       = 0;
 uint16_t    FaultLedBlinkCounter    = 0;
 uint8_t     FaultLedState           = 0;
+uint8_t     StartupBlinkActive;
 
 
 void LED_Init(void)
 {
-    //RUN_LED_ON;
     FAULT_LED_ON;
-    HAL_Delay(STARTUP_FLASH_DELAY);
-    //RUN_LED_OFF;
-    FAULT_LED_OFF;
+    StartupBlinkActive = 1;
 }
 
 
@@ -43,6 +41,15 @@ void LED_Fault_SetBlinkRate(uint16_t newBlinkRate)
 
 void LED_DoBlinks(void)
 {
+    if (StartupBlinkActive)
+    {
+        if (HAL_GetTick() >= STARTUP_FLASH_DELAY)
+        {
+            FAULT_LED_OFF;
+            StartupBlinkActive = 0;
+        }
+    }
+
     if (FaultLedBlinkRate > 0)
     {
         FaultLedBlinkCounter++;