From 72035c14d032908930b66c1260a225a01200c6c8 Mon Sep 17 00:00:00 2001
From: Gergely Nagy <algernon@keyboard.io>
Date: Sat, 16 Dec 2017 14:30:18 +0100
Subject: Add support for host power management (suspend & wakeup)

Signed-off-by: Gergely Nagy <algernon@keyboard.io>
---
 Model01-Firmware.ino | 37 ++++++++++++++++++++++++++++++++++++-
 1 file changed, 36 insertions(+), 1 deletion(-)

diff --git a/Model01-Firmware.ino b/Model01-Firmware.ino
index 14d7efb..c8d3f2e 100644
--- a/Model01-Firmware.ino
+++ b/Model01-Firmware.ino
@@ -56,6 +56,9 @@
 // Support for Keyboardio's internal keyboard testing mode
 #include "Kaleidoscope-Model01-TestMode.h"
 
+// Support for host power management (suspend & wakeup)
+#include "Kaleidoscope-HostPowerManagement.h"
+
 
 /** This 'enum' is a list of all the macros used by the Model 01's firmware
   * The names aren't particularly important. What is important is that each
@@ -249,7 +252,32 @@ static kaleidoscope::LEDSolidColor solidBlue(0, 70, 130);
 static kaleidoscope::LEDSolidColor solidIndigo(0, 0, 170);
 static kaleidoscope::LEDSolidColor solidViolet(130, 0, 120);
 
+/** toggleLedsOnSuspendResume toggles the LEDs off when the host goes to sleep,
+ * and turns them back on when it wakes up.
+ */
+void toggleLedsOnSuspendResume(kaleidoscope::HostPowerManagement::Event event) {
+  switch (event) {
+  case kaleidoscope::HostPowerManagement::Suspend:
+    LEDControl.paused = true;
+    LEDControl.set_all_leds_to({0, 0, 0});
+    LEDControl.syncLeds();
+    break;
+  case kaleidoscope::HostPowerManagement::Resume:
+    LEDControl.paused = false;
+    LEDControl.refreshAll();
+    break;
+  case kaleidoscope::HostPowerManagement::Sleep:
+    break;
+  }
+}
 
+/** hostPowerManagementEventHandler dispatches power management events (suspend,
+ * resume, and sleep) to other functions that perform action based on these
+ * events.
+ */
+void hostPowerManagementEventHandler(kaleidoscope::HostPowerManagement::Event event) {
+  toggleLedsOnSuspendResume(event);
+}
 
 /** The 'setup' function is one of the two standard Arduino sketch functions.
   * It's called when your keyboard first powers up. This is where you set up
@@ -309,7 +337,11 @@ void setup() {
     &Macros,
 
     // The MouseKeys plugin lets you add keys to your keymap which move the mouse.
-    &MouseKeys
+    &MouseKeys,
+
+    // The HostPowerManagement plugin enables waking up the host from suspend,
+    // and allows us to turn LEDs off when it goes to sleep.
+    &HostPowerManagement
   );
 
   // While we hope to improve this in the future, the NumPad plugin
@@ -329,6 +361,9 @@ void setup() {
   // see https://github.com/keyboardio/Kaleidoscope-LED-Stalker
   StalkerEffect.variant = STALKER(BlazingTrail);
 
+  // We want the keyboard to be able to wake the host up from suspend.
+  HostPowerManagement.enableWakeup();
+
   // We want to make sure that the firmware starts with LED effects off
   // This avoids over-taxing devices that don't have a lot of power to share
   // with USB devices
-- 
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