From 071a014ac166cd25b3cf7315c643026a26e712cf Mon Sep 17 00:00:00 2001
From: Wesley Moore <wes@wezm.net>
Date: Wed, 14 Nov 2018 15:35:10 +1100
Subject: [PATCH] Implement deep_sleep on Display

---
 src/command.rs | 8 ++++----
 src/display.rs | 5 ++---
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/src/command.rs b/src/command.rs
index a98e4c3..e0bf611 100644
--- a/src/command.rs
+++ b/src/command.rs
@@ -45,9 +45,9 @@ pub enum DeepSleepMode {
     /// Not sleeping
     Normal,
     /// Deep sleep with RAM preserved
-    Mode1,
+    PreserveRAM,
     /// Deep sleep RAM not preserved
-    Mode2,
+    DiscardRAM,
 }
 
 pub enum Command {
@@ -233,8 +233,8 @@ impl Command {
             DeepSleepMode(mode) => {
                 let mode = match mode {
                     self::DeepSleepMode::Normal => 0b00,
-                    self::DeepSleepMode::Mode1 => 0b01,
-                    self::DeepSleepMode::Mode2 => 0b11,
+                    self::DeepSleepMode::PreserveRAM => 0b01,
+                    self::DeepSleepMode::DiscardRAM => 0b11,
                 };
 
                 pack!(buf, 0x10, [mode])
diff --git a/src/display.rs b/src/display.rs
index da6ca6d..56d5749 100644
--- a/src/display.rs
+++ b/src/display.rs
@@ -1,6 +1,6 @@
 use hal;
 
-use command::{BufCommand, Command, DataEntryMode, IncrementAxis};
+use command::{BufCommand, Command, DataEntryMode, DeepSleepMode, IncrementAxis};
 use interface::DisplayInterface;
 
 // Max display resolution is 160x296
@@ -90,7 +90,6 @@ impl<I> Display<I> where I: DisplayInterface {
     }
 
     fn deep_sleep(&mut self) -> Result<(), I::Error> {
-        // TODO: Send DeepSleep command
-        unimplemented!()
+        Command::DeepSleepMode(DeepSleepMode::PreserveRAM).execute(&mut self.interface)
     }
 }