From 4bbf07511979f3f918e316e80ba36ebac7f2bf9d Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Sun, 31 Oct 2021 17:16:34 +0100
Subject: pervasive aurora mb: add initialization code for flashless updates

---
 include/driver/pervasive_aurora_mb.h | 12 ++++-
 src/driver/pervasive_aurora_mb.cc    | 85 +++++++++++++++++++++++++++++++++---
 2 files changed, 90 insertions(+), 7 deletions(-)

diff --git a/include/driver/pervasive_aurora_mb.h b/include/driver/pervasive_aurora_mb.h
index 9d0bc86..558cba1 100644
--- a/include/driver/pervasive_aurora_mb.h
+++ b/include/driver/pervasive_aurora_mb.h
@@ -21,7 +21,17 @@ class PervasiveAuroraMb {
 
 		void setup();
 		void powerOn();
-		void initialize(signed char temperature = 20);
+
+		/**
+		 * Initializes the display
+		 * @param temperature specify ambient temperature, defaults to 20 deg C
+		 * @param flashless perform (fast) flashless updates. Note that this
+		 *        is not officially documented and, as far as I know,
+		 *        _perminantly_ alters the display's internal look-up tables. It
+		 *        may damage your display in the long run. Use at your own risk.
+		 */
+		void initialize(signed char temperature = 20, bool flashless = false);
+
 		void sendImage(unsigned char *frame, unsigned int x = 0, unsigned int y = 0, unsigned int w = 0, unsigned int h = 0);
 		void sendUpdate();
 		void powerOff();
diff --git a/src/driver/pervasive_aurora_mb.cc b/src/driver/pervasive_aurora_mb.cc
index b422916..0e14437 100644
--- a/src/driver/pervasive_aurora_mb.cc
+++ b/src/driver/pervasive_aurora_mb.cc
@@ -1,5 +1,6 @@
 /*
  * Copyright 2021 Daniel Friesel
+ * Copyright 2021 Amar Memic
  *
  * SPDX-License-Identifier: BSD-2-Clause
  *
@@ -31,7 +32,7 @@ void PervasiveAuroraMb::powerOn()
 	gpio.write(PERVASIVE_AURORA_CS_PIN, 1);
 }
 
-void PervasiveAuroraMb::initialize(signed char temperature)
+void PervasiveAuroraMb::initialize(signed char temperature, bool flashless)
 {
 	// "Input Temperature"
 	spiWrite(0xe5, (const unsigned char*)&temperature, 1);
@@ -40,10 +41,11 @@ void PervasiveAuroraMb::initialize(signed char temperature)
 	spiWrite(0xe0, (const unsigned char[]){0x02}, 1);
 
 	// "Panel Settings"
-	spiWrite(0x00, (const unsigned char[]){0x0f}, 1);
-
-	// "Panel Settings"
-	spiWrite(0x00, (const unsigned char[]){0x0f}, 1);
+	if (flashless) {
+		spiWrite(0x00, (const unsigned char[]){0x3f}, 1);
+	} else {
+		spiWrite(0x00, (const unsigned char[]){0x0f}, 1);
+	}
 
 	// "Booster soft start settings"
 	spiWrite(0x06, (const unsigned char[]){0x17, 0x17, 0x27}, 3);
@@ -52,10 +54,81 @@ void PervasiveAuroraMb::initialize(signed char temperature)
 	spiWrite(0x61, (const unsigned char[]){0x01, 0x90, 0x01, 0x2c}, 4);
 
 	// "Vcom and data interval setting"
-	spiWrite(0x50, (const unsigned char[]){0x87}, 1);
+	if (flashless) {
+		spiWrite(0x50, (const unsigned char[]){0x80}, 1);
+	} else {
+		spiWrite(0x50, (const unsigned char[]){0x87}, 1);
+	}
 
 	// "Power Saving"
 	spiWrite(0xe3, (const unsigned char[]){0x88}, 1);
+
+	if (flashless) {
+		// PLL
+		spiWrite(0x30, (const unsigned char[]){0x3d}, 1);
+
+		// VCom DC
+		spiWrite(0x82, (const unsigned char[]){0x0e}, 1);
+
+		// TCon
+		spiWrite(0x60, (const unsigned char[]){0x00}, 1);
+
+		// VCom LUT
+		spiWrite(0x20, (const unsigned char[]){
+				0x00, 0x06, 0x06, 0x06, 0x06, 0x01,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00
+			}, 44);
+
+		// W2B LUT
+		spiWrite(0x23, (const unsigned char[]){
+				0xaa, 0x06, 0x06, 0x06, 0x06, 0x01,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			}, 42);
+
+		// B2W LUT
+		spiWrite(0x22, (const unsigned char[]){
+				0x55, 0x06, 0x06, 0x06, 0x06, 0x01,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			}, 42);
+
+		// W2W LUT
+		spiWrite(0x21, (const unsigned char[]){
+				0x00, 0x06, 0x06, 0x06, 0x06, 0x01,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			}, 42);
+
+		// B2B LUT
+		spiWrite(0x24, (const unsigned char[]){
+				0xff, 0x06, 0x06, 0x06, 0x06, 0x01,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			}, 42);
+	}
 }
 
 void PervasiveAuroraMb::sendImage(unsigned char *frame, unsigned int x, unsigned int y, unsigned int w, unsigned int h)
-- 
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