From 5865add857faff2f4e08d1a12059a77f4bfe55ca Mon Sep 17 00:00:00 2001
From: todd-herbert <herbert.todd@gmail.com>
Date: Mon, 4 Mar 2024 02:13:56 +1300
Subject: [PATCH] E-Ink: fast refresh for Wireless Paper V1.1 (#3320)

---
 src/graphics/EInkDisplay2.cpp                 | 15 +--------------
 src/graphics/EInkDisplay2.h                   |  2 +-
 variants/heltec_wireless_paper/platformio.ini |  8 +++++++-
 variants/heltec_wireless_paper/variant.h      |  2 ++
 4 files changed, 11 insertions(+), 16 deletions(-)

diff --git a/src/graphics/EInkDisplay2.cpp b/src/graphics/EInkDisplay2.cpp
index d790e30c18..aee30c7f84 100644
--- a/src/graphics/EInkDisplay2.cpp
+++ b/src/graphics/EInkDisplay2.cpp
@@ -158,7 +158,7 @@ bool EInkDisplay::connect()
         }
     }
 
-#elif defined(HELTEC_WIRELESS_PAPER_V1_0)
+#elif defined(HELTEC_WIRELESS_PAPER_V1_0) || defined(HELTEC_WIRELESS_PAPER)
     {
         // Is this a normal boot, or a wake from deep sleep?
         esp_sleep_wakeup_cause_t wakeReason = esp_sleep_get_wakeup_cause();
@@ -194,19 +194,6 @@ bool EInkDisplay::connect()
         adafruitDisplay->init();
         adafruitDisplay->setRotation(3);
     }
-#elif defined(HELTEC_WIRELESS_PAPER)
-    {
-        hspi = new SPIClass(HSPI);
-        hspi->begin(PIN_EINK_SCLK, -1, PIN_EINK_MOSI, PIN_EINK_CS); // SCLK, MISO, MOSI, SS
-        delay(100);
-        pinMode(Vext, OUTPUT);
-        digitalWrite(Vext, LOW);
-        delay(100);
-        auto lowLevel = new EINK_DISPLAY_MODEL(PIN_EINK_CS, PIN_EINK_DC, PIN_EINK_RES, PIN_EINK_BUSY, *hspi);
-        adafruitDisplay = new GxEPD2_BW<EINK_DISPLAY_MODEL, EINK_DISPLAY_MODEL::HEIGHT>(*lowLevel);
-        adafruitDisplay->init();
-        adafruitDisplay->setRotation(3);
-    }
 #elif defined(PCA10059)
     {
         auto lowLevel = new EINK_DISPLAY_MODEL(PIN_EINK_CS, PIN_EINK_DC, PIN_EINK_RES, PIN_EINK_BUSY);
diff --git a/src/graphics/EInkDisplay2.h b/src/graphics/EInkDisplay2.h
index 3693781320..75770a3bcf 100644
--- a/src/graphics/EInkDisplay2.h
+++ b/src/graphics/EInkDisplay2.h
@@ -5,7 +5,7 @@
 #include "GxEPD2_BW.h"
 #include <OLEDDisplay.h>
 
-#if defined(HELTEC_WIRELESS_PAPER_V1_0)
+#if defined(HELTEC_WIRELESS_PAPER_V1_0) || defined(HELTEC_WIRELESS_PAPER)
 // Re-enable SPI after deep sleep: rtc_gpio_hold_dis()
 #include "driver/rtc_io.h"
 #endif
diff --git a/variants/heltec_wireless_paper/platformio.ini b/variants/heltec_wireless_paper/platformio.ini
index 56446dc8bb..0abbe085e8 100644
--- a/variants/heltec_wireless_paper/platformio.ini
+++ b/variants/heltec_wireless_paper/platformio.ini
@@ -8,9 +8,15 @@ build_flags =
   -D EINK_DISPLAY_MODEL=GxEPD2_213_FC1
   -D EINK_WIDTH=250
   -D EINK_HEIGHT=122
+  -D USE_EINK_DYNAMICDISPLAY            ; Enable Dynamic EInk
+  -D EINK_LIMIT_FASTREFRESH=10          ; How many consecutive fast-refreshes are permitted
+  -D EINK_LIMIT_RATE_BACKGROUND_SEC=30  ; Minimum interval between BACKGROUND updates
+  -D EINK_LIMIT_RATE_RESPONSIVE_SEC=1   ; Minimum interval between RESPONSIVE updates
+  -D EINK_LIMIT_GHOSTING_PX=2000        ; (Optional) How much image ghosting is tolerated
+  -D EINK_BACKGROUND_USES_FAST          ; (Optional) Use FAST refresh for both BACKGROUND and RESPONSIVE, until a limit is reached.
 lib_deps =
   ${esp32s3_base.lib_deps}
-  https://github.com/ixt/GxEPD2#39f325b677713eb04dfcc83b8e402e77523fb8bf
+  https://github.com/meshtastic/GxEPD2
   adafruit/Adafruit BusIO@^1.13.2
   lewisxhe/PCF8563_Library@^1.0.1
 upload_speed = 115200
\ No newline at end of file
diff --git a/variants/heltec_wireless_paper/variant.h b/variants/heltec_wireless_paper/variant.h
index c2a030ed07..28bc8628a5 100644
--- a/variants/heltec_wireless_paper/variant.h
+++ b/variants/heltec_wireless_paper/variant.h
@@ -5,6 +5,8 @@
 #define I2C_SCL SCL
 
 #define USE_EINK
+#define EINK_NO_HIBERNATE
+
 /*
  * eink display pins
  */