From 523d19053edb9760026dffb70b791f3f93e4ea11 Mon Sep 17 00:00:00 2001
From: Jonas B <JonasB1997@aol.de>
Date: Sun, 27 Oct 2024 18:20:58 +0100
Subject: [PATCH] implemented BWR Mode for WaveshareEPaper7P5InBV3

---
 esphome/components/waveshare_epaper/display.py   |  6 +++---
 .../waveshare_epaper/waveshare_epaper.cpp        | 16 +++++++++++-----
 .../waveshare_epaper/waveshare_epaper.h          |  2 +-
 3 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/esphome/components/waveshare_epaper/display.py b/esphome/components/waveshare_epaper/display.py
index 4d3965449f..017f97c534 100644
--- a/esphome/components/waveshare_epaper/display.py
+++ b/esphome/components/waveshare_epaper/display.py
@@ -1,7 +1,7 @@
-import esphome.codegen as cg
-import esphome.config_validation as cv
 from esphome import core, pins
+import esphome.codegen as cg
 from esphome.components import display, spi
+import esphome.config_validation as cv
 from esphome.const import (
     CONF_BUSY_PIN,
     CONF_DC_PIN,
@@ -74,7 +74,7 @@ WaveshareEPaper7P5InBV2 = waveshare_epaper_ns.class_(
     "WaveshareEPaper7P5InBV2", WaveshareEPaper
 )
 WaveshareEPaper7P5InBV3 = waveshare_epaper_ns.class_(
-    "WaveshareEPaper7P5InBV3", WaveshareEPaper
+    "WaveshareEPaper7P5InBV3", WaveshareEPaperBWR
 )
 WaveshareEPaper7P5InV2 = waveshare_epaper_ns.class_(
     "WaveshareEPaper7P5InV2", WaveshareEPaper
diff --git a/esphome/components/waveshare_epaper/waveshare_epaper.cpp b/esphome/components/waveshare_epaper/waveshare_epaper.cpp
index 7c1d436673..f1bc835d30 100644
--- a/esphome/components/waveshare_epaper/waveshare_epaper.cpp
+++ b/esphome/components/waveshare_epaper/waveshare_epaper.cpp
@@ -2213,7 +2213,7 @@ void WaveshareEPaper7P5InBV3::init_display_() {
   this->wait_until_idle_();
   // COMMAND PANEL SETTING
   this->command(0x00);
-  this->data(0x3F);  // KW-3f   KWR-2F BWROTP 0f BWOTP 1f
+  this->data(0x0F);  // KW-3f   KWR-2F BWROTP 0f BWOTP 1f
 
   // COMMAND RESOLUTION SETTING
   this->command(0x61);
@@ -2226,7 +2226,7 @@ void WaveshareEPaper7P5InBV3::init_display_() {
   this->data(0x00);
   // COMMAND VCOM AND DATA INTERVAL SETTING
   this->command(0x50);
-  this->data(0x10);
+  this->data(0x20);
   this->data(0x00);
   // COMMAND TCON SETTING
   this->command(0x60);
@@ -2286,17 +2286,23 @@ void WaveshareEPaper7P5InBV3::init_display_() {
 };
 void HOT WaveshareEPaper7P5InBV3::display() {
   this->init_display_();
-  uint32_t buf_len = this->get_buffer_length_();
+  const uint32_t buf_len = this->get_buffer_length_() / 2u;
 
-  this->command(0x10);
+  /*this->command(0x10);
   for (uint32_t i = 0; i < buf_len; i++) {
     this->data(0xFF);
+  }*/
+
+  this->command(0x10);  // Start Transmission
+  delay(2);
+  for (uint32_t i = 0; i < buf_len; i++) {
+    this->data(this->buffer_[i]);
   }
 
   this->command(0x13);  // Start Transmission
   delay(2);
   for (uint32_t i = 0; i < buf_len; i++) {
-    this->data(~this->buffer_[i]);
+    this->data(this->buffer_[i + buf_len]);
   }
 
   this->command(0x12);  // Display Refresh
diff --git a/esphome/components/waveshare_epaper/waveshare_epaper.h b/esphome/components/waveshare_epaper/waveshare_epaper.h
index 7572982a20..97715f6552 100644
--- a/esphome/components/waveshare_epaper/waveshare_epaper.h
+++ b/esphome/components/waveshare_epaper/waveshare_epaper.h
@@ -581,7 +581,7 @@ class WaveshareEPaper7P5InBV2 : public WaveshareEPaper {
   int get_height_internal() override;
 };
 
-class WaveshareEPaper7P5InBV3 : public WaveshareEPaper {
+class WaveshareEPaper7P5InBV3 : public WaveshareEPaperBWR {
  public:
   bool wait_until_idle_();