From a5b4105971a6978dd842b8638d4c6abab3ccbe32 Mon Sep 17 00:00:00 2001
From: Micha Nordmann <micnordmann@gmail.com>
Date: Mon, 21 Feb 2022 19:35:04 +0100
Subject: [PATCH] support for waveshare 7.50in-hd-b (#3239)

---
 .../components/waveshare_epaper/display.py    |   4 +
 .../waveshare_epaper/waveshare_epaper.cpp     | 101 ++++++++++++++++++
 .../waveshare_epaper/waveshare_epaper.h       |  20 ++++
 3 files changed, 125 insertions(+)

diff --git a/esphome/components/waveshare_epaper/display.py b/esphome/components/waveshare_epaper/display.py
index 44120ebbc5..fe5b51290e 100644
--- a/esphome/components/waveshare_epaper/display.py
+++ b/esphome/components/waveshare_epaper/display.py
@@ -50,6 +50,9 @@ WaveshareEPaper7P5InBV2 = waveshare_epaper_ns.class_(
 WaveshareEPaper7P5InV2 = waveshare_epaper_ns.class_(
     "WaveshareEPaper7P5InV2", WaveshareEPaper
 )
+WaveshareEPaper7P5InHDB = waveshare_epaper_ns.class_(
+    "WaveshareEPaper7P5InHDB", WaveshareEPaper
+)
 WaveshareEPaper2P13InDKE = waveshare_epaper_ns.class_(
     "WaveshareEPaper2P13InDKE", WaveshareEPaper
 )
@@ -76,6 +79,7 @@ MODELS = {
     "7.50in-bv2": ("b", WaveshareEPaper7P5InBV2),
     "7.50in-bc": ("b", WaveshareEPaper7P5InBC),
     "7.50inv2": ("b", WaveshareEPaper7P5InV2),
+    "7.50in-hd-b": ("b", WaveshareEPaper7P5InHDB),
     "2.13in-ttgo-dke": ("c", WaveshareEPaper2P13InDKE),
 }
 
diff --git a/esphome/components/waveshare_epaper/waveshare_epaper.cpp b/esphome/components/waveshare_epaper/waveshare_epaper.cpp
index 71e3b22e7d..59b3e90b03 100644
--- a/esphome/components/waveshare_epaper/waveshare_epaper.cpp
+++ b/esphome/components/waveshare_epaper/waveshare_epaper.cpp
@@ -1241,6 +1241,107 @@ void WaveshareEPaper7P5InBC::dump_config() {
   LOG_UPDATE_INTERVAL(this);
 }
 
+void WaveshareEPaper7P5InHDB::initialize() {
+  this->command(0x12);  // SWRESET
+
+  this->wait_until_idle_();  // waiting for the electronic paper IC to release the idle signal
+
+  this->command(0x46);  // Auto Write RAM
+  this->data(0xF7);
+
+  this->wait_until_idle_();  // waiting for the electronic paper IC to release the idle signal
+
+  this->command(0x47);  // Auto Write RAM
+  this->data(0xF7);
+
+  this->wait_until_idle_();  // waiting for the electronic paper IC to release the idle signal
+
+  this->command(0x0C);  // Soft start setting
+  this->data(0xAE);
+  this->data(0xC7);
+  this->data(0xC3);
+  this->data(0xC0);
+  this->data(0x40);
+
+  this->command(0x01);  // Set MUX as 527
+  this->data(0xAF);
+  this->data(0x02);
+  this->data(0x01);
+
+  this->command(0x11);  // Data entry mode
+  this->data(0x01);
+
+  this->command(0x44);
+  this->data(0x00);  // RAM x address start at 0
+  this->data(0x00);
+  this->data(0x6F);  // RAM x address end at 36Fh -> 879
+  this->data(0x03);
+
+  this->command(0x45);
+  this->data(0xAF);  // RAM y address start at 20Fh;
+  this->data(0x02);
+  this->data(0x00);  // RAM y address end at 00h;
+  this->data(0x00);
+
+  this->command(0x3C);  // VBD
+  this->data(0x01);     // LUT1, for white
+
+  this->command(0x18);
+  this->data(0X80);
+
+  this->command(0x22);
+  this->data(0XB1);  // Load Temperature and waveform setting.
+
+  this->command(0x20);
+
+  this->wait_until_idle_();  // waiting for the electronic paper IC to release the idle signal
+
+  this->command(0x4E);
+  this->data(0x00);
+  this->data(0x00);
+
+  this->command(0x4F);
+  this->data(0xAF);
+  this->data(0x02);
+}
+
+void HOT WaveshareEPaper7P5InHDB::display() {
+  this->command(0x4F);
+  this->data(0xAf);
+  this->data(0x02);
+
+  // BLACK
+  this->command(0x24);
+  this->start_data_();
+  this->write_array(this->buffer_, this->get_buffer_length_());
+  this->end_data_();
+
+  // RED
+  this->command(0x26);
+  this->start_data_();
+  for (size_t i = 0; i < this->get_buffer_length_(); i++)
+    this->write_byte(0x00);
+  this->end_data_();
+
+  this->command(0x22);
+  this->data(0xC7);
+  this->command(0x20);
+  delay(100);  // NOLINT
+}
+
+int WaveshareEPaper7P5InHDB::get_width_internal() { return 880; }
+
+int WaveshareEPaper7P5InHDB::get_height_internal() { return 528; }
+
+void WaveshareEPaper7P5InHDB::dump_config() {
+  LOG_DISPLAY("", "Waveshare E-Paper", this);
+  ESP_LOGCONFIG(TAG, "  Model: 7.5in-HD-b");
+  LOG_PIN("  Reset Pin: ", this->reset_pin_);
+  LOG_PIN("  DC Pin: ", this->dc_pin_);
+  LOG_PIN("  Busy Pin: ", this->busy_pin_);
+  LOG_UPDATE_INTERVAL(this);
+}
+
 static const uint8_t LUT_SIZE_TTGO_DKE_PART = 153;
 
 static const uint8_t PART_UPDATE_LUT_TTGO_DKE[LUT_SIZE_TTGO_DKE_PART] = {
diff --git a/esphome/components/waveshare_epaper/waveshare_epaper.h b/esphome/components/waveshare_epaper/waveshare_epaper.h
index 96bd2fc782..41b93978ab 100644
--- a/esphome/components/waveshare_epaper/waveshare_epaper.h
+++ b/esphome/components/waveshare_epaper/waveshare_epaper.h
@@ -350,6 +350,26 @@ class WaveshareEPaper7P5InV2 : public WaveshareEPaper {
   int get_height_internal() override;
 };
 
+class WaveshareEPaper7P5InHDB : public WaveshareEPaper {
+ public:
+  void initialize() override;
+
+  void display() override;
+
+  void dump_config() override;
+
+  void deep_sleep() override {
+    // deep sleep
+    this->command(0x10);
+    this->data(0x01);
+  }
+
+ protected:
+  int get_width_internal() override;
+
+  int get_height_internal() override;
+};
+
 class WaveshareEPaper2P13InDKE : public WaveshareEPaper {
  public:
   void initialize() override;