From 0c3568fad5f0cdc8f6f2c46ad05a2bbaf55a7f36 Mon Sep 17 00:00:00 2001
From: Matt Hamilton <matt@givemesecurity.info>
Date: Fri, 28 Jan 2022 06:37:47 -0500
Subject: [PATCH] Add support for Waveshare 7.5in-bv2 (#3121)

---
 .../components/waveshare_epaper/display.py    |  4 ++
 .../waveshare_epaper/waveshare_epaper.cpp     | 68 +++++++++++++++++++
 .../waveshare_epaper/waveshare_epaper.h       | 24 +++++++
 3 files changed, 96 insertions(+)

diff --git a/esphome/components/waveshare_epaper/display.py b/esphome/components/waveshare_epaper/display.py
index 1d1644dc25..44120ebbc5 100644
--- a/esphome/components/waveshare_epaper/display.py
+++ b/esphome/components/waveshare_epaper/display.py
@@ -44,6 +44,9 @@ WaveshareEPaper7P5In = waveshare_epaper_ns.class_(
 WaveshareEPaper7P5InBC = waveshare_epaper_ns.class_(
     "WaveshareEPaper7P5InBC", WaveshareEPaper
 )
+WaveshareEPaper7P5InBV2 = waveshare_epaper_ns.class_(
+    "WaveshareEPaper7P5InBV2", WaveshareEPaper
+)
 WaveshareEPaper7P5InV2 = waveshare_epaper_ns.class_(
     "WaveshareEPaper7P5InV2", WaveshareEPaper
 )
@@ -70,6 +73,7 @@ MODELS = {
     "4.20in-bv2": ("b", WaveshareEPaper4P2InBV2),
     "5.83in": ("b", WaveshareEPaper5P8In),
     "7.50in": ("b", WaveshareEPaper7P5In),
+    "7.50in-bv2": ("b", WaveshareEPaper7P5InBV2),
     "7.50in-bc": ("b", WaveshareEPaper7P5InBC),
     "7.50inv2": ("b", WaveshareEPaper7P5InV2),
     "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 b2d2d92bb2..71e3b22e7d 100644
--- a/esphome/components/waveshare_epaper/waveshare_epaper.cpp
+++ b/esphome/components/waveshare_epaper/waveshare_epaper.cpp
@@ -937,6 +937,74 @@ void WaveshareEPaper5P8In::dump_config() {
   LOG_PIN("  Busy Pin: ", this->busy_pin_);
   LOG_UPDATE_INTERVAL(this);
 }
+void WaveshareEPaper7P5InBV2::initialize() {
+  // COMMAND POWER SETTING
+  this->command(0x01);
+  this->data(0x07);
+  this->data(0x07);  // VGH=20V,VGL=-20V
+  this->data(0x3f);  // VDH=15V
+  this->data(0x3f);  // VDL=-15V
+  // COMMAND POWER ON
+  this->command(0x04);
+  delay(100);  // NOLINT
+  this->wait_until_idle_();
+  // COMMAND PANEL SETTING
+  this->command(0x00);
+  this->data(0x0F);     // KW3f, KWR-2F, BWROTP 0f, BWOTP 1f
+  this->command(0x61);  // tres
+  this->data(0x03);     // 800px
+  this->data(0x20);
+  this->data(0x01);  // 400px
+  this->data(0xE0);
+  this->command(0x15);
+  this->data(0x00);
+  // COMMAND VCOM AND DATA INTERVAL SETTING
+  this->command(0x50);
+  this->data(0x11);
+  this->data(0x07);
+  // COMMAND TCON SETTING
+  this->command(0x60);
+  this->data(0x22);
+  // COMMAND RESOLUTION SETTING
+  this->command(0x65);
+  this->data(0x00);
+  this->data(0x00);  // 800*480
+  this->data(0x00);
+  this->data(0x00);
+}
+void HOT WaveshareEPaper7P5InBV2::display() {
+  // COMMAND DATA START TRANSMISSION 1 (B/W data)
+  this->command(0x10);
+  delay(2);
+  this->start_data_();
+  this->write_array(this->buffer_, this->get_buffer_length_());
+  this->end_data_();
+  delay(2);
+
+  // COMMAND DATA START TRANSMISSION 2 (RED data)
+  this->command(0x13);
+  delay(2);
+  this->start_data_();
+  for (size_t i = 0; i < this->get_buffer_length_(); i++)
+    this->write_byte(0x00);
+  this->end_data_();
+  delay(2);
+
+  // COMMAND DISPLAY REFRESH
+  this->command(0x12);
+  delay(100);  // NOLINT
+  this->wait_until_idle_();
+}
+int WaveshareEPaper7P5InBV2::get_width_internal() { return 800; }
+int WaveshareEPaper7P5InBV2::get_height_internal() { return 480; }
+void WaveshareEPaper7P5InBV2::dump_config() {
+  LOG_DISPLAY("", "Waveshare E-Paper", this);
+  ESP_LOGCONFIG(TAG, "  Model: 7.5in-bv2");
+  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);
+}
 void WaveshareEPaper7P5In::initialize() {
   // COMMAND POWER SETTING
   this->command(0x01);
diff --git a/esphome/components/waveshare_epaper/waveshare_epaper.h b/esphome/components/waveshare_epaper/waveshare_epaper.h
index 4de2ac7d97..96bd2fc782 100644
--- a/esphome/components/waveshare_epaper/waveshare_epaper.h
+++ b/esphome/components/waveshare_epaper/waveshare_epaper.h
@@ -121,6 +121,7 @@ enum WaveshareEPaperTypeBModel {
   WAVESHARE_EPAPER_4_2_IN_B_V2,
   WAVESHARE_EPAPER_7_5_IN,
   WAVESHARE_EPAPER_7_5_INV2,
+  WAVESHARE_EPAPER_7_5_IN_B_V2,
 };
 
 class WaveshareEPaper2P7In : public WaveshareEPaper {
@@ -280,6 +281,29 @@ class WaveshareEPaper7P5In : public WaveshareEPaper {
   int get_height_internal() override;
 };
 
+class WaveshareEPaper7P5InBV2 : public WaveshareEPaper {
+ public:
+  void initialize() override;
+
+  void display() override;
+
+  void dump_config() override;
+
+  void deep_sleep() override {
+    // COMMAND POWER OFF
+    this->command(0x02);
+    this->wait_until_idle_();
+    // COMMAND DEEP SLEEP
+    this->command(0x07);  // deep sleep
+    this->data(0xA5);     // check byte
+  }
+
+ protected:
+  int get_width_internal() override;
+
+  int get_height_internal() override;
+};
+
 class WaveshareEPaper7P5InBC : public WaveshareEPaper {
  public:
   void initialize() override;