From a66dec738dba1bc1c4712ac561e731f7c5fedf00 Mon Sep 17 00:00:00 2001
From: Lucas Prim <lucas.prim@gmail.com>
Date: Mon, 27 Nov 2023 20:40:39 -0300
Subject: [PATCH] Implement deep sleep and clear screen on Waveshare 7.5in B V3
 (#5239)

---
 .../waveshare_epaper/waveshare_epaper.cpp     | 20 ++++++++++---------
 .../waveshare_epaper/waveshare_epaper.h       |  4 ++++
 2 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/esphome/components/waveshare_epaper/waveshare_epaper.cpp b/esphome/components/waveshare_epaper/waveshare_epaper.cpp
index f52808d295..53bfa57f4f 100644
--- a/esphome/components/waveshare_epaper/waveshare_epaper.cpp
+++ b/esphome/components/waveshare_epaper/waveshare_epaper.cpp
@@ -1329,6 +1329,7 @@ void WaveshareEPaper7P5InBV2::dump_config() {
   LOG_UPDATE_INTERVAL(this);
 }
 
+void WaveshareEPaper7P5InBV3::initialize() { this->init_display_(); }
 bool WaveshareEPaper7P5InBV3::wait_until_idle_() {
   if (this->busy_pin_ == nullptr) {
     return true;
@@ -1341,12 +1342,13 @@ bool WaveshareEPaper7P5InBV3::wait_until_idle_() {
       ESP_LOGI(TAG, "Timeout while displaying image!");
       return false;
     }
+    App.feed_wdt();
     delay(10);
   }
   delay(200);  // NOLINT
   return true;
 };
-void WaveshareEPaper7P5InBV3::initialize() {
+void WaveshareEPaper7P5InBV3::init_display_() {
   this->reset_();
 
   // COMMAND POWER SETTING
@@ -1402,8 +1404,6 @@ void WaveshareEPaper7P5InBV3::initialize() {
   this->data(0x00);
   this->data(0x00);
 
-  this->wait_until_idle_();
-
   uint8_t lut_vcom_7_i_n5_v2[] = {
       0x0, 0xF, 0xF, 0x0, 0x0, 0x1, 0x0, 0xF, 0x1, 0xF, 0x1, 0x2, 0x0, 0xF, 0xF, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0,
       0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
@@ -1449,24 +1449,26 @@ void WaveshareEPaper7P5InBV3::initialize() {
   this->command(0x24);  // LUTBB
   for (count = 0; count < 42; count++)
     this->data(lut_bb_7_i_n5_v2[count]);
-
-  this->command(0x10);
-  for (uint32_t i = 0; i < 800 * 480 / 8; i++) {
-    this->data(0xFF);
-  }
 };
 void HOT WaveshareEPaper7P5InBV3::display() {
+  this->init_display_();
   uint32_t buf_len = this->get_buffer_length_();
 
+  this->command(0x10);
+  for (uint32_t i = 0; i < buf_len; i++) {
+    this->data(0xFF);
+  }
+
   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]);
   }
 
   this->command(0x12);  // Display Refresh
   delay(100);           // NOLINT
   this->wait_until_idle_();
+  this->deep_sleep();
 }
 int WaveshareEPaper7P5InBV3::get_width_internal() { return 800; }
 int WaveshareEPaper7P5InBV3::get_height_internal() { return 480; }
diff --git a/esphome/components/waveshare_epaper/waveshare_epaper.h b/esphome/components/waveshare_epaper/waveshare_epaper.h
index c800d29643..f6ccf90861 100644
--- a/esphome/components/waveshare_epaper/waveshare_epaper.h
+++ b/esphome/components/waveshare_epaper/waveshare_epaper.h
@@ -429,6 +429,8 @@ class WaveshareEPaper7P5InBV3 : public WaveshareEPaper {
     this->data(0xA5);
   }
 
+  void clear_screen();
+
  protected:
   int get_width_internal() override;
 
@@ -444,6 +446,8 @@ class WaveshareEPaper7P5InBV3 : public WaveshareEPaper {
       delay(200);  // NOLINT
     }
   };
+
+  void init_display_();
 };
 
 class WaveshareEPaper7P5InBC : public WaveshareEPaper {