From fd7e861ff5395d360f894de344ecc2df741cf522 Mon Sep 17 00:00:00 2001
From: "Andrew J.Swan" <ajs.blackhole@gmail.com>
Date: Mon, 4 Apr 2022 02:13:59 +0300
Subject: [PATCH] Added a function to load custom characters in LCD display
 (#3279)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
---
 esphome/components/lcd_base/lcd_display.cpp | 7 +++++++
 esphome/components/lcd_base/lcd_display.h   | 3 +++
 2 files changed, 10 insertions(+)

diff --git a/esphome/components/lcd_base/lcd_display.cpp b/esphome/components/lcd_base/lcd_display.cpp
index b937e36c6c..180d5e93ac 100644
--- a/esphome/components/lcd_base/lcd_display.cpp
+++ b/esphome/components/lcd_base/lcd_display.cpp
@@ -167,6 +167,13 @@ void LCDDisplay::strftime(uint8_t column, uint8_t row, const char *format, time:
 }
 void LCDDisplay::strftime(const char *format, time::ESPTime time) { this->strftime(0, 0, format, time); }
 #endif
+void LCDDisplay::loadchar(uint8_t location, uint8_t charmap[]) {
+  location &= 0x7;  // we only have 8 locations 0-7
+  this->command_(LCD_DISPLAY_COMMAND_SET_CGRAM_ADDR | (location << 3));
+  for (int i = 0; i < 8; i++) {
+    this->send(charmap[i], true);
+  }
+}
 
 }  // namespace lcd_base
 }  // namespace esphome
diff --git a/esphome/components/lcd_base/lcd_display.h b/esphome/components/lcd_base/lcd_display.h
index 0c9e59758c..c8ba39f0d4 100644
--- a/esphome/components/lcd_base/lcd_display.h
+++ b/esphome/components/lcd_base/lcd_display.h
@@ -51,6 +51,9 @@ class LCDDisplay : public PollingComponent {
   void strftime(const char *format, time::ESPTime time) __attribute__((format(strftime, 2, 0)));
 #endif
 
+  /// Load custom char to given location
+  void loadchar(uint8_t location, uint8_t charmap[]);
+
  protected:
   virtual bool is_four_bit_mode() = 0;
   virtual void write_n_bits(uint8_t value, uint8_t n) = 0;