From 0bcd7e000960d18db6d26813185fe0e2695bdfe6 Mon Sep 17 00:00:00 2001
From: John Crawford <coffeeboi47@protonmail.com>
Date: Tue, 17 Oct 2023 08:19:01 -0600
Subject: aod: lower voltage going to the display

---
 src/drivers/St7789.cpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'src/drivers/St7789.cpp')

diff --git a/src/drivers/St7789.cpp b/src/drivers/St7789.cpp
index 035d61c9..48b65acb 100644
--- a/src/drivers/St7789.cpp
+++ b/src/drivers/St7789.cpp
@@ -27,6 +27,7 @@ void St7789::Init() {
 #endif
   NormalModeOn();
   SetVdv();
+  PowerControl();
   DisplayOn();
 }
 
@@ -176,6 +177,19 @@ void St7789::DisplayOn() {
   WriteCommand(static_cast<uint8_t>(Commands::DisplayOn));
 }
 
+void St7789::PowerControl() {
+  WriteCommand(static_cast<uint8_t>(Commands::PowerControl1));
+  constexpr uint8_t args[] = {
+    0xa4, // Constant
+    0x00, // Lowest possible voltages
+  };
+  WriteData(args, sizeof(args));
+
+  WriteCommand(static_cast<uint8_t>(Commands::PowerControl2));
+  // Lowest possible boost circuit clocks
+  WriteData(0xb3);
+}
+
 void St7789::SetAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1) {
   WriteCommand(static_cast<uint8_t>(Commands::ColumnAddressSet));
   uint8_t colArgs[] = {
-- 
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