From da9ab4a7b44b3daed233d876f50c245ee4ee4229 Mon Sep 17 00:00:00 2001
From: mark9064 <30447455+mark9064@users.noreply.github.com>
Date: Mon, 23 Oct 2023 22:22:46 +0100
Subject: aod: lower lcd voltage

---
 src/drivers/St7789.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

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

diff --git a/src/drivers/St7789.cpp b/src/drivers/St7789.cpp
index 48b65acb..cdfa6a34 100644
--- a/src/drivers/St7789.cpp
+++ b/src/drivers/St7789.cpp
@@ -28,6 +28,7 @@ void St7789::Init() {
   NormalModeOn();
   SetVdv();
   PowerControl();
+  GateControl();
   DisplayOn();
 }
 
@@ -190,6 +191,12 @@ void St7789::PowerControl() {
   WriteData(0xb3);
 }
 
+void St7789::GateControl() {
+  WriteCommand(static_cast<uint8_t>(Commands::GateControl));
+  // Lowest possible VGL/VGH
+  WriteData(0x00);
+}
+
 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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