From 3e666487683f0d8f5ff8d1d2b7924acb6989657f Mon Sep 17 00:00:00 2001
From: "Ben V. Brown" <Ralim@Ralimtek.com>
Date: Sun, 20 Nov 2022 18:43:43 +1100
Subject: [PATCH] Force full redraw on rotate

---
 source/Core/Drivers/OLED.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/source/Core/Drivers/OLED.cpp b/source/Core/Drivers/OLED.cpp
index 54574248..9210da51 100644
--- a/source/Core/Drivers/OLED.cpp
+++ b/source/Core/Drivers/OLED.cpp
@@ -361,13 +361,17 @@ void OLED::setRotation(bool leftHanded) {
     OLED_Setup_Array[9].val = 0xA0;
   }
   I2C_CLASS::writeRegistersBulk(DEVICEADDR_OLED, OLED_Setup_Array, sizeof(OLED_Setup_Array) / sizeof(OLED_Setup_Array[0]));
-
+  osDelay(TICKS_10MS);
   inLeftHandedMode = leftHanded;
 
   screenBuffer[5] = inLeftHandedMode ? 0 : 32;    // display is shifted by 32 in left handed
                                                   // mode as driver ram is 128 wide
   screenBuffer[7] = inLeftHandedMode ? 95 : 0x7F; // End address of the ram segment we are writing to (96 wide)
   screenBuffer[9] = inLeftHandedMode ? 0xC8 : 0xC0;
+  //Force a screen refresh
+  const int len  = FRAMEBUFFER_START + (OLED_WIDTH * 2);
+  I2C_CLASS::Transmit(DEVICEADDR_OLED, screenBuffer, len);
+  osDelay(TICKS_10MS);
 }
 
 void OLED::setBrightness(uint8_t contrast) {