From 77940e392f868761d0c4cef4409a52d55b5948d0 Mon Sep 17 00:00:00 2001
From: David <6517959+powelllens@users.noreply.github.com>
Date: Mon, 18 Jul 2022 15:31:55 +0200
Subject: [PATCH] Update epd4in2b_V2.cpp

Bugfix to allow X Positions > 256. According to the PDF -> RED must be greater than HRST. This is currently not the case for x > 256.
---
 Arduino/epd4in2b_V2/epd4in2b_V2.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Arduino/epd4in2b_V2/epd4in2b_V2.cpp b/Arduino/epd4in2b_V2/epd4in2b_V2.cpp
index 94a8b2026..a9f0cc6a2 100644
--- a/Arduino/epd4in2b_V2/epd4in2b_V2.cpp
+++ b/Arduino/epd4in2b_V2/epd4in2b_V2.cpp
@@ -104,7 +104,7 @@ void Epd::SetPartialWindow(const unsigned char* buffer_black, const unsigned cha
     SendCommand(PARTIAL_WINDOW);
     SendData(x >> 8);
     SendData(x & 0xf8);     // x should be the multiple of 8, the last 3 bit will always be ignored
-    SendData(((x & 0xf8) + w  - 1) >> 8);
+    SendData((x + w  - 1) >> 8);
     SendData(((x & 0xf8) + w  - 1) | 0x07);
     SendData(y >> 8);        
     SendData(y & 0xff);
@@ -137,7 +137,7 @@ void Epd::SetPartialWindowBlack(const unsigned char* buffer_black, int x, int y,
     SendCommand(PARTIAL_WINDOW);
     SendData(x >> 8);
     SendData(x & 0xf8);     // x should be the multiple of 8, the last 3 bit will always be ignored
-    SendData(((x & 0xf8) + w  - 1) >> 8);
+    SendData((x + w  - 1) >> 8);
     SendData(((x & 0xf8) + w  - 1) | 0x07);
     SendData(y >> 8);        
     SendData(y & 0xff);