From 612108066d4195ecd52481e04ae7b480f73a8cb5 Mon Sep 17 00:00:00 2001
From: Knutwurst <36196269+knutwurst@users.noreply.github.com>
Date: Tue, 2 Jun 2020 19:18:23 +0200
Subject: [PATCH] Fix ringbuffer in serial connection between Mainboard and
 Touchscreen.

---
 Marlin/src/lcd/anycubic_serial.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Marlin/src/lcd/anycubic_serial.cpp b/Marlin/src/lcd/anycubic_serial.cpp
index cb084925..a63f0ca5 100755
--- a/Marlin/src/lcd/anycubic_serial.cpp
+++ b/Marlin/src/lcd/anycubic_serial.cpp
@@ -66,7 +66,7 @@ ring_buffer tx_buffer_ajg = {{0}, 0, 0};
 
 inline void store_char(unsigned char c, ring_buffer *buffer)
 {
-  int i = (unsigned int)(buffer->head + 1) % SERIAL_BUFFER_SIZE;
+  unsigned int i = ((unsigned int)(buffer->head + 1)) % SERIAL_BUFFER_SIZE;
 
   // if we should be storing the received character into the location
   // just before the tail (meaning that the head would advance to the