From 0fb4504d3a82df58916d5edc445d4664da410620 Mon Sep 17 00:00:00 2001
From: Aidan Crowther <aidan.crowther@outlook.com>
Date: Fri, 4 Oct 2024 10:41:48 -0400
Subject: [PATCH] Added URSEL flag to fix ATMEGA8 functionality

---
 src/DMXSerial.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/DMXSerial.cpp b/src/DMXSerial.cpp
index 0a36c24..2a009ca 100644
--- a/src/DMXSerial.cpp
+++ b/src/DMXSerial.cpp
@@ -55,10 +55,22 @@ typedef enum {
 // receiver must accept 88 us break and 8 us MAB
 #define BREAKSPEED 100000L
 
+#if !defined(DMX_USE_PORT1) && defined(USART_RXC_vect)
+
+// ATMEGA8 requires that URSEL be set to 1 when writing to register UCSRC
+// This definition appends the required bit to the serial definition
+
+#define BREAKFORMAT (SERIAL_8E2 | (1<<URSEL))
+#define DMXFORMAT (SERIAL_8N2 | (1<<URSEL))
+#define DMXREADFORMAT (SERIAL_8N1 | (1<<URSEL))
+
+#else
+
 #define BREAKFORMAT SERIAL_8E2
 #define DMXFORMAT SERIAL_8N2
 #define DMXREADFORMAT SERIAL_8N1
 
+#endif
 
 // ----- include processor specific definitions and functions.