From 5155e9a0d540284a2f6e24b48f66b9d984228cbf Mon Sep 17 00:00:00 2001
From: Vladimir Zahradnik <vladimir@zahradnik.io>
Date: Thu, 6 Aug 2020 15:55:33 +0200
Subject: [PATCH 1/2] Add support for RS485 on Controllino Maxi/Mega

---
 src/RS485.cpp | 4 ++++
 src/RS485.h   | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/src/RS485.cpp b/src/RS485.cpp
index 2f018e7..92aa32e 100644
--- a/src/RS485.cpp
+++ b/src/RS485.cpp
@@ -166,4 +166,8 @@ void RS485Class::setPins(int txPin, int dePin, int rePin)
   _rePin = rePin;
 }
 
+#if defined(CONTROLLINO_MAXI) || defined(CONTROLLINO_MEGA)
+RS485Class RS485(SERIAL_PORT_HARDWARE3, CONTROLLINO_RS485_TX, CONTROLLINO_RS485_DE, CONTROLLINO_RS485_nRE);
+#else
 RS485Class RS485(SERIAL_PORT_HARDWARE, RS485_DEFAULT_TX_PIN, RS485_DEFAULT_DE_PIN, RS485_DEFAULT_RE_PIN);
+#endif
diff --git a/src/RS485.h b/src/RS485.h
index 24b976f..c6efa06 100644
--- a/src/RS485.h
+++ b/src/RS485.h
@@ -22,6 +22,10 @@
 
 #include <Arduino.h>
 
+#if defined(CONTROLLINO_MAXI) || defined(CONTROLLINO_MEGA)
+#include <Controllino.h>
+#endif
+
 #ifdef PIN_SERIAL1_TX
 #define RS485_DEFAULT_TX_PIN PIN_SERIAL1_TX
 #else

From a30126ccda3660bac22eb90e39d312748ad9af2e Mon Sep 17 00:00:00 2001
From: robert_faltus <robert@jsc-electronics.cz>
Date: Wed, 16 Sep 2020 17:30:00 +0200
Subject: [PATCH 2/2] ATmega2560 and ATmega328 update

---
 src/RS485.cpp |  4 ++++
 src/RS485.h   | 10 ++++++++++
 2 files changed, 14 insertions(+)

diff --git a/src/RS485.cpp b/src/RS485.cpp
index 92aa32e..0444b93 100644
--- a/src/RS485.cpp
+++ b/src/RS485.cpp
@@ -168,6 +168,10 @@ void RS485Class::setPins(int txPin, int dePin, int rePin)
 
 #if defined(CONTROLLINO_MAXI) || defined(CONTROLLINO_MEGA)
 RS485Class RS485(SERIAL_PORT_HARDWARE3, CONTROLLINO_RS485_TX, CONTROLLINO_RS485_DE, CONTROLLINO_RS485_nRE);
+#elif defined(__AVR_ATmega2560__)
+RS485Class RS485(Serial3, RS485_TX_PIN, RS485_DE_PIN, RS485_nRE_PIN);
+#elif defined(__AVR_ATmega328P__)
+RS485Class RS485(Serial, RS485_TX_PIN, RS485_DE_PIN, RS485_nRE_PIN);
 #else
 RS485Class RS485(SERIAL_PORT_HARDWARE, RS485_DEFAULT_TX_PIN, RS485_DEFAULT_DE_PIN, RS485_DEFAULT_RE_PIN);
 #endif
diff --git a/src/RS485.h b/src/RS485.h
index c6efa06..47cf15f 100644
--- a/src/RS485.h
+++ b/src/RS485.h
@@ -26,6 +26,16 @@
 #include <Controllino.h>
 #endif
 
+#if defined(__AVR_ATmega2560__)
+    #define RS485_DE_PIN    21
+    #define RS485_nRE_PIN   20
+    #define RS485_TX_PIN    14
+#elif defined(__AVR_ATmega328P__)       
+    #define RS485_DE_PIN    3
+    #define RS485_nRE_PIN   2
+    #define RS485_TX_PIN    1
+#endif
+
 #ifdef PIN_SERIAL1_TX
 #define RS485_DEFAULT_TX_PIN PIN_SERIAL1_TX
 #else