From c47eacd010e743792d9567d8ddc81ba7cb64b56f Mon Sep 17 00:00:00 2001
From: Geoffrey Merck <F4FXL@users.noreply.github.com>
Date: Wed, 13 May 2020 21:02:19 +0200
Subject: [PATCH] Add define to use native port on Arduino

---
 Config.h          |  5 +++++
 SerialArduino.cpp | 23 +++++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/Config.h b/Config.h
index 73e716b..2715f49 100644
--- a/Config.h
+++ b/Config.h
@@ -52,6 +52,11 @@
 #define ARDUINO_DUE_ZUM_V10
 #endif
 
+// Use the native USB port instead of the programming port
+// The native port is recommended when using FM network
+// as the rpogramming port does not have the required throughput
+// #define ARDUINO_DUE_USE_NATIVE_USB_PORT
+
 // For the SP8NTH board
 // #define ARDUINO_DUE_NTH
 
diff --git a/SerialArduino.cpp b/SerialArduino.cpp
index db49759..fb79861 100644
--- a/SerialArduino.cpp
+++ b/SerialArduino.cpp
@@ -30,7 +30,11 @@ void CSerialPort::beginInt(uint8_t n, int speed)
 {
   switch (n) {
     case 1U:
+#if defined(ARDUINO_DUE_USE_NATIVE_USB_PORT)
+      SerialUSB.begin(speed);
+#else
       Serial.begin(speed);
+#endif
       break;
     case 2U:
       Serial2.begin(speed);
@@ -47,7 +51,11 @@ int CSerialPort::availableInt(uint8_t n)
 {
   switch (n) {
     case 1U:
+#if defined(ARDUINO_DUE_USE_NATIVE_USB_PORT)
+      return SerialUSB.available();
+#else
       return Serial.available();
+#endif
     case 2U:
       return Serial2.available();
     case 3U:
@@ -61,7 +69,11 @@ int CSerialPort::availableForWriteInt(uint8_t n)
 {
   switch (n) {
     case 1U:
+#if defined(ARDUINO_DUE_USE_NATIVE_USB_PORT)
+      return SerialUSB.availableForWrite();
+#else
       return Serial.availableForWrite();
+#endif
     case 2U:
       return Serial2.availableForWrite();
     case 3U:
@@ -75,7 +87,11 @@ uint8_t CSerialPort::readInt(uint8_t n)
 {
   switch (n) {
     case 1U:
+#if defined(ARDUINO_DUE_USE_NATIVE_USB_PORT)
+      return SerialUSB.read();
+#else
       return Serial.read();
+#endif
     case 2U:
       return Serial2.read();
     case 3U:
@@ -89,10 +105,17 @@ void CSerialPort::writeInt(uint8_t n, const uint8_t* data, uint16_t length, bool
 {
   switch (n) {
     case 1U:
+#if defined(ARDUINO_DUE_USE_NATIVE_USB_PORT)
+      SerialUSB.write(data, length);
+      if (flush)
+        SerialUSB.flush();
+      break;
+#else
       Serial.write(data, length);
       if (flush)
         Serial.flush();
       break;
+#endif
     case 2U:
       Serial2.write(data, length);
       if (flush)