From 678e3ff6467b88b64c418e1e37633e88afa95612 Mon Sep 17 00:00:00 2001
From: Martino Facchin <m.facchin@arduino.cc>
Date: Mon, 18 Oct 2021 09:49:37 +0200
Subject: [PATCH] UART: restore default buffer size to 256 bytes

Fixes #650
---
 cores/arduino/Uart.h | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/cores/arduino/Uart.h b/cores/arduino/Uart.h
index 6aa847839..8f2e812bb 100644
--- a/cores/arduino/Uart.h
+++ b/cores/arduino/Uart.h
@@ -22,7 +22,11 @@
 #include "SERCOM.h"
 #include "SafeRingBuffer.h"
 
-#define SERIAL_BUFFER_SIZE  64
+#ifdef SERIAL_BUFFER_SIZE
+#undef SERIAL_BUFFER_SIZE
+#endif
+
+#define SERIAL_BUFFER_SIZE  256
 
 class Uart : public arduino::HardwareSerial
 {
@@ -46,8 +50,9 @@ class Uart : public arduino::HardwareSerial
 
   private:
     SERCOM *sercom;
-    arduino::SafeRingBuffer rxBuffer;
-    arduino::SafeRingBuffer txBuffer;
+
+    arduino::SafeRingBufferN<SERIAL_BUFFER_SIZE> rxBuffer;
+    arduino::SafeRingBufferN<SERIAL_BUFFER_SIZE> txBuffer;
 
     uint8_t uc_pinRX;
     uint8_t uc_pinTX;