From eff20deb27ccde721d78dbade8b57787479d6c91 Mon Sep 17 00:00:00 2001
From: Collin Kidder <collink@kkmfg.com>
Date: Wed, 24 Dec 2014 10:36:40 -0500
Subject: [PATCH] Add ability to set interrupt priority for UART/USARTs.

---
 hardware/arduino/sam/cores/arduino/UARTClass.cpp | 10 ++++++++++
 hardware/arduino/sam/cores/arduino/UARTClass.h   |  2 ++
 2 files changed, 12 insertions(+)

diff --git a/hardware/arduino/sam/cores/arduino/UARTClass.cpp b/hardware/arduino/sam/cores/arduino/UARTClass.cpp
index 99e7219b5..6ff9d932f 100644
--- a/hardware/arduino/sam/cores/arduino/UARTClass.cpp
+++ b/hardware/arduino/sam/cores/arduino/UARTClass.cpp
@@ -90,6 +90,16 @@ void UARTClass::end( void )
   pmc_disable_periph_clk( _dwId ) ;
 }
 
+void UARTClass::setInterruptPriority(uint32_t priority)
+{
+	NVIC_SetPriority(_dwIrq, priority & 0x0F);
+}
+
+uint32_t UARTClass::getInterruptPriority()
+{
+	return NVIC_GetPriority(_dwIrq);
+}
+
 int UARTClass::available( void )
 {
   return (uint32_t)(SERIAL_BUFFER_SIZE + _rx_buffer->_iHead - _rx_buffer->_iTail) % SERIAL_BUFFER_SIZE ;
diff --git a/hardware/arduino/sam/cores/arduino/UARTClass.h b/hardware/arduino/sam/cores/arduino/UARTClass.h
index 6c513374f..b60fae3d0 100644
--- a/hardware/arduino/sam/cores/arduino/UARTClass.h
+++ b/hardware/arduino/sam/cores/arduino/UARTClass.h
@@ -48,6 +48,8 @@ class UARTClass : public HardwareSerial
     int read( void ) ;
     void flush( void ) ;
     size_t write( const uint8_t c ) ;
+	void setInterruptPriority(uint32_t priority);
+	uint32_t getInterruptPriority();
 
     void IrqHandler( void ) ;