portOutputRegister is now writeable.

Author: cmaglie

build/shared/revisions.txt

@@ -2,6 +2,9 @@
 [ide]
 * Fixed IDE startup bug "Menu has no enabled items"
 
+[arduino core]
+* sam: portOutputRegister() is now writeable.
+
 ARDUINO BETA 1.5.1r2 - 2012.11.06
 
 * Fixed wrong release file for windows.

hardware/arduino/sam/variants/arduino_due_x/variant.cpp

@@ -352,6 +352,12 @@ void init( void )
   for (int i = 0; i < PINS_COUNT; i++)
 	  digitalWrite(i, LOW);
 
+  // Enable parallel access on PIO output data registers
+  PIOA->PIO_OWER = 0xFFFFFFFF;
+  PIOB->PIO_OWER = 0xFFFFFFFF;
+  PIOC->PIO_OWER = 0xFFFFFFFF;
+  PIOD->PIO_OWER = 0xFFFFFFFF;
+
   // Initialize Serial port U(S)ART pins
   PIO_Configure(
     g_APinDescription[PINS_UART].pPort,