Add FreeRTOS-Plus directory.

FreeRTOS/Demo/uIP_Demo_IAR_ARM7/EMAC/SAM7_EMAC.h

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+#ifndef SAM_7_EMAC_H
+#define SAM_7_EMAC_H
+
+
+/*
+ * Initialise the EMAC driver.  If successful a semaphore is returned that
+ * is used by the EMAC ISR to indicate that Rx packets have been received.
+ * If the initialisation fails then NULL is returned.
+ */
+xSemaphoreHandle xEMACInit( void );
+
+/*
+ * Send the current uIP buffer.  This copies the uIP buffer to one of the
+ * EMAC Tx buffers, then indicates to the EMAC that the buffer is ready.
+ */
+long lEMACSend( void );
+
+/*
+ * Called in response to an EMAC Rx interrupt.  Copies the received frame
+ * into the uIP buffer.
+ */
+unsigned long ulEMACPoll( void );
+
+#endif