--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Output/pjrcUSB/arm/usb_rawio.c	Tue May 31 00:19:45 2016 -0700
@@ -0,0 +1,141 @@
+/* Copyright (C) 2016 by Jacob Alexander
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <kll_defs.h>
+#if enableRawIO_define == 1
+
+// ----- Includes -----
+
+// Compiler Includes
+#include <string.h> // For memcpy
+
+// Project Includes
+#include <Lib/OutputLib.h>
+#include <print.h>
+
+// Local Includes
+#include "usb_dev.h"
+#include "usb_rawio.h"
+
+
+
+// ----- Defines -----
+
+// Maximum number of transmit packets to queue so we don't starve other endpoints for memory
+#define TX_PACKET_LIMIT 5
+
+
+
+// ----- Functions -----
+
+// Check for packets available from host
+uint32_t usb_rawio_available()
+{
+	// Error if USB isn't configured
+	if ( !usb_configuration )
+		return 0;
+
+	// Query number of bytes available from the endpoint
+	return usb_rx_byte_count( RAWIO_RX_ENDPOINT );
+}
+
+// Retrieve packets from host
+// Always returns RAWIO_RX_SIZE
+int32_t usb_rawio_rx( void *buf, uint32_t timeout )
+{
+	usb_packet_t *rx_packet;
+	uint32_t begin = millis();
+
+	// Read
+	while ( 1 )
+	{
+		// Error if USB isn't configured
+		if ( !usb_configuration )
+			return -1;
+
+		// Retrieve packet
+		rx_packet = usb_rx( RAWIO_RX_ENDPOINT );
+		if ( rx_packet )
+			break;
+
+		// Check for timeout
+		if ( millis() - begin > timeout || !timeout )
+		{
+			warn_msg("RAWIO Rx - Timeout, dropping packet.");
+			return 0;
+		}
+
+		yield();
+	}
+
+	// Transfer packet from USB buffer to given buffer
+	memcpy( buf, rx_packet->buf, RAWIO_RX_SIZE );
+	usb_free( rx_packet );
+
+	// Data sent in full packet chunks
+	return RAWIO_RX_SIZE;
+}
+
+// Send packet to host
+// XXX Only transfers RAWIO_TX_SIZE on each call (likely 64 bytes)
+// Always returns RAWIO_TX_SIZE
+int32_t usb_rawio_tx( const void *buf, uint32_t timeout )
+{
+	usb_packet_t *tx_packet;
+	uint32_t begin = millis();
+
+	while ( 1 )
+	{
+		// Error if USB isn't configured
+		if ( !usb_configuration )
+			return -1;
+
+		// Make sure we haven't exceeded the outgoing packet limit
+		if ( usb_tx_packet_count( RAWIO_TX_ENDPOINT ) < TX_PACKET_LIMIT )
+		{
+			// Allocate a packet buffer
+			tx_packet = usb_malloc();
+			if ( tx_packet )
+				break;
+		}
+
+		// Check for timeout
+		if ( millis() - begin > timeout )
+		{
+			warn_msg("RAWIO Tx - Timeout, dropping packet.");
+			return 0;
+		}
+
+		yield();
+	}
+
+	// Copy input buffer to usb packet buffer and assign length
+	memcpy( tx_packet->buf, buf, RAWIO_TX_SIZE );
+	tx_packet->len = RAWIO_TX_SIZE;
+
+	// Send USB packet
+	usb_tx( RAWIO_TX_ENDPOINT, tx_packet );
+
+	return RAWIO_TX_SIZE;
+}
+
+#endif
+