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diff --git a/firmware/fx2/include/usrp_commands.h b/firmware/fx2/include/usrp_commands.h
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+/*
+ * USRP - Universal Software Radio Peripheral
+ *
+ * Copyright (C) 2003,2004 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Boston, MA 02110-1301 USA
+ */
+
+#ifndef _USRP_COMMANDS_H_
+#define _USRP_COMMANDS_H_
+
+#include <usrp_interfaces.h>
+#include <usrp_spi_defs.h>
+
+#define MAX_EP0_PKTSIZE 64 // max size of EP0 packet on FX2
+
+// ----------------------------------------------------------------
+// Vendor bmRequestType's
+// ----------------------------------------------------------------
+
+#define VRT_VENDOR_IN 0xC0
+#define VRT_VENDOR_OUT 0x40
+
+// ----------------------------------------------------------------
+// USRP Vendor Requests
+//
+// Note that Cypress reserves [0xA0,0xAF].
+// 0xA0 is the firmware load function.
+// ----------------------------------------------------------------
+
+
+// IN commands
+
+#define VRQ_GET_STATUS 0x80
+#define GS_TX_UNDERRUN 0 // wIndexL // returns 1 byte
+#define GS_RX_OVERRUN 1 // wIndexL // returns 1 byte
+
+#define VRQ_I2C_READ 0x81 // wValueL: i2c address; length: how much to read
+
+#define VRQ_SPI_READ 0x82 // wValue: optional header bytes
+ // wIndexH: enables
+ // wIndexL: format
+ // len: how much to read
+
+// OUT commands
+
+#define VRQ_SET_LED 0x01 // wValueL off/on {0,1}; wIndexL: which {0,1}
+
+#define VRQ_FPGA_LOAD 0x02
+# define FL_BEGIN 0 // wIndexL: begin fpga programming cycle. stalls if trouble.
+# define FL_XFER 1 // wIndexL: xfer up to 64 bytes of data
+# define FL_END 2 // wIndexL: end programming cycle, check for success.
+ // stalls endpoint if trouble.
+
+#define VRQ_FPGA_WRITE_REG 0x03 // wIndexL: regno; data: 32-bit regval MSB first
+#define VRQ_FPGA_SET_RESET 0x04 // wValueL: {0,1}
+#define VRQ_FPGA_SET_TX_ENABLE 0x05 // wValueL: {0,1}
+#define VRQ_FPGA_SET_RX_ENABLE 0x06 // wValueL: {0,1}
+// see below VRQ_FPGA_SET_{TX,RX}_RESET
+
+#define VRQ_SET_SLEEP_BITS 0x07 // wValueH: mask; wValueL: bits. set bits given by mask to bits
+
+# define SLEEP_ADC0 0x01
+# define SLEEP_ADC1 0x02
+# define SLEEP_DAC0 0x04
+# define SLEEP_DAC1 0x08
+
+#define VRQ_I2C_WRITE 0x08 // wValueL: i2c address; data: data
+
+#define VRQ_SPI_WRITE 0x09 // wValue: optional header bytes
+ // wIndexH: enables
+ // wIndexL: format
+ // len: how much to write
+
+#define VRQ_FPGA_SET_TX_RESET 0x0a // wValueL: {0, 1}
+#define VRQ_FPGA_SET_RX_RESET 0x0b // wValueL: {0, 1}
+
+
+// -------------------------------------------------------------------
+// we store the hashes at fixed addresses in the FX2 internal memory
+
+#define USRP_HASH_SLOT_0_ADDR 0xe1e0
+#define USRP_HASH_SLOT_1_ADDR 0xe1f0
+
+
+
+#endif /* _USRP_COMMANDS_H_ */