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diff --git a/Radio/HW/BladeRF/src/driver/si5338.h b/Radio/HW/BladeRF/src/driver/si5338.h
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+++ b/Radio/HW/BladeRF/src/driver/si5338.h
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+/**
+ * @file si5338.h
+ *
+ * @brief SI5339 Support
+ *
+ * This file is part of the bladeRF project:
+ *   http://www.github.com/nuand/bladeRF
+ *
+ * Copyright (C) 2013 Nuand LLC
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef DRIVER_SI5338_H_
+#define DRIVER_SI5338_H_
+
+#include <libbladeRF.h>
+
+#include "board/board.h"
+
+/**
+ * Set the rational sample rate of the specified channel.
+ *
+ * @param       dev     Device handle
+ * @param[in]   ch      Channel
+ * @param[in]   rate    Rational rate requested
+ * @param[out]  actual  Rational rate actually set
+ *
+ * @return 0 on success, BLADERF_ERR_* value on failure
+ */
+int si5338_set_rational_sample_rate(struct bladerf *dev,
+                                    bladerf_channel ch,
+                                    const struct bladerf_rational_rate *rate,
+                                    struct bladerf_rational_rate *actual);
+
+/**
+ * Get the rational sample rate of the specified channel.
+ *
+ * @param       dev     Device handle
+ * @param[in]   ch      Channel
+ * @param[out]  rate    Rational rate
+ *
+ * @return 0 on success, BLADERF_ERR_* value on failure
+ */
+int si5338_get_rational_sample_rate(struct bladerf *dev,
+                                    bladerf_channel ch,
+                                    struct bladerf_rational_rate *rate);
+
+/**
+ * Set the integral sample rate of the specified channel.
+ *
+ * @param       dev     Device handle
+ * @param[in]   ch      Channel
+ * @param[in]   rate    Integral rate requested
+ * @param[out]  actual  Integral rate actually set
+ *
+ * @return 0 on success, BLADERF_ERR_* value on failure
+ */
+int si5338_set_sample_rate(struct bladerf *dev,
+                           bladerf_channel ch,
+                           uint32_t rate,
+                           uint32_t *actual);
+
+/**
+ * Get the integral sample rate of the specified channel.
+ *
+ * @param       dev     Device handle
+ * @param[in]   ch      Channel
+ * @param[out]  rate    Integral rate
+ *
+ * @return 0 on success, BLADERF_ERR_* value on failure
+ */
+int si5338_get_sample_rate(struct bladerf *dev,
+                           bladerf_channel ch,
+                           unsigned int *rate);
+
+/**
+ * Set the rational frequency of the external SMB port.
+ *
+ * @param       dev     Device handle
+ * @param[in]   rate    Rational rate requested
+ * @param[out]  actual  Rational rate actually set
+ *
+ * @return 0 on success, BLADERF_ERR_* value on failure
+ */
+int si5338_set_rational_smb_freq(struct bladerf *dev,
+                                 const struct bladerf_rational_rate *rate,
+                                 struct bladerf_rational_rate *actual);
+
+/**
+ * Get the rational sample rate of the external SMB port.
+ *
+ * @param       dev     Device handle
+ * @param[out]  rate    Rational rate
+ *
+ * @return 0 on success, BLADERF_ERR_* value on failure
+ */
+int si5338_get_rational_smb_freq(struct bladerf *dev,
+                                 struct bladerf_rational_rate *rate);
+
+/**
+ * Set the integral sample rate of the external SMB port.
+ *
+ * @param       dev     Device handle
+ * @param[in]   rate    Integral rate requested
+ * @param[out]  actual  Integral rate actually set
+ *
+ * @return 0 on success, BLADERF_ERR_* value on failure
+ */
+int si5338_set_smb_freq(struct bladerf *dev, uint32_t rate, uint32_t *actual);
+
+/**
+  Get the integral sample rate of the external SMB port.
+ *
+ * @param       dev     Device handle
+ * @param[out]  rate    Integral rate
+ *
+ * @return 0 on success, BLADERF_ERR_* value on failure
+ */
+int si5338_get_smb_freq(struct bladerf *dev, unsigned int *rate);
+
+#endif