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libusrp/host/lib/legacy/usrp_standard.h

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/* -*- c++ -*- */
/*
* Copyright 2004,2008 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_USRP_STANDARD_H
#define INCLUDED_USRP_STANDARD_H
#include <usrp_basic.h>
#include <boost/shared_ptr.hpp>
#include <usrp_tune_result.h>
class usrp_standard_tx;
class usrp_standard_rx;
typedef boost::shared_ptr<usrp_standard_tx> usrp_standard_tx_sptr;
typedef boost::shared_ptr<usrp_standard_rx> usrp_standard_rx_sptr;
/*!
* \ingroup usrp
*/
class usrp_standard_common
{
int d_fpga_caps; // capability register val
protected:
usrp_standard_common(usrp_basic *parent);
public:
/*!
*\brief does the FPGA implement the final Rx half-band filter?
* If it doesn't, the maximum decimation factor with proper gain
* is 1/2 of what it would otherwise be.
*/
bool has_rx_halfband() const;
/*!
* \brief number of digital downconverters implemented in the FPGA
* This will be 0, 1, 2 or 4.
*/
int nddcs() const;
/*!
*\brief does the FPGA implement the initial Tx half-band filter?
*/
bool has_tx_halfband() const;
/*!
* \brief number of digital upconverters implemented in the FPGA
* This will be 0, 1, or 2.
*/
int nducs() const;
/*!
* \brief Calculate the frequency to use for setting the digital up or down converter.
*
* \param target_freq is the desired RF frequency (Hz).
* \param baseband_freq is the RF frequency that corresponds to DC in the IF coming from the d'board.
* \param fs is the sampling frequency.
* \param[out] dxc_freq the frequency to program into the DDC (or DUC).
* \param[out] inverted is true if we're operating in an inverted Nyquist zone.
*/
static void calc_dxc_freq(double target_freq, double baseband_freq, double fs,
double *dxc_freq, bool *inverted);
};
/*!
* \brief The C++ interface the receive side of the USRP
* \ingroup usrp
*
* This is the recommended interface to USRP receive functionality
* for applications that use the USRP but not GNU Radio.
*/
class usrp_standard_rx : public usrp_basic_rx, public usrp_standard_common
{
private:
static const int MAX_CHAN = 4;
unsigned int d_decim_rate;
int d_nchan;
int d_sw_mux;
int d_hw_mux;
double d_rx_freq[MAX_CHAN];
protected:
usrp_standard_rx (int which_board,
unsigned int decim_rate,
int nchan = 1,
int mux = -1,
int mode = 0,
int fusb_block_size = 0,
int fusb_nblocks = 0,
const std::string fpga_filename = "",
const std::string firmware_filename = ""
); // throws if trouble
bool write_hw_mux_reg ();
public:
enum {
FPGA_MODE_NORMAL = 0x00,
FPGA_MODE_LOOPBACK = 0x01,
FPGA_MODE_COUNTING = 0x02,
FPGA_MODE_COUNTING_32BIT = 0x04
};
~usrp_standard_rx ();
/*!
* \brief invokes constructor, returns shared_ptr or shared_ptr equivalent of 0 if trouble
*
* \param which_board Which USRP board on usb (not particularly useful; use 0)
* \param decim_rate decimation factor
* \param nchan number of channels
* \param mux Rx mux setting, \sa set_mux
* \param mode mode
* \param fusb_block_size fast usb xfer block size. Must be a multiple of 512.
* Use zero for a reasonable default.
* \param fusb_nblocks number of fast usb URBs to allocate. Use zero for a reasonable default.
* \param fpga_filename Name of rbf file to load
* \param firmware_filename Name of ihx file to load
*/
static usrp_standard_rx_sptr make(int which_board,
unsigned int decim_rate,
int nchan = 1,
int mux = -1,
int mode = 0,
int fusb_block_size = 0,
int fusb_nblocks = 0,
const std::string fpga_filename = "",
const std::string firmware_filename = ""
);
/*!
* \brief Set decimator rate. \p rate MUST BE EVEN and in [8, 256].
*
* The final complex sample rate across the USB is
* adc_freq () / decim_rate () * nchannels ()
*/
bool set_decim_rate (unsigned int rate);
/*!
* \brief Set number of active channels. \p nchannels must be 1, 2 or 4.
*
* The final complex sample rate across the USB is
* adc_freq () / decim_rate () * nchannels ()
*/
bool set_nchannels (int nchannels);
/*!
* \brief Set input mux configuration.
*
* This determines which ADC (or constant zero) is connected to
* each DDC input. There are 4 DDCs. Each has two inputs.
*
* <pre>
* Mux value:
*
* 3 2 1
* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Q3 | I3 | Q2 | I2 | Q1 | I1 | Q0 | I0 |
* +-------+-------+-------+-------+-------+-------+-------+-------+
*
* Each 4-bit I field is either 0,1,2,3
* Each 4-bit Q field is either 0,1,2,3 or 0xf (input is const zero)
* All Q's must be 0xf or none of them may be 0xf
* </pre>
*/
bool set_mux (int mux);
/*!
* Determine the appropriate Rx mux value as a function of the subdevice choosen
* and the characteristics of the respective daughterboard.
*/
int determine_rx_mux_value(const usrp_subdev_spec &ss);
int determine_rx_mux_value(const usrp_subdev_spec &ss_a, const usrp_subdev_spec &ss_b);
/*!
* \brief set the frequency of the digital down converter.
*
* \p channel must be in the range [0,3]. \p freq is the center
* frequency in Hz. \p freq may be either negative or postive.
* The frequency specified is quantized. Use rx_freq to retrieve
* the actual value used.
*/
bool set_rx_freq (int channel, double freq);
/*!
* \brief set fpga mode
*/
bool set_fpga_mode (int mode);
/*!
* \brief Set the digital down converter phase register.
*
* \param channel which ddc channel [0, 3]
* \param phase 32-bit integer phase value.
*/
bool set_ddc_phase(int channel, int phase);
/*!
* \brief Specify Rx data format.
*
* \param format format specifier
*
* Rx data format control register
*
* 3 2 1
* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
* +-----------------------------------------+-+-+---------+-------+
* | Reserved (Must be zero) |B|Q| WIDTH | SHIFT |
* +-----------------------------------------+-+-+---------+-------+
*
* SHIFT specifies arithmetic right shift [0, 15]
* WIDTH specifies bit-width of I & Q samples across the USB [1, 16] (not all valid)
* Q if set deliver both I & Q, else just I
* B if set bypass half-band filter.
*
* Right now the acceptable values are:
*
* B Q WIDTH SHIFT
* 0 1 16 0
* 0 1 8 8
*
* More valid combos to come.
*
* Default value is 0x00000300 16-bits, 0 shift, deliver both I & Q.
*/
bool set_format(unsigned int format);
static unsigned int make_format(int width=16, int shift=0,
bool want_q=true, bool bypass_halfband=false);
static int format_width(unsigned int format);
static int format_shift(unsigned int format);
static bool format_want_q(unsigned int format);
static bool format_bypass_halfband(unsigned int format);
/*!
* \brief High-level "tune" method. Works for the single channel case.
*
* This method adjusts both the daughterboard LO and the DDC so that
* target_freq ends up at DC in the complex baseband samples.
*
* \param chan which DDC channel we're controlling (almost always 0).
* \param db the daughterboard we're controlling.
* \param target_freq the RF frequency we want at DC in the complex baseband.
* \param[out] result details how the hardware was configured.
*
* \returns true iff everything was successful.
*/
bool tune(int chan, db_base_sptr db, double target_freq, usrp_tune_result *result);
// ACCESSORS
unsigned int decim_rate () const;
double rx_freq (int channel) const;
int nchannels () const;
int mux () const;
unsigned int format () const;
// called in base class to derived class order
bool start ();
bool stop ();
};
// ----------------------------------------------------------------
/*!
* \brief The C++ interface the transmit side of the USRP
* \ingroup usrp
*
* This is the recommended interface to USRP transmit functionality
* for applications that use the USRP but not GNU Radio.
*
* Uses digital upconverter (coarse & fine modulators) in AD9862...
*/
class usrp_standard_tx : public usrp_basic_tx, public usrp_standard_common
{
public:
enum coarse_mod_t {
CM_NEG_FDAC_OVER_4, // -32 MHz
CM_NEG_FDAC_OVER_8, // -16 MHz
CM_OFF,
CM_POS_FDAC_OVER_8, // +16 MHz
CM_POS_FDAC_OVER_4 // +32 MHz
};
protected:
static const int MAX_CHAN = 2;
unsigned int d_interp_rate;
int d_nchan;
int d_sw_mux;
int d_hw_mux;
double d_tx_freq[MAX_CHAN];
coarse_mod_t d_coarse_mod[MAX_CHAN];
unsigned char d_tx_modulator_shadow[MAX_CHAN];
virtual bool set_coarse_modulator (int channel, coarse_mod_t cm);
usrp_standard_tx::coarse_mod_t coarse_modulator (int channel) const;
protected:
usrp_standard_tx (int which_board,
unsigned int interp_rate,
int nchan = 1,
int mux = -1,
int fusb_block_size = 0,
int fusb_nblocks = 0,
const std::string fpga_filename = "",
const std::string firmware_filename = ""
); // throws if trouble
bool write_hw_mux_reg ();
public:
~usrp_standard_tx ();
/*!
* \brief invokes constructor, returns shared_ptr or shared_ptr equivalent of 0 if trouble
*
* \param which_board Which USRP board on usb (not particularly useful; use 0)
* \param interp_rate interpolation factor
* \param nchan number of channels
* \param mux Tx mux setting, \sa set_mux
* \param fusb_block_size fast usb xfer block size. Must be a multiple of 512.
* Use zero for a reasonable default.
* \param fusb_nblocks number of fast usb URBs to allocate. Use zero for a reasonable default.
* \param fpga_filename Name of rbf file to load
* \param firmware_filename Name of ihx file to load
*/
static usrp_standard_tx_sptr make(int which_board,
unsigned int interp_rate,
int nchan = 1,
int mux = -1,
int fusb_block_size = 0,
int fusb_nblocks = 0,
const std::string fpga_filename = "",
const std::string firmware_filename = ""
);
/*!
* \brief Set interpolator rate. \p rate must be in [4, 512] and a multiple of 4.
*
* The final complex sample rate across the USB is
* dac_freq () / interp_rate () * nchannels ()
*/
virtual bool set_interp_rate (unsigned int rate);
/*!
* \brief Set number of active channels. \p nchannels must be 1 or 2.
*
* The final complex sample rate across the USB is
* dac_freq () / decim_rate () * nchannels ()
*/
bool set_nchannels (int nchannels);
/*!
* \brief Set output mux configuration.
*
* <pre>
* 3 2 1
* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
* +-------------------------------+-------+-------+-------+-------+
* | | DAC3 | DAC2 | DAC1 | DAC0 |
* +-------------------------------+-------+-------+-------+-------+
*
* There are two interpolators with complex inputs and outputs.
* There are four DACs.
*
* Each 4-bit DACx field specifies the source for the DAC and
* whether or not that DAC is enabled. Each subfield is coded
* like this:
*
* 3 2 1 0
* +-+-----+
* |E| N |
* +-+-----+
*
* Where E is set if the DAC is enabled, and N specifies which
* interpolator output is connected to this DAC.
*
* N which interp output
* --- -------------------
* 0 chan 0 I
* 1 chan 0 Q
* 2 chan 1 I
* 3 chan 1 Q
* </pre>
*/
bool set_mux (int mux);
/*!
* Determine the appropriate Tx mux value as a function of the subdevice choosen
* and the characteristics of the respective daughterboard.
*/
int determine_tx_mux_value(const usrp_subdev_spec &ss);
int determine_tx_mux_value(const usrp_subdev_spec &ss_a, const usrp_subdev_spec &ss_b);
/*!
* \brief set the frequency of the digital up converter.
*
* \p channel must be in the range [0,1]. \p freq is the center
* frequency in Hz. It must be in the range [-44M, 44M].
* The frequency specified is quantized. Use tx_freq to retrieve
* the actual value used.
*/
virtual bool set_tx_freq (int channel, double freq); // chan: [0,1]
// ACCESSORS
unsigned int interp_rate () const;
double tx_freq (int channel) const;
int nchannels () const;
int mux () const;
/*!
* \brief High-level "tune" method. Works for the single channel case.
*
* This method adjusts both the daughterboard LO and the DUC so that
* DC in the complex baseband samples ends up at RF target_freq.
*
* \param chan which DUC channel we're controlling (usually == which_side).
* \param db the daughterboard we're controlling.
* \param target_freq the RF frequency we want our baseband translated to.
* \param[out] result details how the hardware was configured.
*
* \returns true iff everything was successful.
*/
bool tune(int chan, db_base_sptr db, double target_freq, usrp_tune_result *result);
// called in base class to derived class order
bool start ();
bool stop ();
};
#endif /* INCLUDED_USRP_STANDARD_H */
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