#include <uhd/rfnoc/fosphor_block_control.hpp>

Inheritance diagram for uhd::rfnoc::fosphor_block_control:

Public Member Functions
virtual void	set_enable_histogram (const bool enable_histogram)=0

virtual bool	get_enable_histogram () const =0

virtual void	set_enable_waterfall (const bool enable_waterfall)=0

virtual bool	get_enable_waterfall () const =0

virtual void	clear_history ()=0

virtual void	set_enable_dither (const bool enable_dither)=0

virtual bool	get_enable_dither () const =0

virtual void	set_enable_noise (const bool enable_noise)=0

virtual bool	get_enable_noise () const =0

virtual void	set_histogram_decimation (const uint16_t decimation)=0

virtual uint16_t	get_histogram_decimation () const =0

virtual void	set_histogram_offset (const uint16_t offset)=0

virtual uint16_t	get_histogram_offset () const =0

virtual void	set_histogram_scale (const uint16_t scale)=0

virtual uint16_t	get_histogram_scale () const =0

virtual void	set_histogram_rise_rate (const uint16_t rise_rate)=0

virtual uint16_t	get_histogram_rise_rate () const =0

virtual void	set_histogram_decay_rate (const uint16_t decay_rate)=0

virtual uint16_t	get_histogram_decay_rate () const =0

virtual void	set_spectrum_alpha (const uint16_t alpha)=0

virtual uint16_t	get_spectrum_alpha () const =0

virtual void	set_spectrum_max_hold_decay (const uint16_t epsilon)=0

virtual uint16_t	get_spectrum_max_hold_decay () const =0

virtual void	set_waterfall_predivision (const fosphor_waterfall_predivision_ratio waterfall_predivision)=0

virtual fosphor_waterfall_predivision_ratio	get_waterfall_predivision () const =0

virtual void	set_waterfall_mode (const fosphor_waterfall_mode waterfall_mode)=0

virtual fosphor_waterfall_mode	get_waterfall_mode () const =0

virtual void	set_waterfall_decimation (const uint16_t waterfall_decimation)=0

virtual uint16_t	get_waterfall_decimation () const =0

Public Member Functions inherited from uhd::rfnoc::noc_block_base
	~noc_block_base () override

std::string	get_unique_id () const override
	Unique ID for an RFNoC block is its block ID. More...

size_t	get_num_input_ports () const override
	Number of input ports. Note: This gets passed into this block from the. More...

size_t	get_num_output_ports () const override
	Number of output ports. Note: This gets passed outto this block from the. More...

noc_id_t	get_noc_id () const

const block_id_t &	get_block_id () const

double	get_tick_rate () const

size_t	get_mtu (const res_source_info &edge)

uhd::device_addr_t	get_block_args () const

uhd::property_tree::sptr &	get_tree () const
	Return a reference to this block's subtree. More...

uhd::property_tree::sptr &	get_tree ()
	Return a reference to this block's subtree (non-const version) More...

Public Member Functions inherited from uhd::rfnoc::node_t
	node_t ()

virtual	~node_t ()

virtual std::string	get_unique_id () const
	Return a unique identifier string for this node. In every RFNoC graph,. More...

virtual size_t	get_num_input_ports () const =0

virtual size_t	get_num_output_ports () const =0

std::vector< std::string >	get_property_ids () const

template<typename prop_data_t >
void	set_property (const std::string &id, const prop_data_t &val, const size_t instance=0)

void	set_properties (const uhd::device_addr_t &props, const size_t instance=0)

template<typename prop_data_t >
const prop_data_t &	get_property (const std::string &id, const size_t instance=0)

virtual void	set_command_time (uhd::time_spec_t time, const size_t instance)

virtual uhd::time_spec_t	get_command_time (const size_t instance) const

virtual void	clear_command_time (const size_t instance)

Public Member Functions inherited from uhd::rfnoc::register_iface_holder
	register_iface_holder (register_iface::sptr reg)

virtual	~register_iface_holder ()=default

register_iface &	regs ()

Static Public Attributes
static const uint32_t	REG_ENABLE_ADDR

static const uint32_t	REG_CLEAR_ADDR

static const uint32_t	REG_RANDOM_ADDR

static const uint32_t	REG_DECIM_ADDR

static const uint32_t	REG_OFFSET_ADDR

static const uint32_t	REG_SCALE_ADDR

static const uint32_t	REG_TRISE_ADDR

static const uint32_t	REG_TDECAY_ADDR

static const uint32_t	REG_ALPHA_ADDR

static const uint32_t	REG_EPSILON_ADDR

static const uint32_t	REG_WF_CTRL_ADDR

static const uint32_t	REG_WF_DECIM_ADDR

Static Public Attributes inherited from uhd::rfnoc::node_t
static const size_t	ANY_PORT = size_t(~0)

Additional Inherited Members
Public Types inherited from uhd::rfnoc::noc_block_base
using	sptr = std::shared_ptr< noc_block_base >

using	make_args_ptr = std::unique_ptr< make_args_t >
	Opaque pointer to the constructor arguments. More...

Public Types inherited from uhd::rfnoc::node_t
enum class	forwarding_policy_t { ONE_TO_ONE , ONE_TO_FAN , ONE_TO_ALL_IN , ONE_TO_ALL_OUT , ONE_TO_ALL , DROP , USE_MAP }
	Types of property/action forwarding for those not defined by the block itself. More...

using	resolver_fn_t = std::function< void(void)>

using	resolve_callback_t = std::function< void(void)>

using	action_handler_t = std::function< void(const res_source_info &, action_info::sptr)>

using	forwarding_map_t = std::unordered_map< res_source_info, std::vector< res_source_info > >

Protected Types inherited from uhd::rfnoc::node_t
using	prop_ptrs_t = std::unordered_set< property_base_t * >

Protected Member Functions inherited from uhd::rfnoc::noc_block_base
	noc_block_base (make_args_ptr make_args)

void	set_num_input_ports (const size_t num_ports)
	Update number of input ports. More...

void	set_num_output_ports (const size_t num_ports)
	Update number of output ports. More...

void	set_tick_rate (const double tick_rate)

void	set_mtu_forwarding_policy (const forwarding_policy_t policy)

void	set_mtu (const res_source_info &edge, const size_t new_mtu)

property_base_t *	get_mtu_prop_ref (const res_source_info &edge)

std::shared_ptr< mb_controller >	get_mb_controller ()

virtual void	deinit ()

Protected Member Functions inherited from uhd::rfnoc::node_t
void	register_property (property_base_t *prop, resolve_callback_t &&clean_callback=nullptr)

void	add_property_resolver (prop_ptrs_t &&inputs, prop_ptrs_t &&outputs, resolver_fn_t &&resolver_fn)

void	set_prop_forwarding_policy (forwarding_policy_t policy, const std::string &prop_id="")

void	set_prop_forwarding_map (const forwarding_map_t &map)

template<typename prop_data_t >
void	set_property (const std::string &id, const prop_data_t &val, const res_source_info &src_info)

template<typename prop_data_t >
const prop_data_t &	get_property (const std::string &id, const res_source_info &src_info)

void	register_action_handler (const std::string &id, action_handler_t &&handler)

void	set_action_forwarding_policy (forwarding_policy_t policy, const std::string &action_key="")

void	set_action_forwarding_map (const forwarding_map_t &map)

void	post_action (const res_source_info &edge_info, action_info::sptr action)

virtual bool	check_topology (const std::vector< size_t > &connected_inputs, const std::vector< size_t > &connected_outputs)

virtual void	shutdown ()

Protected Member Functions inherited from uhd::rfnoc::register_iface_holder
void	update_reg_iface (register_iface::sptr new_iface=nullptr)

Static Protected Attributes inherited from uhd::rfnoc::node_t
static dirtifier_t	ALWAYS_DIRTY
	A dirtifyer object, useful for properties that always need updating. More...

Detailed Description

Fosphor Control Class

The Fosphor Block is an RFNoC block that accepts FFT data as signed complex 16-bit data and produces two streams of eight-bit data, a stream of histogram data and a stream of waterfall data.

Histogram

Each time the Fosphor block receives an FFT input packet, the power values in each of the N frequency bins are quantized into one of 64 power bins (X axis represents individual FFT frequency bins; Y axis represents the power bins):

63                                .
 :                              .   .
 :                  . .       .       .     . .
 0  . . . . . . . .     . . .           . .     . . . . . . .
    0 1 2 3 4 5 - - - - - - - - - - - - - - - - - - - - - - N-1

Each time an FFT power value is quantized to a bin, the bin count is increased by one (illustrated by a '+'):

63                                +
 :                              +   +
 :                  + +       +       +     + +
 0  + + + + + + + +     + + +           + +     + + + + + + +
    0 1 2 3 4 5 - - - - - - - - - - - - - - - - - - - - - - N-1

As more FFT packets are received, the counts in each bin accumulate. Over time, the count in the 'closest' power bin to each sample in the FFT accumulates at the highest rate. However, adjacent power bins' counts may increase due to quantization noise and variances in the input FFT signal (highest counts illustrated by '*', followed by '+' and '.'):

63                              . * +
 :          .       . .       + * . * +
 :  + + . . + + . + * * + + + * +     * + + * * . + . + + .
 0  * * * * * * * * + + * * * +       + * * + + * * * * * *
    0 1 2 3 4 5 - - - - - - - - - - - - - - - - - - - - - - N-1

The Fosphor block also calculates the average power level and maximum power level encountered in each FFT frequency bin. The rate at which the accumulated counts, average power level, and maximum power level values rise and fall over time is configurable.

An instance of histogram data output consists of 66 packets:

64 packets, one per quantized power level, of N values, representing the accumulated count for each frequency bin for that particular quantized power level;
One packet of N values, representing the average power level in each frequency bin; and
One packet of N values, representing the maximum power level in each frequency bin.

Waterfall

The waterfall stream consists of history data of either the average or maximum power level values in each bin, depending on the selected waterfall mode. In max hold mode, each waterfall packet consists of N values, representing the maximum power level in each frequency bin. The rate that packets are produced relative to the number of input FFT packets is configurable via the waterfall decimation parameter.

In average mode, each waterfall packet consists of N values, representing the sum of the average power level in each frequency bin accumulated between packets. (Thus, if the decimation rate is increased, the values returned are higher than if the decimation rate is decreased.) The waterfall predivision ratio parameter can be used to scale the values prior to accumulation to counteract this effect.

These streams are intended to be inputs to the GNU Radio Fosphor display block, which renders the streams in a entertaining graphical format.

Member Function Documentation

◆ clear_history()

virtual void uhd::rfnoc::fosphor_block_control::clear_history ( )

pure virtual

Clear the Fosphor block's stored history

Clears the accumulated history in the Fosphor block, resetting average and max hold values.

◆ get_enable_dither()

virtual bool uhd::rfnoc::fosphor_block_control::get_enable_dither ( ) const

pure virtual

Get the dither enable flag

Returns the current dither enable value.

Returns: Dither enable/disable flag

◆ get_enable_histogram()

virtual bool uhd::rfnoc::fosphor_block_control::get_enable_histogram ( ) const

pure virtual

Get the histogram stream enable flag

Returns the current histogram enable value.

Returns: Histogram stream enable/disable flag

◆ get_enable_noise()

virtual bool uhd::rfnoc::fosphor_block_control::get_enable_noise ( ) const

pure virtual

Get the noise enable flag

Returns the current noise enable value.

Returns: Noise enable/disable flag

◆ get_enable_waterfall()

virtual bool uhd::rfnoc::fosphor_block_control::get_enable_waterfall ( ) const

pure virtual

Get the waterfall stream enable flag

Returns the current waterfall enable value.

Returns: Histogram stream enable/disable flag

◆ get_histogram_decay_rate()

virtual uint16_t uhd::rfnoc::fosphor_block_control::get_histogram_decay_rate ( ) const

pure virtual

Get the histogram decay rate factor

Returns the current histogram decay rate factor.

Returns: The histogram decay rate factor

◆ get_histogram_decimation()

virtual uint16_t uhd::rfnoc::fosphor_block_control::get_histogram_decimation ( ) const

pure virtual

Get the histogram decimation factor

Returns the current histogram decimation factor.

Returns: Histogram decimation factor

◆ get_histogram_offset()

virtual uint16_t uhd::rfnoc::fosphor_block_control::get_histogram_offset ( ) const

pure virtual

Get the histogram offset factor

Returns the current histogram offset factor.

Returns: The histogram offset factor

◆ get_histogram_rise_rate()

virtual uint16_t uhd::rfnoc::fosphor_block_control::get_histogram_rise_rate ( ) const

pure virtual

Get the histogram rise rate factor

Returns the current histogram rise rate factor.

Returns: The histogram rise rate factor

◆ get_histogram_scale()

virtual uint16_t uhd::rfnoc::fosphor_block_control::get_histogram_scale ( ) const

pure virtual

Get the history scale factor

Returns the current histogram scale factor.

Returns: The histogram scale factor

◆ get_spectrum_alpha()

virtual uint16_t uhd::rfnoc::fosphor_block_control::get_spectrum_alpha ( ) const

pure virtual

Get the power level moving average weighting

Returns the weighting that is applied to older samples when calculating the average power level for each FFT frequency bin.

Returns: The power level moving average weighting

◆ get_spectrum_max_hold_decay()

virtual uint16_t uhd::rfnoc::fosphor_block_control::get_spectrum_max_hold_decay ( ) const

pure virtual

Get the maximum hold decay rate

Returns the rate at which the maximum value for each FFT frequency bin decays.

Returns: The maximum hold decay rate

◆ get_waterfall_decimation()

virtual uint16_t uhd::rfnoc::fosphor_block_control::get_waterfall_decimation ( ) const

pure virtual

Get the histogram decimation factor

Returns the current waterfall decimation factor.

Returns: The waterfall decimation factor

◆ get_waterfall_mode()

virtual fosphor_waterfall_mode uhd::rfnoc::fosphor_block_control::get_waterfall_mode ( ) const

pure virtual

Get the waterfall mode setting

Returns the current waterfall mode setting.

Returns: The waterfall mode setting

◆ get_waterfall_predivision()

virtual fosphor_waterfall_predivision_ratio uhd::rfnoc::fosphor_block_control::get_waterfall_predivision ( ) const

pure virtual

Get the waterfall predivision ratio

Returns the current waterfall predivision ratio.

Returns: The waterfall predivision ratio

◆ set_enable_dither()

virtual void uhd::rfnoc::fosphor_block_control::set_enable_dither ( const bool enable_dither )

pure virtual

Set the dither enable flag

Enables or disables dithering. Dithering adds quantization error to the incoming signal.

Parameters

enable_dither Dither enable/disable flag

◆ set_enable_histogram()

virtual void uhd::rfnoc::fosphor_block_control::set_enable_histogram ( const bool enable_histogram )

pure virtual

Set the histogram stream enable flag

Enables or disables the stream of histogram data from the block.

Parameters

enable_histogram Histogram stream enable/disable flag

◆ set_enable_noise()

virtual void uhd::rfnoc::fosphor_block_control::set_enable_noise ( const bool enable_noise )

pure virtual

Set the noise enable flag

Enables or disables the addition of random noise to the incoming signal.

Parameters

enable_noise Noise enable/disable flag

◆ set_enable_waterfall()

virtual void uhd::rfnoc::fosphor_block_control::set_enable_waterfall ( const bool enable_waterfall )

pure virtual

Set the waterfall stream enable flag

Enables or disables the stream of waterfall data from the block.

Parameters

enable_waterfall Histogram stream enable/disable flag

◆ set_histogram_decay_rate()

virtual void uhd::rfnoc::fosphor_block_control::set_histogram_decay_rate ( const uint16_t decay_rate )

pure virtual

Set the histogram decay rate factor

Sets the rate at which the hit count in each frequency and power bin decreases when not accumulating (i.e., there are no hits in the particular bin). The lower the value, the more slowly the values decrease, leading to a phosphorescent-like effect on the Fosphor display similar to the gradual fading of a CRT display when the electron beam is extinguished.

Parameters

decay_rate The histogram decay rate factor to apply

◆ set_histogram_decimation()

virtual void uhd::rfnoc::fosphor_block_control::set_histogram_decimation ( const uint16_t decimation )

pure virtual

Set the histogram decimation factor

Sets the ratio of histogram outputs to FFT packet inputs. For every decimation FFT input packets, one histogram output cluster (64 histogram packets, plus a maximum and average values packet) is produced. The minimum value for decimation is 2.

Parameters

decimation Histogram decimation factor

◆ set_histogram_offset()

virtual void uhd::rfnoc::fosphor_block_control::set_histogram_offset ( const uint16_t offset )

pure virtual

Set the histogram offset factor

Sets the offset factor to apply to FFT power levels before determining the appropriate histogram bin.

Parameters

offset The histogram offset factor to apply

◆ set_histogram_rise_rate()

virtual void uhd::rfnoc::fosphor_block_control::set_histogram_rise_rate ( const uint16_t rise_rate )

pure virtual

Set the histogram rise rate factor

Sets the rate at which the hit count in each frequency and power bin increases when accumulating (i.e., there are hits in the particular bin). The higher the value, the more quickly the values increase, leading to a phosphorescent-like effect on the Fosphor display similar to the gradual illumination of a CRT display in the area where the electron beam is pointing.

Parameters

rise_rate The histogram rise rate factor to apply

◆ set_histogram_scale()

virtual void uhd::rfnoc::fosphor_block_control::set_histogram_scale ( const uint16_t scale )

pure virtual

Set the histogram scale factor

Sets the scale factor to apply to FFT power levels before determining the appropriate histogram bin. The scaling factor is scale / 256.

Parameters

scale The histogram scale factor to apply

◆ set_spectrum_alpha()

virtual void uhd::rfnoc::fosphor_block_control::set_spectrum_alpha ( const uint16_t alpha )

pure virtual

Set the power level moving average weighting

Sets the weighing to be applied to the average power level value for each FFT frequency bin. The higher the value, the higher the weight is given to older samples (and thus the more slowly the average values change over time in each bin).

Parameters

alpha The power level moving average weighting to apply

◆ set_spectrum_max_hold_decay()

virtual void uhd::rfnoc::fosphor_block_control::set_spectrum_max_hold_decay ( const uint16_t epsilon )

pure virtual

Set the maximum hold decay rate

Sets the rate at which the maximum value for each FFT frequency bin decays. The higher the value, the faster the decay rate. A value of 0 retains the maximum values indefinitely.

Parameters

epsilon The histogram scale factor to apply

◆ set_waterfall_decimation()

virtual void uhd::rfnoc::fosphor_block_control::set_waterfall_decimation ( const uint16_t waterfall_decimation )

pure virtual

Set the waterfall decimation factor

Sets the ratio of waterfall outputs to FFT packet inputs. For every waterfall_decimation FFT input packets, one waterfall output packet is produced. The minimum value for waterfall_decimation is 2.

Parameters

waterfall_decimation The waterfall decimation factor to apply

◆ set_waterfall_mode()

virtual void uhd::rfnoc::fosphor_block_control::set_waterfall_mode ( const fosphor_waterfall_mode waterfall_mode )

pure virtual

Set the waterfall mode setting

Sets the source of the waterfall history data. When waterfall_mode is set to MAX_HOLD, the waterfall data is comprised of the max power values from each FFT frequency bin. When waterfall_mode is set to AVERAGE, the waterfall data is comprised of the accumulated average value from each FFT frequency bin between waterfall output packets.

Parameters

waterfall_mode The waterfall mode setting

◆ set_waterfall_predivision()

virtual void uhd::rfnoc::fosphor_block_control::set_waterfall_predivision ( const fosphor_waterfall_predivision_ratio waterfall_predivision )

pure virtual

Set the waterfall predivision ratio

Sets the scaling factor applied to waterfall values.

Parameters

waterfall_predivision The waterfall predivision ratio to apply

Member Data Documentation

◆ REG_ALPHA_ADDR

const uint32_t uhd::rfnoc::fosphor_block_control::REG_ALPHA_ADDR

static

◆ REG_CLEAR_ADDR

const uint32_t uhd::rfnoc::fosphor_block_control::REG_CLEAR_ADDR

static

◆ REG_DECIM_ADDR

const uint32_t uhd::rfnoc::fosphor_block_control::REG_DECIM_ADDR

static

◆ REG_ENABLE_ADDR

const uint32_t uhd::rfnoc::fosphor_block_control::REG_ENABLE_ADDR

static

◆ REG_EPSILON_ADDR

const uint32_t uhd::rfnoc::fosphor_block_control::REG_EPSILON_ADDR

static

◆ REG_OFFSET_ADDR

const uint32_t uhd::rfnoc::fosphor_block_control::REG_OFFSET_ADDR

static

◆ REG_RANDOM_ADDR

const uint32_t uhd::rfnoc::fosphor_block_control::REG_RANDOM_ADDR

static

◆ REG_SCALE_ADDR

const uint32_t uhd::rfnoc::fosphor_block_control::REG_SCALE_ADDR

static

◆ REG_TDECAY_ADDR

const uint32_t uhd::rfnoc::fosphor_block_control::REG_TDECAY_ADDR

static

◆ REG_TRISE_ADDR

const uint32_t uhd::rfnoc::fosphor_block_control::REG_TRISE_ADDR

static

◆ REG_WF_CTRL_ADDR

const uint32_t uhd::rfnoc::fosphor_block_control::REG_WF_CTRL_ADDR

static

◆ REG_WF_DECIM_ADDR

const uint32_t uhd::rfnoc::fosphor_block_control::REG_WF_DECIM_ADDR

static

The documentation for this class was generated from the following file:

include/uhd/rfnoc/fosphor_block_control.hpp

Public Member Functions

Static Public Attributes

Additional Inherited Members

Detailed Description

Histogram

Waterfall

Member Function Documentation

◆ clear_history()

◆ get_enable_dither()

◆ get_enable_histogram()

◆ get_enable_noise()

◆ get_enable_waterfall()

◆ get_histogram_decay_rate()

◆ get_histogram_decimation()

◆ get_histogram_offset()

◆ get_histogram_rise_rate()

◆ get_histogram_scale()

◆ get_spectrum_alpha()

◆ get_spectrum_max_hold_decay()

◆ get_waterfall_decimation()

◆ get_waterfall_mode()

◆ get_waterfall_predivision()

◆ set_enable_dither()

◆ set_enable_histogram()

◆ set_enable_noise()

◆ set_enable_waterfall()

◆ set_histogram_decay_rate()

◆ set_histogram_decimation()

◆ set_histogram_offset()

◆ set_histogram_rise_rate()

◆ set_histogram_scale()

◆ set_spectrum_alpha()

◆ set_spectrum_max_hold_decay()

◆ set_waterfall_decimation()

◆ set_waterfall_mode()

◆ set_waterfall_predivision()

Member Data Documentation

◆ REG_ALPHA_ADDR

◆ REG_CLEAR_ADDR

◆ REG_DECIM_ADDR

◆ REG_ENABLE_ADDR

◆ REG_EPSILON_ADDR

◆ REG_OFFSET_ADDR

◆ REG_RANDOM_ADDR

◆ REG_SCALE_ADDR

◆ REG_TDECAY_ADDR

◆ REG_TRISE_ADDR

◆ REG_WF_CTRL_ADDR

◆ REG_WF_DECIM_ADDR