The
xip_fir_v7_2_config
structure contains all parameters that affect the filter configuration. Most are duplicates of the core XCO parameters. The filter coefficients of the model are provided using the
coeff
field and are quantized (if specified) in the same manner as by the core GUI.
Table 5-6:
xip_fir_v7_2_config
|
Field Name
|
Type
|
Description
|
|
name
|
const char*
|
|
|
filter_type
|
unsigned int
|
Select from:
XIP_FIR_SINGLE_RATE
XIP_FIR_INTERPOLATION
XIP_FIR_DECIMATION
XIP_FIR_HILBERT
XIP_FIR_INTERPOLATED
|
|
rate_change
|
unsigned int
|
Select from:
XIP_FIR_INTEGER_RATE
XIP_FIR_FRACTIONAL_RATE
|
|
interp_rate
|
unsigned int
|
Specifies the interpolation (or up-sampling) factor
|
|
decim_rate
|
unsigned int
|
Specifies the decimation (or down-sampling) factor
|
|
zero_pack_factor
|
unsigned int
|
Specifies the zero packing factor for Interpolated filters
|
|
coeff
|
const double*
|
Pointer to coefficient array
|
|
coeff_padding
|
unsigned int
|
Specifies the amount of zero padding added to the front of the filter.
The core GUI reports this value for a given core configuration.
|
|
num_coeffs
|
unsigned int
|
Specifies the number of coefficients in one filter
|
|
coeff_sets
|
unsigned int
|
Specifies the number of coefficient sets in the coeff array
|
|
reloadable
|
unsigned int
|
Specifies if the coefficients are reloadable; 0 = No, 1 = Yes
|
|
is_halfband
|
unsigned int
|
Specifies if halfband coefficients have been specified; 0 = No, 1 = Yes
|
|
quantization
|
unsigned int
|
Select from:
XIP_FIR_INTEGER_COEFF
XIP_FIR_QUANTIZED_ONLY
XIP_FIR_MAXIMIZE_DYNAMIC_RANGE
|
|
coeff_width
|
unsigned int
|
The model uses these parameters, if requested, to quantize the supplied coefficients
|
|
coeff_fract_width
|
unsigned int
|
|
chan_seq
|
unsigned int
|
Select from:
XIP_FIR_BASIC_CHAN_SEQ
XIP_FIR_ADVANCED_CHAN_SEQ
|
|
num_channels
|
unsigned int
|
Specifies the number of data channels supported
|
|
init_pattern
|
xip_fir_v7_2_pattern
|
Specifies the initial channel pattern used by the model when Advanced Interleaved Channels have been selected
|
|
num_paths
|
unsigned int
|
Specifies the number of datapaths supported
|
|
data_width
|
unsigned int
|
The model uses these parameters to quantize the input samples of the model
|
|
data_fract_width
|
unsigned int
|
|
output_rounding_mode
|
unsigned int
|
Select from:
XIP_FIR_FULL_PRECISION
XIP_FIR_TRUNCATE_LSBS
XIP_FIR_SYMMETRIC_ZERO
XIP_FIR_SYMMETRIC_INF
XIP_FIR_CONVERGENT_EVEN
XIP_FIR_CONVERGENT_ODD
XIP_FIR_NON_SYMMETRIC_DOWN
XIP_FIR_NON_SYMMETRIC_UP
|
|
output_width
|
unsigned int
|
Ignored when XIP_FIR_FULL_PRECISION
|
|
output_fract_width
|
unsigned int
|
READ ONLY
Provides the number of fractional bits present in the output word
|
|
config_method
|
unsigned int
|
Select from:
XIP_FIR_CONFIG_SINGLE
XIP_FIR_CONFIG_BY_CHANNEL
|
The
xip_fir_v7_2_cnfg_packet
structure is supplied to the
xip_fir_v7_2_config_send
function (see
Send CONFIG Packet
) to update the channel pattern and coefficient set used by the model.
Table 5-7:
xip_fir_v7_2_cnfg_packet
|
Field Name
|
Type
|
Description
|
|
chanpat
|
xip_fir_v7_2_pattern
|
Specifies the Advanced Interleaved Channel pattern to be used
|
|
fsel
|
xip_array_uint*
|
Filter set to use, 1-D array; specifies one value for all channels (XIP_FIR_CONFIG_SINGLE) or individually for each interleaved channel (XIP_FIR_CONFIG_BY_CHANNEL)
|
The
xip_fir_v7_2_rld_packet
structure is supplied to the
xip_fir_v7_2_reload_send
function (see
Send RELOAD Packet
) to update a given coefficient set with new filter coefficients. As with the core, a configuration packet must be processed by the model to apply any pending reload packets.
Table 5-8:
xip_fir_v7_2_rld_packet
|
Field Name
|
Type
|
Description
|
|
fsel
|
Int
|
Filter set to reload
|
|
coeff
|
xip_array_real*
|
Pointer to an array containing the new coefficients to be loaded, 1-D array.
|