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Video Scaler v4.0 User Guide
www.xilinx.com
35
UG805 March 1, 2011
Constant (Fixed) Mode
Constant (Fixed) Mode
When using this mode, the values are fixed at compile time. The user system does not need
to drive any of the parameters. The CORE Generator GUI prompts you to specify:
•
coefficient file (.coe)
•
hsf
•
vsf
•
aperture_start_pixel
•
aperture_end_pixel
•
aperture_start_line
•
aperture_end_line
•
output_h_size
•
output_v_size
•
num_h_phases
•
num_v_phases
Constant mode has the following restrictions:
•
A single coefficient set must be specified using a .coe file; this is the only way to
populate the coefficient memory.
•
Coefficients may not be written to the core; the coef_wr_addr control is disabled.
•
You may not specify
h_coeff_set
or
v_coeff_set
; there is only one set of
coefficients.
•
You may not specify
start_hpa_y
,
start_hpa_c
,
start_vpa_y
,
start_vpa_c
;
they are set internally to zero.
•
The control register is always set to “0x00000003,” fixing the scaler in active mode.
General Purpose Processor (GPP) Interface
This interface type exposes all control ports to the user. You are responsible for driving
these ports. Xilinx recommends that GPP mode be used only by experienced scaler users.
Figure 6-1
indicates how the EDK pCore is effectively a wrapper around the GPP mode
core. This should be considered as an example of how you may choose to wrap the GPP
mode core to suit any processor.
In GPP mode, the control values may be changed during runtime – the user input control
values become active once per frame after completion of an output frame, using an internal
active value capture register.
Coefficient Delivery for GPP Interface
In this mode, you must supply all coefficients to the core. See
Chapter 8, “Coefficients,”
for
all details regarding coefficient loading in GPP mode.
Содержание LogiCORE IP
Страница 1: ...LogiCORE IP Video Scaler v4 0 User Guide UG805 March 1 2011...
Страница 6: ...Video Scaler v4 0 User Guide www xilinx com UG805 March 1 2011...
Страница 14: ...14 www xilinx com Video Scaler v4 0 User Guide UG805 March 1 2011 Preface About This Guide...
Страница 18: ...18 www xilinx com Video Scaler v4 0 User Guide UG805 March 1 2011 Chapter 1 Introduction...
Страница 20: ...20 www xilinx com Video Scaler v4 0 User Guide UG805 March 1 2011 Chapter 2 Overview...
Страница 70: ...70 www xilinx com Video Scaler v4 0 User Guide UG805 March 1 2011 Chapter 9 Performance...
Страница 74: ...74 www xilinx com Video Scaler v4 0 User Guide UG805 March 1 2011 Appendix A Use Cases...
Страница 92: ...92 www xilinx com Video Scaler v4 0 User Guide UG805 March 1 2011 Appendix B Programmer Guide...