CDA CD 60 Especificaciones descargar pdf (Pagina 57)

PCI CD and PCI CDa

Document Number: 008-00965-06 EDT Public Revision: I December 2004

Template: edt.dot

Page 57

Arguments

edt_p

device handle returned from edt_open

target

desired output frequency in Hz

xtal

base frequency of the PCI CD board:

PCI CD use XTAL20

PCI CD use XTAL60

Verbose

a value of 1 prints a description to stdout, useful for debugging ; a value of 0

turns off verbose output

Return

The actual frequency, in Hertz, computed for the edt_pll structure.

edt_set_pll_clock

Description

Sets the phase-locked loop circuit to the parameters described in Figure and computed using

edt_find_vco_frequency, above. This routine enables the phase-locked loop by setting

the appropriate bits in the FUNCT register, and then calls edt_set_out_clock to set the

circuit as required.

Syntax

#include "edtinc.h"

void edt_set_pll_clock(EdtDev *edt_p, double xtal, edt_pll

*pll, int verbose);

Arguments

edt_p device handle returned from edt_open

xtal base frequency of PCI CD/CDa board:

PCI CD-20 use XTAL20

PCI CD-60 use XTAL60

pll the structure containing the values necessary to set the phase-locked loop circuit,

as described in Figure 1.

verbose a value of 1 prints a description to stdout, useful for debugging; a value of 0 turns

off verbose output

Return

None.

edt_set_out_clock

Description

Sets the phase-locked loop circuit to the parameters described in Figure 1 and computed using

edt_find_vco_frequency.

Syntax

#include "edtinc.h"

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