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PCI CD and PCI CDa

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

Template: edt.dot

Page 37

edt_get_burst_enable

Description

Returns the value of the burst enable flag, determining whether the DMA master transfers as many

words as possible at once, or transfers them one at a time as soon as the data is acquired. Burst transfers

are enabled by default to optimize use of the bus. For more information, see edt_set_burst_enable on

page 37.

Syntax

#include "edtinc.h"

int edt_get_burst_enable(EdtDev *edt_p);

Arguments

edt_p

device handle returned from edt_open or edt_open_channel

Return

A value of 1 if burst transfers are enabled; 0 otherwise.

edt_set_burst_enable

Description

Sets the burst enable flag, determining whether the DMA master transfers as many words as possible at

once, or transfers them one at a time as soon as the data is acquired. Burst transfers are enabled by

default to optimize use of the bus; however, you may wish to disable them if data latency is an issue, or

for diagnosing DMA problems.

Syntax

#include "edtinc.h"

void edt_set_burst_enable(EdtDev *edt_p, int onoff);

Arguments

edt_p

device handle returned from edt_open or edt_open_channel

onoff

A value of 1 turns the flag on (the default); 0 turns it off.

Return

No return value.

edt_get_firstflush

Description

Returns the value set by edt_set_firstflush(). This is an obsolete function that was only used as a kludge

to detect EDT_ACT_KBS (also obsolete).

Syntax

int edt_get_firstflush(EdtDev *edt_p)

Arguments

edt_p

device struct returned from edt_open.

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