CDA CD 60 Spezifikationen PDF herunterladen (Seite 35)

PCI CD and PCI CDa

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

Template: edt.dot

Page 35

edt_set_wtimeout

Description

Sets the number of milliseconds for data write calls, such as edt_write(), to wait for DMA to complete

before returning. A value of 0 causes the I/O operation to wait forever—that is, to block on a write.

Edt_set_wtimeout affects edt_wait_for_buffers (see page XX) and edt_write (see page XX).

Syntax

#include "edtinc.h"

int edt_set_wtimeout(EdtDev *edt_p, int value);

Arguments

edt_p

device handle returned from edt_open or edt_open_channel

value

The number of milliseconds in the timeout period.

Return

0 on success; –1 on error. If an error occurs, call edt_perror() to get the system error message.

edt_get_timestamp

Description

Gets the seconds and microseconds timestamp of when dma was completed on the buffer specified by

bufnum. “bufnum” is moded by the number of buffers in the ring buffer, so it can either be an index, or

the number of buffers completed.

Syntax

int edt_get_timestamp(EdtDev *edt_p, u_int *timep, u_int bufnum)

Arguments

edt_p

device struct returned from edt_open

timep

pointer to an unsigned integer array

bufnum

buffer index, or number of buffers completed

Example

int timestamp[2];

u_int bufnum=edt_done_count(edt_p);

edt_get_timestamp(edt_p, timestamp, bufnum);

Return

0 on success, -1 on failure. Fills in timestamp pointed to by timep.

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CDA CD 60 Spezifikationen Seite 35