CDA CD 60 Spezifikationen PDF herunterladen (Seite 24)

PCI CD and PCI CDa

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

Template: edt.dot

Page 24

Arguments

edt_p

device handle returned from edt_open or edt_open_channel

count

buffer number for which to block. Completed buffers are numbered

cumulatively starting with 0 when the EDT Product is opened.

timep

pointer to an array of two unsigned integers. The first integer is seconds, the

next integer is microseconds representing the system time at which the

buffer completed.

Return

Address of last completed buffer on success; NULL on error. If an error occurs, call edt_perror() to get

the system error message.

Note

If the ring buffer is in free-running mode and the application cannot process data as fast as it

is acquired, DMA will wrap around and overwrite the referenced buffer . The application

must ensure that the data in the buffer is processed or copied out in time to prevent overrun.

edt_next_writebuf

Description

Returns a pointer to the next buffer scheduled for output DMA, in order to fill the buffer with data.

Syntax

#include "edtinc.h"

void *edt_next_writebuf(EdtDev *edt_p) ;

Arguments

edt_p

device handle returned from edt_open or edt_open_channel.

Return

Returns a pointer to the buffer, or NULL on failure. If an error occurs, call edt_perror() to get the

system error message.

edt_set_buffer

Description

Sets which buffer should be started next. Usually done to recover after a timeout, interrupt, or error.

Arguments

edt_p

device handle returned from edt_open or edt_open_channel.

Syntax

#include "edtinc.h"

void *edt_next_writebuf(EdtDev *edt_p) ;

Example

u_int curdone;

edt_stop_buffers(edt_p);

curdone=edt_done_count(edt_p);

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 90 91

Kommentare zu diesen Handbüchern

Keine Kommentare

CDA CD 60 Spezifikationen Seite 24

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Kochfelder CDA CD 60