Rockwell Automation 6008-SV2R VMEbus remote I/O Scanner User Manual
Page 157
![background image](/manuals/580456/157/background.png)
Chapter
Programming the Scanner
8
8Ć23
/*
**
** READ_CSA() –– read control status area
**
**
This function reads a 6008–SV2 channel’s control/status area and returns the data
**
to the caller.
**
**
parameters:
pointer to a csa_data struct
**
return value:
none
**
*/
void
read_csa (channel far *chan, csa_data far *param)
{
csa_data far *csaptr;
/* map channel & establish pointers */
map_channel(chan);
csaptr = (csa_data far *) chan–>ControlStatusArea;
/* copy VME csarea to local structure */
param–>opstat
= csaptr–>opstat;
param–>cnfstat
= csaptr–>cnfstat;
param–>cmd
= csaptr–>cmd;
param–>addr
= csaptr–>addr;
param–>tag
= csaptr–>tag;
param–>irq
= csaptr–>irq;
param–>semaphore
= csaptr–>semaphore;
param–>datalen
= csaptr–>datalen;
/* unmap the channel */
unmap_channel(chan);
return;
}
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