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oops, didn't mean to add this

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David Schleef 2000-03-30 00:21:43 +00:00
parent 1508d720e9
commit e30254a41c
1 changed files with 0 additions and 156 deletions
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lib/command.c
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@ -1,156 +0,0 @@
/*
lib/command.c
comedi library routines
COMEDILIB - Control and Measurement Device Interface Library
Copyright (C) 2000 David A. Schleef <ds@stm.lbl.gov>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <comedi.h>
#include <string.h>
#include <libinternal.h>
int comedi_data_write(comedi_t *it,unsigned int subdev,unsigned int chan,unsigned int range,
unsigned int aref,lsampl_t data)
{
comedi_trig cmd={
mode: 0,
flags: TRIG_WRITE,
n_chan: 1,
n: 1,
trigsrc: 0,
trigvar: 0,
trigvar1: 0,
};
sampl_t sdata=data;
if(!valid_chan(it,subdev,chan))
return -1;
chan=CR_PACK(chan,range,aref);
cmd.subdev=subdev;
if(it->subdevices[subdev].subd_flags & SDF_LSAMPL){
cmd.data=(sampl_t *)(&data);
}else{
cmd.data=&sdata;
}
cmd.chanlist=&chan;
return ioctl_trigger(it->fd,&cmd);
}
int comedi_data_read(comedi_t *it,unsigned int subdev,unsigned int chan,unsigned int range,
unsigned int aref,lsampl_t *data)
{
comedi_trig cmd={
mode: 0,
flags: 0,
n_chan: 1,
n: 1,
trigsrc: 0,
trigvar: 0,
trigvar1: 0,
};
int ret;
sampl_t sdata;
if(!valid_chan(it,subdev,chan))
return -1;
chan=CR_PACK(chan,range,aref);
cmd.subdev=subdev;
cmd.chanlist=&chan;
if(it->subdevices[subdev].subd_flags & SDF_LSAMPL){
cmd.data=(sampl_t *)data;
}else{
cmd.data=&sdata;
}
ret=ioctl_trigger(it->fd,&cmd);
if(ret<0)
return ret;
if(!(it->subdevices[subdev].subd_flags & SDF_LSAMPL)){
*data=sdata;
}
return 0;
}
#if 1
/*
I don't like this function, which is why it is marked out.
The problem is the sampl_t/lsampl_t fiasco, which is beginning
to be a PITA.
*/
int comedi_data_read_n(comedi_t *it,unsigned int subdev,unsigned int chan,unsigned int range,
unsigned int aref,unsigned int n,lsampl_t *data)
{
comedi_trig cmd;
unsigned int i;
int ret;
if(!valid_chan(it,subdev,chan))
return -1;
if(n==0)
return 0;
chan=CR_PACK(chan,range,aref);
memset(&cmd,0,sizeof(cmd));
cmd.mode=0;
cmd.n_chan=1;
cmd.subdev=subdev;
cmd.chanlist=&chan;
i=0;
while(i<n){
cmd.data=(void *)(data+i);
cmd.n=n-i;
ret=ioctl_trigger(it->fd,&cmd);
if(ret<0)
goto out;
i+=ret;
}
out:
if(i==0)return -1;
return (int)i;
}
#endif