+++ /dev/null
-/*
- 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
-
-
-