96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
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/*
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kcomedilib/dio.c
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implements comedi_dio_*() functions
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COMEDI - Linux Control and Measurement Device Interface
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Copyright (C) 2000 David A. Schleef <ds@schleef.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "../comedi.h"
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#include "../comedilib.h"
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#include <linux/string.h>
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int comedi_dio_config(void *dev, unsigned int subdev, unsigned int chan,
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unsigned int io)
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{
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struct comedi_insn insn;
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memset(&insn, 0, sizeof(insn));
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insn.insn = INSN_CONFIG;
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insn.n = 1;
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insn.data = &io;
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insn.subdev = subdev;
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insn.chanspec = CR_PACK(chan, 0, 0);
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return comedi_do_insn(dev, &insn);
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}
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int comedi_dio_read(void *dev, unsigned int subdev, unsigned int chan,
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unsigned int *val)
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{
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struct comedi_insn insn;
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memset(&insn, 0, sizeof(insn));
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insn.insn = INSN_READ;
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insn.n = 1;
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insn.data = val;
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insn.subdev = subdev;
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insn.chanspec = CR_PACK(chan, 0, 0);
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return comedi_do_insn(dev, &insn);
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}
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int comedi_dio_write(void *dev, unsigned int subdev, unsigned int chan,
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unsigned int val)
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{
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struct comedi_insn insn;
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memset(&insn, 0, sizeof(insn));
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insn.insn = INSN_WRITE;
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insn.n = 1;
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insn.data = &val;
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insn.subdev = subdev;
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insn.chanspec = CR_PACK(chan, 0, 0);
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return comedi_do_insn(dev, &insn);
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}
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int comedi_dio_bitfield(void *dev, unsigned int subdev, unsigned int mask,
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unsigned int *bits)
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{
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struct comedi_insn insn;
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unsigned int data[2];
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int ret;
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memset(&insn, 0, sizeof(insn));
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insn.insn = INSN_BITS;
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insn.n = 2;
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insn.data = data;
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insn.subdev = subdev;
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data[0] = mask;
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data[1] = *bits;
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ret = comedi_do_insn(dev, &insn);
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*bits = data[1];
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return ret;
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}
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