| /* |
| kcomedilib/dio.c |
| implements comedi_dio_*() functions |
| |
| COMEDI - Linux Control and Measurement Device Interface |
| Copyright (C) 2000 David A. Schleef <ds@schleef.org> |
| |
| 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 "../comedi.h" |
| #include "../comedilib.h" |
| |
| #include <linux/string.h> |
| |
| int comedi_dio_config(void *dev, unsigned int subdev, unsigned int chan, |
| unsigned int io) |
| { |
| struct comedi_insn insn; |
| |
| memset(&insn, 0, sizeof(insn)); |
| insn.insn = INSN_CONFIG; |
| insn.n = 1; |
| insn.data = &io; |
| insn.subdev = subdev; |
| insn.chanspec = CR_PACK(chan, 0, 0); |
| |
| return comedi_do_insn(dev, &insn); |
| } |
| |
| int comedi_dio_read(void *dev, unsigned int subdev, unsigned int chan, |
| unsigned int *val) |
| { |
| struct comedi_insn insn; |
| |
| memset(&insn, 0, sizeof(insn)); |
| insn.insn = INSN_READ; |
| insn.n = 1; |
| insn.data = val; |
| insn.subdev = subdev; |
| insn.chanspec = CR_PACK(chan, 0, 0); |
| |
| return comedi_do_insn(dev, &insn); |
| } |
| |
| int comedi_dio_write(void *dev, unsigned int subdev, unsigned int chan, |
| unsigned int val) |
| { |
| struct comedi_insn insn; |
| |
| memset(&insn, 0, sizeof(insn)); |
| insn.insn = INSN_WRITE; |
| insn.n = 1; |
| insn.data = &val; |
| insn.subdev = subdev; |
| insn.chanspec = CR_PACK(chan, 0, 0); |
| |
| return comedi_do_insn(dev, &insn); |
| } |
| |
| int comedi_dio_bitfield(void *dev, unsigned int subdev, unsigned int mask, |
| unsigned int *bits) |
| { |
| struct comedi_insn insn; |
| unsigned int data[2]; |
| int ret; |
| |
| memset(&insn, 0, sizeof(insn)); |
| insn.insn = INSN_BITS; |
| insn.n = 2; |
| insn.data = data; |
| insn.subdev = subdev; |
| |
| data[0] = mask; |
| data[1] = *bits; |
| |
| ret = comedi_do_insn(dev, &insn); |
| |
| *bits = data[1]; |
| |
| return ret; |
| } |