static int pci6208_ao_insn_write(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int val = s->readback[chan];
int ret;
int i;
for (i = 0; i < insn->n; i++) {
val = data[i];
/* D/A transfer rate is 2.2us */
ret = comedi_timeout(dev, s, insn, pci6208_ao_eoc, 0);
if (ret)
return ret;
/* the hardware expects two's complement values */
outw(comedi_offset_munge(s, val),
dev->iobase + PCI6208_AO_CONTROL(chan));
s->readback[chan] = val;
}
return insn->n;
}
static unsigned int dmm32at_ai_get_sample(struct comedi_device *dev,
struct comedi_subdevice *s)
{
unsigned int val;
val = inb(dev->iobase + DMM32AT_AI_LSB_REG);
val |= (inb(dev->iobase + DMM32AT_AI_MSB_REG) << 8);
/* munge two's complement value to offset binary */
return comedi_offset_munge(s, val);
}
