- /* Update the hardware to the new configuration */
- /* outw(s->io_bits, dev->iobase + SKEL_DIO_CONFIG); */
+ /* The input or output configuration of each digital line is
+ * configured by a special insn_config instruction. chanspec
+ * contains the channel to be changed, and data[0] contains the
+ * value COMEDI_INPUT or COMEDI_OUTPUT. */
+ switch (data[0]) {
+ case INSN_CONFIG_DIO_OUTPUT:
+ s->io_bits |= 1 << chan;
+ break;
+ case INSN_CONFIG_DIO_INPUT:
+ s->io_bits &= ~(1 << chan);
+ break;
+ case INSN_CONFIG_DIO_QUERY:
+ data[1] =
+ (s->io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT;
+ return insn->n;
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+ /* outw(s->io_bits,dev->iobase + SKEL_DIO_CONFIG); */