NAME    [Toc]    [Back]

     daadio - MATRIX  MD-DAADIO  digital/analog,  analog/digital,
parallel i/o
     board

SYNOPSIS    [Toc]    [Back]

     daadio* at fvme? addr 0x0 level 1 vect 0x1f

DESCRIPTION    [Toc]    [Back]

     The daadio driver provides ioctl(2) entry points to read and
write analog/digital,
 digital/analog, and parallel input/output  registers.  A typical
  daadio  has  6 8bit parallel ports, 8 12bit DAC ports,
and 32 12bit
     ADC ports.

     The daadio has a large number of configuration options,  but
the driver
     does not.  For the ADC, only simple polled mode is supported
(there is no
     support for single cycle sampling).

IOCTLS    [Toc]    [Back]

     The daadio device responds to the following  ioctl(2)  calls
defined in
     <machine/daadioio.h>:

     DIOGPIO    (struct daadio_pio) Get the value of the parallel
port dap_reg
               and store it in dap_val.  The  argument  structure
is defined as
               follows:

                     struct daadio_pio {
                             u_int8_t dap_reg;
                             u_int8_t dap_val;
                     };

     DIOSPIO    (struct daadio_pio) Set the value of the parallel
port dap_reg
               to the value in dap_val.

     DIOSDAC   (struct daadio_dac) Set the value of the DAC  port
in dac_reg to
               the  value  in dac_val.  The argument structure is
defined as
               follows:

                     struct daadio_dac {
                             u_int8_t dac_reg;
                             u_int16_t dac_val;
                     };

     DIOGADC   (struct daadio_adc) Get the value of the ADC  port
specified in
               dad_reg  into  dad_val.   The  lower  12  bits  of
dad_val are the
               conversion value, the upper four bits are used for
status.  The
               argument structure is defined as follows:

                     struct daadio_adc {
                             u_int8_t dad_reg;
                             u_int16_t dad_val;
                     #define ADC_IV 0x1000 /* out of range */
                     #define ADC_PR 0x2000 /* pipeline empty */
                     #define ADC_DR 0x4000 /* data ready */
                     #define ADC_OW 0x8000 /* data overwritten */
                     #define ADC_VAL 0x0fff /* the data */
                     };

SEE ALSO    [Toc]    [Back]

     ioctl(2), fvme(4), intro(4)

HISTORY    [Toc]    [Back]

     OpenBSD support for the daadio  first  appeared  in  OpenBSD
2.6.

OpenBSD      3.6                           July      7,      2002