comedi_command_test — test streaming input/output configuration
#include <comedilib.h>
int comedi_command_test( | comedi_t * device, |
comedi_cmd * command); |
The function comedi_command_test tests the command structure pointed
to by the parameter command and returns an
integer describing the
testing stages that were successfully passed. In addition, if elements
of the comedi_cmd structure are invalid, they may be modified. Source
elements are modified to remove invalid source triggers. Argument
elements are adjusted or rounded to the nearest valid value.
The meanings of the return value are as follows:
0 indicates a valid command.
1 indicates that one of the
…_src
members of the command contained an
unsupported trigger. The bits corresponding to the unsupported
triggers are zeroed.
2 indicates that the particular combination
of …_src settings is not supported by the driver, or that
one of the …_src members has the bit corresponding to
multiple trigger sources set at the same time.
3 indicates that one of the
…_arg members
of the command is set outside the range of allowable values.
For instance, an argument for a
TRIG_TIMER source which
exceeds the board's maximum speed. The invalid
…_arg
members will be adjusted to valid values.
4 indicates that one of the
…_arg members
required adjustment. For instance, the argument of a
TRIG_TIMER source may have been rounded to the nearest
timing period supported by the board.
5 indicates that some aspect of the
command's chanlist is unsupported by the board. For example,
some analog input boards require that all channels in the chanlist
use the same input range.
On failure, -1 is returned.