void generic_prep_dac_caldacs( calibration_setup_t *setup,
const generic_layout_t *layout, unsigned int channel, unsigned int range )
{
int retval;
if( setup->da_subdev < 0 ) return;
if( setup->old_calibration == NULL )
{
reset_caldac( setup, layout->dac_offset( channel ) );
reset_caldac( setup, layout->dac_gain( channel ) );
reset_caldac( setup, layout->dac_linearity( channel ) );
reset_caldac( setup, layout->dac_offset_fine( channel ) );
reset_caldac( setup, layout->dac_gain_fine( channel ) );
reset_caldac( setup, layout->dac_linearity_fine( channel ) );
}else
{
retval = comedi_apply_parsed_calibration( setup->dev, setup->da_subdev,
channel, range, AREF_GROUND, setup->old_calibration );
if( retval < 0 )
{
DPRINT( 0, "Failed to apply existing calibration, reseting dac caldacs.\n" );
reset_caldac( setup, layout->dac_offset( channel ) );
reset_caldac( setup, layout->dac_gain( channel ) );
reset_caldac( setup, layout->dac_linearity( channel ) );
reset_caldac( setup, layout->dac_offset_fine( channel ) );
reset_caldac( setup, layout->dac_gain_fine( channel ) );
reset_caldac( setup, layout->dac_linearity_fine( channel ) );
}
}
}
static void generic_prep_adc_for_dac( calibration_setup_t *setup,
comedi_calibration_t *calibration, int observable )
{
unsigned int adc_channel, adc_range;
int chanspec;
if( observable < 0 ) return;
chanspec = setup->observables[ observable ].observe_insn.chanspec;
adc_channel = CR_CHAN( chanspec );
adc_range = CR_RANGE( chanspec );
comedi_apply_parsed_calibration( setup->dev, setup->ad_subdev,
adc_channel, adc_range, 0, calibration );
}
/**
* facq_comedi_misc_get_polynomial:
* @dev: A comedi_t device.
* @subindex: The subdevice index.
* @chanlist: A #FacqChanlist object.
* @err: A #GError.
*
* The functions makes some magic to obtain a per channel,
* comedi_polynomial_t array. Each polynomial can be used
* to convert from comedi data to physical samples.
* See <function>comedi_to_physical()</function> for more
* info.
*
* Returns: An array of comedi_polynomial_t members. Free it
* when it's no longer needed. %NULL in case of error.
* The array length equals the number of I/O Channels in the
* chanlist.
*/
comedi_polynomial_t *facq_comedi_misc_get_polynomial(comedi_t *dev,guint subindex,const FacqChanlist *chanlist,GError **err)
{
guint subd_flags = 0;
guint i = 0, chan = 0, range = 0, aref = 0, iochans_n = 0;
guint chanspec = 0;
gchar *cal_filename = NULL;
comedi_calibration_t *cc = NULL;
GError *local_err = NULL;
comedi_polynomial_t *p = NULL;
g_return_val_if_fail(FACQ_IS_CHANLIST(chanlist),NULL);
iochans_n = facq_chanlist_get_io_chans_n(chanlist);
if(iochans_n < 1){
g_set_error_literal(&local_err,FACQ_COMEDI_MISC_ERROR,
FACQ_COMEDI_MISC_ERROR_FAILED,
"Chanlist is empty");
goto error;
}
cal_filename = comedi_get_default_calibration_path(dev);
if(!cal_filename){
g_set_error_literal(&local_err,FACQ_COMEDI_MISC_ERROR,
FACQ_COMEDI_MISC_ERROR_FAILED,
comedi_strerror(comedi_errno()));
goto error;
}
cc = comedi_parse_calibration_file(cal_filename);
if(!cc){
g_set_error_literal(&local_err,FACQ_COMEDI_MISC_ERROR,
FACQ_COMEDI_MISC_ERROR_FAILED,
comedi_strerror(comedi_errno()));
goto error;
}
g_free(cal_filename);
subd_flags = comedi_get_subdevice_flags(dev,subindex);
if(subd_flags < 0){
g_set_error_literal(&local_err,FACQ_COMEDI_MISC_ERROR,
FACQ_COMEDI_MISC_ERROR_FAILED,
comedi_strerror(comedi_errno()));
goto error;
}
for(i = 0;i < iochans_n;i++){
chanspec = facq_chanlist_get_io_chanspec(chanlist,i);
facq_chanlist_chanspec_to_src_values(chanspec,
&chan,
&range,
&aref,
NULL);
if( comedi_apply_parsed_calibration(dev,subindex,
chan,
range,
aref,
cc) < 0){
g_set_error_literal(&local_err,FACQ_COMEDI_MISC_ERROR,
FACQ_COMEDI_MISC_ERROR_FAILED,
comedi_strerror(comedi_errno()));
goto error;
}
}
if(subd_flags & SDF_SOFT_CALIBRATED){
p = facq_comedi_misc_get_polynomial_soft(dev,
subindex,
chanlist,
cc,
&local_err);
comedi_cleanup_calibration(cc);
}
else {
comedi_cleanup_calibration(cc);
p = facq_comedi_misc_get_polynomial_hard(dev,
subindex,
chanlist,
&local_err);
}
if(!p)
goto error;
return p;
error:
if(cal_filename)
g_free(cal_filename);
if(cc)
comedi_cleanup_calibration(cc);
if(local_err)
g_propagate_error(err,local_err);
return NULL;
}
