diff options
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/comedi/drivers/comedi_test.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/staging/comedi/drivers/comedi_test.c b/drivers/staging/comedi/drivers/comedi_test.c index cc35bd6..0215228 100644 --- a/drivers/staging/comedi/drivers/comedi_test.c +++ b/drivers/staging/comedi/drivers/comedi_test.c @@ -97,7 +97,6 @@ static unsigned short fake_sawtooth(struct comedi_device *dev, binary_amplitude *= devpriv->uvolt_amplitude; do_div(binary_amplitude, krange->max - krange->min); - current_time %= devpriv->usec_period; value = current_time; value *= binary_amplitude * 2; do_div(value, devpriv->usec_period); @@ -125,7 +124,6 @@ static unsigned short fake_squarewave(struct comedi_device *dev, const struct comedi_krange *krange = &s->range_table->range[range_index]; - current_time %= devpriv->usec_period; value = s->maxdata; value *= devpriv->uvolt_amplitude; do_div(value, krange->max - krange->min); @@ -206,20 +204,24 @@ static void waveform_ai_interrupt(unsigned long arg) num_scans = comedi_nscans_left(s, num_scans); for (i = 0; i < num_scans; i++) { + unsigned long scan_remain_period = devpriv->scan_period; + for (j = 0; j < cmd->chanlist_len; j++) { unsigned short sample; + if (devpriv->usec_current >= devpriv->usec_period) + devpriv->usec_current %= devpriv->usec_period; sample = fake_waveform(dev, CR_CHAN(cmd->chanlist[j]), CR_RANGE(cmd->chanlist[j]), - devpriv->usec_current + - i * devpriv->scan_period + - j * devpriv->convert_period); + devpriv->usec_current); comedi_buf_write_samples(s, &sample, 1); + devpriv->usec_current += devpriv->convert_period; + scan_remain_period -= devpriv->convert_period; } + devpriv->usec_current += scan_remain_period; } - - devpriv->usec_current += elapsed_time; - devpriv->usec_current %= devpriv->usec_period; + if (devpriv->usec_current >= devpriv->usec_period) + devpriv->usec_current %= devpriv->usec_period; if (cmd->stop_src == TRIG_COUNT && async->scans_done >= cmd->stop_arg) async->events |= COMEDI_CB_EOA; |