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ADC-100 User's Guide14

3.3.12

adc100_set_interval

PREF1 unsigned long PREF2 adc100_set_interval (

unsigned long us_for_block,

unsigned long ideal_no_of_samples,

short mode);

This routine specifies the time interval per sample and the channels to be used for

calls to adc100_get_values or adc100_get_times_and_values.

An example of a call to this routine using both channels A and B is:

adc100_set_interval (10000, 100, 2);

The routine returns the actual time to collect this number of samples. This actual time

may be greater than the target time if you specified a sampling interval that is faster

than your computer can manage. If the specified sampling rate was too fast, you have

the following choices:

If the total time is important, collect fewer than the ideal number of samples so

that the total block time is correct

If the number of samples is important, collect the same number of samples then

allow for the fact that they took longer to collect.

Arguments:

us_for_block

- target total time in which to collect

ideal_no_of samples, in microseconds

ideal_no_of_samples

- specifies the number of samples that you

intend to collect. This number is only used for

timing calculations: you can actually collect a

different number of samples when you call

adc100_get_values

mode

0 - channel A only

1 - channel B only

2 - both channels

no_of_channels

- specifies the number of channels to be used

Returns:

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