void collect_fast_streaming_triggered (void)
{
unsigned long i;
FILE *fp;
short overflow;
int ok;
short ch;
unsigned long nPreviousValues = 0;
short values_a[BUFFER_SIZE_STREAMING];
short values_b[BUFFER_SIZE_STREAMING];
unsigned long triggerAt;
short triggered;
unsigned long no_of_samples;
double startTime = 0;
fprintf (stderr, "Ready to stream...\n" );
printf (stderr, "Press a key to start\n" );
getch ();
set_defaults ();
set_trigger_advanced ();
unitOpened.trigger.advanced.autoStop = 0;
unitOpened.trigger.advanced.totalSamples = 0;
unitOpened.trigger.advanced.triggered = 0;
//Enable and set channel A with AC coupling at a range of +/-2V
if(ps2000_set_channel(unitOpened.handle,PS2000_CHANNEL_A,TRUE,FALSE,PS2000_2V))
fprintf(stderr,"Channel A enabled and set..\n");
else
fprintf(stderr,"Unable to set channel A...\n");
//Disable channel B
if(ps2000_set_channel(unitOpened.handle,PS2000_CHANNEL_B,FALSE,FALSE,1))
fprintf(stderr,"Channel B disabled..\n");
else
fprintf(stderr,"Unable to set channel B...\n");
/* Collect data at 200ns intervals
* 100000 points with an agregation of 1 : 1
* Auto stop after the 100000 samples
* Start it collecting,
*/
if(!ps2000_run_streaming_ns ( unitOpened.handle, 200, 2, BUFFER_SIZE_STREAMING, 1, 1, 40000 ))
fprintf(stderr,"There was a problem running streaming...\n");
/* From here on, we can get data whenever we want...
*/
while (!unitOpened.trigger.advanced.autoStop)
{
ps2000_get_streaming_last_values (unitOpened.handle, ps2000FastStreamingReady);
if (nPreviousValues != unitOpened.trigger.advanced.totalSamples)
{
nPreviousValues = unitOpened.trigger.advanced.totalSamples;
}
Sleep (0);
}
ps2000_stop (unitOpened.handle);
no_of_samples = ps2000_get_streaming_values_no_aggregation (unitOpened.handle,
&startTime, // get samples from the beginning
values_a, // set buffer for channel A
values_b, // set buffer for channel B
NULL,
NULL,
&overflow,
&triggerAt,
&triggered,
BUFFER_SIZE_STREAMING);
fprintf(stderr,"%d samples collected, representing %d mains cycles",no_of_samples,no_of_samples/99000);
// if the unit triggered print out ten samples either side of the trigger point
// otherwise print the first 20 readings
/*for ( i = (triggered ? triggerAt - 10 : 0) ; i < ((triggered ? triggerAt - 10 : 0) + 20); i++)
{
for (ch = 0; ch < unitOpened.noOfChannels; ch++)
{
if (unitOpened.channelSettings[ch].enabled)
{
printf ("%d, ", adc_to_mv ((!ch ? values_a[i] : values_b[i]), unitOpened.channelSettings[ch].range) );
}
}
printf ("\n");
}
*/
//fp = fopen ( "data.txt", "w" );
for ( i = 0; i < no_of_samples; i++ )
{
printf ("%d ", adc_to_mv (values_a[i], unitOpened.channelSettings[0].range) );
}
printf ("\n");
//fclose ( fp );
getch ();
}
void collect_fast_streaming (void)
{
unsigned long i;
FILE *fp;
short overflow;
int ok;
short ch;
unsigned long nPreviousValues = 0;
short values_a[BUFFER_SIZE_STREAMING];
short values_b[BUFFER_SIZE_STREAMING];
unsigned long triggerAt;
short triggered;
unsigned long no_of_samples;
double startTime = 0;
printf ( "Collect fast streaming...\n" );
printf ( "Data is written to disk file (data.txt)\n" );
printf ( "Press a key to start\n" );
getch ();
set_defaults ();
/* You cannot use triggering for the start of the data...
*/
ps2000_set_trigger ( unitOpened.handle, PS2000_NONE, 0, 0, 0, 0 );
unitOpened.trigger.advanced.autoStop = 0;
unitOpened.trigger.advanced.totalSamples = 0;
unitOpened.trigger.advanced.triggered = 0;
/* Collect data at 10us intervals
* 100000 points with an agregation of 100 : 1
* Auto stop after the 100000 samples
* Start it collecting,
*/
ok = ps2000_run_streaming_ns ( unitOpened.handle, 10, PS2000_US, BUFFER_SIZE_STREAMING, 1, 100, 30000 );
printf ( "OK: %d\n", ok );
/* From here on, we can get data whenever we want...
*/
while (!unitOpened.trigger.advanced.autoStop)
{
ps2000_get_streaming_last_values (unitOpened.handle, ps2000FastStreamingReady);
if (nPreviousValues != unitOpened.trigger.advanced.totalSamples)
{
printf ("Values collected: %ld\n", unitOpened.trigger.advanced.totalSamples - nPreviousValues);
nPreviousValues = unitOpened.trigger.advanced.totalSamples;
}
Sleep (0);
}
ps2000_stop (unitOpened.handle);
no_of_samples = ps2000_get_streaming_values_no_aggregation (unitOpened.handle,
&startTime, // get samples from the beginning
values_a, // set buffer for channel A
values_b, // set buffer for channel B
NULL,
NULL,
&overflow,
&triggerAt,
&triggered,
BUFFER_SIZE_STREAMING);
// print out the first 20 readings
for ( i = 0; i < 20; i++ )
{
for (ch = 0; ch < unitOpened.noOfChannels; ch++)
{
if (unitOpened.channelSettings[ch].enabled)
{
printf ("%d, ", adc_to_mv ((!ch ? values_a[i] : values_b[i]), unitOpened.channelSettings[ch].range) );
}
}
printf ("\n");
}
fp = fopen ( "data.txt", "w" );
if (fp != NULL)
{
for ( i = 0; i < no_of_samples; i++ )
{
for (ch = 0; ch < unitOpened.noOfChannels; ch++)
{
if (unitOpened.channelSettings[ch].enabled)
{
fprintf ( fp, "%d, ", adc_to_mv ((!ch ? values_a[i] : values_b[i]), unitOpened.channelSettings[ch].range) );
}
}
fprintf (fp, "\n");
}
fclose ( fp );
}
else
printf("Cannot open the file data.txt for writing. \nPlease ensure that you have permission to access. \n");
getch ();
}
