Technical reference
9
Example
The following code is a fragment of a C application demonstrating how to use
Streaming mode with the USB TC-08 driver:
//==================================================
// Setting up and running the unit in Streaming mode
//==================================================
usb_tc08_set_mains
(handle,
0
);
// use 50Hz mains noise rejection
for
(channel =
0
; channel <
9
; +)
{
// set each channel up as a type K thermocouple
// channel 0 is the cold junction and will be enabled
// by setting the third argument to anything other than ' '
usb_tc08_set_channel
(handle, channel,
'K'
);
}
// find out how fast the unit can sample in its current setup state
minimum_interval =
usb_tc08_get_minimum_interval_ms
(handle);
usb_tc08_run
(handle, minimum_interval);
// sample as fast as possible
// not required (just illustrates that the application
// can be idle while the driver collects the readings)
Sleep(
10000
);
// use a two dimensional array with an array of readings for each
channel
// In a real application, this would be a nested loop to regularly poll
// the unit for readings
for
(channel =
0
; channel <
9
; +)
{
no_of_readings =
usb_tc08_get_temp
( handle,
&reading_buffer[channel],
×_buffer[channel],
buffer_length,
&overflows[channel],
channel,
0
,
// degrees Celsius units
0
);
// do not fill missing readings
}
// finished polling, now do something with the readings
// if overflows[channel] is high, then one of the readings
// in reading_buffer[channel] has exceeded the input range
// of the USB TC-08
// only stop the unit when we've completely finished streaming
usb_tc08_stop
(handle);
Note: You should close down all other applications while you are performing any
timing-critical data logging tasks. Check that the Windows scheduler does not have
any activities planned during the logging session.
