Omega Speaker Systems TC-08 manual Example, ==================================================

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; channel++)

{

//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; channel++)

{

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.