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Technical reference
13
Example
The following code is a fragment of a C application demonstrating how to use legacy
mode with the USB TC-08 driver:
//==========================================================
// Setting up and running the unit in Legacy mode
// This is designed to make it easier to adapt code written
// for the Serial TC08 for use with the USB TC08
//==========================================================
usb_tc08_set_mains(handle, 0); // use 50Hz mains noise rejection
for (channel = 1; channel < 9; channel++)
{
// set each channel up as a type K thermocouple
// switch off filtering for all channels
usb_tc08_legacy_set_channel(handle, channel, 'K', 0);
}
usb_tc08_legacy_run(handle);
last_cycle_no = 0;
no_of_readings = 0;
while (no_of_readings < 50) // collect 50 readings
{
usb_tc08_legacy_get_cycle(handle, &this_cycle_no);
if (last_cycle_no != this_cycle_no)
{
last_cycle_no = this_cycle_no;
no_of_readings++;
for (channel = 1; channel < 9; channel++)
{
usb_tc08_legacy_get_temp( &reading[channel],
handle,
channel,
0);
}
// now do something with the readings
// check that they have not overflowed
// by comparing each reading with 2147483647L
// or LONG_MAX (include limits.h)
usb_tc08_legacy_get_cold_junction(handle, &cold_junction);
// now do something with the cold junction temperature
}
}
usb_tc08_stop(handle);