PICO USB TC-08

USB TC-08 Help
31
© 2005 Pico Technology Limited. All rights reserved.
USBTC08044-2
3.3.4.3
usb_tc08_legacy_get_temp
short usb_tc08_legacy_get_temp (long * temp,
short handle,
short channel,
short filtered)
Once you open the driver and define some channels, you can call the
usb_tc08_legacy_run
routine. The driver will then constantly take readings from the USB
TC-08. Temperatures are returned in hundredths of a degree Celsius and voltages are
returned in microvolts.
Arguments:
channel
-
Specifies from which channel to read temperature.
Should
be 0 for CJC, 1 for Channel 1, 2 for Channel 2 and so on.
temp
- Pointer to a location where readings are to be placed.
Each reading should be compared with 2147483647L or
LONG_MAX (include limits.h) to check for overflows.
An
overflow occurs when the input signal is higher than the
measuring range of the USB TC-08.
filtered
- Specifies whether or not to filter the data.
The readings are
median filtered if set to 1. 0 causes the unfiltered
temperature to be stored in
temp
. The filter has a depth
defined by the filter factor, set during a
usb_legacy_set_channel
call.
Returns:
0
- Use
usb_tc08_get_last_error
.
1
- Temperature retrieval successful.
Note: Do not call this function unless you are operating the USB TC-08 in legacy mode,
having called
usb_tc08_legacy_run
.