SMART I/O User’s Manual
March 12, 1996
©1996 PEP Modular Computers GmbH
Page 5 - 66
Chapter 5 Analog Modules
Read Temperature Values
The HW task is prepared with a function that converts RAW values of a
channel to degrees Celsius. To enable this facility, the function
SMADCEnableConversion
must be called after calling
SMADCEnableRead.
If the HW task has calculated these converted values, the function
SMADCReadConverted
can be used to get the value.
Calibration
Before the first value is fetched from the ADC, a calibration cycle is per-
formed by the HW task. The user also has the facility to force the HW task
to execute a calibration cycle by calling either
SMADCCalibrate
for one
calibration or
SMADCSetCyclicCalib
. Then a calibration is executed if a
user defined interval has expired.
Deinitialization
If the task calling the SMADC library function finishes, the function
SMADCDeInit
should be called by this task to free memory and resources
otherwise tied up with the application.
Other Functions
For more information on other functions, refer to the description of the
functions later in this document or the example
demoadc.c
.
LEDs
Both LEDs on the SM-THERM module are used to show the status of the
HW task. LED1 is the upper one; LED2 is the lower one.
L E D 1 L E D 2
S t a t u s
off
off
ADC is not in use
on
off
Calibration in progress
off
on
AD conversion in progress
on
on
Standardisation to reference value in progress
