SMART I/O User’s Manual
©1996 PEP Modular Computers GmbH
March 12, 1996
Page 5 - 65
5
Chapter 5 Analog Modules
To compile the source, execute the following commands at the shell prompt:
> chd /<dev>/APPLIC/SMART
> make all
To execute the example:
load /<dev>/BSP/SMART/SMADC/adc_task
* load HW task
load /<dev>/APPLIC/SMART/CMDS/demoadc
* load example
demoadc [slot]
Slot = 0,1 .. 10 specifies the port of the SM-THERM module. (Default = 0)
Note that the procedure names are generic and are applicable to both the
SM-PT100 and SM-THERM modules.
Initialization
To start the HW Task, the OS-9 module
adc_task
must be loaded, then the
function
SMADCInit
must be called. To read data from a channel, the type of
sensor attached to it must be known. The PEP header file
BSP/SMART/
SMADC/DEFS/smadc.h
contains a list of sensors that are supported. To set
the sensor type, the function
SMADCSetSensorType
needs to be called.
Read RAW Data
To force the HW task to read RAW data from a channel, the function
SMADCEnableRead
must be called. As soon as the HW task has received
data from this channel, a flag is set indicating a valid RAW value. Now the
user’s application is able to read this value by using the function
SMADCReadRaw
.
