RDAIRPABPSI5UG , Rev. 2.0
Freescale Semiconductor
21
Installing the Software and Setting up the Hardware
6.2.4
FreeMASTER Debug Mode
Parameters of the devices MC33789, MC33797, or MMA6813KW, can be arbitrarily changed. Parameters are sent to the selected device
after the button press "Send Parameters To Reference Board". All meaningful device registers are shown in the registry table "Command
Responses Table" at the bottom of the each device page. For each cell in this table, a tool-tip help is available. View these tips, hover over
the cell to see descriptions of the selected register (For an example page see
Figure 8
).
Figure 8. FreeMASTER Debug Page for the MC33789 Device
After starting the watchdog refresh (Watchdog -> Enable), parameters "Safing Thresholds" and "Dwell Extensions" in MC33789 cannot
be changed.
6.2.5
FreeMASTER Application Mode
ARP Application mode permits the user to (see
Figure 9
):
•
View acceleration data from central and satellite accelerometers. These numerical values are displayed in points where
sensors should be placed inside the car.
•
View acceleration data plotted on a graph, which allows informative outlook to the acceleration levels of all sensors and
a simple car model simulation of the both front and side collisions. Plotted data is only informative, since transferred
data from sensors is averaged for illustration of ARP functionality only.
•
Simulate deployment of an airbag when the acceleration data reaches the threshold values. These thresholds are set
to very low limits, so even a soft hit of the satellite sensor to the ARP board will cause relevant airbags’ "deployment".
Airbags deployment is illustrated in the GUI thanks to front and side airbags pictures. (Any "collision" at the driver or
passenger location causes inflation of two front airbags. Impact from left side causes inflation of the left side airbags,
and impact from right side causes deployment of the right side airbags. Anytime after deployment, simulation is possible
to reset an inflated bag or bags by pressing button "Reset Deployed Airbags".
