Applications - CAN System Engineering - page 259

Fig. 5.3 Function allocation on electronic control units (ECUs)

all OEMs. For that reason, those parts of the system basis functions which are still
company specific are allocated in the so-called Complex Device Drivers .
Figure 5.3 shows a solution for the control of headlights.
The interconnection of ECUs with AUTOSAR software architecture can be real-
ized without any problem.

5.2 Time-Triggered Controller Area Network

(TTCAN)—Applications

The following application example is a research educational prototype steer-by-
wire and brake-by-wire system which is built on a basic software implementation
of the time-triggered controller area network (TTCAN) protocol.

5.2.1 Software Implementation of TTCAN X-by-Wire

A current trend in the automotive industry is to replace certain mechanical compo-
nents in vehicles with ultra-dependable fault-tolerant electronic systems, referred to
as X-by-wire systems. Mechanical components such as drive belts, water pumps,
hydraulic brakes and steering columns can be replaced with electronic systems.