Vehicle telematics gateway
A vehicle telematics gateway, also known as a Telematics Control Unit (TCU) interfaces with the rest of the vehicle domain controllers via Controller Area Network (CAN), automotive Ethernet, or other vehicle network protocols, as shown in Figure 10.14. The TCU hardware block diagram, as shown in the previous chapter in Figure 9.9, has an Application Processor (AP) and a Vehicle Interface Processor (VIP).
Figure 10.14 – Vehicle gateway interfacing with other domain controllers in the vehicle
The VIP is a microcontroller and in this context interfaces with the vehicle CAN and the AP. Typical APs don’t have a built-in CAN transceiver and hence there is a need for a VIP. In the automotive context, most microcontrollers support the Classic AUTOSAR software stack. CAN traffic is routed to the AP via a Serial Peripheral Interface (SPI) or Universal Asynchronous Receiver-Transmitter (UART) interface. In addition, the VIP...