Renesas Case Study
Partners
Renesas is a world-leading supplier of MCUs and SoCs, and its Renesas autonomyTM platform is a comprehensive solution for ADAS and autonomous driving. The RH850/V1R series is part of the Renesas autonomyTM platform, providing high-performance computing capabilities and programmable DSPs for better object recognition and dynamic identification.
Challenges
Synchronization of Raw Radar Data, Internal Controller Signals, and Network Signals
Developing radar solutions requires obtaining two types of data from radar sensors: raw radar data and algorithm data, the latter including lists of recognized targets and FFT computation results obtained via XCP data format. In such cases, raw data at transmission rates of 100MB/s and XCP data at 50MB/s may be received simultaneously. This data must be recorded along with other information, such as network signals. When measurement data is being transmitted, the microcontroller must not stop working; otherwise, radar data loss will occur.
Solutions
A Simple, Efficient Measurement and Calibration System with Data Tracking
The physical access to radar and XCP data is implemented by the VX1000 family of products. The connector (POD) is directly connected to the RH850/V1R microcontroller via two 3.125Gb/s Aurora interfaces. The POD transmits data to the VX1135 base module at a rate of 5Gb/s through a high-speed serial connection line (HSSL2). The VX1135 base module then sends raw data and XCP data to CANape via two Gigabit Ethernet interfaces. Special measurement methods are used to prevent raw radar data and XCP data from entering simultaneously, which could overload the Aurora interface and even lead to data loss. Any CAN/CAN-FD bus can be directly connected to the VX1135, and then data is transmitted to CANape via Ethernet interfaces. The Distributed High-Performance Recording module (DHPR) in CANape allows one sensor to connect to an independent recording module, making it faster and simpler to adapt to the raw data protocols of different manufacturers’ sensors. The recording module can efficiently utilize PC resources and can also be used by multiple PCs in a distributed environment. In this architecture, CANape is responsible for time synchronization, as well as starting, stopping, and condition-triggered measurement recording. Depending on the configuration of hardware resources, each PC can measure and record data at speeds of approximately 1GByte/s.
Advantages
An End-to-End Solution Perfectly Suited for RH850/V1R Microcontroller
> A universal measurement solution provided for different sensor manufacturers
> A fully plug-and-play system
> One POD can capture both raw radar data and XCP data; it can reduce the spatial requirements for radar layout while lowering integration costs
> Flexibly adjustable based on the number of sensors
> In CANape, all measurement data, including radar and camera sensors, ECUs, buses, analog measurements, etc., can achieve precise synchronization
