Feature: Embedded design
Te architecture shown in Figure 5 is
suitable for both video processing and wireless communication management. By porting the DSP functionalities on to the FPGA, the Amanda processor can act as a system manager, free from having to implement a wireless communications stack. Since both the Amanda and FPGA have access to external memory, data can rapidly be exchanged between the processors and components. Te second infotainment setup, shown in Figure 6, highlights the FPGA’s ability to address both the incoming high-speed analogue data and handle compression and encoding needed for video applications. In fact, all this functionality can be pushed onto the FPGA, addressed in real time through parallel processing. By adding an FPGA to an existing
Figure 6: Infotainment FPGA co-processor architecture, example 2
real-time response of the system, but when moved to the FPGA, the situation improved: • De-randomisation was executed in real- time without bottlenecks;
• Te host processor’s computational overhead was significantly reduced, and it better performed a desired logging role.
• Te entire system performance was much improved.
Automotive infotainment example Sophisticated infotainment systems in cars are a customer-required feature – highly visible and expected to provide great functionality and exceptional performance. To address these requirements, signal processing and wireless communications are a must. Delphi Delco Electronics Systems’s
automotive entertainment architecture uses a Renesas MCU, the SH-4, with a companion ASIC, Hitachi’s HD64404 Amanda. Te satisfies over 75% of the automotive market’s baseline entertainment requirements, but it does not process video or offer wireless communication. Tese were resolved by adding an FPGA to the existing architecture and design.
hardware architecture, the proven performance of the existing hardware
Figure 7: Design flow implementation
www.electronicsworld.co.uk May 2022 21
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