| logiCRAFT3 汽车多媒体方案（Xilinx） |
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Xilinx 公司的logiCRAFT3 汽车多媒体解决方案是基于logiCRAFT2平台，采用Spartan-3E 3S250E/500E/1200E 256引脚FPGA，是汽车和工业市场的多媒体显示开发平台，支持各种视频输入和输出标准如CVBS 或支持AL/NTSC/SECAM的S-Video 以及一/两双绞线对单线 LVDS，提供音频输入和输出功能，能通过CAN 和RS232进行连接，并具有Apple iPod兼容的串行接口以及基于Cambridge Silicon Radio的蓝牙模块 。还能提供触摸屏的控制。本文介绍了开发平台logiCRAFT3的主要性能，功能方框图以及汽车后座娱乐应用，仪表集群应用和工业应用的平台/FPGA 架构。
A Compact Multimedia Display Development Platform for Automotive and Industrial Markets
The logiCRAFT Platform
The logiCRAFT3 is based on the logiCRAFT2 platform. Its smaller form factor is intended to retrofit a 7“ LCD, targeting single and remote display applications in the automotive environment.
图1。logiCRAFT 3多媒体开发平台外形图
The logiCRAFT 3 compact multimedia display development platform (Figure 1) is an FPGA-based board using hardware modules in the form of IP cores to develop FPGA functionality. The platform is designed to support a wide variety of audio and video sources and handle a variety of display types. With several standard communication interfaces, you can easily integrate the logiCRAFT 3 platform into a larger system. Figure 2 shows logiCRAFT 3’s functional blocks.
A wide variety of system interfaces such as audio/video (A/V) I/Os, line drivers,
general-purpose I/Os, and COG power supplies makes this platform extremely versatile.
The logiCRAFT 3 platform is primarily aimed at the automotive market, including applications such as navigation, infotainment, rear-seat entertainment (RSE), and driver assistance. Other multimedia applications are equally applicable, such as consumer,
medical, and measurement instrumentation or factory automation applications.
Figure 3 shows block schematics of an automotive RSE system. In this particular
example, the logiCRAFT 3 is used in the car headrests and serves to deliver A/V content.
The platform’s flexibility can help reduce overall solution costs as well as time to market. For example, the platform’s capability to fully support a number of different displays enables you to make selections when required for cost or availability.
Implementing high-quality wireless audio through two embedded IR headphone audio
outputs for the RSE is also an opportunity to reduce system cost. The FM modulation is
implemented using the logiAIR IP core, enabling the use of a low-cost field effect
transistor (FET) for IR LED driving. There is also the flexibility to enable Bluetooth with
the addition of a Bluetooth module.
Audio and video streams, as well as control data, are transferred to the RSE headrest
unit by using an embedded high-speed Gbps digital link. The low data-rate content, such as push-button status, remote controller data, touch-screen data, and others are transferred using the same link.
The link itself requires only two twisted pair lines. One line may also be used for powering the platform, resulting in a significant reduction in infotainment wiring costs. You can have the A/V devices connected to the logiCRAFT 3 through the composite video blanking and sync (CVBS) or S-video inputs (video) and stereo line inputs (audio). An iPod can also be connected as required.
The logiCRAFT 3 platform can also be used in stand-alone human machine interface
(HMI) applications such as:
Instrument cluster applications
Car radio and navigation
Industrial and medical instrumentation
In these applications, you can use either the CAN network connection for all data
transfer or the standard RS232 channel for communication and debugging. For applications requiring HMI control, an embedded IR remote control sensor, touch-screen
interfaces, and GPIO for buttons and LEDs are provided.
You can also add features by using Xilinx LogiCORE™ IP, other third-party IP cores, or by designing a custom circuit.
The list of key IP cores that can be utilized on the logiCRAFT 3 includes:
logiCVC-ML – compact multilayer video controller
logi2D – 2-D graphics accelerator
logiCAN – CAN 2.0B-compatible network controller
logiUART – universal asynchronous receiver/transmitter
logiWIN – versatile video input
logiMEM – flexible SDRAM/DDRAM/ flash memory controller
logiI2S – I2S transceiver
logiRC – IR remote controller receiver
logiAIR – digital FM modulator for IR headphones
Spartan-3E FPGA hardware resources, dedicated multipliers, digital clock managers (DCMs), and block RAMs ensure that IP cores operate at higher speeds and consume less area on the FPGA.
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