USB簡(jiǎn)化射頻鏈路設(shè)計(jì)

　　開(kāi)發(fā)連接的無(wú)線應(yīng)用程序需要兩個(gè)主要任務(wù)。首先，您的設(shè)計(jì)必須執(zhí)行指定的功能，第二，它必須與主機(jī)PC、筆記本、平板電腦或智能手機(jī)通信。

　　在廣受歡迎的RS-232端口是可用的，一個(gè)簡(jiǎn)單的3線接口是所有需要連接外設(shè)，數(shù)據(jù)連接、I/O、傳感器和更多的主機(jī)。通常，幾百甚至一千英尺低成本的電線允許可靠的點(diǎn)對(duì)點(diǎn)通信。

　　簡(jiǎn)單的平行式并行端口是從PC容易到你的接口板，得到8位輸出塊的另一種簡(jiǎn)單的方法。就新設(shè)備而言，這兩個(gè)接口已經(jīng)幾乎絕跡了。

　　相反，Wi-Fi，ZigBee，6LoPAN，RF4CE，藍(lán)牙和其他無(wú)線協(xié)議是引導(dǎo)我們進(jìn)入一個(gè)世界，連接電纜都是過(guò)去的事。雖然有些標(biāo)準(zhǔn)集成到主板、智能手機(jī)和其他類似的設(shè)備中，但有些插件可以作為插件模塊，為您的設(shè)計(jì)提供必要的功能。

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As you will want to have a universal and reliable communications scheme when developing either a stand-alone wireless application or one that is available as a plug-in module, USB may be the ideal choice, particularly since PCs and advanced microcontrollers support USB directly,

This article discusses the use of USB as an RF link and development mechanism for wireless design applications. It examines off-the-shelf USB-to-RF modules, as well as example development platforms that demonstrate wireless reference designs through USB connectivity. The latter products let you use USB connectivity to provide control and access to development platforms so you can custom tailor your own wireless solution.?