1X00416H01電源模塊,WH5-2FF配置教程
要求CPU要低功耗和有足夠的時鐘頻率來運行操作系統(tǒng)，以滿足便攜式的要求；另一方面也要求其有足夠種類的接口，以利于性能的擴展?；谝陨峡紤]，在開發(fā)平臺中選用HY7202作為CPU。
DSP作為數(shù)據(jù)運算部分，可以充分發(fā)揮其對數(shù)字信號處理的獨特優(yōu)勢。TI公司的C54xx系列16位定點DSP以其高性價比普遍應(yīng)用于各類通信、便攜式應(yīng)用當(dāng)中?？紤]到對數(shù)字視頻和數(shù)字圖像等大數(shù)據(jù)吞吐量應(yīng)用場合的處理要求，選用TI公司的TMS320C5416芯片。其時鐘頻率最高可達到206 MHz，系統(tǒng)總體框圖如圖1所示。
1X00416H01電源模塊,WH5-2FF配置教程系統(tǒng)軟件平臺結(jié)構(gòu)如圖2所示，軟件平臺分ARM部分和DSP部分，以及ARM和DSP的接口軟件設(shè)計部分。ARM部分以Hynix公司PATCH的ARM Linux Version 2.4.18為操作系統(tǒng)，并在此基礎(chǔ)之上移植Linux標(biāo)準(zhǔn)庫GLIBC、LIBJPG、LIBPNG、IMLIB、LIBWWW、LIBFLASH及漢字庫。圖形界面以Microwindows 0.9及其控件庫FLNX提供嵌入式圖形界面平臺。系統(tǒng)平臺具有強大的網(wǎng)絡(luò)通信功能，通過平臺WEBSERVER、FTP、TELNET、INETD等網(wǎng)絡(luò)工具和應(yīng)用程序能方便地開發(fā)基于Internet的網(wǎng)絡(luò)終端、遠程控制、遠程數(shù)據(jù)采集、遠程數(shù)據(jù)處理產(chǎn)品。在應(yīng)用程序?qū)由希到y(tǒng)平臺集成窗口管理程序，全中文化網(wǎng)絡(luò)瀏覽器(支持HTML、XML)，F(xiàn)lash播放器(支持Flash4、Flash5、Flash6)，文本編輯器，游戲等用于PDA開發(fā)，機頂盒上網(wǎng)解決方案，以及可用于嵌入式數(shù)據(jù)采集、處理的虛擬示波器等。
DSP部分通過提供完整的HPI驅(qū)動程序(DSP部分)及通信協(xié)議，通過增加相應(yīng)數(shù)據(jù)處理程控制算法程序，利用HPI并行接口與主機ARM通信進行數(shù)據(jù)交換，可用于各種實時處理，控制領(lǐng)域。
此外，DSP和ARM可以各自作為獨立的系統(tǒng)使用，它們均有完整的子系統(tǒng)軟件。子系統(tǒng)之間聯(lián)系的核心是DSP器件本身帶有的HPI接口。
2 ARM和DSP的通信接口設(shè)計
（1） DSP的HPI口介紹
HPI是TMS320C54X等芯片提供的一種并行端口，專門用于DSP和外部主機并行通信。HPI接口有標(biāo)準(zhǔn)HPI
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