ARM核心是主控SOC中的重要部分，系統(tǒng)的日常應(yīng)用都由ARM核心來完成，因此ARM核心的效能很大程度上跟用戶體驗有關(guān)。ARM公司一般用DMIPS/MHz來標稱ARM核心的性能。DMIPS是Dhrystone Million Instructions executed Per Second的縮寫，反映核心的整數(shù)計算能力。但Dhrystone算法代碼本身比較叫，可以完全放到Cache中執(zhí)行，因此反映的只是核心能力，并不能反映緩存、內(nèi)存I/O性能。
提出了一種以ARM微處理器為控制核心的遠程無線視頻監(jiān)控終端的設(shè)計方案，其監(jiān)控終端的硬件設(shè)計包括視頻采集處理、中央管理控制、無線傳輸3個模塊。并給出了監(jiān)控終端的軟件開發(fā)平臺和開發(fā)模式的系統(tǒng)啟動代碼、嵌入式Linux系統(tǒng)移植以及驅(qū)動程序和應(yīng)用程序。測試結(jié)果表明，該監(jiān)控終端設(shè)計方案合理、有效，基本滿足監(jiān)控需求。
Abstract:
A remote wireless video monitoring terminal design， which uses ARM microprocessor as its core control， is proposed in this paper.The hardware design of monitoring terminal system is composed of the video acquisition and processing module， the central management and control module， wireless transmission module.Meanwhile the monitoring terminal-s software development platform and development patterns are designed. Also the design of the system-s start codes， embedded Linux system-s transplantation process， driver and the corresponding applications are given. The results showed that the monitoring terminal design is reasonable， effective， basically meet monitoring requirements.
