DSQC431

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描述

DSQC431

?XMOS公司的xCORE架構(gòu)MCU是一種全新理念的32位MCU,它用軟件IP的方式實現(xiàn)了傳統(tǒng)MCU的硬件外設,可以靈活地實現(xiàn)不同數(shù)量的外圍接口。同時,xCORE架構(gòu)極大地提升了外部事件響應速度。XMOS最新的CORE-XA芯片架構(gòu),通過集成低功耗ARMCortex-M3內(nèi)核,更是能夠覆蓋對功耗敏感的更廣闊的市場應用。
? ? xCORE架構(gòu)MCU的特點
? ? XMOS公司企業(yè)傳播總監(jiān)AndyGothard介紹說,xCORE架構(gòu)MCU使用戶能夠用簡單的代碼實現(xiàn)類似SoC的芯片。傳統(tǒng)的MCU外設(如UART、以太網(wǎng)、USB、SPI、CAN總線等)固定,不能更改,xCORE可以通過軟件調(diào)用IP的方法,實現(xiàn)不同數(shù)量的串口和以太網(wǎng)等接口,使用戶可以根據(jù)需求進行變更。
? ? xCORE技術(shù)由英國Bristol大學的教授研發(fā),它將芯片里同一個內(nèi)存單元分開成邏輯上不同的核,執(zhí)行并行運算。統(tǒng)一的CPU處理中心分出的多個邏輯核擁有各自獨立的系統(tǒng),能夠并行處理外部事件,所有外設都能通過內(nèi)核實現(xiàn)。
? ? 傳統(tǒng)MCU的累加器通過總線與外設進行通信,其優(yōu)點是外設可以直接使用,但是存在著中斷和總線競爭。另外,累加器取指令要經(jīng)過流水線和緩存,使得實時性變差。如果外部事件較多,MCU在處理完某個I/O口輸入,再從另一個I/O口輸出,其上升沿將會有很大抖動。xCORE架構(gòu)拋開傳統(tǒng)的MCU架構(gòu),沒有緩存、中斷和流水線,而是并行執(zhí)行,可以預測所有事件的執(zhí)行。因此,xCORE極大地提升了外部事件響應速度,無論有多少外部事件發(fā)生,其輸出的抖動都非常小。
? ? xTIME調(diào)度中心在硬件上實現(xiàn)了實時操作系統(tǒng)。xCORE實現(xiàn)了實時操作系統(tǒng)的任務處理,硬件響應端口是實時性的I/O,能夠很大程度減輕內(nèi)部xCORE的負擔,完成不需要其執(zhí)行的任務。要實現(xiàn)以太網(wǎng)、USB、UART等接口,不需要增加硬件實現(xiàn),而是采用軟件實現(xiàn)硬件功能。并且,每條指令都是單周期指令,可以用工具預測出運行任務所需要的時間。
? ? 在軟件開發(fā)方面,AndyGothard指出,xCOREMCU采用C或C++進行開發(fā),而FPGA開發(fā)需要編寫硬件描述語言。在中國,采用C或C++編程的工程師要比采用HDL或Verilog的工程師多,這樣更方便工程師運用,再加上XMOS工具簡單易用,產(chǎn)品非常容易上手。
? ? xCORE架構(gòu)MCU的應用案例
? ? xCOREMCU的性能與中低端FPGA接近,但是其功耗和售價比FPGA低很多。與傳統(tǒng)MCU相比,其價格相差不大,但其性能是32位通用MCU的十倍。Meridian公司早期Hi-Fi音頻產(chǎn)品采用MCU、DSP、FPGA以及一些接口芯片設計,這樣需要用多個工具設計,并且電路板會做得很大。后來,該公司采用一顆xCOREMCU替代了早期采用多顆芯片的做法。一顆芯片就實現(xiàn)了所有功能,并且它的性能更好,電路板更小,開發(fā)工具也只需要一套。
? ? SONYWalkman耳機放大器PHA2是xCOREMCU的另一個案例。它不經(jīng)過手機內(nèi)部的CODEC(最多48kHz采樣率)處理,而是通過USB口與手機相連,可以192kHz的采樣率還原真實聲音。這對MCU的要求非常高,需要準確地還原聲音的每個細節(jié),對處理速度、響應性能要求非常高。xCORE就非常適合這類應用。另外,激光切割機采用一顆xCOREMCU就實現(xiàn)了對六個電機高速、精確的同步控制。

產(chǎn)品承諾:
保?證?全新原裝進口,
保?證?安全準時發(fā)貨,
保?證售后服務質(zhì)量,
優(yōu)勢價格,大量現(xiàn)貨。

主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA
? 專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實力庫存商家

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專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊

PLC模塊,可編程控制器,CPU模塊,IO模塊,AI模塊,通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅

15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實力庫存商家


選擇深圳長欣,選擇放心,售后無憂大量現(xiàn)貨,當天順豐發(fā)貨!
主營:本特利,英維思,伍德沃德,??怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機器人系統(tǒng)配件,大型伺服系統(tǒng)備件。

先介紹幾點經(jīng)驗。
1、先通讀一遍“系統(tǒng)手冊”(不管能不能看懂,先了解個大概,以便學習編程時查找);
2、由位控邏輯入手,逐漸增加定時、計數(shù)等條件,把或、與、非關(guān)系理順;
3、進而練習整數(shù)運算、實數(shù)運算、類型轉(zhuǎn)換;
4、量程轉(zhuǎn)換、PID調(diào)節(jié)回路的建立及P、I、D參數(shù)的理解(最好是有個物理回路驗證,比如變頻器+電機+測速傳感器);
5、循環(huán)、順序、跳轉(zhuǎn)等程序控制(盡量避免跳轉(zhuǎn),非跳不可時也是跳的越近越好);
6、中斷、通訊、位置控制....

本人以ABB工業(yè)機器人配件DSQC系列和Motorola MVME系列,GE 卡件 模塊 驅(qū)動器系列為主攻。各位電工朋友可根據(jù)自己的條件選擇適合自己的PLC品牌,由于PLC的基本框架大同小異,學會一種至于其它的學習起來也就簡單了。