6AV6643-0BA01-1AX0

6AV6643-0BA01-1AX0

微處理器SAB-C167CR的數(shù)據(jù)處理速度可達(dá)10 MHz，能完成所有測(cè)量、控制及通信等功能，其特點(diǎn)是任務(wù)較多，各任務(wù)之間協(xié)調(diào)較為復(fù)雜，為了便于個(gè)任務(wù)之間協(xié)調(diào)與功能擴(kuò)充，CPU軟件系統(tǒng)采用了實(shí)時(shí)多任務(wù)操作系統(tǒng)RTOS來優(yōu)化和分配CPU時(shí)序和資源，保證程序的實(shí)時(shí)性和可靠性，以任務(wù)為對(duì)象進(jìn)行資源管理，任務(wù)調(diào)度和異常處理，通過RTOS管理系統(tǒng)根據(jù)數(shù)據(jù)處理的輕重緩急來合理分配占有CPU，優(yōu)化時(shí)序分時(shí)執(zhí)行，使之不閑置，不擁擠，每個(gè)處理過程又有多個(gè)不同優(yōu)先級(jí)別的任務(wù)組成，采用優(yōu)先搶占操作方式有效保證任務(wù)執(zhí)行的實(shí)時(shí)性，采用這一軟件結(jié)構(gòu)的突出特點(diǎn)是使程序?qū)崿F(xiàn)了真正的模塊化，各個(gè)任務(wù)單獨(dú)編程，不受其他任務(wù)的影響，任務(wù)的增減，調(diào)度非常方便。

軟件設(shè)計(jì)分為兩部分：一部分是SAB-C167CR微處理器的軟件設(shè)計(jì)，包括與間隔層設(shè)備間CAN總線數(shù)據(jù)傳輸及上位機(jī)UBS的數(shù)據(jù)通信（使用USB接口方便現(xiàn)場，即插即用，便于PC機(jī)的維護(hù)與升級(jí)，滿足變電站數(shù)據(jù)通信的需要）；另一部分為PC機(jī)上位機(jī)軟件的設(shè)計(jì)。這部分上位機(jī)軟件設(shè)計(jì)較為復(fù)雜，若采用面向?qū)ο蟮恼Z言編寫程序，可使用ActiveX控制實(shí)現(xiàn)數(shù)據(jù)通信。對(duì)于微處理器和上位機(jī)的軟件設(shè)計(jì)，考慮到將來間隔層設(shè)備結(jié)構(gòu)的變化和硬件升級(jí)需要，程序設(shè)計(jì)分為兩層，底層負(fù)責(zé)數(shù)據(jù)接收和發(fā)送；上層負(fù)責(zé)數(shù)據(jù)幀上午打包、解包及協(xié)議的解釋。

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