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200-570-000-014 Relay Card

200-570-000-014 Relay Card

200-570-000-014 Relay Card

freertos是一個(gè)輕量級(jí)的rtos，它現(xiàn)在完畢了一個(gè)微內(nèi)核，而且port到arm7,  pic18, coldfire等許多處理器上；現(xiàn)在已經(jīng)在rtos的市場(chǎng)上占有不少的比例。它當(dāng)然不是一個(gè)與vxworks之類的rtos比賽的操作系統(tǒng)，它的方針在 于低功用小RAM的處理器上。整個(gè)系統(tǒng)只需3個(gè)文件，外加上port的和處理器相關(guān)的兩個(gè)文件，完畢是很簡練的。

與ucosii不同，它是free的，ucosii不是free的，盡管它的代碼是拆穿的。FreeRTOS供給的功用包括：任務(wù)處理、時(shí)刻處理、信號(hào)量、音訊隊(duì)伍、內(nèi)存處理。FreeRTOS內(nèi)核支撐優(yōu)先級(jí)調(diào)度算法，每個(gè)任務(wù)可根據(jù)重要程度的不同被賦予必定的優(yōu)先級(jí)，CPU總是讓處于組織保險(xiǎn)態(tài)的、 優(yōu)先級(jí)高的任務(wù)先作業(yè)。FreeRT0S內(nèi)核一同支撐輪換調(diào)度算法，系統(tǒng)容許不同的任務(wù)運(yùn)用相同的優(yōu)先級(jí)，在沒有更高優(yōu)先級(jí)任務(wù)組織保險(xiǎn)的情況下，同一優(yōu)先級(jí)的任務(wù)同享CPU的運(yùn)用時(shí)刻。這一點(diǎn)是和ucosii不同的。

其他一點(diǎn)不同是freertos既可以配備為可搶占內(nèi)核也可以配備為不可搶占內(nèi)核。當(dāng)FreeRTOS被設(shè)置為可掠取型內(nèi)核時(shí)，處于組織保險(xiǎn)態(tài)的高優(yōu)先級(jí)任務(wù)能掠取低優(yōu)先級(jí)任務(wù)的CPU運(yùn)用權(quán)，這樣可保證系統(tǒng)滿意實(shí)時(shí)性的要求；當(dāng)FreeRTOS被設(shè)置為不可掠取型內(nèi)核時(shí)，處于組織保險(xiǎn)態(tài)的高優(yōu)先級(jí)任務(wù)只需等當(dāng)時(shí)作業(yè)任務(wù)主動(dòng)開釋CPU的運(yùn)用權(quán)后才調(diào)取得作業(yè)，這 樣可進(jìn)步CPU的作業(yè)功率。

CMC16 VIBRO METER

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VIBRO METER CMC16 (Used, Cleaned, Tested 2 year warranty)

VIBRO METER CMC16 (Used, Cleaned, Tested 2 year warranty)

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VIBRO METER VM600-CSA (Used, Cleaned, Tested 2 year warranty)

VIBRO METER VM600-CSA (Used, Cleaned, Tested 2 year warranty)

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204-100-000-012/5/1/0/1/3 VIBRO METER 20410000001251013 VIBRATION MONITOR VMU100

204-100-000-012/5/1/0/1/3 VIBRO METER 20410000001251013 VIBRATION MONITOR VMU100

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VIBRO-METER 204-100-000-011 VIBROSMART VIBRATION MONITOR VMU 100 D596284

VIBRO-METER 204-100-000-011 VIBROSMART VIBRATION MONITOR VMU 100 D596284

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VIBRO-METER 204-100-000-011/2/1/0/0/1 VIBROSMART MONITOR VMU 100 D602527

VIBRO-METER 204-100-000-011/2/1/0/0/1 VIBROSMART MONITOR VMU 100 D602527

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VIBRO METER IOC16T (Used, Cleaned, Tested 2 year warranty)

VIBRO METER IOC16T (Used, Cleaned, Tested 2 year warranty)

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VIBRO METER RPS-6U (Surplus New not in factory packaging)

VIBRO METER RPS-6U (Surplus New not in factory packaging)

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