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應(yīng)用于導(dǎo)航SoC的專(zhuān)用DMA的設(shè)計(jì)
2021年電子技術(shù)應(yīng)用第3期
秦 爽1,,2,,李 健1,楊 穎1,,陳 杰1
1.中國(guó)科學(xué)院微電子研究所,,北京100029;2.中國(guó)科學(xué)院大學(xué),,北京100049
摘要: 衛(wèi)星導(dǎo)航技術(shù)以及社會(huì)的快速發(fā)展使得高精度定位的需求越來(lái)越大,。隨著導(dǎo)航系統(tǒng)和頻點(diǎn)的增加,,導(dǎo)航模塊中需要處理的數(shù)據(jù)量越來(lái)越大。通用DMA(Direct Memory Access)控制器無(wú)法完成大量通道的傳輸,,采用中央處理器(CPU)傳輸需要占用CPU大量的時(shí)間,。應(yīng)用于導(dǎo)航片上系統(tǒng)(SoC)的專(zhuān)用DMA支持全系統(tǒng)全頻點(diǎn)的導(dǎo)航通道的數(shù)據(jù)搬移,經(jīng)過(guò)測(cè)試驗(yàn)證,,DMA搬移相同通道數(shù)的數(shù)據(jù)所需要的時(shí)鐘周期為CPU的三分之一,,有效提高了CPU的效率。在設(shè)計(jì)中采用了低功耗優(yōu)化技術(shù),,優(yōu)化后DMA模塊動(dòng)態(tài)功耗降低至原來(lái)的15%,。
關(guān)鍵詞: 導(dǎo)航 SOC DMA
中圖分類(lèi)號(hào): TN492
文獻(xiàn)標(biāo)識(shí)碼: A
DOI:10.16157/j.issn.0258-7998.200909
中文引用格式: 秦爽,李健,,楊穎,,等. 應(yīng)用于導(dǎo)航SoC的專(zhuān)用DMA的設(shè)計(jì)[J].電子技術(shù)應(yīng)用,2021,,47(3):27-30.
英文引用格式: Qin Shuang,,Li Jian,Yang Ying,,et al. Design of dedicated DMA applied to navigation SoC[J]. Application of Electronic Technique,,2021,47(3):27-30.
Design of dedicated DMA applied to navigation SoC
Qin Shuang1,,2,,Li Jian1,Yang Ying1,,Chen Jie1
1.Institute of Microelectronics of the Chinese Academy of Sciences,,Beijing 100029,,China,; 2.University of Chinese Academy of Sciences,Beijing 100049,,China
Abstract: The rapid development of satellite navigation technology and society has made the demand for high-precision positioning increasingly large. With the increase of navigation systems and frequency points, the amount of data that needs to be processed in the navigation module is increasing. The general DMA(Direct Memory Access)controller cannot complete the transmission of a large number of channels, and the transmission using the CPU requires a lot of CPU time. The dedicated DMA applied to the navigation system on chip(SoC) supports the data movement of the navigation channel of the whole system and the whole frequency point. After testing and verification, the clock cycle required by the DMA to move the same channel number of data is one-third of the CPU One, effectively improving the efficiency of the CPU. Low-power optimization technology is used in the design, after optimization, the dynamic power consumption of the DMA module is reduced to 15% of the original.
Key words : navigation,;SoC;DMA

0 引言

    隨著社會(huì)的發(fā)展,,衛(wèi)星導(dǎo)航已經(jīng)廣泛應(yīng)用到人類(lèi)社會(huì)的很多方面,,如無(wú)人機(jī)、物聯(lián)網(wǎng),、車(chē)輛導(dǎo)航以及物流等[1],,對(duì)導(dǎo)航定位的精度要求也越來(lái)越高。目前的導(dǎo)航SoC主要采用CPU來(lái)完成導(dǎo)航模塊的數(shù)據(jù)搬移工作,,隨著導(dǎo)航系統(tǒng)和頻點(diǎn)的增加,,搬移大量導(dǎo)航通道的數(shù)據(jù)將占用CPU大量的時(shí)間,。而且CPU頻繁地輪詢(xún)檢測(cè)各個(gè)通道的狀態(tài)將使CPU的低功耗設(shè)計(jì)變得極為復(fù)雜。梁科等人設(shè)計(jì)了一款通用DMA,,該DMA能有效提高數(shù)據(jù)傳輸效率,,但是它最多支持8個(gè)通道,無(wú)法滿足導(dǎo)航應(yīng)用要求[2],。張路煜等人設(shè)計(jì)的DMA使用了專(zhuān)用數(shù)據(jù)通路,,雖然避開(kāi)了AHB總線,能進(jìn)行多路并行傳輸,,但是會(huì)使SoC內(nèi)部時(shí)序復(fù)雜[3],。本文設(shè)計(jì)了一種專(zhuān)用于導(dǎo)航SoC的DMA,它能高效的完成大量通道的數(shù)據(jù)搬移[4-11],。




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作者信息:

秦  爽1,,2,李  健1,,楊  穎1,,陳  杰1

(1.中國(guó)科學(xué)院微電子研究所,北京100029,;2.中國(guó)科學(xué)院大學(xué),,北京100049)

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