dma

美 [?di: em 'e?] 　英 [?di: em 'e?]

• n.直接內(nèi)存存取（全寫為 direct memory access，無須使用中央處理器）
• 網(wǎng)絡(luò)直接內(nèi)存訪問(Direct Memory Access)；直接存儲(chǔ)器存取；直接存儲(chǔ)器訪問

英漢雙解

英漢解釋

n.	1. 直接內(nèi)存訪問 2. 國防部礦產(chǎn)管理局 3. 存貯器直接存取 4. 二甲苯胺法 5. 美國國防制圖局 6. 甲胂鈉

英英解釋

abbr.

1. Doctor of Musical Arts

例句

An unrecognized error occurred while trying to register ownership of the hardware DMA channel assigned to this device .

注冊分配給這個(gè)設(shè)備的硬件DMA頻道的所有權(quán)時(shí)，出現(xiàn)了一個(gè)無法辨別的錯(cuò)誤。

As you may have guessed, most of the interesting parts of the program are taking place on the SPE, including all of the DMA transfers.

正如您所猜測的那樣，程序大多數(shù)有趣的部分都發(fā)生在SPE，包括所有的DMA傳輸。

The first copy is performed by the DMA engine, which reads file contents from the disk and stores them into a kernel address space buffer.

直接內(nèi)存存取（directmemoryaccess，DMA）引擎執(zhí)行了第一次拷貝（參見圖1），它從磁盤中讀取文件內(nèi)容，然后將它們存儲(chǔ)到一個(gè)內(nèi)核地址空間緩存區(qū)中。

The tag_id allows for you to retrieve the status of the DMA operation.

tag_id讓您可以檢索DMA操作的狀態(tài)。

In this application, you will only have one DMA command active at a time, so all of your operations will use 0 as the DMA tag.

在這個(gè)應(yīng)用程序中，一次只有一個(gè)DMA命令是激活的，所以所有的操作都將使用0作為DMA標(biāo)簽。

Dynamic mechanical analysis (DMA) and the stress-strain behavior revealed that the system is excellent low temperature toughness.

通過對增韌體系應(yīng)力應(yīng)變特性和動(dòng)態(tài)力學(xué)性能的研究表明，該體系具有優(yōu)異的低溫韌性。

Even the enhanced version of the MCS51 compatible MCU almost has no DMA ability.

即使增強(qiáng)板的MCS51相容微控制器也幾乎缺少DMA的能力。

A DMA request always involves moving data between the SPE local store and a virtual address space on the PPE side.

DMA請求通常會(huì)涉及數(shù)據(jù)在SPE本地存儲(chǔ)與PPE端虛擬地址空間之間進(jìn)行移動(dòng)。

Because DMA commands are asynchronous, it is useful to be able to wait for one to complete.

由于DMA命令是異步的，所以如能等待一個(gè)命令完成，將十分有用。

For instance, one of the problems with the original code is that it is limited to the size of a DMA transfer.

舉例來說，原來代碼的一個(gè)問題是一次DMA傳輸的大小有限制。

Direct memory access, DMA, is a method used to bypass the CPU in these transfers, thus performing them much more quickly.

直接存儲(chǔ)器訪問就是在數(shù)據(jù)傳輸中繞過CPU的一種方法，因此執(zhí)行起來速度很快。

Think of this as a specialized version of the C library function select, but for DMA transfers.

可以把它看作C庫函數(shù)select的特殊版本，但是針對的是DMA傳輸。

Therefore, they cannot be accessed directly, but must be moved in through DMA.

因而，它們不能被直接訪問，而必須通過DMA移進(jìn)來。

The DMA channel conflicts with another device in the system. Reconfigure the adapter and software to use a different DMA channel.

DMA頻道跟系統(tǒng)中的另一個(gè)設(shè)備有沖突。重新配置適配器和軟件來使用不同的DMA頻道。

You use the same DMA parameters as for the last transfer, but this time it is an MFC_PUT_CMD command.

使用相同的DMA參數(shù)作最后的傳輸，但這次使用的是MFC_PUT_CMD命令。

Independently and asynchronously, a fourth copy happens as the DMA engine passes the data from the kernel buffer to the protocol engine.

DMA引擎將數(shù)據(jù)從內(nèi)核緩沖區(qū)傳到協(xié)議引擎，第四次拷貝獨(dú)立地、異步地發(fā)生。

The sound card cannot be found with this DMA Channel . Check your settings and try again .

聲卡找不到這個(gè)端口號。請檢查設(shè)置值，然后重試。

But with DMA, which uses asynchronous transmissions, the device driver needs to wait for an explicit interrupt from the NIC.

但在DMA中，也就是用戶使用異步傳送模式，設(shè)備驅(qū)動(dòng)須要等待NIC一個(gè)清楚的中斷。

Furthermore, the dedicated DMA controllers discussed above have been verified on the Modelsim and FPGA platform.

本研究所提出的專用DMA控制器通過了在Modelsim和FPGA平臺下的驗(yàn)證。

The compiler introduces new intrinsics to do DMA transfers or other mailbox accesses, because these are not part of the C language standard.

編譯器引入了一些新的特性來實(shí)現(xiàn)DMA傳輸和其他郵箱訪問，這是因?yàn)?/c>這些并不是C語言標(biāo)準(zhǔn)的部分。

The organization of DMA system is illustrated on Fin3-39.

DMA系統(tǒng)的結(jié)構(gòu)如圖3-38所示。

Besides, the design and simulation of two main peripheral equipment of on-chip bus: WB arbiter and DMA controller was done.

本文還完成了片上總線兩個(gè)主要外圍設(shè)備：WB總線仲裁器和DMA控制器的設(shè)計(jì)和仿真驗(yàn)證工作。

It takes a tag as its only parameter, converts it to a tag mask, requests a DMA status, and then reads the status.

它接受標(biāo)簽作為惟一一個(gè)參數(shù)，將它轉(zhuǎn)換為標(biāo)簽掩碼、請求DMA狀態(tài)然后再讀取狀態(tài)。

This study attempts to characterize the damping behavior of sandwich beam by a new method with dynamic mechanical analyzer(DMA).

文中通過動(dòng)態(tài)力學(xué)分析儀DMA來表征三明治約束阻尼梁結(jié)構(gòu)損耗因子隨各種因素的變化情況。

The dynamic mechanical behavior of the cross-linked unsaturated polyester network was investigated by DMA.

用動(dòng)態(tài)力學(xué)分析（DMA）對不飽和聚酯交聯(lián)網(wǎng)絡(luò)結(jié)構(gòu)進(jìn)行了系統(tǒng)研究。

That discomfort accounts, in no small measure, for the rising popularity of so-called Direct Market Access (DMA) trading systems.

這種不爽在很大程度上導(dǎo)致了所謂的直接市場接入（DMA）交易系統(tǒng)的日漸流行。

Before getting into the details of the main program, I'll explore the DMA utility functions.

在深入介紹主程序細(xì)節(jié)之前，我要先來探討一下DMA實(shí)用函數(shù)。

The storage modulus and damping factor of composites were also characterized through dynamic mechanical analysis (DMA).

此外，采用動(dòng)態(tài)力學(xué)分析（DMA）進(jìn)一步表征了復(fù)合材料的儲(chǔ)能模量和阻尼因子。

A method and apparatus for high performance volatile disk drive (VDD) memory access using an integrated direct memory access (DMA) engine.

一種方法和裝置，用于使用集成直接存儲(chǔ)器訪問（DMA）引擎進(jìn)行高性能易失性磁盤驅(qū)動(dòng)器（VDD）存儲(chǔ)器訪問。

DMA channels that are assigned to the same priority level are handled in a round-robin manner.

被指定給相同的優(yōu)先水平的直接內(nèi)存存取通道以回合-知更鳥的樣子被處理。

While DMA to and from the SPE is adequate for moving blocks of data, there's often a need for the ability to send smaller messages faster.

盡管對于向SPE中傳遞數(shù)據(jù)或從SPE中讀取數(shù)據(jù)來說，DMA已經(jīng)足以用來移動(dòng)數(shù)據(jù)了，但是通常會(huì)需要具有可以快速發(fā)送更小的消息的能力。

The DMA engine passes data directly from the kernel buffer to the protocol engine, thus eliminating the remaining final CPU copy.

DMA引擎直接把數(shù)據(jù)從內(nèi)核緩沖區(qū)傳輸到協(xié)議引擎，從而消除了剩下的最后一次CPU拷貝。

These all need to be quadword aligned, so that you can copy it into your main program and use the values with DMA transfers.

而且它們都是按四字節(jié)對齊的以便能夠將其復(fù)制進(jìn)您的主程序并在DMA傳輸時(shí)使用值。

Whether it's an argument passed in or an address gotten some other way, the DMA targets must be aligned on cache lines (16 bytes).

不管是傳入的參數(shù)還是通過其他方式獲得的地址，DMA的目標(biāo)地址必須要與緩存線路（16字節(jié)）進(jìn)行對齊。

The results demonstrated that PECH-DMA could greatly enhance the removal efficiency of NTU and organic substances.

結(jié)果表明：助凝效果明顯，濁度和有機(jī)物的去除效果都得到明顯提高。

This will be important as you learn how to use the memory flow controller's DMA facilities.

對于學(xué)習(xí)如何使用內(nèi)存流控制器的DMA工具而言，理解這些概念將會(huì)十分重要。

Graphics commands to the processor were queued to a shared DMA buffer.

給處理器的圖形命令被放到一個(gè)共享的DMA緩沖中并排隊(duì)。

An MFC can have multiple concurrent DMA requests to one address space outstanding from both the PPE and the SPU.

MFC可以具有對同一個(gè)地址空間的多個(gè)并發(fā)的DMA請求，這些請求可以來自于PPE和SPU。

In the article, we introduce each module of DMA controller custom logic including the interface and the state machine.

本文很詳細(xì)地介紹了DMA控制用戶邏輯的各個(gè)模塊，包括其接口和狀態(tài)機(jī)。

Once a data access request is detected, a VDD driver may issue a DMA data request to perform the data access request from the VDD.

一旦檢測到數(shù)據(jù)訪問請求，VDD驅(qū)動(dòng)器可以發(fā)出DMA數(shù)據(jù)請求以執(zhí)行來自VDD的數(shù)據(jù)訪問請求。

This command causes the SPE to immediately return with the status of the DMA channels.

這個(gè)命令會(huì)導(dǎo)致SPE立即返回DMA通道的狀態(tài)。