TRANSMIT SOFTWARE SOFTWARE

TRANSMIT SOFTWARE SOFTWARE

Using this program provided by the invention, as each channel of a DMA controller can support not only the DMA operation of the hardware request but also the DMA operation launched by the CPU, therefore being able to come true the reuse of the hardware / software to the DMA controller. The invention discloses a DMA controller and its transmission method, achieving the reuse of a hardware / software DMA controller includes control modules for receiving DMA transfer requests of the hardware and determining whether the hardware request can be run If possible it can be referred that the DMA transmission launched by the hardware Also used in providing the information of transmission resources to the CPU when the CPU needs to issue a request of DMA transmission After receiving DMA transmission request of the CPU, operating DMA transmission by the use of the idle transmission resources chosen by the CPU, and the transmission also stopping the process of the hardware request of the transmission resources until the end or termination of DMA transmission initiated by the CPU. 208000008425 Protein Deficiency Diseases 0.000 description 1.230000001276 controlling effects Effects 0.000 claims description 3.230000000977 initiatory Effects 0.000 claims description 5.230000000875 corresponding Effects 0.000 claims description 9.230000004301 light adaptation Effects 0.000 claims description 18.230000014509 gene expression Effects 0.000 claims description 39.230000005540 biological transmission Effects 0.000 claims abstract description 275.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Vimicro Corp filed Critical Vimicro Corp Priority to CNB2007100986701A priority Critical patent/CN100481045C/en Publication of CN101034383A publication Critical patent/CN101034383A/en Application granted granted Critical Publication of CN100481045C publication Critical patent/CN100481045C/en Status Expired - Fee Related legal-status Critical Current Anticipated expiration legal-status Critical Links Original Assignee Vimicro Corp Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor й‚№жќЁ Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number CNB2007100986701A Other languages Chinese ( zh) Google Patents CN100481045C - DMA controller and transmit method for implementing software/hardware reusing CN100481045C - DMA controller and transmit method for implementing software/hardware reusing

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