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    • 6. 发明授权
    • Controlling packet length for transfer between devices
    • 控制数据包长度以便在设备之间进行传输
    • US07106463B1
    • 2006-09-12
    • US09612571
    • 2000-07-07
    • Hideyuki Makitani
    • Hideyuki Makitani
    • G06F15/00G06K1/00
    • H04N1/32593H04N1/32561H04N1/33307H04N1/33376H04N2201/33342
    • An image processing system comprising a combination of an image control unit and one or a plurality of image input/output units, wherein the image control unit and image input/output unit are connected by communication means. In a case where the image control unit has a first communication controller and the image input/output unit has a second communication controller, predetermined communication conditions are set in the first and second communication controllers at initialization, a fixed packet length is decided based upon mutually communicable packet lengths of packets exchanged via the communication means, the decided fixed packet length is set in the first and second communication controllers anew, and subsequent communication is continued by DMA transfer in which a data string is divided into the set fixed packet lengths. As a result, high-speed data communication is achieved between units even in a low-cost single-chip microcontroller.
    • 一种图像处理系统,包括图像控制单元和一个或多个图像输入/输出单元的组合,其中所述图像控制单元和图像输入/输出单元通过通信装置连接。 在图像控制单元具有第一通信控制器并且图像输入/输出单元具有第二通信控制器的情况下,在初始化时在第一和第二通信控制器中设置预定的通信条件,基于相互决定固定分组长度 通过通信装置交换的分组的通信分组长度,决定的固定分组长度重新设置在第一和第二通信控制器中,并且通过DMA传输继续进行后续通信,其中数据串被分成设定的固定分组长度。 因此,即使在低成本的单片微控制器中,也可在单元之间实现高速数据通信。