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Method, controller and system for transmitting signal from usb master device to cpu

A master device and controller technology, applied in the field of signal transmission, which can solve the problem that the signal cannot be transmitted to the CPU, etc.

Active Publication Date: 2017-04-19
QINGDAO GOERTEK
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The present invention provides a method, a controller and a system for transmitting a signal from a USB master device to a CPU to solve the problem that the signal cannot be transmitted to the CPU through the USB master device of the host

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  • Method, controller and system for transmitting signal from usb master device to cpu
  • Method, controller and system for transmitting signal from usb master device to cpu
  • Method, controller and system for transmitting signal from usb master device to cpu

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0039] The core idea of ​​the present invention is, because the CPU that processes audio signal and video signal includes USB master device and MMC master device, the host computer of source of audio signal has USB master device function, can't direct communication between USB two master devices. Considering that the transmission mode of the MMC is bidirectional transmission, that is, signals can be directly transmitted bidirectionally between the MMC slave device and the MMC master device. Therefore, the present invention utilizes a controller that can be used as USB from equipment and MMC from equipment, the signal of USB protocol format is converted into the signal of MMC protocol format, and the signal of this MMC protocol format is...

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Abstract

The invention discloses a method, a controller and a system for transmitting signals from USB main equipment to CPU. The method comprises the steps that the signals which are of the USB protocol format and transmitted from the USB main equipment are received by means of USB secondary equipment; the signals which are of the USB protocol format, and received by the USB secondary equipment are converted into signals of the MMC protocol format; the signals of the MMC protocol format are transmitted to the CPU integrating MMC main equipment by means of an MMC. According to the method, the controller and the system, the signals of the USB protocol format are converted into the signals of the MMC protocol format by means of the controller integrating the USB secondary equipment, MMC secondary equipment and a signal converting module, and the function of transmitting the audio signals from the USB main equipment to the CPU is achieved.

Description

technical field [0001] The invention relates to the field of signal transmission, in particular to a method, a controller and a system for transmitting a signal from a USB master device to a CPU. Background technique [0002] When developing a display product, the CPU is often used to process video and audio signals. In order to adapt to the Universal Serial Bus (USB) interface commonly used by hosts in the industry, the common practice is that the host transmits video signals through a High Definition Multimedia Interface (HDMI) and transmits audio signals through a USB interface. Because the USB transmission method is that signals can only be sent from the USB master device to the USB slave device, the USB slave device cannot directly send signals to the USB master device. The CPU is used as the USB master device, and the host is also the USB master device, so the two USB master devices cannot communicate directly, and the signal cannot be transmitted to the CPU through t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/42
Inventor 李树鹏王飞张超
Owner QINGDAO GOERTEK
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