Patent ID: 7869074
Filing Date: 2011-01-11
Classification: G06F

Abstract:
1. A communications system comprising: a host device; a peripheral device connected to the host device to communicate with the host device according to a main communication protocol, the main communication protocol for regulating an issue of a command in one direction from the host device to the peripheral device; wherein the host device successively issues commands to the peripheral device; the peripheral device successively executes data processing based on the commands and replies with response information corresponding to results of the data processing to the host device; the peripheral device comprises an image processing unit, a storage device storing image data to be used in the image processing unit, the image data being accessible from the host device and the image processing unit, a selection operating unit that allows a selection operation of a user for selecting the image data, and a trigger generating unit that generates a trigger according to the selection operation; the host device transmits a first command to the peripheral device, the first command for requesting the peripheral device to transmit a trigger generation report information indicating whether the trigger is generated in the peripheral device; the peripheral device transmits the response information including the trigger generation report information to the host device according to the first command; the host device judges whether the trigger is generated in the peripheral device according to the trigger generation report information and transmits a second command for requesting the peripheral device to transmit an identification information of the image data corresponding to the selection operation to the host device, when it is judged that the trigger is generated in the peripheral device; the peripheral device transmits the response information including the identification information to the host device according to the second command; the host device instructs the peripheral device to read the image data from the storage device to transmit to the host device, according to the identification information, and stores the image data in a predetermined storage area thereof.