Communications device, method for communications control, and printer comprising this communications device
First Claim
1. A communications device comprising:
- a communications buffer connected by a USB bus to a host device, and configuring an endpoint of a USB connection; and
a control unit, wherein the communications buffer comprises a receive buffer for storing receive data, and the control unit varies a receive buffer size of the receive buffer in which the communications buffer stores the receive data, based on an instruction sent through USB virtual serial communication from the host device side.
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Accused Products
Abstract
A communications buffer and control unit that configure a USB connection endpoint are provided connected by a USB bus to a host device. The control unit changes the receive buffer size of a receive buffer where the communications buffer stores receive data, based on an instruction that is sent from the host device side through USB virtual serial communication, to enable the reception of real-time execution commands by the communications device. This enables the reception of real-time execution commands when the receive buffer on the communications device side is in a buffer-full state in data communications between a host device and a communications device.
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Citations
17 Claims
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1. A communications device comprising:
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a communications buffer connected by a USB bus to a host device, and configuring an endpoint of a USB connection; and
a control unit, wherein the communications buffer comprises a receive buffer for storing receive data, and the control unit varies a receive buffer size of the receive buffer in which the communications buffer stores the receive data, based on an instruction sent through USB virtual serial communication from the host device side. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 17)
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10. A method of communications control in communications through USB virtual serial communication between a host device and a communications device that are connected with USB connection, wherein
a receive buffer size of a receive buffer that stores receive data of a communications buffer provided in the communications device changes, based on instructions sent from the host device side through USB virtual serial communication.
Specification