Printing apparatus with a cash drawer control function, and a control method therefor
First Claim
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1. A printing apparatus comprising:
- a data receiver to receive command data from a host device;
a memory to store the command data received by the data receiver;
a printer controller to read out the command data stored in the memory in a first-in-first-out order and control the printing apparatus in accordance with the command data;
a command detector to directly detect predetermined command data within the command data received by the data receiver; and
an error recovery controller to enable the printing apparatus to recover from an error state in accordance with the predetermined command data detected by the command detector.
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Abstract
A printing apparatus comprises a real-time command interpreter that functions even when the printing apparatus is off-line, and interprets control commands simultaneously with receiving data. The printing apparatus can therefore output pulses to the external devices even when printing is in progress or the printer is off-line. Such printing apparatus comprises a command detector for directly detecting predetermined command data from the received command data. An external controller controls an external device in accordance with predetermined command data detected by the command detection.
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Citations
10 Claims
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1. A printing apparatus comprising:
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a data receiver to receive command data from a host device;
a memory to store the command data received by the data receiver;
a printer controller to read out the command data stored in the memory in a first-in-first-out order and control the printing apparatus in accordance with the command data;
a command detector to directly detect predetermined command data within the command data received by the data receiver; and
an error recovery controller to enable the printing apparatus to recover from an error state in accordance with the predetermined command data detected by the command detector. - View Dependent Claims (2, 3, 4, 5)
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6. A method for controlling a printing apparatus comprising the steps of:
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(a) receiving command data from a host device;
(b) storing the command data received by step (a);
(c) reading out the command data stored in step (b) in a first-in-first-out order and controlling a printing apparatus in accordance with the command data;
(d) directly detecting predetermined command data within the command data received by step (a); and
(e) enabling the printing apparatus to recover from an error state in accordance with the predetermined command data detected by step (d). - View Dependent Claims (7, 8, 9, 10)
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Specification