Signal processing apparatus of a printer utilizing interruption signals
First Claim
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1. A signal processing apparatus of a printer, comprising:
- a memory for storing a plurality of programs to be executed successively at predetermined timings;
interruption signal generating means for generating an interruption signal at predetermined timings;
a single counter for counting the number of occurrences of the interruption signals at the predetermined timings from a start of transferring a print medium within the printer to at least a start of ejecting the print medium from the printer;
an event table for storing a head memory address of each of said plurality of programs stored in said memory, and for storing a plurality of count values, each count value representing a number of occurrences of interruption signals, and each count value corresponding to a head memory address of one of said plurality of programs; and
a microprocessor for reading a head memory address stored in said event table each time the number of occurrences of the interruption signal counted by said counter equals a count value stored in said event table, and for executing one of said plurality of programs stored in said memory according to the read head memory address.
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Abstract
An LED printer 21, after power-on, take steps a1 to a6 for preparation and then steps a7 to a9 for printing operation, as shown in FIG. 28. In controlling the printing operation at step a9, the temperature of a fixing unit 46 is detected by a thermistor or the like. Collection of these various data is accomplished by providing a step for counting the number of executions of the operation in the operation executed every one-millisecond and by converting the number of executions thus counted into an elapsed time. The configuration of the processing apparatus is thereby remarkably reduced in size.
21 Citations
3 Claims
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1. A signal processing apparatus of a printer, comprising:
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a memory for storing a plurality of programs to be executed successively at predetermined timings; interruption signal generating means for generating an interruption signal at predetermined timings; a single counter for counting the number of occurrences of the interruption signals at the predetermined timings from a start of transferring a print medium within the printer to at least a start of ejecting the print medium from the printer; an event table for storing a head memory address of each of said plurality of programs stored in said memory, and for storing a plurality of count values, each count value representing a number of occurrences of interruption signals, and each count value corresponding to a head memory address of one of said plurality of programs; and a microprocessor for reading a head memory address stored in said event table each time the number of occurrences of the interruption signal counted by said counter equals a count value stored in said event table, and for executing one of said plurality of programs stored in said memory according to the read head memory address. - View Dependent Claims (2, 3)
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Specification
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Current AssigneeStar Micronics Company Limited
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Original AssigneeStar Micronics Company Limited
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InventorsMaehara, Makoto, Nagata, Tomishi
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Primary Examiner(s)Moore, David K.
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Assistant Examiner(s)Garcia, Gabriel I.
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Application NumberUS08/748,718Time in Patent Office530 DaysField of Search395/101, 395/106, 395/111, 395/112, 395/113, 395/114, 395/325, 395/376, 395/733, 395/734, 395/735, 395/551, 395/553, 395/556, 395/557, 358/437, 711/206, 711/217, 711/218, 711/221, 364/736.5, 364/737, 399/9, 399/18, 399/19, 399/30, 399/76US Class Current358/1.14CPC Class CodesG03G 15/50 Machine control of apparatu...
