JPH0381820A - Printing data edition system - Google Patents

Abstract

PURPOSE:To easily resend data from a high order device when a data error occurs by providing the printing data edition system with a format storing register whose contents are instantaneously updated at the time of receiving data and a format storage register whose contents are updated after ending data edition. CONSTITUTION:Received data are sent from the high order device 1 to a buffer 2 and whether the received data is a data error or not is checked by an error detection part 3. In the case of a data error, a data error signal is turned on, the data error is informed to the device 1 and a printing data edition part 4 and the format storage register 10 to be instantaneously updated at the time of receiving data is cleared. When the received data is not the data error but a printing start code, a printing start code detection pat 5 turns on a reception disable signal 9 to request the stop of transmission to the device 1. The edition part 4 outputs printing data are cleared, only the part corresponding to the newly set part of the register 10 are updated in the format storage register 11. Then a reception enable signal 8 is turned on to receive the succeeding printing line.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a typeface serial printer, and more particularly to a print data editing method.

[Conventional technology]

Conventionally, this type of print data editing has had one format storage register, and the content of the register has been used to specify the horizontal feed amount of the carriage after printing, the feed amount of the paper, the feed amount of the ink ribbon, and the print color. .

[Problem to be solved by the invention]

In the conventional print data editing described above, one format storage register determines the horizontal feed of the carriage after printing, the amount of paper feed, the amount of ink ribbon feed, the color of print, etc. Therefore, when a data error such as a parity error occurs, even if the host device wants to resend the row or column where the error occurred in order to increase the reliability of the data, If there is data to change the format, the first data that is retransmitted will be printed in the changed format, and to avoid this phenomenon, initializing the format memory register will restore normality before the error occurred. There was a drawback that even the format set by the received data was cleared.

[Means to solve the problem]

The print data editing method of the typeface serial printer of the present invention consists of a receiving buffer that receives print data from a host device, a data error detection section that detects data errors in the received data and notifies the host device, and a line feed code from the received data. A print start code detection unit detects a print start code such as and notifies the host device of whether the printer is ready or unable to receive data, a print data editing unit takes out received data from the receive buffer and edits the print data, and the print data is updated by the received data. The print data editing section has a format storage register that is updated after editing of data for one line is completed.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention. As shown in this block diagram, one embodiment of the present invention is a host device 1.
, reception buffer 2, data error detection section 3, print data editing section 4, print start code detection section 5, pig error signal 6, data bus 7, receivable signal 8, unreceivable signal 9, updated immediately upon data reception. It is composed of a format storage register 10 that is updated after editing the print data, a format storage register 11 that is updated after editing of print data, print data 12 after editing, and a print mechanism control section 13.

The operation of this embodiment will be explained with reference to FIG. Received data from the host device 1 enters the reception buffer 2. The data that has entered the reception buffer 2 is checked by the data error detection section 3, and if there is a data error, the data error signal 6 is turned ON and is notified to the host device 1 and the print data editing section 4, which are updated immediately upon receiving the data. Clear the format storage register 10. If the data is normal, the print start code detection section 5 checks the data, and if it is not a print start code, the print data editing section 4 checks the format change data. Here, if it is format change data, the format storage and the contents of the register 10 are updated. If the data is not format change data, the data is edited by the print data editing section 4 as print data. If the received data is a print start code, the print start code detection unit 5 sends a reception impossible signal 9 to the ONL host device 1. request to stop sending. Then, the print data editing section 4 sequentially outputs the print data 12 to the printing mechanism control section 13. This operation continues until the edited data becomes empty, and when it becomes empty, the print data is updated after editing is completed. The format storage register 11 is updated only in the portion corresponding to the newly set portion of the format storage register 10. After that, the receivable signal is ONL, and the next print line can be received.

〔Effect of the invention〕

As explained above, the present invention has two registers: a format storage register that is updated immediately when data is received, and a format storage register that is updated after editing the print data.
This has the effect that when a data error occurs, the host device can easily retransmit data.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a flowchart showing the operation of this embodiment. DESCRIPTION OF SYMBOLS 1... Upper device, 2... Reception buffer, 3... Data error detection part, 4... Print data editing part, 5...
・Print start code detection unit, 6...data error signal,
7...Data bus, 8...Receivable signal, 9...Receive not possible signal, 10...Format storage register updated immediately upon data reception, 11...Updated after print data editing is completed. Format storage register, 12... Edited print data, 13... Printing mechanism control unit.

Claims (1)

[Claims] A reception buffer that receives print data from the host device, a data error detection section that detects data errors in the received data and notifies the host device of the error, and a data error detection section that detects print start codes such as line feed codes from the received data and sends the printer to the host device. A print start code detection unit that informs whether reception is possible or not possible, a print data editing unit that takes out received data from the reception buffer and edits the print data, a format storage register that is updated with the received data, and a data editing unit that generates data for one line. A print data editing method for a typeface serial printer having a format storage register that is updated after editing is completed.