JPS62152040A - Data transfer system for serial printer - Google Patents

Abstract

PURPOSE:To increase printing speed by detecting early the printing position and transmitting the print positioning data while the data preceding by a line are printed. CONSTITUTION:The print data on the 1st line given from a processor 1 is sent to the 1st buffer 7 of a buffer part 3 and then sent immediately to the 2nd buffer 8 owing to an idle state of the buffer 7. Then the idle buffer 7 requests the data on the 2nd line to the processor 1 and receives it from the processor 1. The data on the 1st line are sent to a serial printer 4 from the buffer 8 to perform a seeking action and starts a printing action when the printing position is decided. Meanwhile the number of characters to be printed on the 2nd line are counted by a seek data detecting part 5 by means of the data on the 2nd line of the buffer 7. Thus the seek data are detected and written to the end of the print data on the 1st line of the buffer 8 via a seek data writing part 6. These actions are repeated to write the data on the following lines in parallel to the buffer 8 during a printing operation. Thus the serial printing actions are carried out with no interruption and therefore the printing speed is increased substantially.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a data transfer method for a serial printer that serially transfers data to a printer, and particularly relates to a method for increasing printing speed.

[Prior art] Conventionally, the data transfer method for this type of serial printer was
After receiving the data, the printing position is determined based on the number of prints on that line, a seek operation is performed, and after the seek operation is completed, the printing operation is performed.

"Problems to be Solved by the Invention" In the data transfer method of the conventional serial printer described above, seek operation and printing operation are performed after receiving data, so the time required to transfer data from the processing device to the printer and the printer As for the time it takes to start a seek operation after receiving data.

Since the printer was not working, I focused on the maximum performance of the printer and did not turn it off.

1. Means for Solving Problem 1" This invention relates to a data transfer method for a serial printer in which data is serially transferred from a processing device to a print link for printing. Control is performed by an interface control section, and data sent from the processing device via the interface control section is temporarily stored in a buffer section and then supplied to the printer.

Seek data for determining the print position based on the data in the buffer section No. 7 is detected by the seek data detection section, and the seek data is written into the buffer section by the seek data writing section.

With this configuration, the printer can detect seek data for data to be printed on the next line during a printing operation, and can print at high speed.

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

FIG. 1 shows an embodiment of the invention. Normally, data generated by the processing device 1 is sent to the buffer section 3 via the cover control section 2 and printed by the serial printer 4. In this data transfer, the number of prints in one line is counted by the seek data detection unit 5 using the data of one line stored in the two-buffer unit 3, and seek data for determining the print position 1;゛t is detected.

This seek data is written into the buffer section 3 by the seek data writing section 6. The serial printer 4 repeats a seek operation and a print operation based on the data sent from the buffer section 3.

Next, the operation of the data transfer system of the present invention will be explained with reference to the time chart of FIG.

First line print data DATA(1) from processing device l
is sent to the first buffer 7, and since the second buffer 8 is empty, the data is sent to the second buffer 8 immediately.

Since the first buffer 7 becomes empty immediately, the second line print data DATA(2)Y is requested to the processing device 1, and the data is received. First line print data DATA (
1) is sent from the second buffer 8 to the serial printer 4, a seek operation is performed, and when the printing position is determined, the printing operation begins. During this operation, $22nd line seek data T A
B (2) To generate Y, the second buffer of the first buffer 7
Using the print data DATA (2) a' in the row, the number of prints in the second row is counted by the seek data detection section 5 to detect the seek data T A B (2), which is sent to the seek data writing section 6. The data is written after the print data DATA(1) of the first line of the second buffer 8 is written via the buffer 8.

The serial printer 4 prints the first line of print data DATA (
1) & When all are printed, the second line seek operation begins with the second line seek data T A B (2) sent after 7. During this seek operation, the serial printer 4 requests the print booter for the second line to the OK2 buffer 8, and
When the seek operation is completed, the second line printing operation begins.

1. Effects of the Invention As explained above (2. This invention detects the print position early using the data sent from the processing device to the 7real printer, and prints the print positioning data while printing the previous line of data. By sending , the printing operation becomes possible immediately after the printing operation is completed.

This has the effect of maximizing the printing speed of the serial printer.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a configuration example of the present invention, and FIG. 2 is a time chart showing the operation of the data transfer system of the serial printer of the present invention. l: Processing device, 2: Interface control unit, 3: Buffer unit, 4 Digital printer, 5: Seek data detection unit, 6: Seek data writing unit, 7: IT buffer, 8
:i2 buffer.

Claims (1)

[Claims] (1) In a data transfer method that serially transfers data from a processing device to a printer, there is an interface control unit that controls the control necessary for exchanging data with the processing device, and a device that receives data from the processing device via the interface control unit. a buffer section that temporarily stores the data and supplies it to the printer; a seek data detection section that analyzes the data in the buffer section and detects seek data that determines the print position; and a seek data detection section that sends the detected seek data to the buffer section. A data transfer method for a serial printer, which has a seek data writing section for writing, and detects seek data for data to be printed on the next line while the printer is printing.