JPH0438592A - Electronic register - Google Patents

Abstract

PURPOSE:To easily and precisely retransmit printing unfinished data by possessing a master CPU to control an electronic register and a slave CPU to executes printing under the control of it and providing a means to add a serial number to printing data and to transmit them to the slave CPU in the master CPU. CONSTITUTION:As far as the vacancy of a printing data buffer exists within a memory 5 even in the middle of printing, printing data from a master CPU 1 are stored with a serial number. When the abnormal situation of power supply interruption and so on, since it is difficult for the master CPU 1 to judge how much the printing is finished, a slave CPU 4 notifies the serial number attached to the printing data to the master CPU 1 through an interface circuit 6 every time when the printing of the one piece of the printing data is finished. As a result, the master CPU 1 can grasp the range of printing finishing actually. Thus, printing omission can be prevented by judging the printing data in the middle of the printing from the above mentioned grasped printing finished data and retransmitting by the master CPU 1 after the power supply interruption is restored or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is used in POS systems, credit processing terminals, and the like. The present invention relates to an electronic register that illuminates receipts in receipt printers, receipt journal printers, three-station printers, and the like.

(Prior Art) A conventional electronic cash register includes a main CPU and a slave CPU that controls the printing function of a receipt printer, etc. When printing on a receipt printer, the main CPU sends print data to the slave CPU, By receiving a response indicating that it has been received, it was determined that the slave CPU had finished printing. However, if there is a power outage or the like, for example, even if the transfer of print data has been completed, the actual printing may be incomplete.

For this reason, with conventional electronic registers, unfinished printing is manually checked, sales data in the print data is compared with print completion data, and print data for multiple receipts is stored in the main CPU side, and after a power outage is restored, The last receipt is sent to the printer again as print data, the slave CPU's memory power is backed up, and if there are any unprinted lines, they are printed again after the power is restored. There is.

(Problem M to be solved by the invention) However, among the above-mentioned printing interruption processes, the one-man method requires troublesome work, and the printing data for multiple receipts must be stored on the main CPU side. However, with the method of sending the print data for the last receipt to the printer again after a power outage is restored, it is difficult to accurately determine how far the actual printing has been completed, and it is impossible to avoid overprinting. Ta. Also, slave CP
In the method of backing up the memory power of U and printing again if there are lines that have not been printed after power failure, the slave CP
There was an economical problem in that an expensive memory was required for power backup of the U's memory.

The present invention aims to provide an electronic register that eliminates the above-mentioned printing problems.

(Means for Solving the Problems) The present invention achieves the above object by using a main CPU that controls an electronic register.
The CPU has a means for adding a serial number to print data and sending it to the slave CPU, and the slave CPU has a means for receiving the print data. The serial number of the above-mentioned print data is added to each information, and the information that the printing is finished when the printing is finished, and the main C
This is achieved by a configuration in which the PU is provided with a means that enables transmission.

(Function) According to the electronic register of the present invention, the main CPU sends print data with serial numbers attached to it to the slave CPU, and the slave CPU sends information that it has received the print data to the main CPU, and then prints the data. After the printing is finished, the main CPU adds the above serial number to the print data to indicate that printing has finished.
Even if printing is interrupted due to an unexpected situation such as a power outage, the main CPU can determine how much printing has been completed based on the serial number attached to the print data, making it easy to remove unprinted data. , can be retransmitted accurately.

(Example) Hereinafter, the present invention will be explained with reference to Examples and drawings.

FIG. 1 is a block diagram showing the configuration of an electronic register according to an embodiment of the present invention. ■ is the main CPU, 2 is the main CP Tl
1 program and print data, and this memory is backed up by a battery as a power source. 3 is receipt printer, receipt
A printer such as a journal printer or a three-station printer; 4 is a main CPU that controls the printer 3;
A slave CPU slaved to I, 5 a second memory storing the slave CPU 4 program and print data, 6 a master CPU
An interface circuit 7 indicates a peripheral device for exchanging data between the PUI and the slave CPU 4.

In the configuration of the electronic register as described above, the printer 3
, the main CPU 1 assigns a serial number to the print data and sends it to the slave CPU 4 via the interface circuit 6.
After storing the sent print data in the memory 5, the slave CPU 4 transmits information that the print data has been received to the main CPU via the interface circuit 6, and then the printer 3 starts printing.

Even during printing, as long as there is space in the print data buffer in the memory 5, the print data from the main CPUI is stored together with the serial number. Therefore, there is a difference between the received print data and the printed data by the number of print data buffers, and if an abnormal situation such as a power outage occurs, the main CPU
Since it is difficult to judge how far printing has been completed in I, the slave CPU 4 notifies the main CPU through the interface circuit 6 of the serial number attached to the print data every time printing of one print data is completed.

As a result, the main CPU can actually grasp the printing end range. Therefore, after a power outage is restored, the main CPU determines the print data that is currently being printed based on the print completion data that is grasped above and resends the print data, thereby completely preventing printing omissions.

The present invention will be explained in more detail below.

FIG. 2 is a block diagram illustrating the interface circuit 6 of FIG. 1. 8 is the main CPU system, which is the main CPU in Figure 1.
It consists of a UI, memory 2, and peripheral devices 7. 9 is a dual port RAM; 10 is a printer controller (hereinafter abbreviated as P controller) corresponding to the subordinate CPU 4 in FIG. 1;
11 is a communication controller that performs serial communication with the P controller IO.

12 is a P controller memory corresponding to the memory 5 in FIG. 1, and 13 is a printer.

The dual port RAM 9 and the communication controller 11 correspond to the interface circuit 6 between the CPUs shown in FIG. 1, and as shown in FIG. , and a printing end serial number E are assigned.

FIG. 4 is an operation flowchart when print data is sent from the main CPU system 8 to the P controller 10. First, the character string of the print data is stored in the dual port RAM 9 (Step 1 (hereinafter referred to as S1)). Next, the print data transmission serial number S is incremented by one (S2), an interrupt is made to the communication controller 11 (S3), and an interrupt waits for completion of print data reception from the communication controller 11 (S2).
4). The communication controller 11 receives the character string L of print data and the sending serial number S by interrupt processing (S5
).

The main CPU system 8 is interrupted via the signal line 15 in FIG. 2 (S6). Next, the character string of the print data and the sending serial number S are sent to the P controller 10 via the signal line 16 in FIG. 2 (S7), and the main CPU system 8 is sent to the communication controller via the signal line 14 in FIG. In response to the interrupt from 11, the print data interrupt ends (S8).

The above print processing continues until the print data buffer of the P controller 10 is finished. The P controller 10 causes the printer 13 to print the data in the print buffer in accordance with an interrupt signal sent from the signal line 17 in FIG. When printing is completed in units of the sent print data, print end information is sent to the communication controller 11 along with the serial number attached to the print data via the signal line 16 in FIG. Note that this serial number is hereinafter referred to as the end serial number.

Next, as shown in the operation flowchart of the communication controller in FIG. 5, the communication controller 11 receives the ending serial number and stores the ending serial number in the dual port RAM 9 in FIG. 3.

FIG. 6 is an operational flowchart of power outage processing in the main CPU system 8. When a power outage occurs (Sl), the sending serial number and ending serial number in the dual port RAM 9 are
The power is stored in a non-volatile memory with backup power (S2), the power outage interrupt is terminated, and when the power is restored from the power outage (S2).
3) Compare the sending serial number and the ending serial number in the non-volatile memory (S4), and if they match, printing is complete; if they do not match, print information indicating that there was a power outage interruption during printing (S5). ), the unprinted data is retransmitted (S6), thereby completing the process at the time of power recovery.

(Effects of the Invention) As is clear from the above explanation, the present invention prevents printing from being incomplete due to a power outage or the like during printing by the printer, without backing up the memory of the main CPU system that controls the printer. It is also an electronic register that can automatically print unprinted data and has the advantages of being economical and easy to use, so it can be used to great effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an outline of an embodiment of the present invention, FIG. 2 is a block diagram explaining an interface circuit, and FIG.
The figure shows the memory allocation of the main parts of the present invention, and Figure 4 shows the main C
FIG. 5 is an operation flowchart of the PU system, FIG. 5 is an operation flowchart of the communication controller, and FIG. 6 is an operation flowchart showing power outage processing in the main CPU system. 1... Main CPU, 2... (first) memory,
3.13...Printer, 4...Slave CPU, 5...
(second) memory, 6... interface circuit,
7... Peripheral equipment, 8... Main CPU system,
9...Dual port RAM, to...Printer controller (P controller), 11...Communication controller, 12...Memory for printer controller. Patent applicant Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] The main CPU has a main CPU that controls the electronic register, and a slave CPU that performs printing in a slave manner to the main CPU. Means is configured to add a serial number of the print data to each of the information indicating that the print data has been received and the information indicating that the print is completed when the print data is completed, and to send the information to the main CPU. An electronic register characterized in that: