JPS58146929A - Method for receiving data of printer - Google Patents

Abstract

PURPOSE:To print out a large volume of information with a small capacity of memory, by using a memory of which capacity is less than that accumulating information corresponding to one line, starting printing when the memory is filled with information and transferring data to the memory even if the printing is in execution. CONSTITUTION:A control part 42 is connected to the main side through an interface 41 and stores information from the main side in an RAM43. A printing mechanism interface 44 arranged between an unshown printing mechanism and the control part 42 is connected to the control part 42. When the RAM43 is filled with information, a signal for stopping data transfer is sent to the main side and printing is started through the printing mechanism interface. When a space to store information is generated in the RAM43 again, the control part 42 receives data from the main side again and stores the data in the RAM43. Consequently, a large volume of information can be printed out with a small capacity of RAM.

Description

[Detailed description of the invention] The present invention provides a data receiving method for a printing device.

For more details, from the main information processing device to the printing device FK
Printing devices capable of printing in response to bits of transmitted data, such as wire tod matrix printing machines,
The present invention relates to a data receiving method for a thermal printing press and an inkjet printing press.

FIG. 1 shows a block diagram of a conventional printing device.

This is an interface with the processing equipment on the main side.

This is a control unit of a two-digit printing device. Information from the main processing unit is stored in 3 memories (herein referred to as RAM) from an interface 1 under the control of a control section 2. When the amount of information set in advance to be sent from the main device has been stored in the RAM 3, printing is started. For printing, the printing timing from the control unit 2 or the printing mechanism 5 is received through the printing mechanism interface 4, and the information stored in the RAM 5 and sent from the main side in synchronization with the printing timing is sent to the printing mechanism interface 4Kj [next Then, energize the wire tod head for 8 times.

The interface section 1 will be described in more detail as shown in FIG. In other words, information from the main side is sent to the receiver.
22 can be input to the data register 21. The data stored in the data register 21 is latched by the sTioBmml number sent with the data. At the same time, a flip-flop (hereinafter abbreviated as shear) 24 is set,
control! Main ll in data register 21 for 1a2
outputs a signal t6 indicating that data has been written,
R through the driver 23 that is also received on the main side.
D! Output as a signal. When the control unit 2 receives the signal 26, it reads data from the data register 21, data reception j! ! After the second selection, the signal 27 is output, the lFF24 is reset, and the main lI! lK Indicates that the following data can be written and sent.

The data received in this manner may be sent to the controller 2 or RA.
Sent to M3. The first data is stored in the RAM 3 at the OK address, and the subsequent data sent sequentially is stored by increasing the RAM address sequentially.

Normally, when a ＾FJC E code or J Engineering S code is sent to a printing device, a character generator (hereinafter abbreviated as ＠OG) with mK in the printing box is used to convert one character into 6 horizontal symbols or horizontal One character is formed by decomposing it into 12 positions. Normally, one position can be expressed in one byte, so one character is represented in six digits and 12 bytes. Therefore, printing 8o digits! ! # has a memory of 480 bytes or 960 bytes, receives the code as information from the main processing at, and stores it in the memory as print data. Therefore, even when information corresponding to print data is sent from the main processing device, printing starts when any of the 480 bytes of data has been stored.

Print in RAM! Since the 9 data stored in 5 is to be printed as is, the first data of address ○ in the control unit's 2-digit RAM 3 is set in the wire head head by a synchronization signal generated from the printing mechanism, and the head is energized. onwards,
l[Rk in synchronization with the next synchronization signal from the printing mechanism
Sequentially increase the address of M and transfer the data from RAM3 to the wire head)'L, Finish printing one line of data.

As mentioned above, the conventional data processing method requires 960 bytes of storage space on an 8-digit wire-toad printer! Therefore, a 136-digit machine requires 1632 bytes of memory.

For this reason, in the control section of a one-chip micro combinator such as Intel's 8048.8049, it is impossible to secure enough memory area for the light, which hinders miniaturization and also reduces functionality.

It is an object of the present invention to compensate for the drawbacks of the conventional printers, and to provide the market with a printing device that is inexpensive and can use the interface signals with the main processing AT without being indistinguishable from those of the conventional printers.

Below, as an example of a unit using the present invention, we will describe a printing device K that uses a wire tod head and performs a no-and-shake with the main processing device using two signals IIK. It is also effective to use @ for other print bar structures and handshakes.

FIG. 3 is a block diagram of the present invention. It is an interface with a 41-digit main processing unit l1l (hereinafter referred to as main) and a 42-digit control unit, which is a one-chip micro combiator such as Intel's 8049.

43 ke FIAM. However, although l'lAM is used here to make it the same block as the conventional one, by using the data register 51 in the interface shown in FIG. 4, the RAM 43 can be omitted. This is an interface with the 44-digit printing mechanism.

When data is sent to the main side, whose interface section is shown in FIG. 4, it is input to the data register 51 through a buffer (control section) 52. 8 sent with data
1154 is set by the ROBK signal and latched into the data register 51. 52 control unit receives signal 5
5, the contents of the abstract data register 51 are taken as W2L. Main IIIKRDY is controlled by the signal 56 controller 52.
In one initial situation, the signal is 56 digits H4gh, which controls the possibility of returning the signal 58fr or the possibility of returning the signal 58fr. When the signal 56 becomes Hiσ, the state of the FF 54 is directly output as an RDY signal 58 through the driver 53. When the signal 56 is Low, the TIDY signal 58 is FF54
When this RDY signal 58, which indicates the B%$LII state, is Loso, the main unit is prohibited from transferring the next data.

FIG. 5 shows a flow chart of the operation of the present invention.

The M43 has a capacity of 128 bytes, and when the power is turned on, the reed 54 is reset, the output of the RDY41 No. 58 goes high, and the main III 251 data is transferred. One message sent by the main side along with data transfer
When IFIF 54 is set by the OBN signal, signal 55 is set. Detecting the signal 55, the control unit 4
The contents of the address OK data register 51 of the 2FiRAM 43 are stored. Data from the main side is stored in the RAM 45 and has a counter 59 for knowing the number of runs.

Although the counter 59Fi constitutes one block in FIG. 5, the register in the control section 42 can also use a part of the memory. Counter 59 is RAM4
When the data from the main side is shown to be good within 5,
That is, when the main has finished sending the 12B data, the counter 59 is corrected to 0, and I proceed to the next data sent by the main.

Before outputting the RDY signal from signal 58, BUOY (Loso) is output from signal 56 (signal 58 is set to Low). By this operation, main side Fi#
Wait for the transmission of the 129th data until the signal 58 becomes 'Rn y (High>). Here, the signal 55Vi signal 58
7P54 is reset by signal 57. Control unit 42, printing mechanism interface 4
4 to start printing. When the control unit 42 receives the print synchronization timing from the interface 44, the control unit 4
Print address pointer of 2 (initial state!+#Li0
) is extracted from the address of the eight ports 15, and the wire dot head is energized through the interface 44 according to the bit indicated by the data. Interface 44
stores energization data. After sending the energization data to the control unit 42 and interface 44, one print address pointer is advanced. ! Since the data stored at address 0 of tAM43 is now 1[K, control 1i1142
H signal %56*High is output, RDY signal is output from signal 58, and the 129th data is sent from the main side. The control unit 42 simultaneously monitors both the print timing from the interface 44 and the signal 550 indicating that data from the main side has been used.When data is transferred from the main side, data is sent from the data register 51 to the control unit. Received 42 digit data, RAM 4 indicated by counter 59
Store data at address 3. That is, the address OK data t is stored. Here, the value of the counter 59 and the print address pointer are compared, and since they are equal, even if there is data transfer from the main side, there is no empty area in the FtAM to store the next data, so the signal 56 is output to LouK. L
, sets the signal 58 to the BUOY state and resets the signal 154+. Also, if the value of the counter 59 and the print address pointer are compared and if they are not equal, even if the next data is received from the main side, the empty space stored in the RAM 45 will be
Since there is a region of
Reset P54 and set signal 58 to READY state 1i
K.

Since the processing of some data is a simple operation of collecting and storing data, the printing operation is processed in parallel, and when the 11 mark timing comes, the data is scattered from the address of the RAM 4S indicated by the print data pointer, and Drive the wire tod head through. Is this firefly data address juice for printing? Advance one inter. at this point
If the print data address pointer exceeds 128, check if it is OK and printing is complete. Completion of printing is determined by a predetermined number, in this case a printing device that can print 80 digit characters, has a counter that counts 480.
At the start of printing, set K 480 K, and every time the 1gm wire tod head is energized, one will disappear and it will be detected when it is OK.

If the main side does not send data on the way, the print data pointer will be inconsistent with the contents of the counter 59, so energize the wire tod with the data, and when it is finished (that is, the 9 data sent from the main side) The printing operation is interrupted when all the files have been printed. Then, when the data is sent from the main Confucian, start again from the beginning of the quantity.

However, at this time, the counter for checking print completion is 480.
Instead of setting it to 480, it is set to 480 when the printing operation starts after printing one line is completed.

Also, even if you receive a code such as a normal ABO E code 0 Nuke J engineering S code, 1 byte of data from the main processing unit will be increased by 6 or 12 bytes internally from the OGK, as described above. This can be achieved using the same method as the meeting.

In this way, adding the signal 56 controlled by the control 1142,
Memory? By using it as Niji O, the main al
960 bytes of information can be printed with 128 bytes of memory without changing the interface signals of l, and the printing device that prints bit-compatible data becomes smaller and cheaper. The contribution to information processing systems is enormous.

1

[Brief explanation of the drawing]

1 shows a block diagram of a first @lFi conventional printing device; FIG. IFi main processing equipment and processing equipment interface 2 shows the control unit 3 RAM 4F1 printing device and the printing device interface. The second TIAFi is a companion to the interface section 1 in FIG. 1, which is divided into fine blocks. DATA, 8TROBI Fi) This is a signal sent from the in-processing at. The RDY signal is an output signal from the printing device indicating that the printing device is ready to receive data. FIG. 3 is a block diagram of the printing apparatus of the present invention. FIG. 4 is a detailed block diagram of the interface section 41 of FIG. 3. FIG. 5 is a flowchart showing the operation sequence of the present invention. "Applicant Shinshu Seiki Co., Ltd. Suwa Seikosha Agent Patent Attorney Tsutomu Mogami 2" -137- Figure 5

Claims (1)

[Claims] In the data receiving method of the printing device, there is a memory with a storage capacity that is less than the amount of information stored for -digits, a printing structure that performs printing corresponding to the number of received data, and a printing device that prints data corresponding to the number of received data, and when the data in the memory is full. 9, the printing device has a detection unit that detects whether or not the printer is present and sends a detection signal to the information processing device side; A data reception method for a printing device.