JPH0538706Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to control of reading embroidery data from an embroidery machine or computer sewing machine having a memory card that is removably attached to the machine frame.

(Background) In recent years, memory cards have come to be used as data storage media for embroidery machines and computer sewing machines. This system requires no special equipment to read data (a floppy disk drive requires a floppy disk drive, and a magnetic tape reader requires a magnetic tape reader), and it is small and easy to handle. This is due to the fact that high-capacity IC memory has become cheaper. On the other hand, compared to other storage media, memory cards have the disadvantage of being susceptible to static electricity because the bus for reading data is exposed. If data that has been changed by static electricity is used as it is, there is a risk that the embroidered characters may collapse or the needle may break, causing injury to the user. Therefore, before using the data in the memory card, it is necessary to check whether the memory is corrupted or not, and if it is, it is necessary to display a message to replace the memory card.

(Prior art and problems to be solved by the invention) Conventionally, a predetermined relationship between a predetermined address of the memory of a memory card and the sum of values stored at addresses other than the predetermined address (for example, a value obtained by taking two's complement)
A certain value was stored in the memory card, and the memory card was inspected when the power was turned on or when the memory card was inserted. Therefore, if the data is destroyed in even one place, the memory card cannot be used, and if the memory contents are destroyed in two or more places, and the sum of these is the same as the sum before destruction, the inspection will be missed and the card will not be accurate. I couldn't do a proper check.

(Means for Solving the Problems) The present invention stores inspection data for each piece of embroidery character data, which is the smallest unit that the central processing unit accesses at one time, and executes the above inspection at the time of selectively storing the data. Even if some data is corrupted, it is possible to sew other than the related embroidery characters. Additionally, data can be inspected immediately before being transferred to the internal RAM, making inspection more reliable than before.
On the other hand, if the data is destroyed in two or more places where the capacity of the memory to be inspected is large, and the sum of these is the same as the sum before the destruction, the inspection will be missed, but in this invention, the object to be inspected is the embroidered character data. Since it is divided into units, there are fewer inspection omissions than before. In the second claim of the utility model registration, each test data is also stored in memory area #0 where the identification value of the memory card and the start address value of each embroidered character data are stored, and these contents are stored in the memory. Memory area #0 is stored in three locations in the memory area, read out, and determines that the value in the area where the stored content matches two or more locations is correct.
This allows for more reliable inspection than conventional methods.

(Example) Embodiments of the present invention will be described based on the drawings.

FIG. 1 is an external view of the embroidery machine. A support 2 supporting an embroidery frame 1 holding cloth moves relative to a sewing needle 3, and a needle bar 4 moves up and down to embroider the cloth. 8 is a display device which instructs the user about embroidered characters and operation messages. Numeral 9 is a key for selecting and storing embroidery characters, manually setting the embroidery position, and specifying the start and stop of embroidery. 5 is machine frame 6
It is a removable memory card.

FIG. 2 is an external view of the memory card, with a terminal portion 7 exposed at one end.

Figure 3 is a system block diagram.The data bus line (BL) from the central processing unit (CPU) is
ROM (ROM) that stores the embroidery machine control program;
RAM as a temporary storage device for embroidery data, etc.
(RAM), a sensor (SEN) for obtaining various signals for controlling the embroidery machine via the input/output device (I/01), and the aforementioned key 9 via the input/output device (I/02). The above-mentioned display device 8 via the device (I/03), the sewing machine motor (ZMOTOR) that moves the sewing needle 3 up and down via the input/output device (I/04) and the drive device (DV), and the above-mentioned support 2 Actuator (XMOTOR, YMOTOR) that moves
In addition, an actuator (ACT) necessary for executing embroidery and the above-mentioned removable memory card 5 are connected.

Address bus lines and control bus lines are omitted.

FIG. 4 is a map of the memory in the memory card, where A is the case described in the first claim of the utility model registration, and B is the case described in the second claim of the utility model registration.

This section explains the memory map of 2.

The #0 memory area contains the memory card identification value (predetermined to a predetermined value to inform the CPU of what kind of embroidery data is stored in the memory card) and the beginning of each embroidery character data. It stores address values, their byte lengths, etc.

In #memory area (=1, 2, to n), each embroidery character data is stored at an address starting from the embroidery character data first address of the #0 memory area.

A value that has a predetermined relationship with the sum of the embroidery data stored in each storage area (added in units of 1 byte), for example, a value obtained by taking the two's complement (inspection data), is stored at the end address of each storage area. put.

The memory map of RO is explained below.

The #0 memory area also contains #1 to #n test data, and the contents are stored in three locations (A, B, C) in the memory.
Let me remember it. In this case, since the inspection method for the #0 memory area is different from that for other memory areas, there is no #0 inspection data.

(Explanation of Operation) The operation of the above-described configuration will be explained based on the flowchart of FIG. 5. This flowchart is
This is a detailed description of the embroidery data reading process in the embroidery machine control program stored in the ROM.

A is a flowchart corresponding to the first claim of the utility model registration, and B is a flowchart corresponding to the second claim of the utility model registration.

In step (a), the desired embroidery character is selected using the character selection key in key 9. If you are in the middle of making a selection,
(b) Branch to step NO. When the embroidery character selection is completed, the memory key in the keys 9 is pressed, and in step (c), a memory card insertion/removal detection circuit (not shown) checks whether the memory card 5 is installed.
If the memory card 5 has been removed, a message is displayed on the display device 8 to instruct the memory card 5 to be inserted in step (d). In step (e), read out the values in the #0 storage area, calculate the sum, and add it to the #0 test data read out in step (f). If the result is 0 in steps (g) and (h), read the identification value of the memory card, determine whether the memory card contains the embroidery character data selected this time, and if so, (i ) Proceed to step ). In step (i), the embroidery data in the #i memory area is read out, the sum of the data is calculated, and the result is added to the #i test data to determine whether the result is 0 or not in step (k). If the judgments in (g), (h), and (k) are NO, then in step (l) a message is displayed on the display device 8 indicating that the memory card 5 should be replaced, and the process returns to step (c). If the judgment in step (k) is YES, in step (m) the embroidery character data in the #i memory area is transferred to the RAM.
In step (n), the selected and stored embroidery characters are displayed on the display device 8 using the display data in the embroidery character data, and the embroidery character data reading process is completed.

FIG. 5B is a flowchart corresponding to claim 2 of the utility model registration claim, and only the parts that are different from B will be explained.

At step (o), #0 memory area 3 locations (A,
Read B, C). Then, in steps (p) and (q), it is determined whether the contents of A and B and A and C are the same. If they are the same, the process proceeds to step (s), and the memory card is identified and The start address value of the #i memory area where the selected embroidery character data is stored and the #i inspection data are taken out. A≠B,
If A≠C, proceed to step (r) and determine whether the contents of areas B and C are the same. If they are the same, proceed to step (t) and extract the identification value of the memory card, the start address value of the #i memory card where the embroidery character data selected this time is stored, and the #i inspection data according to the contents of the area B. .

(Effects) The present invention stores inspection data for each piece of embroidery character data, which is the smallest unit that the central processing unit accesses at a time, and executes the above inspection at the time of selectively storing the data. Even if it is broken, you can sew anything other than the embroidery letters related to it. Additionally, data can be inspected immediately before being transferred to the internal RAM, making inspection more reliable than before.
On the other hand, if the capacity of the memory to be inspected is large, data is destroyed in two or more places, and if the sum of these is the same as the sum before destruction, the inspection will be missed.However, in the case of this invention, the object to be inspected is embroidered character data. Since it is divided into units, there are fewer inspection omissions than before. In paragraph 2 of the claims for utility model registration,
Each test data is also stored in memory area #0 where the identification value of the memory card and the start address value of each embroidery character data are stored, and these contents are stored in three locations in the memory, and these are read out. Since memory area #0 is tested in a manner that determines that the values in areas where the stored contents match in two or more locations are correct, the test can be performed more reliably than in the past.

[Brief explanation of the drawing]

Figure 1 is an external view of the embroidery machine, Figure 1-A is a detailed view of the key 9, Figure 2 is an external view of the memory card, Figure 3 is a system block diagram, and Figure 4 is a diagram of the memory inside the memory card. In the memory map, A corresponds to the first claim of the utility model registration, and B corresponds to the second claim of the utility model registration. Fig. 5 is a flowchart of the embroidered character data reading process, and Fig. 6 is a flowchart of the embroidered character data readout process, and Fig. 6 is a flowchart of the embroidered character data readout process, and B is the scope of the utility model registration claims. This corresponds to the description in Section 2. 5 is a memory card with a built-in memory that stores embroidery character data, 6 is a machine frame, 8 is a display device that instructs the user about embroidery characters and operation messages, and CPU is a central processing unit that controls the embroidery machine. ,BL
is the bus, ROM is the read-only memory that stores the embroidery machine control program, A, B, C
and D1 to Dn are storage areas, and C0 to Cn are test data.

Claims (1)

[Scope of claim for utility model registration] (1) Character data regarding multiple embroidered characters,
a memory card that stores identification data for identifying the character data, a start address of each of the character data, and unique inspection data for testing the character data; a selection key for selecting a embroidery character; a display means for displaying the selected embroidery character; Read the character data of the Yu character, calculate the sum thereof, compare the sum with the inspection data specific to the selected character data, and when this has a predetermined relationship, select the selected embroidery character. A embroidery machine comprising an inspection means for inspecting the stored contents of a removable memory card, comprising an inspection means for displaying the valid information on the display means. (2) The memory card is divided into a plurality of memory areas, and a first memory area stores the identification data, the start address of each of the character data, and inspection data for inspecting the stored contents, and other memory areas. The memory area contains character data related to different characters,
Inspection data specific to the character data is stored,
The inspection means operates in response to the operation of the selection key, reads out the storage contents of the first memory area, obtains a sum thereof, and compares this with the inspection data to obtain a predetermined relationship. The character data of the embroidery character selected by the operation of the selection key is read out, the sum is calculated, and this is compared with the unique inspection data to obtain the predetermined relationship. Inspection means for inspecting the stored contents of a removable memory card according to claim 1, characterized in that the character data is validated and the selected embroidered characters are displayed on the display means. A embroidery machine equipped with (3) The memory card is divided into a plurality of memory areas, and at least three of the memory areas store the identification data, the start address of each of the character data, and unique inspection data of each of the character data. character data of the different embroidery characters are stored in the other memory areas, and the inspection means operates in response to the operation of the selection key to mutually exchange the stored contents of the three memory areas. When two of them match, the character data of the embroidery character selected by operating the selection key is read out from one of them, the sum is calculated, and this is added to the unique inspection data. The removable memory card according to claim 1, wherein the character data is validated and displayed on the display means if the character data is in a predetermined relationship compared with the character data. A stabbing machine equipped with testing means to test memory contents.