Patent Application
20180357168
The present invention relates to the field of print imaging and, in particular, to a storage medium, a data processing method and a cartridge chip using same.
In a print imaging device such as an ink-jet printer or a laser printer, a recording material (for example, ink or toner) is provided by using a consumable cartridge. The recording material is accommodated in the consumable cartridge. When the recording material is used up, a user only needs to replace the consumable cartridge to continue to use the printer. To make it convenient to manage the consumable cartridge, a cartridge chip is disposed in the consumable cartridge. The cartridge chip stores information about the consumable cartridge, such as the manufacturer, the type of the recording material (toner or ink), color, capacity, or usage status. Therefore, when the user installs the consumable cartridge to the print imaging device, the information stored in the cartridge chip can be provided to the print imaging device, and the print imaging device can learn the basic information about the consumable cartridge. In addition, in the process of using the consumable cartridge, updated information such as usage status information is written to the cartridge chip.
To prevent information in a cartridge chip from being improperly modified, memories in some cartridge chips are divided into several areas. A memory in the prior art shown in
However, because of the restrictions on accessing the cartridge chip, operations performed by the print imaging device on the cartridge chip cannot be relatively completely recorded. In to some cases, an error occurs in the print imaging device. If the cartridge chip can record the operations of the print imaging device without access restrictions, auxiliary information can be provided during subsequent maintenance. The present invention researches on how to unrestrictedly record operations performed by a print imaging device on a cartridge chip on the premise of maintaining the uniqueness of information in the cartridge chip.
The present invention provides a storage medium, a data processing method and a cartridge chip using same, so as to resolve the foregoing problems in the prior art.
One aspect of the present invention provides a data processing method for a cartridge chip, where the cartridge chip includes a primary storage area and a backup storage area, and the data processing method includes:
determining whether a received instruction is a read instruction or a write instruction; and
if the received instruction is a write instruction, writing, according to an address included in the write instruction, data carried in the write instruction to a location to which the address points in the primary storage area, and determining, according to a preset rule, whether data in the backup storage area needs to be updated.
Another aspect of the present invention provides a cartridge chip, where the cartridge chip includes: an interface unit, a storage unit, and a control unit, where the storage unit includes a primary storage area and a backup storage area;
the interface unit is configured to receive an instruction sent by a print imaging device; and
the control unit is configured to: determine whether the received instruction is a read instruction or a write instruction; and
if the received instruction is a write instruction, write, according to an address included in the write instruction, data carried in the write instruction to a location to which the address points in the primary storage area, and determine, according to a preset rule, whether data in the backup storage area needs to be updated.
Still another aspect of the present invention provides a cartridge chip, where the cartridge chip includes a processor, and the processor is configured to execute program code, to implement the foregoing data processing method for a cartridge chip.
Yet another aspect of the present invention provides a storage medium, where the storage medium stores program code, and the program code is used for implementing the foregoing data processing method for a cartridge chip.
Still another aspect of the present invention provides a cartridge chip for a consumable cartridge, including:
a storage unit, including a primary storage area and a backup storage area, where the primary storage area stores data related to the consumable cartridge;
addresses in the backup storage area are in a one-to-one correspondence with addresses in the primary storage area, and the backup storage area is configured to store data that corresponds to the addresses in the primary storage area, where the data includes update configuration data, where
the update configuration data is used for instructing, when a write instruction and/or a read instruction is received, how to respond to the write instruction and/or the read instruction according to a preset rule.
Yet another aspect of the present invention provides a cartridge chip for a consumable cartridge, including:
a storage unit, including a primary storage area, a backup storage area, and a response storage area, where
the primary storage area stores data related to the consumable cartridge;
the response storage area stores response type information that is in a one-to-one correspondence with addresses in the primary storage area; and
the response type information includes at least one of the following: response type information when both a write instruction and a read instruction point to the primary storage area, response type information when a write operation is performed on the backup storage area after being performed on the primary storage area for the first time, or response type information when an error message is replied during writing.
According to the storage medium, the data processing method and the cartridge chip using same provided in the present invention, each piece of written information can be recorded in the primary storage area in time by using the data processing method and the cartridge chip using same provided in the embodiments of the present invention. To ensure the uniqueness of information in the cartridge chip, information in the backup storage area is updated only when conforming to the preset rule. In this way, operations performed by the print imaging device on the cartridge chip can be unrestrictedly recorded, and the uniqueness of the information in the cartridge chip can be ensured.
To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
In the present invention, the terms such as “mounted”, “connected”, and “fixed” should be broadly understood. For example, “connected” may be fixedly connected, detachably connected, or integrally connected. A person of ordinary skill in the art may understand specific meanings of the terms in the present invention according to specific situations.
It should be noted that, in the description of the present invention, the terms “first” and “second” are merely used for conveniently describing different components, and should not be construed as indicating or implying a sequential relationship or relative importance, or implicitly indicating the quantity of indicated technical features. Therefore, the quantity of features defined with “first” and “second” may be explicitly or implicitly at least one.
Unless otherwise defined, all technical and scientific terms used in the specification have the same meaning as commonly understood by a person skilled in the technical field of the present invention. The terms used in the specification of the present invention are merely for describing the specific embodiments, and are not intended to limit the present invention.
The following describes in detail some implementations of the present invention with reference to the accompanying drawings. The embodiments and the features thereof may be combined together provided that no conflict occurs among the embodiments.
A structure of a cartridge chip detachably mounted to a consumable cartridge and provided in an embodiment of the present invention is shown in
The interface unit 100 is electrically connected to an imaging device, to receive a read instruction and a write instruction sent by the imaging device. The read instruction or the write instruction includes address information of a specific location to which the instruction points. The interface unit may be connected to the imaging device in a wired or wireless manner.
The storage unit 300 generally stores information about an imaging box, such as ink cartridge identification information, the manufacturer, a production date, an ink usage amount, and a remaining ink amount. The storage unit uses a common nonvolatile memory such as an EPROM, an EEPROM, a FLASH, a ferroelectric memory, or a phase change memory; or may adopt a scheme of a volatile memory plus a power supply, for example, SRAM+battery or capacitor, or DRAM+battery or capacitor.
The control unit 200 is configured to process the read instruction and the write instruction received by the interface unit. Specifically, the control unit is configured to: determine whether a received instruction is a read instruction or a write instruction, and if the received instruction is a write instruction, write, according to an address included in the write instruction, data carried in the write instruction to a location to which the address points in the primary storage area; or
if the received instruction is a read instruction, determine whether there is backup data that is in the backup storage area and that corresponds to an address included in the read instruction; and if there is backup data, read the data from the backup storage area; or if there is no backup data, read data from the primary storage area according to the address in the read instruction.
When the received instruction is a write instruction, after a write operation is completed, the control unit determines, according to a preset rule, whether information in the backup storage area needs to be updated.
It should be noted that the preset rule may be a preset update control list. The update control list may store specific update information. Alternatively, the preset rule may be a preset update determining rule. The update determining rule may determine a specific response update manner based on a storage data feature or a storage address feature of the primary storage area and/or the backup storage area in the storage unit and/or a type of the received instruction (a read instruction or a write instruction). Specifically, an implementable manner is: determining the specific response update manner based on the storage data feature of the primary storage area and/or the backup storage area. Another implementable manner is: determining the specific response update manner based on the storage address feature of the primary storage area and/or the backup storage area. Still another implementable manner is: how to determine, after a read instruction or a write instruction is received, a response update manner that corresponds to the type of the instruction. Yet another implementable manner is: how to determine, based on the storage data feature of the primary storage area and/or the backup storage area when a read instruction or a write instruction is received, a response update manner that corresponds to the storage data feature of the primary storage area and the backup storage area and the type of the instruction. Still yet another implementable manner is: how to determine, based on the storage address feature of the primary storage area and/or the backup storage area when a read instruction or a write instruction is received, a response update manner that corresponds to the storage address feature of the primary storage area and the backup storage area and the type of the instruction.
Step S10: Determine whether a received instruction is a read instruction or a write instruction.
An implementation of determining whether the instruction is a read instruction or a write instruction may be as follows: The instruction is compared and analyzed with a preset standard read instruction. If the instruction matches the standard read instruction, it is determined that the instruction is a read instruction; or if the instruction does not match the standard read instruction, the instruction is compared and analyzed with a preset standard write instruction. If the instruction matches the standard write instruction, it is determined that the instruction is a write instruction. Alternatively, identification information is extracted from the instruction, and whether the instruction is a read instruction or a write instruction is determined according to the identification information. Specifically, if the identification information matches read identification information preset in a read instruction, it is determined that the instruction is a read instruction. Similarly, if the identification information matches write identification information preset in a write instruction, it is determined that the instruction is a write instruction.
If it is determined that the instruction is a write instruction, in step S11, data carried in the write instruction is written, according to an address included in the write instruction, to a location to which the address points in the primary storage area; or
if the received instruction is a read instruction, in step S12, it is determined whether there is backup data that is in the backup storage area and that corresponds to an address included in the read instruction. If there is backup data, in step S13, the data is read from the backup storage area; or if there is no backup data, in step S14, data is read from the primary storage area according to the address in the read instruction.
In addition, when the received instruction is a write instruction, after a write operation is completed, in step S15, it is determined, according to a preset rule, whether information in the backup storage area needs to be updated.
In another option, whether data in the backup storage area needs to be updated may be determined according to a preset rule when a read instruction is received. When the read instruction is executed, the latest data should be read. Therefore, to determine, when a read instruction is received, whether data in the backup storage area needs to be updated, update of the data in the backup storage area needs to be completed before the read instruction is executed.
In the prior art shown in
Both the primary storage area 310 and the backup storage area 320 are set to be freely accessible without any restriction, that is, both the primary storage area 310 and the backup storage area 320 are read/write storage areas (RW). In addition, the backup storage area is added in this embodiment, and the foregoing data processing method is used for processing a read instruction and a write instruction sent by the print imaging device, to maintain the uniqueness of information in a cartridge chip and prevent the information from being arbitrarily rewritten, so that a print imaging device can recognize the data in the cartridge chip.
Specifically, as described above, a control unit is configured to determine whether a received instruction is a read instruction or a write instruction. If the received instruction is a write instruction, data carried in the write instruction is written, according to an address included in the write instruction, to a location to which the address points in the primary storage area. In this embodiment, the backup storage area 320 is a newly added storage area, and an original range for addressing the cartridge chip by the print imaging device is 0x00 to 0x05. Therefore, when the range for addressing by the print imaging device is not changed, addresses included in the write instruction received by the control unit all point to the primary storage area, and the backup storage area is not addressed by the write instruction. In this case, data in the backup storage area cannot be directly rewritten according to the write instruction. Different from the prior art, each address in the primary storage area 210 can be arbitrarily accessed. For example, when the print imaging device goes wrong and sends a write instruction for rewriting two addresses 0x04 and 0x05, the cartridge chip in this embodiment can be rewritten, so that the abnormal operation of the print imaging device is recorded.
In another case, if determining that the received instruction is a read instruction, the control unit determines whether there is backup data that is in the backup storage area and that corresponds to an address included in the read instruction. If there is backup data, the data is read from the backup storage area; or if there is no backup data, data is read from the primary storage area according to the address in the read instruction. In this embodiment, because the addresses in the backup storage area 320 are in a one-to-one correspondence with addresses in the primary storage area 310, data of each address in the primary storage area 310 is backed up in the backup storage area 320. Therefore, when the control unit determines that the received instruction is a read instruction, data is read from the backup storage area and then returned to the print imaging device through an interface unit.
The primary storage area and the backup storage area are obtained through division, so that the read instruction and the write instruction correspond to different storage partitions. In this way, each piece of write instruction can be recorded and correct data can be returned to the print imaging device. Apparently, addresses 0x00 and 0x01 belong to the read/write storage area (RW). If the area has been rewritten by the print imaging device, when the two addresses are read, data of corresponding addresses 0x06 and 0x07 in the backup storage area should be synchronously updated to the latest data. Therefore, when the received instruction is a write instruction, after a write operation is completed, the control unit further needs to determine, according to a preset rule, whether data in the backup storage area needs to be updated.
Specifically, the preset rule may be in a form of an update control list stored at an address other than the addresses 0x00 to 0x0B in the storage unit. The update control list may be stored at another address in the primary storage area or the backup storage area, or may be stored in another storage area in the storage unit. For example, the update control list includes the following information:
According to the foregoing update control list, after a write operation is completed, the control unit determines, according to the rule in the update control list, whether the data in the backup storage area needs to be updated. Table 1 stores update control list information indicating whether the data that is in the backup storage area and that respectively corresponds to the different addresses included in the write instruction needs to be updated and how the data may be updated. In Table 1, some addresses in the backup storage area are selectively updated according to the corresponding update manners and according to the addresses that are included in the write instruction and that are just processed.
For example, when the address included in the write instruction is 0x00, the control unit copies, to the address 0x06 according to the preset rule in the update control list, data of the address 0x00 to which the data has just been written, to complete update. After the update, the data of the address 0x00 in the primary storage area is the same as the data of the address 0x06 in the backup storage area, thereby achieving synchronous update.
During production, initial configuration may be performed on the data in the backup storage area. For example, the data of the addresses 0x06 and 0x07 and 0x0A and 0x0B may be configured to be the same as data of corresponding addresses in the primary storage area. The data of 0x08 and 0x09 are initially configured to be 0xAA (or other numerical values not very likely to appear). When the address included in the write instruction is 0x02, the control unit first determines data of the address 0x08 in the backup storage area according to the preset rule. Because the data of 0x08 is 0xAA, it indicates that the data of 0x08 in the backup storage area needs to be updated. Data of the address 0x02 to which the data has just been written is copied to the address 0x08, to complete update. After the update, the data of the address 0x02 in the primary storage area is the same as the data of the address 0x08 in the backup storage area, thereby achieving synchronous update. If next time the cartridge chip receives again a write instruction indicating that the address 0x02 needs to be rewritten, because the data of the address 0x08 in the backup storage area has already been updated and is no longer an update condition in the control list, rewriting of the address 0x02 this time and subsequently does not cause update at the address 0x08, thereby implementing the originally set access attribute of “write once”.
When the address included in the write instruction is 0x04, the update control list restricts update performed by the control unit on the backup storage area. Therefore, when the address is read according to a read instruction, data has always been the data initially configured for the backup storage area during production, thereby implementing the originally set access attribute of “read only”.
Table 2 stores update control list information indicating whether the data that is in the backup storage area and that respectively corresponds to the different addresses included in the write instruction needs to be updated and how the data may be updated. The increment write (IW) storage area allows only data greater than original data to be written. For example, if the original data is 0x01, only data greater than 0x01 can be written, and data, such as 0x00, that is smaller than the original data cannot be written. The one direction write (ODW) storage area allows only data to be rewritten unidirectionally, for example, data can be rewritten only from 0 to 1 but cannot be rewritten from 1 to 0. For example, data 0x10 can be rewritten to 0x11, but cannot be rewritten to 0x01 or 0x00. When the received instruction is a write instruction, after a write operation is completed, for the writing of the addresses that have the two types access attributes, the control unit further needs to determine, according to the preset rule in Table 2, whether data in the backup storage area needs to be updated.
When an original access attribute of the address included in the write instruction is increment write (IW), the control unit compares, according to the preset rule in the control list, data of the address in the primary storage area and to which the data has just been written with data of an address that is in the backup storage area and that corresponds to the address. If the data of the corresponding address in the backup storage area is smaller than the numerical value in the primary storage area, the data of the address in the primary storage area is copied to the corresponding address in the backup storage area, to complete update. On the contrary, if the data of the corresponding address in the backup storage area is greater than the numerical value in the primary storage area, update does not need to be performed. In this way, it is ensured that a larger value of the corresponding address in the backup storage area is always updated. In this way, when a read instruction is received, a larger value can be read, thereby conforming to the setting of the original access attribute.
The foregoing read instruction, unless otherwise specified, is an instruction sent by the print imaging device to the cartridge chip. Alternatively, the cartridge chip may define a read instruction and a write instruction of another device. For example, during production of the cartridge chip, a production device may perform a read/write operation on the cartridge chip by using an instruction the same as that used by the print imaging device, or by using a self-defined instruction. In this embodiment, instructions are defined as a device read instruction and a device write instruction. Data of any address in the primary storage area and the backup storage area may be unrestrictedly read or rewritten by using the device read instruction and the device write instruction. The control unit does not control read/write content of the device read instruction and the device write instruction. For example, when the device read instruction instructs to read the address 0x01, data may be directly read from the address, rather than from the corresponding address 0x07 in the backup storage area. This is helpful for production, testing, and debugging.
In the foregoing description, a trigger condition of determining whether data in the backup storage area needs to be updated is a write instruction. In another option, whether data in the backup storage area needs to be updated may be determined according to a preset rule when a read instruction is received.
Specifically, when the received instruction is a read instruction, before executing the read instruction, the control unit determines, according to a preset rule, whether data in the backup storage area needs to be updated. If the data needs to be updated, the read instruction is executed to read the data from the backup storage area after the data in the backup storage area is updated; or data is read from the primary storage area before the data in the backup storage area is updated. If the data does not need to be updated, the read instruction is executed to read the data from the backup storage area after the determining.
Descriptions of determining whether update needs to be performed and an update method are similar to the description of using the write instruction as a trigger condition. Because an instruction received first after the cartridge chip is mounted to the print imaging device is generally a read instruction, and update needs to be performed after a write instruction is received, by using a read instruction as a trigger condition of update, the first received read instruction may not be considered. Alternatively, a first received write instruction is used as a trigger condition of determining update of a read instruction.
To read suitable data according to a received read instruction, in Embodiment 1, a control list is stored in a storage unit to be used as a basis for determining whether information in a backup storage area needs to be updated. This embodiment provides another determining basis, and no control list shown in Embodiment 1 needs to be stored in a storage unit.
As shown in
In this embodiment, a control unit processes a read instruction and a write instruction in the following specific manner:
The control unit is configured to: determine whether a received instruction is a read instruction or a write instruction; and if the received instruction is a write instruction, write, according to an address included in the write instruction, data carried in the write instruction to a location to which the address points in the primary storage area; or
if the received instruction is a read instruction, determine a state of backup data that is in the backup storage area and that corresponds to an address included in the read instruction; and if the backup data is normal data, read the data from a corresponding address in the backup storage area; or if the backup data is abnormal data, read data from the primary storage area according to the address in the read instruction. For example, in this embodiment, when the address included in the read instruction is 0x00, data of the address 0x06 that is in the backup storage area and that corresponds to 0x00 is 0xFF, belonging to the invalid data defined above, that is, the data is abnormal data. In this case, the control unit reads, according to the address 0x00 in the read instruction, data of the address 0x00 in the primary storage area.
When determining the state of the backup data that is in the backup storage area and that corresponds to the address included in the read instruction, it is not necessary to specially determine which address the corresponding address is. An offset may be added to the address in the read instruction, to determine a state of data at the address after the offset. For example, in this embodiment, a difference between each address in the backup storage area and a corresponding address in the primary storage area is 6. Therefore, for example, when the read instruction instructs to read data of the address 0x00, the control unit directly adds an offset 6 to the address 0x00, to obtain the address 0x06, and directly determines a state of the data of the address 0x06. An address corresponding to an address included in the read instruction may also be determined by adding an offset to the original address.
When the control unit determines that the received instruction is a write instruction, after a write operation is completed, the control unit determines, according to a preset rule, whether information in the backup storage area needs to be updated. In this embodiment, the preset rule is:
determining data of each address in the backup storage area, where if the data is normal data, the data does not need to be updated; and if the data is preset first invalid data, where the first invalid data may be 0xAA, the data needs to be updated, and data of a corresponding address in the primary storage area is copied to the backup storage area, to overwrite the first invalid data, that is, to overwrite the 0xAA data; or if the data is preset second invalid data, where the second invalid data may be 0xFF, the data does not need to be processed.
Therefore, assuming that the print imaging device rewrites all addresses in the primary storage area, data of the addresses 0x06 and 0x07 is still the 0xFF data; data of the addresses 0x8 and 0x09 changes to normal data after a first update, so that no more update need to be performed; data of the addresses 0x0A and 0x0B is still the original normal data, the print imaging device can read, when reading the addresses 0x00 and 0x01 according to a read instruction, data that is normally rewritten all the time, and can read data after a first update when reading the addresses 0x02 and 0x03. Data of the corresponding addresses 0x0A and 0x0B in the backup storage area is not changed when the print imaging device reads the addresses 0x04 and 0x05. It can be learned that by using the foregoing initial configuration of the storage unit and the processing on the read instruction and the write instruction, the cartridge chip can not only provide correct data, but also record every write operation previously performed by the print imaging device on each address in the cartridge chip.
Step S20: Determine whether a received instruction is a read instruction or a write instruction. If it is determined that the instruction is a write instruction, in step S21, data carried in the write instruction is written, according to an address included in the write instruction, to a location to which the address points in the primary storage area; or
if the received instruction is a read instruction, in step S22, a state of backup data that is in the backup storage area and that corresponds to an address included in the read instruction is determined. Data stored in the backup storage area may include update configuration data. The update configuration data is used for instructing, when a write instruction and/or a read instruction is received, how to respond to the write instruction and/or the read instruction according to a preset rule. In addition, the data stored in the backup storage area may further include normal data that is the same as data of the addresses in the primary storage area. The update configuration data may include invalid data.
Specifically, when determining the state of the backup data that is in the backup storage area and that corresponds to the address included in the read instruction, if the backup data is normal data, in step S23, the data is read from the backup storage area; or if the backup data is abnormal data, in step S24, data is read from the primary storage area according to the address in the read instruction.
In addition, when the received instruction is a write instruction, after a write operation is completed, in step S25, it is determined, according to a preset rule, whether information in the backup storage area needs to be updated. In this embodiment, the preset rule is:
determining data of each address in the backup storage area, where if the data is normal data, the data does not need to be updated; and if the data is preset first invalid data, where the first invalid data may be 0xAA, the data needs to be updated, and data of a corresponding address in the primary storage area is copied to the backup storage area, to overwrite the first invalid data, that is, to overwrite the 0xAA data; or if the data is preset second invalid data, where the second invalid data may be 0xFF, the data does not need to be processed.
In the foregoing description, a trigger condition of determining whether data in the backup storage area needs to be updated is a write instruction. In another option, whether data in the backup storage area needs to be updated may be determined according to a preset rule when a read instruction is received.
Specifically, when the received instruction is a read instruction, before executing the read instruction, the control unit determines, according to a preset rule, whether data in the backup storage area needs to be updated. If the data needs to be updated, the read instruction is executed to read the data from the backup storage area after the data in the backup storage area is updated; or data is read from the primary storage area before the data in the backup storage area is updated. If the data does not need to be updated, the read instruction is executed to read the data from the backup storage area after the determining.
Descriptions of determining whether update needs to be performed and an update method are similar to the description of using the write instruction as a trigger condition. Because an instruction received first after the cartridge chip is mounted to the print imaging device is generally a read instruction, and update needs to be performed after a write instruction is received, by using a read instruction as a trigger condition of update, the first received read instruction may not be considered. Alternatively, a first received write instruction is used as a trigger condition of determining update of a read instruction.
This embodiment is a variation embodiment of Embodiment 2. In Embodiment 2, whether information in a backup storage area needs to be updated is determined according to a preset rule, that is, according to the information in the backup storage area. In this embodiment, response type information of each address may be stored in a storage unit. In this way, a preset rule may be determined by determining the response type information, thereby knowing how to correctly respond to a received read instruction and write instruction.
Specifically, as shown in
To implement correct processing on a read instruction and a write instruction as Embodiment 3 does, in this embodiment, the following stipulations are performed on the response type information:
Response type K1: Both a read instruction and a write instruction point to the primary storage area.
Response type K2: After a write instruction is executed for the first time, data of a corresponding address in the primary storage area is copied to the backup storage area, and a read instruction points to the backup storage area.
Response type K3: A read instruction points to the backup storage area, and an error signal is replied when a write instruction is received.
Therefore, in this embodiment, a control unit processes a read instruction and a write instruction in the following specific manner:
The control unit is configured to: determine whether a received instruction is a read instruction or a write instruction; and if the received instruction is a write instruction, write, according to an address included in the write instruction, data carried in the write instruction to a location to which the address points in the primary storage area, and determine a response type that corresponds to the address, to perform further processing according to the response type information. For example, in this embodiment, when the address included in the write instruction is 0x04, a corresponding response type in the response storage area is K3, so that the control unit writes, according to the address 0x04 in the write instruction, data to the address 0x04 in the primary storage area and generates an error signal to reply to the print imaging device.
If the received instruction is a read instruction, the control unit determines a response type that is in the response storage area and that corresponds to an address in the read instruction. If the response type is K2 or K3, data of a corresponding address in the backup storage area is read; or if the response type is K1, data is read from the primary storage area according to the address in the read instruction. For example, in this embodiment, when the address included in the read instruction is 0x00, a corresponding response type in the response storage area is K1, so that the control unit reads data of the address 0x00 in the primary storage area according to the address 0x00 in the read instruction.
Response types of data that has other access attributes, for example, data in an increment write (IW) storage area and a one direction write (ODW) storage area described in Embodiment 1, may be respectively set to K4 and K5. K4 and K5 are specifically defined as follows:
Response type K4: When the received instruction is a read instruction, data of an address in the primary storage area is compared with data of a corresponding address in the backup storage area, and the greater data is replied. When the received instruction is a write instruction, the backup storage area is pointed to, and data to be written is compared with data of a corresponding address in the primary storage area. If the data to be written to the backup storage area is smaller, an error signal is replied; or if the data to be written to the backup storage area is greater, the data is synchronous written to the corresponding address in the primary storage area.
Response type K5: Both a read instruction and a write instruction point to the primary storage area. After the write instruction is executed, data that is written to is logically left shifted by 1 bit. When the read instruction is executed, data that is read is logically right shifted by 1 bit, and then a reply is given.
In addition, a cartridge chip needs to perform preset processing when some addresses are accessed. Corresponding response types also need to be set for these addresses. For example, when an address is accessed, the cartridge chip needs to reply with exclusive OR data. In this case, a response type K6 is set for an address that is in the response storage area and that corresponds to the address. A control unit in the cartridge chip performs an exclusive OR operation on data in a storage unit, to obtain exclusive OR data, and then sends the exclusive OR data to the print imaging device. In another example, when an address is accessed, to reply with data generated by using a preset algorithm, the cartridge chip needs to set a corresponding response type for the address, such as a response type K7. The control unit generates data of the address according to the response type and by using the preset algorithm. Because an address that is in the backup storage area and that corresponds to an address storing the response type information K7 in the response storage area does not need to store valid normal data, invalid data such as the foregoing 0xFF can be stored.
In another feasible option, after the response storage area is added, in this embodiment, information such as the 0xFF data and the 0xAA data in the backup storage area 520 in
In the foregoing embodiments, a space having a substantially same size as that of a space of a primary storage area needs to be configured for a backup storage area, so that compared with a cartridge chip in the prior art, a memory having a capacity of at least two times that of a memory in the cartridge chip in the prior art needs to be provided. This is not helpful for reducing costs of a cartridge chip.
This embodiment provides another cartridge chip. In a storage unit of the cartridge chip, an address that is in a backup storage area and that corresponds to a primary storage area is optionally configured, thereby reducing a space of the backup storage area. As shown in
Backup data corresponding to data in the storage area having an original access attribute RW may be selected not to be set. According to an actual requirement, backup data corresponding to data in a storage area having another access attribute may alternatively be selected not to be set. For example, when the primary storage area further stores digital signature information, the digital signature information usually occupies a large part of the data space, and the digital signature is generally used for authentication instead of recording a state of the cartridge chip. Therefore, the digital signature information may be selected not to be backed up. In this way, the storage space in the backup storage area is saved.
In this embodiment, a control unit is configured to process a read instruction and a write instruction received by an interface unit. Specifically, the control unit is configured to: determine whether the received instruction is a read instruction or a write instruction, and if the received instruction is a write instruction, write, according to an address included in the write instruction, data carried in the write instruction to a location to which the address points in the primary storage area; or
if the received instruction is a read instruction, determine whether there is backup data that is in the backup storage area and that corresponds to an address included in the read instruction; and if there is backup data, read the data from the backup storage area; or if there is no backup data, read data from the primary storage area according to the address in the read instruction.
In this embodiment, because the addresses in the backup storage area 420 are not in a one-to-one correspondence with addresses in the primary storage area 410, and the backup storage area 420 only backs up data of the addresses 0x02 to 0x05 in the primary storage area 410. Therefore, when determining that the received instruction is a read instruction, if the addresses are 0x02 to 0x05, the control unit reads data from the backup storage area, and then returns the data to a print imaging device through the interface unit; or if the addresses are 0x00 and 0x01, because there is no backup data in the backup storage area, the control unit reads data of the addresses in the primary storage area according to the addresses in the read instruction.
It should be noted that, in this embodiment, because 0xAA is initially configured and stored at the addresses 0x06 and 0x07 that correspond to a storage area having an original access attribute WO, if the addresses 0x06 and 0x07 in the backup storage area are directly read when the addresses to be read are 0x02 and 0x03, invalid data such as 0xAA may be sent out. Therefore, in the foregoing step, when determining whether there is backup data that is in the backup storage area and that corresponds to the address included in the read instruction, a state of the backup data needs to be further determined. If the state of the backup data is invalid data, the control unit reads data of the address in the primary storage area according to the address in the read instruction, and reads data from the backup storage area only when the state of the backup data is normal data. Because 0xAA is initially configured and stored at the addresses 0x06 and 0x07 that correspond to the storage area having an original access attribute WO, the data of the addresses needs to be updated once before becoming normal data. The following describes how to update the data in the backup storage area.
When the received instruction is a write instruction, after a write operation is completed, the control unit determines, according to a preset rule, whether data in the backup storage area needs to be updated.
In this embodiment, the preset rule is: determining data of each address in the backup storage area. If the data is normal data, the data does not need to be updated; or if the data is preset first invalid data, where the first invalid data may be 0xAA, the data needs to be updated, and data of a corresponding address in the primary storage area is copied to the backup storage area, to overwrite the first invalid data, that is, to overwrite the 0xAA data.
Step S30: Determine whether a received instruction is a read instruction or a write instruction. If it is determined that the instruction is a write instruction, in step S31, data carried in the write instruction is written, according to an address included in the write instruction, to a location to which the address points in the primary storage area; or
if the received instruction is a read instruction, in step S32, it is determined whether there is backup data that is in the backup storage area and that corresponds to an address included in the read instruction. If there is backup data, in step S33, a state of the corresponding backup data in the backup storage area is determined. If the backup data is normal data, in step S35, the data is read from the backup storage area; or if the backup data is abnormal data, or it is determined in step S32 that there is no corresponding backup data in the backup storage area, in step S34, data is read from the primary storage area according to the address in the read instruction.
In addition, when the received instruction is a write instruction, after a write operation is completed, in step S36, it is determined, according to a preset rule, whether data in the backup storage area needs to be updated is determined. In this embodiment, the preset rule is:
determining data of each address in the backup storage area. If the data is normal data, the data does not need to be updated; or if the data is preset first invalid data, where the first invalid data may be 0xAA, the data needs to be updated, and data of a corresponding address in the primary storage area is copied to the backup storage area, to overwrite the first invalid data, that is, to overwrite the 0xAA data.
In the foregoing description, a trigger condition of determining whether data in the backup storage area needs to be updated is a write instruction. In another option, whether data in the backup storage area needs to be updated may be determined according to a preset rule when a read instruction is received.
Specifically, when the received instruction is a read instruction, before executing the read instruction, the control unit determines, according to a preset rule, whether data in the backup storage area needs to be updated. If the data needs to be updated, the read instruction is executed to read the data from the backup storage area after the data in the backup storage area is updated; or data is read from the primary storage area before the data in the backup storage area is updated. If the data does not need to be updated, the read instruction is executed to read the data from the backup storage area after the determining.
Descriptions of determining whether update needs to be performed and an update method are similar to the description of using the write instruction as a trigger condition. Because an instruction received first after the cartridge chip is mounted to the print imaging device is generally a read instruction, and update needs to be performed after a write instruction is received, by using a read instruction as a trigger condition of update, the first received read instruction may not be considered. Alternatively, a first received write instruction is used as a trigger condition of determining update of a read instruction.
In the foregoing description of this embodiment, the control unit determines whether the data in the backup storage area needs to be updated and how to be updated according to the data stored in the backup storage area. In an optional manner, a response storage area described in Embodiment 3 may be set in the storage unit. The response storage area records how each address in the primary storage area should respond, so that data used for controlling data update such as the first invalid data 0xAA in this embodiment does not need to be stored at an address that is in the backup storage area and that corresponds to the primary storage area. In this way, the storage space in the storage unit is further saved.
The present invention further provides a consumable cartridge. The cartridge chip according to any of the foregoing embodiments is detachably mounted to the consumable cartridge.
Variant Embodiments
1. The foregoing interface unit, the control unit, and the storage unit may be integrally set on a same electronic circuit, and are manufactured by means of an application-specific integrated circuit (ASIC) process. The electronic circuit may be set on a circuit board. In addition, the foregoing units may be specifically implemented by using a microprogrammed control unit or micro control unit (MCU). Alternatively, a CPU is set in the control unit and the functions of the control unit are implemented by the CPU by executing program code. That is, the present invention provides a cartridge chip. The cartridge chip includes a processor. The processor may be the foregoing MCU or CPU. The processor may be configured to execute program code, to implement the data processing method for a cartridge chip in the foregoing embodiments.
2. Data stored in the storage unit may be divided into program data and application data according to the use of the data. The program data is executable software program code, and is generally data not accessible by a user. The program data is executed by the control unit in the cartridge chip. Specifically, the software program code may be executed by the MCU or CPU included in the cartridge chip, to control the method and the implement functions in the foregoing embodiments. That is, the present invention provides a storage medium. The storage medium stores program code. The program code may be used for implementing the data processing method for a cartridge chip in the foregoing embodiments. The application data is data accessible by a user and can be read by a print imaging device, such as the data stored at the addresses listed in the embodiments of
3. To prevent information in the cartridge chip from being improperly obtained and used, the present invention may further encrypt the data in the storage unit. In one method, when a write instruction is received, data of each address is processed by the control unit in the cartridge chip according to a preset coding manner or encryption algorithm before being stored, and then is stored at (written to) a corresponding address. When the data of the address needs to be read according to a read instruction, the control unit inversely decodes or decrypts the read data, and then returns the data to a reading device or to a print imaging device through an interface unit. For example, an address 0x00 is supposed to store data 0x01. A coding algorithm adds 1 to each data, so that when writing data to the address 0x00, the control unit adds 1 to the data “0x01”, to obtain “0x02”, and then writes 0x02 to the address 0x00. When the read instruction instructs to read data of the address, the control unit first reads the data “0x02”, and then uses an inverse decoding algorithm of subtracting 1, to obtain “0x01”, and then returns 0x01 to a corresponding reading device through the interface unit. After encryption is performed, all data in the storage unit is encrypted data and belongs to an “encrypted data storage area” if divided according to areas.
4. It is described in the foregoing embodiments that, when a received instruction is a write instruction, after a write operation is completed, the control unit determines, according to a preset rule, whether information in the backup storage area needs to be updated. Further, when a determining result is that the data in the backup storage area does not need to be updated, the control unit may generate an error reply signal and send the signal to the print imaging device through the interface unit, to inform the print imaging device that the previously sent write instruction is abnormal.
5. In the foregoing embodiments, the addresses in the backup storage area immediately follow addresses in the primary storage area and are consecutive. A person skilled in the art may understand that the addresses in the backup storage area may alternatively be nonconsecutive with the addresses in the primary storage area, and the addresses in the backup storage area may alternatively be nonconsecutive. When the addressing manner is changed, the preset rule is correspondingly modified.
Finally, it should be noted that the foregoing embodiments are merely intended for describing the technical solutions of the present invention but not for limiting the present invention. Although the present invention is described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand that they may still make modifications to the technical solutions described in the foregoing embodiments or make equivalent replacements to some or all technical features thereof, without departing from the scope of the technical solutions of the embodiments of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201610849245.0 | Sep 2016 | CN | national |
This application is a continuation of PCT Patent Application No. PCT/CN2017/101715, filed on Sep. 14, 2017, which claims priority to Chinese Patent Application No. 201610849245.0, filed with the Chinese Patent Office on Sep. 23, 2016 and entitled “DATA PROCESSING METHOD AND CARTRIDGE CHIP USING SAME”, which is incorporated herein by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2017/101715 | Sep 2017 | US |
| Child | 16106781 | US |
