JPH04154246A - Backup method by system common memory for device information - Google Patents

Abstract

PURPOSE:To make it possible to back up device information in online mode using system common memory by installing a device where system common memory made of non-volatile memory is built in. CONSTITUTION:The present system common memory built-in device consists of a communication control processing section 3, a command analysis processing section 4, a device control section 5, a system common memory section 7 made of nonvolatile memory for storing device information, and a system common memory processing section 6 for processing the system common memory 7. Thus, by using the system common memory 7 to back up device information, device information such as recording reservation for VTR of a device having no built-in non-volatile memory 7 remains as it is even in the case electric service interrupt occurs, thereby eliminating the necessity of re-setting device information.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention provides a method in which a plurality of devices each having a built-in communication control processing section,
In communication systems that are interconnected via the communication control processing unit, configure devices with built-in system shared memory, devices with built-in system shared memory command processing unit, memory status request command, memory status response command, memory area allocation request command K Memory area allocation You can share the system online by using the response command, memory content write request command, memory content write response command, memory content read request command, memory content read response command, memory area release request command, and memory area release response command. The present invention relates to a system for backing up device information using a system shared memory, which backs up device information to memory.

2. Description of the Related Art A block diagram of an embodiment of a conventional communication system is shown in FIG. In FIG. 11, 20 is a conventional device with a built-in nonvolatile memory 21, and 22 is a conventional device without a built-in nonvolatile memory, which are connected to the transmission line 19.

Fig. 12 (mi) shows a block diagram showing the configuration of a conventional device with a built-in nonvolatile memory. In Fig. 12, 23 is a transmission path, 24 is a conventional device with a built-in nonvolatile memory, and a communication control processing unit. 25, command analysis processing unit 26,
It is composed of a device control section 27 and a nonvolatile memory 28.

FIG. 13 shows a block diagram showing the configuration of a conventional device that does not include a built-in nonvolatile memory. In Figure 13, 29
30 is a transmission path, and 30 is a conventional device that does not have a built-in nonvolatile memory, and is composed of a communication control processing section 31, a command analysis processing section 32, and a device control section 33. A state change diagram of a conventional device 20 with a built-in non-volatile memory and a conventional device 21, 22 without a built-in non-volatile memory when an occurrence occurs is shown. 11th Doctor 12th Doctor 13th @ In Fig. 14, a conventional device 20 with built-in nonvolatile memory connected to the transmission line and conventional devices 21 and 2 without built-in nonvolatile memory are shown.
2 Device information For example, a power outage occurred after setting the VTR recording reservation or home telephone speed dial (Information setting 203, Information setting 204, Information setting 205).
Power outage occurred 301) tl, The device information of the conventional device 20 with built-in non-volatile memory remains, but the device information of the conventional devices 21 and 22 without built-in non-volatile memory disappears (\Reset device information ( Information resetting 206, information resetting 207) In addition, in conventional devices 20 with built-in nonvolatile memory, it is rare that the entire usable area of the nonvolatile memory 28 is effectively used. In a communication system where there are a large number of devices that require non-volatile memory 28, it would be extremely costly and uneconomical to incorporate non-volatile memory 28 into each device that requires non-volatile memory 28. Problems to be Solved by the Invention In conventional communication systems, device information such as VTR recording reservations for conventional devices that do not have built-in non-volatile memory is
It disappeared when a power outage occurred.1. X.

In a communication system where there are many devices that require non-volatile memory, it is necessary to incorporate non-volatile memory into all devices that require non-volatile memory. Means for Solving the Problems That Are High in Cost and Not Economical The present invention provides a means for solving problems that are costly and uneconomical. Configure a device with a built-in system shared memory to configure a device with a built-in system shared memory command processing module.Memory status request command Memory status response command Memory area allocation request command, memory area allocation response command, memory content write request command,
A system that backs up device information to the system shared memory online by using the memory content write response command, memory content read request command, memory content read response command, memory area release request command, and memory area release response command. The device information is backed up using shared memory.

Effect of the present invention: By using the device information backup method using the system shared memory described above, device information such as recording reservations for VTRs of devices that do not have built-in non-volatile memory remains even in the event of a power outage, and there is no need to reset the device information. Also, in communication systems where there are a large number of devices that require non-volatile memory, it is no longer necessary to include non-volatile memory in every device that requires non-volatile memory.
A detailed explanation of the present invention will be given below as an example in which a communication system can be constructed at low cost and is very economical. In Figure 1, which is a block diagram showing the configuration of a device with built-in memory, 1
is the transmission path, and 2 is the device with built-in system shared memory.
A system shared memory consisting of a communication control processing unit 3 that communicates according to a predetermined communication protocol, a command analysis processing unit 4 that analyzes received commands, a device control unit 5 that controls devices, and a nonvolatile memory that stores device information. 7, and a system shared memory processing section 6 that processes the system shared memory 7. In FIG. 2, which is a block diagram showing the configuration, 8 is a transmission path, 9 is a device with a built-in system shared memory command analysis processing section, a communication control processing section 10 that communicates according to a predetermined communication protocol, and a received command. The system includes a command analysis processing section 11 that analyzes commands, a device control section 12 that controls devices, and a system shared memory command processing section 13 that processes commands of the system shared memory. FIG. 3 ζ Memory status request command of the present invention when backing up device information using system shared memory Memory status response command,
In Figure 3, which is a message structure diagram of the memory area allocation request command and the memory area allocation response command, the device address (DA) and subdevice address of the device whose usage status of the system shared memory is to be ascertained are used as operands of the memory status request command. (SDA), and specify the device address (DA) of the device with built-in system shared memory and the memory size of the system shared memory as the operand of the memory status response command.The device that you want to use the system shared memory as the operand of the memory area allocation request command. device address (DA), sub device address (SDA)
) and the requested memory size of the system shared memory, and the device address (DA) of the device with built-in system shared memory as the operand of the memory area allocation response command.
, an indicator for permitting/disallowing allocation of system shared memory, and a memory size to be allowed when allocation of system shared memory is permitted. This is a message structure diagram of the memory content write request command, the memory content read request command, and the memory content read response command. Specify the device address (DA), sub-device address (SDA), write ID information, read ID information, data write start address, and write data of the device to which you want to write information.
As operands of the memory contents write response command, specify the device address (DA) of the device with built-in system shared memory, the write completion/write disable indicator to the system shared memory, and the reason for failure when writing to the system shared memory is not possible.Memory contents Specify the device address (DA), sub-device address (SDA), data read start address, and read ratio data size of the device whose device information you want to read from the system shared memory as operands of the read request command, and send the system as the operands of the memory content read response. Device address of device with built-in shared memory (
DA), specifies an indicator of whether or not reading from the system shared memory is possible, read data when reading from the system shared memory is possible, or a reason for not being able to read from the system shared memory.

Figure 5 (back side) is a message structure diagram of the memory area release request command and memory area release response command of the present invention when backing up device information using the system shared memory.
In Figure 5, the device address (DA) and subdevice address (DA) of the device whose use of system shared memory is to be stopped are used as operands of the memory area release request command.
SDA) and system shared memory release request memory size, and as operands of the memory area release response command, the device address (DA) of the device with built-in system shared memory, system shared memory release permission/disapproval indicator, and system shared memory. In Figure 5, the message format used is the home bus system (H
This uses the CT system command extension of BS), where PR is the priority code, SA is the self address, DA is the other party's address, CC is the control code, BC is the message length code, HD is the header, SA' is the self subaddress, and DA' is the self address. Partner subaddress X 5SDA is self subdevice address D
SDA is the destination subdevice address TS is the table select address OPC is the operation code, OPR is the operand, MC is the manufacturer code, ○PC' is the operation code of the original command, OPR' is the operand of the original command, TC is the termination code, FCC
indicates a check code, DMY indicates a dummy, and ACK/NAK indicates an ACK/NAK code.

FIG. 9 is a memory map diagram showing an example of memory area allocation of the system shared memory 7 shown in FIG. 1. In FIG. 9, 100 is a large system shared memory 101
is the dedicated memory area of the device with built-in system shared memory 10
2 is a system shared memory management tape /l/ that stores information for managing the system shared memory; 103 is a system shared memory area; FIG. 10 shows the system shared memory built-in device 2 shown in FIG. 1;
14 is a block diagram of an embodiment of a communication system when backing up device information using the system shared memory using the system shared memory command processing unit built-in device 9 shown in FIG. 15 is a device with built-in system shared memory 16, I7
, 18 are devices with a built-in system shared memory command processing unit No. 6 @ 7 @ Fig. 8 are devices 15 with a built-in system shared memory of the present invention shown in FIG. , 18, the memory status request command, memory status response command, memory area allocation request command, memory area' allocation response command of the present invention shown in FIG. The system is shared using the memory content write request command, memory content write response command, memory content read request command, memory content read response command, and the memory area release request command and memory area release response command of the present invention shown in FIG. FIG. 3 is a communication sequence diagram when backing up device information using a memory. In Figure 6, al), a2),
a3) are system shared memory command processing unit built-in devices 16 and 17, and 18 to system shared memory built-in device 1, respectively.
Memory status request command sent to 5, bl)
, b2), and b3) are from the system shared memory built-in device 15 to the system shared memory command processing unit built-in device 1, respectively.
The memory status response commands cl), c2), and c3) sent to devices 6, 17, and 18 are sent from devices 16, 17, and 18 with built-in system shared memory command processing units to device 15 with built-in system shared memory, respectively. The memory area allocation request commands di), d2), and d3) are memory area allocation response commands sent from the system shared memory built-in device 15 to the system shared memory command processing unit built-in devices 16, 17, and 18, respectively. be.

In FIG. 7, el), e2), and e3) are devices 16 and 17 with built-in system shared memory command processing units, respectively.
, 18 to the device 15 with built-in system shared memory, a memory content write request command, fl), f2
), f3) are the system shared memory built-in device 15 to the system shared memory command processing unit built-in device 16, 1, respectively.
The memory content write response commands ", gl), g2) and g3) sent to devices 7 and 18 are sent from devices 16, 17, and 18 with built-in system shared memory command processing units to device 15 with built-in system shared memory, respectively. The memory content read request commands hl), h2), and h3) are memory content read response commands sent from the system shared memory built-in device 15 to the system shared memory command processing unit built-in devices 16, 17, and 18, respectively. In FIG. 8, il), i2), and i3) are memory area release request commands sent from the system shared memory command processing unit built-in devices 16, 17, and 18 to the system shared memory built-in device 15, respectively. ), j2),
j3) respectively from the system shared memory built-in device 15 to the system shared memory command processing unit built-in devices 16, 17, 1.
This is the memory area release response command sent to 8. Device with built-in system shared memory according to an embodiment of the present invention Device with built-in system shared memory command processing unit, memory status request command, memory status response command, memory area Using the allocation request command, memory area allocation response command, memory content write request command, memory content write response command, memory content read request command, memory content read response command, memory area release request command, memory area release response command. , when backing up device information to the system shared memory online, the operation is described below.
Fig. 5 Fig. 6 @ 7th doctor 8m Fig. 9 @ Explained using Fig. 1θ In Fig. 6, devices 16, 17, and 18 with built-in system shared memory command processing units whose usage status of system shared memory is to be grasped are shown. A memory status request command in the message format shown in FIG. 3 is sent to each system shared memory built-in device 15 al), a2), a3
) to send. Memory status request command al), a2)
, a3), the system shared memory processing unit 6 shown in FIG. 1 grasps the usage status of the system shared memory 7 using the system shared memory management table 102 shown in FIG. Devices 16, 1 with a built-in system shared memory command processing unit that send the memory status request commands al), a2), and a3)
System shared memory command processing that receives memory status response commands bl), b2), b3) in the message format shown in Figure 3 to 7 and 18. Built-in equipment 16
, 17, 181 e The system shared memory command processing unit 13 shown in FIG. 2 grasps the usage status of the system shared memory.
Memory area allocation request command c in the message format shown in FIG. 3 for each system shared memory built-in device 15
l), c2), c3) The system shared memory built-in device 15fi that received the memory area allocation request commands cl), c2), c3) The system shared memory processing unit 6 shown in FIG. The memory area allocation of 7 is based on the system shared memory management table 102 shown in FIG. 17,
Memory area allocation response commands di), d2), d3) in the message format shown in Figure 3 are sent to 18. Memory area allocation response commands di), d2), d
3), the devices 16, 17, and 18 with built-in system shared memory command processing units each check the allocation status of the system shared memory in the system shared memory command processing unit 13 shown in FIG. 2. , system shared memory command processing unit built-in devices 16, 17, 18
Set device information such as recording reservation and speed dial for each VTR (information settings 200, 201, 202). Devices with built-in system shared memory command processing unit 16, 17, 18 (table 1) to write device information to the mourning system shared memory
A memory content write request command e in the message format shown in FIG. 4 is sent to each system shared memory built-in device 15.
After receiving the memory content write request commands el), e2), and e3), the system shared memory built-in device 15 sends the system shared memory processing unit 6 shown in FIG. The system' writes device information to the shared memory 7 based on the system shared memory management table 102 shown in FIG. Shared memory command processing unit built-in devices 16, 17,
Send memory content write response commands fl), f2), f3) in the message format shown in FIG. 4 to 18a Memory content write response commands fl), f2),
Each of the devices 16, 17, and 18 with a built-in system shared memory command processing unit that received f3) grasps the writing status of device information to the system shared memory in the system shared memory command processing unit 13 shown in FIG. At the time of occurrence (power outage occurrence 300), devices 16, 17 with built-in system shared memory command processing units that want to read device information such as VTR recording reservations and speed dials from the system shared memory.
No. 18 Send memory content read request commands gl), g2), g3) in the message format shown in Figure 4 to each system shared memory built-in device 15 Memory content read request commands gl), g2), g3) The system shared memory built-in device 15 that has received the system shared memory processing unit 6 shown in FIG. 1 reads the device information from the system shared memory 7 based on the system shared memory management table 102 shown in FIG. Devices 16, 17 with built-in system shared memory command processing units that are the senders of the memory content read request commands gl), g2), and g3), respectively;
18, the system shared memory command processing unit receives the memory content read response commands hl), h2), h3) in the message format shown in FIG. 4. Built-in device 1
6, 17, and 187. In each case, the system shared memory command processing unit 13 shown in FIG. 2 grasps the device information from the system shared memory. The processing unit built-in devices 16, 17, and 18 lines respectively send memory area release request commands in the message format shown in FIG. 5 to the system shared memory built-in devices 15 (il), i2),
i3) Send memory area release request command il)
, 12), i3) is received, the system shared memory built-in device 154;L releases the memory area of the system shared memory 7 in the system shared memory processing unit 6 shown in FIG. 1.0
2, each memory area release request command i
Send memory area release response commands jl), j2), j3) in the message format shown in Figure 5 to the devices 16, 17, and 18 with built-in system shared memory command processing units that are the senders of l), i2), and 3). Send Device with built-in system shared memory command processing unit that received the memory area release response command jl), j2), j3)
, 18ζ friends respectively grasp the release status of the system shared memory in the system shared memory command processing unit 13 shown in FIG. Device information, such as the This eliminates the need for each device to have built-in non-volatile memory, making it possible to build communication systems at low cost.

[Brief explanation of drawings]

FIG. 1 CL is a block diagram showing the configuration of a system-shared memory built-in device according to an embodiment of the present invention.
Block diagram showing the configuration of the device with built-in system shared memory command analysis processing unit of the embodiment No. 3 @ Fig. 4 and Fig. 5
The figure shows the 6th plate of the message composing doctor for various commands of the present invention.
7 and 8 are communication sequence diagrams according to the present invention. FIG. 9 is a memory map diagram showing an example of memory area allocation of the system shared memory 7 shown in FIG. 1. Example block doctor 1st
Figure 1 is a block diagram of a conventional communication system.Figure 12 is a block diagram showing the configuration of a conventional device with built-in non-volatile memory. Figure 14 is a state change diagram of conventional equipment with built-in non-volatile memory and conventional equipment without built-in non-volatile memory when a power outage occurs in a conventional communication system. .29... Transmission factory 2, 15... Device with built-in system shared memory 3゜10
, 25. 31... Communication control processing a4, 11, 2
6. 32...Command analysis processing ff1L 5゜1
2, 27. 33---Equipment control nW, 6---System shared memory processing 7...System shared memory,
9. 16. 17. 18...Name of agent for equipment with built-in system shared memory command processing unit Patent attorney Osamu Koebi Akira Akira 2nd name Ku Nukago "..." Figure 14

Claims (3)

[Claims] (1) In a communication system in which devices with a built-in communication control processing unit are interconnected via the communication control processing unit, set the device with a built-in system shared memory consisting of non-volatile memory, and The device that wants to know the usage status transmits a memory status request command to inquire about the usage status of the system shared memory to the device with the built-in system shared memory, and the device with the built-in system shared memory that receives the memory status request command, A memory status response command notifying the usage status of the system shared memory is sent to the device that sent the memory status request command, and the device that wants to use the system shared memory requests the device with built-in system shared memory to The device with built-in system shared memory that has received the memory area allocation request command sends a memory area allocation request command requesting the allocation of the system shared memory, and the device with built-in system shared memory that has received the memory area allocation request command sends a request to the device that sent the memory area allocation request command. , sends a memory area allocation response command that notifies the memory area allocation status of the system shared memory, and the device that wants to write device information to the system shared memory sends the system shared memory built-in device a memory area allocation response command to notify the system shared memory memory area allocation status. The device with built-in system shared memory that has sent a memory content write request command requesting writing and received the memory content write request command sends the following information to the device that sent the memory content write request command:
A device that sends a memory content write response command that notifies the status of device information writing to the system shared memory, and wants to read device information from the system shared memory, sends a message from the system shared memory to the device with built-in system shared memory. The device with built-in system shared memory transmits a memory content read request command requesting to read the memory content, and upon receiving the memory content read request command, the system shared memory built-in device requests the device from which the memory content read request command is sent to read the system shared memory. A device that sends a memory content read response command that notifies the status of reading device information from a memory area that requests the device with built-in system shared memory to release the system shared memory. Send a release request command,
The system shared memory built-in device that has received the memory area release request command sends a memory area release response command that notifies the device that sent the memory area release request command of the memory area release status of the system shared memory. A method for backing up device information using a system shared memory, characterized in that device information can be backed up to the system shared memory online by sending the data. (2) In the communication system in which devices having built-in communication control processing units are interconnected via the communication control processing unit, a communication control processing unit that communicates according to a predetermined communication protocol, and a device control that controls the devices. a command analysis processing section that analyzes received commands, a system shared memory consisting of a non-volatile memory that stores device information, and a system shared memory processing section that processes the system shared memory and receives a memory status request command. At this time, the command analysis processing unit analyzes the memory status request command, the system shared memory processing unit grasps the memory usage status of the system shared memory, and the memory usage status is used as the memory usage status response command. When the memory area allocation request command is received, the memory area allocation request command is analyzed by the command analysis processing unit and sent to the system shared memory processing unit. allocates the system shared memory, sends the memory allocation status as the memory area allocation response command to the device that sent the memory area allocation request command, and upon receiving the memory content write request command, the command The analysis processing unit analyzes the memory content write request command, the system shared memory processing unit writes device information to the system shared memory, and the writing status of the device information is transmitted to the memory content write response command. When the memory content read request command is received, the command analysis processing unit analyzes the memory content read request command, and performs the system shared memory processing. reads device information from the system shared memory at the
The read status of device information is sent as the memory content read response command to the device that is the source of the memory content read request command, and when the memory area release request command is received, the command analysis processing unit issues the memory area release request. Analyzing the command, freeing the system shared memory in the system shared memory processing unit, and transmitting the memory release status as the memory area release response command to the device that sent the memory area release request command. A device with a built-in system shared memory featuring: (3) In the communication system in which devices including communication control processing units are interconnected via the communication control processing unit, the communication control processing unit performs communication according to a predetermined communication protocol, and the communication control processing unit controls the devices. A device control unit, a command analysis processing unit that analyzes received commands, and a system shared memory command processing unit that processes commands of the system shared memory, and when it is desired to grasp the usage status of the system shared memory,
When transmitting the memory status request command and receiving the memory status response command in response to the memory status request command, the command analysis processing unit analyzes the memory status response command, and the system shared memory command processing unit analyzes the memory status response command. , when grasping the usage status of the system shared memory and wishing to use the system shared memory, transmitting the memory area allocation request command; and upon receiving the memory area allocation response command to the memory area allocation request command, transmitting the command; The analysis processing unit analyzes the memory area allocation response command, the system shared memory command processing unit grasps the memory area allocation status of the system shared memory, and when it is desired to write device information to the system shared memory. , when transmitting the memory content write request command and receiving the memory content write response command in response to the memory content write request command, the command analysis processing unit analyzes the memory content write response command; The system shared memory command processing unit grasps the writing status of device information to the system shared memory, and when it wants to read device information from the system shared memory, transmits the memory content read request command and reads the memory content. When receiving the memory content read response command in response to the request command, the command analysis processing unit analyzes the memory content read response command, and the system shared memory command processing unit reads device information from the system shared memory. Understand the situation and
When you want to end the use of the system shared memory, you send the memory area release request command, and when you receive the memory area release response command in response to the memory area release request command, the command analysis processing unit generates the memory area release response. A device with a built-in system shared memory command processing unit, characterized in that a command is analyzed, and the system shared memory command processing unit grasps a memory area release status of the system shared memory.