CN112269564A - OTP ROM programming method and system - Google Patents
OTP ROM programming method and system Download PDFInfo
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- CN112269564A CN112269564A CN202011149460.2A CN202011149460A CN112269564A CN 112269564 A CN112269564 A CN 112269564A CN 202011149460 A CN202011149460 A CN 202011149460A CN 112269564 A CN112269564 A CN 112269564A
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Abstract
The application discloses a method and a system for programming OTP ROM, wherein the method comprises the following steps: receiving a programming start enabling signal written into a programming enabling register pre-mounted on an external bus by a user terminal; acquiring programming configuration information written into a programming configuration register which is pre-loaded on the external bus by the user terminal; and programming the OTP ROM according to the programming configuration information, and receiving a programming closing enabling signal written in the programming enabling register after the programming process of the user terminal is finished. Therefore, the OTP ROM is specifically programmed through the register, so that the space of the OTP ROM does not occupy the address space of an external bus, the programming complexity can be improved, repeated writing and misoperation on the OTP ROM can be effectively avoided, and the OTP ROM and original data in the OTP ROM are protected from being damaged.
Description
Technical Field
The present application relates to the field of computer technology, and more particularly, to a method and system for programming OTP ROM.
Background
Embedded OTP ROMs (One time programmable ROMs) used in integrated circuit design are generally provided by back-end vendors. The OTP ROM provided by a back-end manufacturer is provided with a control interface, a data interface and an address interface, and an external bus can be directly accessed to the interfaces so as to read or program the OTP ROM. In the conventional technology, a control bus, a data bus and an address bus of an external bus are usually directly connected to corresponding bus interfaces of an OTP ROM, an address space of the OTP ROM is directly placed in the bus address space, and if a user writes the bus address space, data in the OTP ROM may be repeatedly written to cause damage to the OTP ROM and cause loss of original data in the OTP ROM.
Therefore, how to solve the above problems is a great concern for those skilled in the art.
Disclosure of Invention
The application aims to provide an OTP ROM programming method and system, which improve programming complexity of the OTP ROM and effectively avoid repeated writing and misoperation of the OTP ROM so as to avoid damage to the OTP ROM or loss of original data.
To achieve the above object, the present application provides an OTP ROM programming method including:
receiving a programming start enabling signal written into a programming enabling register pre-mounted on an external bus by a user terminal;
acquiring programming configuration information written into a programming configuration register which is pre-loaded on the external bus by the user terminal;
and programming the OTP ROM according to the programming configuration information, and receiving a programming closing enabling signal written in the programming enabling register after the programming process of the user terminal is finished.
Optionally, the programming configuration register includes an OTP address register, an OTP data input register, an OTP data output register, and an OTP read/write command register.
Optionally, the obtaining of the programming configuration information written by the user terminal into the programming configuration register pre-loaded on the external bus includes:
acquiring configuration data written into the OTP data input register by the user terminal;
acquiring an OTP address port written into the OTP address register by the user terminal;
and acquiring the read-write command written into the OTP read-write command register by the user terminal.
Optionally, the programming the OTP ROM according to the programming configuration information includes:
if the obtained read-write command is a read command for the OTP ROM, obtaining the configuration data from the OTP data input register;
storing the configuration data in the OTP data output register to read the configuration data in the OTP data output register via the external bus.
Optionally, the programming the OTP ROM according to the programming configuration information includes:
if the obtained read-write command is a programming instruction for an OTP ROM, sending the configuration data in the OTP data input register to a data input port of the OTP ROM;
sending data in the OTP address register to an address port of the OTP ROM.
Optionally, the method further includes:
after receiving the programming configuration information written by the user terminal, acquiring an enabling state of the programming enabling register;
if the enabling state is a programming-allowed state, directly programming the OTP ROM according to the programming configuration information;
and if the enabling state is a program-inhibited state, inhibiting the OTP ROM from being programmed according to the programming configuration information, and returning prompt information which cannot be rewritten to the user terminal.
To achieve the above object, the present application provides an OTP ROM programming system comprising:
the first enabling module is used for receiving a programming starting enabling signal written into a programming enabling register which is mounted on an external bus in advance by a user terminal;
the configuration acquisition module is used for acquiring programming configuration information written into a programming configuration register which is pre-loaded on the external bus by the user terminal;
and the second enabling module is used for programming the OTP ROM according to the programming configuration information and receiving a programming closing enabling signal written into the programming enabling register after the programming process of the user terminal is finished.
Optionally, the method further includes:
a state obtaining module, configured to obtain an enable state of the programming enable register after receiving the programming configuration information written by the user terminal;
the programming execution module is used for directly programming the OTP ROM according to the programming configuration information if the enabling state is a programming-allowed state;
and the programming inhibition module is used for inhibiting the OTP ROM from being programmed according to the programming configuration information and returning prompt information which cannot be rewritten to the user terminal if the enabling state is a programming inhibition state.
Optionally, the programming configuration register includes an OTP address register, an OTP data input register, an OTP data output register, and an OTP read/write command register.
Optionally, the configuration obtaining module includes:
a first obtaining unit, configured to obtain configuration data written by the user terminal into the OTP data input register;
a second obtaining unit, configured to obtain an OTP address port written into the OTP address register by the user terminal;
and the third acquisition unit is used for acquiring the read-write command written into the OTP read-write command register by the user terminal.
According to the scheme, the OTP ROM programming method provided by the application comprises the following steps: receiving a programming start enabling signal written into a programming enabling register pre-mounted on an external bus by a user terminal; acquiring programming configuration information written into a programming configuration register which is pre-loaded on the external bus by the user terminal; and programming the OTP ROM according to the programming configuration information, and receiving a programming closing enabling signal written in the programming enabling register after the programming process of the user terminal is finished. Therefore, the OTP ROM is specifically programmed through the register, so that the space of the OTP ROM does not occupy the address space of an external bus, the programming complexity of the OTP ROM can be improved, repeated writing and misoperation on the OTP ROM can be effectively avoided, and the OTP ROM and original data in the OTP ROM can be protected from being damaged.
The application also discloses an OTP ROM programming system which can achieve the technical effects.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart of a method for programming an OTP ROM according to an embodiment of the disclosure;
fig. 2 is a block diagram of an OTP ROM programming system according to an embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the related art, the control bus, the data bus and the address bus of the external bus are usually directly connected to the corresponding bus interface of the OTP ROM, the address space of the OTP ROM is directly placed in the bus address space, and if a user writes the bus address space, the data in the OTP ROM may be repeatedly written to cause damage to the OTP ROM and also cause loss of original data in the OTP ROM.
Therefore, the embodiment of the application discloses an OTP ROM programming method, which improves the programming complexity of the OTP ROM, and effectively avoids repeated writing and misoperation of the OTP ROM so as to avoid damaging the OTP ROM or losing original data.
Referring to fig. 1, an OTP ROM programming method disclosed in the embodiment of the present application includes:
s101: receiving a programming start enabling signal written into a programming enabling register pre-mounted on an external bus by a user terminal;
in the embodiment of the present application, a program enable signal written into the program enable register by the user terminal may be received first. That is, when a user needs to program the OTP ROM, the user may write a programming enable signal into a programming enable register pre-mounted on the external bus, where the programming enable signal may specifically be a preset string of numbers, and the programming enable register is configured to receive and store an enable signal sent by the user terminal.
S102: acquiring programming configuration information written into a programming configuration register which is pre-loaded on the external bus by the user terminal;
in this step, the programming configuration information written by the user terminal into the programming configuration register may be obtained. When a user needs to program the OTP ROM and issues a programming start enabling signal, corresponding programming configuration information can be written into a programming configuration register which is pre-mounted on an external bus.
It should be noted that the programming configuration register may include, but is not limited to, an OTP address register, an OTP data input register, an OTP data output register, and an OTP read/write command register. When the programming configuration information written into the programming configuration register pre-loaded on the external bus by the user terminal is acquired, the configuration data written into the OTP data input register by the user terminal can be acquired; acquiring an OTP address port written into the OTP address register by the user terminal; and acquiring a read-write command written into the OTP read-write command register by the user terminal.
S103: and programming the OTP ROM according to the programming configuration information, and receiving a programming closing enabling signal written in the programming enabling register after the programming process of the user terminal is finished.
After the programming configuration information sent by the user terminal is acquired, the OTP ROM can be programmed according to the programming configuration information in the programming configuration register. After the programming process is finished, the user terminal writes a programming closing enabling signal into the programming enabling register so as to close the programming of the OTP ROM and avoid misoperation or repeated writing of the OTP ROM.
In a specific embodiment, the process of programming the OTP ROM according to the programming configuration information may include: if the obtained read-write command is a read command for the OTP ROM, obtaining the configuration data from the OTP data input register; storing the configuration data in the OTP data output register to read the configuration data in the OTP data output register via the external bus; that is, if the read-write command written by the user terminal in the OTP read-write command register is a read command for the OTP ROM, the configuration data written by the user terminal in the OTP data input register is taken out and put into the OTP data output register, and the external bus can access the OTP data output register to read the configuration data.
In another specific embodiment, the above process of programming the OTP ROM according to the programming configuration information may include: if the obtained read-write command is a programming instruction for an OTP ROM, sending the configuration data in the OTP data input register to a data input port of the OTP ROM; sending data in the OTP address register to an address port of the OTP ROM.
In a preferred implementation manner, in the embodiment of the present application, after receiving the programming configuration information written by the user terminal each time, the enable state of the programming enable register at the current time may be further obtained. If the enable state is a programming-allowed state, directly programming the OTP ROM according to the programming configuration information; and if the enabling state is a program-inhibited state, inhibiting the OTP ROM from being programmed according to the programming configuration information, and returning prompt information which cannot be rewritten to the user terminal. In this way, erroneous operation or repeated writing to the OTP ROM can be further effectively avoided.
According to the scheme, the OTP ROM programming method provided by the application comprises the following steps: receiving a programming start enabling signal written into a programming enabling register pre-mounted on an external bus by a user terminal; acquiring programming configuration information written into a programming configuration register which is pre-loaded on the external bus by the user terminal; and programming the OTP ROM according to the programming configuration information, and receiving a programming closing enabling signal written in the programming enabling register after the programming process of the user terminal is finished. Therefore, the OTP ROM is specifically programmed through the register, so that the space of the OTP ROM does not occupy the address space of an external bus, the programming complexity of the OTP ROM can be improved, repeated writing and misoperation on the OTP ROM are effectively avoided, and the OTP ROM and original data in the OTP ROM are protected from being damaged.
The OTP ROM programming method provided in the embodiments of the present application is described below with a specific implementation scenario. Specifically, the embodiment of the present application does not adopt a manner of directly accessing the external bus to the OTP programming interface, but controls the OTP programming interface through the register configuration data, the address and the control information.
For example, if the external bus is an AHB bus, the OTP programming enable register (OTP _ program _ en _ reg), the OTP address register (OTP _ addr _ reg), the OTP data input register (OTP _ data _ in _ reg), the OTP data output register (OTP _ data _ out _ reg), and the OTP read/write command register (OTP _ cmd _ reg) are mounted on the AHB bus. The AHB bus can perform read-write control on the register according to the address of the register.
When the user performs the OTP ROM programming, the OTP ROM programming may be firstly enabled, and particularly, a string of data, for example, 0xD4ADD7D3, may be written into the OTP programming enable register through the user terminal as a programming start enable signal to start the programming process for the OTP ROM.
After programming is enabled, the OTP data input register, the OTP address register and the OTP read-write command register can be configured through the AHB bus. When the OTP read-write command register is configured, different character strings are input to represent different commands. For example, if OTP _ cmd _ reg is 0x4C696477, indicating a read OTP ROM operation, the OTP ROM puts the read data into the OTP data output register, and then the data can be taken out through the AHB bus; when OTP _ cmd _ reg is 0XB5C6CEB0, indicating a program OTP ROM operation, the data previously written into the address register is sent to the address port of the OTP ROM, the data in the OTP data input register is sent to the data input port of the OTP ROM, and the write signal of the OTP ROM is enabled.
It will be appreciated that after programming is completed, a string of data may again be written into the OTP program enable register as a program-off enable signal to end the programming process for the OTP ROM.
Because the OTP ROM is a one-time programmable device, once the OTP ROM is programmed, programming data cannot be changed, and in order to ensure the data security and avoid misoperation or rewriting of the data, the embodiment of the application improves the programming complexity of the OTP ROM through the implementation mode, can effectively protect the OTP ROM from being damaged, and simultaneously avoids losing original data in the OTP ROM.
An OTP ROM programming system provided by the embodiments of the present application is described below, and an OTP ROM programming system described below and an OTP ROM programming method described above can be referred to with each other.
Referring to fig. 2, an OTP ROM programming system according to an embodiment of the present application includes:
a first enabling module 201, configured to receive a programming start enabling signal written by a user terminal into a programming enable register pre-mounted on an external bus;
a configuration obtaining module 202, configured to obtain programming configuration information written by the user terminal into a programming configuration register pre-loaded on the external bus;
a second enabling module 203, configured to program the OTP ROM according to the programming configuration information, and receive a program-off enabling signal written in the program enabling register after the user terminal finishes the programming process.
For the specific implementation process of the modules 201 to 203, reference may be made to the specific content disclosed in the foregoing embodiments, and details are not repeated herein.
On the basis of the foregoing embodiment, as a preferred implementation, the OTP ROM programming system provided in this embodiment may further include:
a state obtaining module, configured to obtain an enable state of the programming enable register after receiving the programming configuration information written by the user terminal;
the programming execution module is used for directly programming the OTP ROM according to the programming configuration information if the enabling state is a programming-allowed state;
and the programming inhibition module is used for inhibiting the OTP ROM from being programmed according to the programming configuration information and returning prompt information which cannot be rewritten to the user terminal if the enabling state is a programming inhibition state.
On the basis of the foregoing embodiments, as a preferred implementation manner, the programming configuration register provided in the embodiments of the present application may include, but is not limited to, an OTP address register, an OTP data input register, an OTP data output register, and an OTP read/write command register.
On the basis of the foregoing embodiment, as a preferred implementation manner, the configuration obtaining module 202 provided in the embodiment of the present application may specifically include:
a first obtaining unit, configured to obtain configuration data written by the user terminal into the OTP data input register;
a second obtaining unit, configured to obtain an OTP address port written into the OTP address register by the user terminal;
and the third acquisition unit is used for acquiring the read-write command written into the OTP read-write command register by the user terminal.
On the basis of the foregoing embodiment, as a preferred implementation manner, the second enabling module 203 provided in the embodiment of the present application specifically includes:
the data extraction unit is used for acquiring the configuration data from the OTP data input register if the acquired read-write command is a read command for an OTP ROM;
a data storing unit for storing the configuration data into the OTP data output register to read the configuration data in the OTP data output register through the external bus;
on the basis of the foregoing embodiment, as a preferred implementation manner, the second enabling module 203 provided in the embodiment of the present application specifically includes:
the first sending unit is used for sending the configuration data in the OTP data input register to a data input port of the OTP ROM if the obtained read-write command is a programming instruction for the OTP ROM;
a second transmitting unit for transmitting the data in the OTP address register to an address port of the OTP ROM.
The OTP ROM is specifically programmed through the register, so that the space of the OTP ROM does not occupy the address space of an external bus, the programming complexity of the OTP ROM can be improved, repeated writing and misoperation of the OTP ROM are effectively avoided, and the OTP ROM and original data in the OTP ROM are protected from being damaged.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. An OTP ROM programming method comprising:
receiving a programming start enabling signal written into a programming enabling register pre-mounted on an external bus by a user terminal;
acquiring programming configuration information written into a programming configuration register which is pre-loaded on the external bus by the user terminal;
and programming the OTP ROM according to the programming configuration information, and receiving a programming closing enabling signal written in the programming enabling register after the programming process of the user terminal is finished.
2. The method of programming an OTP ROM of claim 1 wherein the programming configuration register includes an OTP address register, an OTP data input register, an OTP data output register, an OTP read write command register.
3. The method of programming an OTP ROM of claim 2 wherein the obtaining of the programming configuration information written by the user terminal into the programming configuration register previously loaded on the external bus comprises:
acquiring configuration data written into the OTP data input register by the user terminal;
acquiring an OTP address port written into the OTP address register by the user terminal;
and acquiring the read-write command written into the OTP read-write command register by the user terminal.
4. The method of programming an OTP ROM according to claim 3, wherein the programming the OTP ROM according to the programming configuration information includes:
if the obtained read-write command is a read command for the OTP ROM, obtaining the configuration data from the OTP data input register;
storing the configuration data in the OTP data output register to read the configuration data in the OTP data output register via the external bus.
5. The method of programming an OTP ROM according to claim 3, wherein the programming the OTP ROM according to the programming configuration information includes:
if the obtained read-write command is a programming instruction for an OTP ROM, sending the configuration data in the OTP data input register to a data input port of the OTP ROM;
sending data in the OTP address register to an address port of the OTP ROM.
6. An OTP ROM programming method according to any of claims 1-5, further comprising:
after receiving the programming configuration information written by the user terminal, acquiring an enabling state of the programming enabling register;
if the enabling state is a programming-allowed state, directly programming the OTP ROM according to the programming configuration information;
and if the enabling state is a program-inhibited state, inhibiting the OTP ROM from being programmed according to the programming configuration information, and returning prompt information which cannot be rewritten to the user terminal.
7. An OTP ROM programming system comprising:
the first enabling module is used for receiving a programming starting enabling signal written into a programming enabling register which is mounted on an external bus in advance by a user terminal;
the configuration acquisition module is used for acquiring programming configuration information written into a programming configuration register which is pre-loaded on the external bus by the user terminal;
and the second enabling module is used for programming the OTP ROM according to the programming configuration information and receiving a programming closing enabling signal written into the programming enabling register after the programming process of the user terminal is finished.
8. The OTP ROM programming system of claim 7, further comprising:
a state obtaining module, configured to obtain an enable state of the programming enable register after receiving the programming configuration information written by the user terminal;
the programming execution module is used for directly programming the OTP ROM according to the programming configuration information if the enabling state is a programming-allowed state;
and the programming inhibition module is used for inhibiting the OTP ROM from being programmed according to the programming configuration information and returning prompt information which cannot be rewritten to the user terminal if the enabling state is a programming inhibition state.
9. The OTP ROM programming system of claim 7, wherein the programming configuration register comprises an OTP address register, an OTP data input register, an OTP data output register, an OTP read write command register.
10. The OTP ROM programming system of claim 9, wherein the configuration acquisition module comprises:
a first obtaining unit, configured to obtain configuration data written by the user terminal into the OTP data input register;
a second obtaining unit, configured to obtain an OTP address port written into the OTP address register by the user terminal;
and the third acquisition unit is used for acquiring the read-write command written into the OTP read-write command register by the user terminal.
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