CN114816464A - Firmware upgrade control method, firmware upgrade control device and optical module - Google Patents

Abstract

The present application discloses a firmware upgrade control method, a firmware upgrade control device and an optical module, which are used for firmware upgrade of dual MCUs, including a master MCU and a slave MCU, the master MCU and the slave MCU are both connected to a protocol communication bus, and the master MCU and the slave MCU are connected. The MCU is connected via the firmware upgrade hardware control pins. The main MCU receives the first control instruction sent by the upper computer. The master MCU controls the firmware upgrade hardware control pins of the slave MCU according to the first control instruction, so that the slave MCU is in a firmware upgrade state. Receive the second firmware upgrade data directly sent by the host computer from the MCU, and complete the firmware upgrade. In this application, the master MCU controls the slave MCU to be in the firmware upgrade state, and enables the slave MCU to receive the second firmware upgrade data directly sent by the host computer, without implementing a program for transferring the slave MCU firmware upgrade data in the master MCU, so that the master MCU can The MCU design is simpler and improves the overall firmware upgrade speed.

Description

A firmware upgrade control method, firmware upgrade control device and optical module

technical field

The present application relates to the technical field of optical fiber communication, and in particular, to a firmware upgrade control method, a firmware upgrade control device, and an optical module.

Background technique

At present, the firmware upgrade of the optical module is mostly the firmware upgrade of the optical module with a single MCU. The firmware upgrade control method of an optical module with a single MCU generally needs to realize the firmware upgrade of the optical module through the communication bus on the golden finger of the optical module.

For the firmware upgrade of an optical module with dual MCUs, if the firmware upgrade control method of an optical module with a single MCU is used, the firmware upgrade control method of the main MCU remains unchanged, while the firmware upgrade of the slave MCU needs to be transferred through the main MCU and passed through "Slave MCU control bus" sends firmware data to the slave MCU to complete the upgrade.

In this method, both the master and slave MCUs use the same set of boot loader, but the program for transferring the slave MCU firmware data needs to be implemented in the master MCU, which complicates the design of the master MCU and seriously slows down the overall firmware upgrade speed.

SUMMARY OF THE INVENTION

The present application provides a firmware upgrade control method, a firmware upgrade control device and an optical module, which simplify the design of the main MCU and improve the firmware upgrade speed.

A firmware upgrade control method, comprising: firmware upgrade for dual MCUs, including a master MCU and a slave MCU, wherein the master MCU and the slave MCU are both connected to a protocol communication bus, a firmware upgrade hardware control pin of the master MCU is grounded, and the master MCU and the slave MCU are connected to a protocol communication bus. The MCU is connected with the slave MCU through the firmware upgrade hardware control pins of the slave MCU;

Receive the first control command sent by the upper computer;

The firmware upgrade hardware control pin of the slave MCU is controlled according to the first control instruction, so that the slave MCU is in a firmware upgrade state, wherein the slave MCU is in a firmware upgrade state means that the slave MCU can receive the second firmware upgrade data directly sent by the host computer. state, the second firmware upgrade data is used to upgrade from the MCU firmware.

A firmware upgrade control device is used for firmware upgrade of dual MCUs, including a master MCU and a slave MCU, wherein the master MCU and the slave MCU are both connected to a protocol communication bus, the firmware upgrade hardware control pin of the master MCU is grounded, and the master MCU and the slave MCU are connected to the ground. The slave MCU is connected through the firmware upgrade hardware control pins of the slave MCU. The master MCU includes:

a receiving module, used for receiving the first control command sent by the upper computer;

The control module is used to control the firmware upgrade hardware control pin of the slave MCU according to the first control instruction, so that the slave MCU is in a firmware upgrade state, wherein, the slave MCU is in a firmware upgrade state means that the slave MCU can receive the first information directly sent by the host computer. The state of the second firmware upgrade data, the second firmware upgrade data is used to upgrade the firmware from the MCU.

An optical module, comprising:

circuit board;

The light emitting sub-module is electrically connected with the circuit board and used for emitting light signals;

The light receiving sub-module is electrically connected to the circuit board for receiving the light signal;

The circuit board is provided with a gold finger at one end, and a master MCU and a slave MCU are set on it;

The golden finger is connected with the host computer through the protocol communication bus;

The main MCU, connected with the golden finger, is used to control the slave MCU in the firmware upgrade state;

The slave MCU is connected to the golden finger through the firmware upgrade bus of the slave MCU, and is connected to the master MCU through the firmware upgrade hardware control pin of the slave MCU.

Beneficial effects: The application provides a firmware upgrade control method for dual MCU firmware upgrade, including a master MCU and a slave MCU, wherein the master MCU and the slave MCU are both connected to the protocol communication bus, and the firmware upgrade hardware control of the master MCU The pin is grounded, and the master MCU and slave MCU are connected through the firmware upgrade hardware control pin of the slave MCU. Both the master MCU and the slave MCU are connected to the protocol communication bus, indicating that both the master MCU and the slave MCU can receive the corresponding firmware upgrade data sent by the upper computer. The master MCU and the slave MCU are connected through the firmware upgrade hardware control pins of the slave MCU, indicating that the master MCU can control the slave MCU through control instructions. The firmware upgrade control method includes: first, when the main MCU is in a non-firmware upgrade state, the main MCU receives a first control instruction sent by the upper computer. Secondly, the master MCU controls the firmware upgrade hardware control pins of the slave MCU according to the first control instruction, so that the slave MCU is in a firmware upgrade state. Since the slave MCU is in a firmware upgrade state refers to a state in which the slave MCU can receive second firmware upgrade data directly sent by the host computer, wherein the second firmware upgrade data is used for firmware upgrade from the slave MCU. Finally, the second firmware upgrade data sent by the upper computer is directly received from the MCU to complete the firmware upgrade. When the main body performing the firmware upgrade is converted from the master MCU to the slave MCU, the master MCU controls the slave MCU to be in a firmware upgrade state according to the first control instruction, so that the slave MCU can receive the second firmware upgrade data directly sent by the upper computer, and complete the firmware. upgrade. In this application, the master MCU controls the firmware upgrade hardware control pins of the slave MCU, so that the slave MCU is in a firmware upgrade state, and enables the slave MCU to receive the second firmware upgrade data directly sent by the host computer, which does not need to be implemented in the master MCU. The procedure for transferring the firmware upgrade data from the MCU makes the design of the main MCU simpler and improves the overall firmware upgrade speed.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is a schematic diagram of the connection relationship of optical communication terminals;

FIG. 2 is a schematic structural diagram of an optical network terminal;

FIG. 3 is a schematic structural diagram of an optical module according to an embodiment of the present application;

FIG. 4 provides a schematic diagram of an exploded structure of an optical module according to an embodiment of the present application;

5 is a schematic structural diagram of an optical module outside the upper casing and the lower casing according to an embodiment of the present application;

6 is a schematic flowchart of a firmware upgrade control method provided by an embodiment of the present application;

FIG. 7 is a schematic flowchart of another firmware upgrade control method provided by an embodiment of the present application.

Detailed ways

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. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments may be combined with each other without conflict.

One of the core links of optical fiber communication is the mutual conversion of optical and electrical signals. Optical fiber communication uses information-carrying optical signals to transmit in information transmission equipment such as optical fibers/optical waveguides. The passive transmission characteristics of light in optical fibers/optical waveguides can realize low-cost, low-loss information transmission; while computers and other information processing equipment Electrical signals are used. In order to establish an information connection between information transmission equipment such as optical fibers/optical waveguides and information processing equipment such as computers, it is necessary to realize the mutual conversion of electrical signals and optical signals.

The optical module realizes the mutual conversion function of the above-mentioned optical and electrical signals in the technical field of optical fiber communication, and the mutual conversion of the optical signal and the electrical signal is the core function of the optical module. The optical module realizes the electrical connection with the external host computer through the golden fingers on its internal circuit board. The main electrical connections include power supply, I2C signal, data signal and grounding, etc. The optical module realizes the optical connection with the external optical fiber through the optical interface. There are many ways to connect external optical fibers, and a variety of optical fiber connector types are derived; the use of gold fingers to achieve electrical connection at the electrical interface has become the mainstream connection method in the optical module industry. The definition of the pin has formed a variety of industry protocols/standards; the optical connection method realized by the optical interface and the optical fiber connector has become the mainstream connection method in the optical module industry. Based on this, the optical fiber connector has also formed a variety of industry standards. Such as LC interface, SC interface, MPO interface, etc., the optical interface of the optical module is also designed for the adaptability of the optical fiber connector, so the optical fiber adapter components set at the optical interface have various types.

FIG. 1 is a schematic diagram of a connection relationship of an optical communication terminal. As shown in FIG. 1 , the connection of the optical communication terminal mainly includes the interconnection between the optical network terminal 100, the optical module 200, the optical fiber 101 and the network cable 103;

One end of the optical fiber 101 is connected to the remote server, and one end of the network cable 103 is connected to the local information processing device. The connection between the local information processing device and the remote server is completed by the connection between the optical fiber 101 and the network cable 103; and the connection between the optical fiber 101 and the network cable 103 is completed by The optical network terminal 100 with the optical module 200 is completed.

The optical interface of the optical module 200 is externally connected to the optical fiber 101, and a two-way optical signal connection is established with the optical fiber 101; the electrical interface of the optical module 200 is externally connected to the optical network terminal 100, and a two-way electrical signal connection is established with the optical network terminal 100; The two-way mutual conversion between optical signals and electrical signals is realized inside the optical module, so as to establish an information connection between the optical fiber and the optical network terminal; specifically, the optical signal from the optical fiber 101 is converted into an electrical signal by the optical module and then input to the optical network terminal. In 100 , the electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module and input into the optical fiber 101 .

The optical network terminal has an optical module interface 102, which is used to access the optical module 200 and establish a two-way electrical signal connection with the optical module 200; Signal connection (generally the electrical signal of the Ethernet protocol, which belongs to a different protocol/type from the electrical signal used by the optical module); the optical network terminal 100 establishes a connection between the optical module 200 and the network cable 103. Specifically, the optical network terminal will The signal from the optical module is transmitted to the network cable, and the signal from the network cable is transmitted to the optical module. The optical network terminal acts as the upper computer of the optical module to monitor the operation of the optical module. The optical network terminal is the host computer of the optical module. It provides data signals to the optical module and receives data signals from the optical module. So far, the remote server communicates with the local information processing equipment through optical fibers, optical modules, optical network terminals and network cables. Establish a two-way signal transmission channel.

Common local information processing equipment includes routers, home switches, electronic computers, etc.; common optical network terminals include optical network units ONU, optical line terminals OLT, data center servers, and data center switches.

FIG. 2 is a schematic structural diagram of an optical network terminal. As shown in FIG. 2, the optical network terminal 100 has a circuit board 105, and a cage 106 is provided on the surface of the circuit board 105; an electrical connector is provided inside the cage 106 for connecting to an electrical interface (such as a gold finger) of an optical module. etc.); a radiator 107 is provided on the cage 106, and the radiator 107 has raised portions such as fins that increase the heat dissipation area.

The optical module 200 is inserted into the optical network terminal, the electrical interface of the optical module is inserted into the electrical connector inside the cage 106 , and the optical interface of the optical module is connected to the optical fiber 101 .

The cage 106 is located on the circuit board, and the electrical connectors on the circuit board are wrapped in the cage, so that the interior of the cage is provided with electrical connectors; the optical module is inserted into the cage, the optical module is fixed by the cage, and the heat generated by the optical module is conducted to the cage. 106 and then diffused through a heat sink 107 on the cage.

FIG. 3 is a schematic structural diagram of an optical module provided by an embodiment of the present application, and FIG. 4 is a schematic structural diagram of an exploded optical module provided by an embodiment of the present application. FIG. 5 is a schematic structural diagram of an optical module outside the upper casing and the lower casing according to an embodiment of the present application. As shown in FIGS. 3-5 , the optical module 200 provided in this embodiment of the present application includes an upper casing 201 , a lower casing 202 , an unlocking component 203 , a circuit board 300 , an optical transmitting sub-module 400 and an optical receiving sub-module 500 .

The upper casing 201 is covered on the lower casing 202 to form a wrapping cavity with two openings; the outer contour of the wrapping cavity generally presents a square body, specifically, the lower casing includes a main board and two sides of the main board, which are connected to the main board. Two side plates arranged vertically; the upper shell includes a cover plate, and the cover plate is closed on the two side plates of the upper shell to form a wrapping cavity; the upper shell can also include a cover located on both sides of the cover plate, The two side walls vertically arranged on the board are combined with the two side plates to realize that the upper casing is covered on the lower casing.

Specifically, the two openings may be two openings (204, 205) at the same end of the optical module, or two openings at different ends of the optical module; one of the openings is the electrical port 204, and the gold fingers of the circuit board extend from the electrical port 204. The other opening is the optical port 205, which is used for external optical fiber access to connect the optical transmitting sub-module 400 and the optical receiving sub-module 500 inside the optical module; the circuit board 300, the optical transmitting sub-module The optoelectronic devices such as 400 and the light receiving sub-module 500 are located in the package cavity.

The combination of the upper case and the lower case is adopted, which facilitates the installation of the circuit board 300, the light emitting sub-module 400 and the light receiving sub-module 500 into the case, and the upper case and the lower case form the outermost part of the optical module. The upper and lower casings are generally made of metal materials, which are conducive to electromagnetic shielding and heat dissipation; generally, the casing of the optical module is not made into an integral part, so that when assembling circuit boards and other devices, positioning Components, heat dissipation and electromagnetic shielding components cannot be installed and are not conducive to production automation.

The unlocking part 203 is located on the outer wall of the enclosing cavity/lower casing 202, and is used to realize the fixed connection between the optical module and the upper computer, or to release the fixed connection between the optical module and the upper computer.

The unlocking part 203 has an engaging part matched with the cage of the upper computer; pulling the end of the unlocking part can make the unlocking part move relatively on the surface of the outer wall; the optical module is inserted into the cage of the upper computer, and the optical module is moved by the engaging part of the unlocking part. It is fixed in the cage of the upper computer; by pulling the unlocking part, the engaging part of the unlocking part moves with it, thereby changing the connection relationship between the engaging part and the upper computer, so as to release the engaging relationship between the optical module and the upper computer, so that the The optical module is pulled out from the cage of the host computer.

The circuit board 300 is provided with circuit traces, electronic components (such as capacitors, resistors, triodes, MOS tubes) and chips (such as MCU301, laser driver chips, limiting amplifier chips, clock data recovery CDRs, power management chips, and data processing chips). DSP), etc., and a nonvolatile memory 302 is also provided.

The circuit board connects the electrical components in the optical module according to the circuit design through the circuit wiring, so as to realize the electrical functions such as power supply, electrical signal transmission and grounding.

The circuit board is generally a rigid circuit board. Due to its relatively hard material, the rigid circuit board can also realize the bearing function. For example, the rigid circuit board can carry the chip smoothly; when the optical transceiver is located on the circuit board, the rigid circuit board can also provide Stable bearing; the rigid circuit board can also be inserted into the electrical connector in the upper computer cage, specifically, metal pins/gold fingers are formed on one end surface of the rigid circuit board for connecting with the electrical connector; these are all It is inconvenient to realize the flexible circuit board.

The golden finger is connected to the host computer through the protocol communication bus, and is used to receive the information transmitted by the host computer and the optical module.

The circuit board 300 is provided with a master MCU 301 and a slave MCU 302 . specific,

Since the firmware upgrade logic of the master MCU301 and the slave MCU302 is the same, when the master MCU301 and the slave MCU302 judge that they should be in a certain state, they both first determine whether the firmware upgrade hardware control pin level is the first level, and then the firmware upgrade hardware control When the pin level is the first level, continue to judge whether the value of the identification value of the firmware upgrade software is the second value. Specifically, when the level of the firmware upgrade hardware control pin is the second level, the corresponding MCU is in a non-firmware upgrade state. When the level of the firmware upgrade hardware control pin is the first level, and the firmware upgrade software identification value is the second value, the corresponding MCU is in a non-firmware upgrade state. When the level of the firmware upgrade hardware control pin is the first level and the value of the firmware upgrade software identifier is the first value, the corresponding MCU is in the firmware upgrade state. For the main MCU 301, since the firmware upgrade hardware control pin of the main MCU 301 is always grounded, the level of the firmware upgrade hardware control pin of the main MCU 301 is always the first level. Therefore, when the main MCU 301 judges that it should be in a certain state, there is no need to judge whether the level of the firmware upgrade hardware control pin of the main MCU 301 is the first level, and it can be directly judged whether the firmware upgrade software identification value of the main MCU 301 is the second level. numerical value. For the slave MCU 302, since the firmware of the slave MCU 302 upgrades the software identification value is always the first value. Therefore, when it is judged that the slave MCU302 should be in a certain state, it is not necessary to judge whether the value of the firmware upgrade software identification value of the slave MCU302 is the second value, and it can be directly judged whether the firmware upgrade hardware control pin level of the master MCU301 is the first power level. flat. The first level is a low level, the second level is a high level, the first value is 0, and the second value is 1. In this application, the value of the firmware upgrade software identification can only be the first value or the second value.

The master MCU 301 is connected to the golden finger through the firmware upgrade bus of the master MCU, and is used to control the slave MCU 302 to be in a firmware upgrade state. Specifically, when the master MCU 301 is in the non-firmware upgrade state, the master MCU 301 receives the first control instruction sent by the upper computer 100, and controls the slave MCU 302 to be in the firmware upgrade state according to the first control instruction.

There are two situations when the main MCU 301 is in a non-firmware upgrade state. The first situation is: the main MCU 301 completes the firmware upgrade, exits the firmware upgrade program, and enters the normal program. The second case is: the main MCU 301 has never been upgraded from firmware. The main MCU 301 exits the firmware upgrade program after completing the firmware upgrade, and enters the normal program, including: first, the main MCU 301 receives the first write instruction sent by the host computer 100 through the protocol communication bus and the cheat, and according to the first write instruction The input command makes the main MCU 301 in a firmware upgrade state, and secondly, the main MCU 301 receives the first firmware upgrade data sent by the upper computer, so that the main MCU 301 completes the firmware upgrade. Finally, the main MCU 301 receives the second write instruction sent by the upper computer, and puts it in a non-firmware upgrade state according to the second write instruction.

Since the main MCU 301 can be in a firmware upgrade state according to the first write instruction, it can be seen from the above description that the first write instruction refers to an instruction whose firmware upgrade software identification value of the main MCU 301 is the first value. Since the main MCU 301 exits the firmware upgrade program according to the second write instruction and enters the normal program, it can be seen from the above description that the second write instruction refers to the instruction whose firmware upgrade software identification value of the main MCU 301 is the second value.

The slave MCU302 is connected to the golden finger through the firmware upgrade bus of the slave MCU, and is connected to the master MCU301 through the firmware upgrade hardware control pin of the slave MCU to complete the firmware upgrade. Specifically, since the slave MCU 302 does not need to enter the firmware upgrade, the firmware upgrade hardware control pin of the slave MCU is pulled high. When the master MCU 301 completes the firmware upgrade and needs to complete the firmware upgrade of the slave MCU 302, the master MCU 301 controls the firmware upgrade hardware control pin of the slave MCU 301 to pull down according to the first control instruction, so that the level of the firmware upgrade hardware control pin of the slave MCU 302 is first level. According to the above description, it can be seen that the software identification value of the firmware upgrade from the MCU 302 is always the first value, and the slave MCU 302 is in the firmware upgrade state according to the level of the hardware control pin of the firmware upgrade from the MCU 302 is the first level. Since the slave MCU is in a firmware upgrade state refers to a state in which the slave MCU can receive the second firmware upgrade data directly sent by the host computer, and the second firmware upgrade data is used for the slave MCU firmware upgrade. Then, when the slave MCU 302 is in the firmware upgrade state, it can receive the second firmware upgrade data directly sent by the upper computer, and complete the firmware upgrade.

Flexible circuit boards are also used in some optical modules as a supplement to rigid circuit boards; flexible circuit boards are generally used in conjunction with rigid circuit boards. For example, flexible circuit boards can be used to connect the rigid circuit boards and optical transceivers.

The light emitting sub-module 400 is electrically connected to the circuit board 300 for emitting light signals.

One end of the light receiving sub-module 500 is connected to an external optical fiber, and the other end is electrically connected to the circuit board 300 through pins and a flexible board, and is used for receiving the optical signal transmitted by the external optical fiber.

In the embodiments of this application, the upper computer refers to an optical network terminal.

In addition to providing an optical module, the embodiments of the present application also provide a firmware upgrade control method. The firmware upgrade control method is used for firmware upgrade of dual MCUs, including a master MCU and a slave MCU, wherein both the master MCU and the slave MCU are connected to a protocol communication bus, the firmware upgrade logic of the master MCU and the slave MCU is the same, and the firmware of the master MCU and the slave MCU are the same. The upgrade hardware control pin is grounded, the master MCU and the slave MCU are connected through the slave MCU firmware upgrade hardware control pin, and the slave MCU firmware upgrade software identification value is the first value. Since the main MCU is in a non-firmware upgrade state, including two situations, the firmware upgrade control method is divided into two types. The main MCU in Embodiment 1 is in the second situation, and the main MCU in Embodiment 2 is in the first situation.

Example 1

FIG. 6 is a schematic flowchart of a firmware upgrade control method provided by an embodiment of the present application. Since the main MCU is in the non-firmware upgrade state here, it means that the main MCU has never been upgraded from firmware. As can be seen in Figure 6, the specific steps of the firmware upgrade control method are as follows:

S100: Receive the first control instruction sent by the upper computer.

The main MCU receives the first control instruction sent by the upper computer when the main MCU is in a non-firmware upgrade state.

Since the software identification value of the firmware upgrade from the MCU is always the first value, when the slave MCU needs to upgrade the firmware, it only needs to make the level of the firmware upgrade hardware control pin be the first level. Therefore, the first control instruction refers to an instruction to upgrade the hardware control pin level to the first level from the firmware of the MCU.

Since the master MCU has never been upgraded with firmware, upgrade the slave MCU firmware first. At this time, the host computer sends the first control instruction to the main MCU, and the main MCU receives the control instruction.

The specific steps are as follows: the host computer sends an instruction for controlling the firmware upgrade hardware control pin level of the slave MCU to be the first level to the master MCU; the master MCU receives the instruction.

S200: Control the firmware upgrade hardware control pin of the slave MCU according to the first control instruction, so that the slave MCU is in a firmware upgrade state, wherein the slave MCU is in a firmware upgrade state means that the slave MCU can receive the second firmware upgrade directly sent by the host computer The state of the data, the second firmware upgrade data is used to upgrade from the MCU firmware.

The master MCU controls the firmware upgrade hardware control pins of the slave MCU according to the first control instruction, so that the slave MCU is in a firmware upgrade state.

The master MCU controls the firmware upgrade hardware control pin of the slave MCU to the first level according to the first control instruction, wherein the firmware upgrade hardware control pin level of the slave MCU is the first level to indicate that the slave MCU is in a firmware upgrade state . In this state, the slave MCU can receive the second firmware upgrade data directly sent by the host computer, and complete the firmware upgrade according to the second firmware upgrade data.

The specific steps are as follows: the master MCU controls the firmware upgrade hardware control pin of the slave MCU to pull down according to the instruction. Since the firmware upgrade hardware control pin from the MCU is pulled low, it means that the firmware upgrade hardware control pin level from the MCU is the first level, and the firmware upgrade hardware control pin level from the MCU is the first level to indicate the slave MCU firmware upgrade hardware control pin level is the first level. When the MCU is in the firmware upgrade state, the MCU recognizes that the firmware upgrade hardware control pin of the slave MCU is pulled low, that is, when the firmware upgrade hardware control pin level of the slave MCU is the first level, it is in the firmware upgrade state.

After the slave MCU completes the firmware upgrade, when the master MCU needs to complete the firmware upgrade, the slave MCU needs to exit the firmware upgrade state first, and then the master MCU is in the firmware upgrade state. The specific process is as follows:

S300: Receive the second control instruction sent by the upper computer.

The main MCU receives the second control instruction sent by the upper computer.

Since the value of the firmware upgrade software identification value of the slave MCU is always the first value, when the slave MCU needs to exit the firmware upgrade program, it only needs to set the level of the firmware upgrade hardware control pin to the second level. Therefore, the second control instruction refers to an instruction to control the firmware of the MCU to upgrade the hardware control pin level to the second level.

The specific steps are as follows: the host computer sends an instruction to control the firmware upgrade hardware control pin level of the slave MCU to be the second level to the master MCU; the master MCU receives the instruction.

S400: Control the firmware upgrade hardware control pin of the slave MCU according to the second control instruction, so that the slave MCU is in a non-firmware upgrade state.

The master MCU controls the firmware of the slave MCU to upgrade the hardware control pin level to the second level according to the second control instruction, wherein the level of the hardware control pin of the firmware upgrade of the slave MCU is the second level, which is used to indicate that the slave MCU is in a non-volatile state. Firmware upgrade status.

The specific steps are as follows: the master MCU controls the firmware upgrade hardware control pin of the slave MCU to pull high according to the instruction. Since the hardware control pin of firmware upgrade from MCU is pulled high, it means that the level of the hardware control pin of firmware upgrade from MCU is the second level, and the level of the hardware control pin of firmware upgrade from MCU is the second level, which is used to indicate that the level of the hardware control pin of firmware upgrade from MCU is the second level. When the MCU is in a non-firmware upgrade state, the MCU recognizes that the firmware upgrade hardware control pin of the slave MCU is pulled high, that is, when the firmware upgrade hardware control pin level of the slave MCU is the second level, it is in a non-firmware upgrade state.

When the master MCU needs to complete the firmware upgrade, since the slave MCU is in a non-firmware upgrade state at this time, the host computer directly sends the first write command and the first firmware upgrade data to the master MCU, so that the master MCU can complete the firmware upgrade.

In this application, the non-firmware upgrade state means that the MCU completes the firmware upgrade, exits the firmware upgrade program, and enters the normal program.

Example 2

FIG. 7 is a schematic flowchart of another firmware upgrade control method provided by an embodiment of the present application. Since the main MCU is in a non-firmware upgrade state, it means that the main MCU completes the firmware upgrade and exits the firmware upgrade program. After entering the normal program, as shown in Figure 7, the specific steps of the firmware upgrade control method are as follows:

T100: Receive the first write instruction sent by the upper computer, and make the main MCU in a firmware upgrade state according to the first write instruction.

The main MCU receives the first write instruction sent by the upper computer, and makes it in a firmware upgrade state according to the first write instruction. The fact that the main MCU is in a firmware upgrade state refers to a state in which the main MCU can directly receive the first firmware upgrade data sent by the upper computer. Wherein, the first firmware upgrade data is used for main MCU firmware upgrade.

The firmware upgrade hardware control pin of the main MCU is always grounded, that is, the level of the firmware upgrade hardware control pin of the main MCU is the first level. When the main MCU needs to upgrade the firmware, it only needs to make the value of the firmware upgrade software identification value be the first value. Therefore, the first write instruction refers to an instruction in which the firmware upgrade software of the main MCU identifies the value as the first value.

The specific process of this step is as follows: the upper computer writes the instruction of the firmware upgrade software identification value of the main MCU as the first value into the main MCU. The main MCU receives the command and judges which state it should be in according to the command. Since this command is used to indicate that the main MCU is in a firmware upgrade state, when the main MCU recognizes this command, it is in a firmware upgrade state.

T200: Receive the first firmware upgrade data sent by the upper computer, and complete the firmware upgrade.

The main MCU receives the first firmware upgrade data sent by the upper computer, and completes the firmware upgrade.

After the master MCU completes the firmware upgrade, when the slave MCU needs to complete the firmware upgrade, the master MCU first needs to exit the firmware upgrade state and is in the non-firmware upgrade state, and then the master MCU controls the slave MCU to be in the firmware upgrade state. details as follows:

T300: Receive the second write instruction sent by the upper computer, and make the main MCU in a non-firmware upgrade state according to the second write instruction.

The main MCU receives the second write instruction sent by the upper computer, and makes the main MCU in a non-firmware upgrade state according to the second write instruction.

The firmware upgrade hardware control pin of the main MCU is always grounded, that is, the level of the firmware upgrade hardware control pin of the main MCU is the first level. When the main MCU exits the firmware upgrade program, it only needs to set the value of the firmware upgrade software identification to the second value. Therefore, the second write instruction refers to an instruction in which the firmware upgrade software of the main MCU identifies the value as the second value.

The specific process of this step is as follows: the host computer writes the instruction of the firmware upgrade software identification value of the main MCU as the second value into the main MCU. The main MCU receives the command and judges which state it should be in according to the command. Since this command is used to indicate that the main MCU is in a non-firmware upgrade state, when the main MCU recognizes this command, it is in a non-firmware upgrade state.

T400: Receive the first control command sent by the upper computer.

The main MCU receives the first control instruction sent by the upper computer.

T500: Control the firmware upgrade hardware control pin of the slave MCU according to the first control instruction, so that the slave MCU is in a firmware upgrade state, wherein the slave MCU is in a firmware upgrade state means that the slave MCU can receive the second firmware upgrade directly sent by the host computer The state of the data, the second firmware upgrade data is used to upgrade from the MCU firmware.

The master MCU controls the firmware upgrade hardware control pins of the slave MCU according to the first control instruction, so that the slave MCU is in a firmware upgrade state.

T600: Receive the second control command sent by the upper computer.

The main MCU receives the second control instruction sent by the upper computer.

T700: Control the firmware upgrade hardware control pin of the slave MCU according to the second control instruction, so that the slave MCU is in a non-firmware upgrade state.

The master MCU controls the slave MCU to be in a non-firmware upgrade state according to the second control instruction.

In this embodiment, the same parts as those in Embodiment 1 will not be repeated.

In addition to providing a firmware upgrade control method, the present application also provides a firmware upgrade control device, the device includes a firmware upgrade for dual MCUs, including a master MCU and a slave MCU, wherein the master MCU and the slave MCU are both connected to Into the protocol communication bus, the firmware upgrade hardware control pin of the master MCU is grounded, and the master MCU and the slave MCU are connected through the firmware upgrade hardware control pin of the slave MCU. The main MCU includes a receiving module and a control module. specific,

The receiving module is used for receiving the first control instruction sent by the upper computer.

The control module is used to control the firmware upgrade hardware control pin of the slave MCU according to the first control instruction, so that the slave MCU is in a firmware upgrade state, wherein, the slave MCU is in a firmware upgrade state means that the slave MCU can receive the first information directly sent by the host computer. The state of the second firmware upgrade data, the second firmware upgrade data is used to upgrade the firmware from the MCU.

The present application provides a firmware upgrade control method for dual MCU firmware upgrade, including a master MCU and a slave MCU, wherein both the master MCU and the slave MCU are connected to a protocol communication bus, and the firmware upgrade hardware control pin of the master MCU is grounded , the master MCU and the slave MCU are connected through the firmware upgrade hardware control pins of the slave MCU. Both the master MCU and the slave MCU are connected to the protocol communication bus, indicating that both the master MCU and the slave MCU can receive the corresponding firmware upgrade data sent by the upper computer. The master MCU and the slave MCU are connected through the firmware upgrade hardware control pins of the slave MCU, indicating that the master MCU can control the slave MCU through control instructions. The firmware upgrade control method includes: first, when the main MCU is in a non-firmware upgrade state, the main MCU receives a first control instruction sent by the upper computer. Secondly, the master MCU controls the firmware upgrade hardware control pins of the slave MCU according to the first control instruction, so that the slave MCU is in a firmware upgrade state. Since the slave MCU is in a firmware upgrade state refers to a state in which the slave MCU can receive the second firmware upgrade data directly sent by the host computer, wherein the second firmware upgrade data is used for the slave MCU firmware upgrade. Then finally, the second firmware upgrade data directly sent by the upper computer is received from the MCU to complete the firmware upgrade. When the main body performing the firmware upgrade is converted from the master MCU to the slave MCU, the master MCU controls the slave MCU to be in a firmware upgrade state according to the first control instruction, so that the slave MCU can receive the second firmware upgrade data directly sent by the upper computer, and complete the firmware. upgrade. In this application, the master MCU controls the firmware upgrade hardware control pins of the slave MCU, so that the slave MCU is in a firmware upgrade state, and the slave MCU can receive the second firmware upgrade data directly sent by the host computer, and does not need to be implemented in the master MCU. The procedure for transferring the firmware upgrade data from the MCU makes the design of the main MCU simpler and improves the overall firmware upgrade speed.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims (9)

1. a firmware upgrade control method, is characterized in that, is used for the firmware upgrade of dual MCU, comprises main MCU and slave MCU, wherein, described main MCU and described slave MCU all access protocol communication bus, and described main MCU The firmware upgrade hardware control pin of the slave MCU is grounded, and the main MCU and the slave MCU are connected by the firmware upgrade hardware control pin of the slave MCU; Receive the first control command sent by the upper computer; The firmware upgrade hardware control pin of the slave MCU is controlled according to the first control instruction, so that the slave MCU is in a firmware upgrade state, wherein the slave MCU is in a firmware upgrade state means that the slave MCU can receive the second data directly sent by the host computer. The state of the firmware upgrade data, the second firmware upgrade data is used for the slave MCU firmware upgrade. 2. The firmware upgrade control method according to claim 1, wherein the master MCU and the slave MCU have the same firmware upgrade logic, and the master MCU also makes The main MCU is in a firmware upgrade state, wherein the first write instruction refers to an instruction whose firmware upgrade software identification value of the main MCU is a first value. 3. firmware upgrade control method according to claim 1, is characterized in that, according to described first control instruction control the firmware upgrade hardware control pin of slave MCU, make slave MCU be in firmware upgrade state, comprise: According to the first control instruction, the level of the hardware control pin for upgrading the firmware of the slave MCU is controlled to be the first level, wherein the level of the hardware control pin for upgrading the firmware of the slave MCU to the first level is used to indicate that the slave MCU is in the firmware Upgrade status. 4. firmware upgrade control method according to claim 1, is characterized in that, according to described first control instruction control from the firmware upgrade hardware control pin of MCU, make after being in firmware upgrade state from MCU, also comprise: Receive the second control command sent by the upper computer; The firmware upgrade hardware control pin of the slave MCU is controlled according to the second control instruction, so that the slave MCU is in a non-firmware upgrade state. 5. firmware upgrade control method according to claim 4, is characterized in that, according to described second control instruction control the firmware upgrade hardware control pin of slave MCU, make slave MCU be in non-firmware upgrade state, comprise: According to the second control instruction, the firmware upgrade hardware control pin level of the slave MCU is controlled to be the second level, wherein, the firmware upgrade hardware control pin level of the slave MCU is the second level, which is used to indicate that the slave MCU is in a non-volatile state. Firmware upgrade status. 6. The firmware upgrade control method according to claim 1, wherein the main MCU receives the first control instruction sent by the host computer when the main MCU is in a non-firmware upgrade state, wherein the main MCU is in a non-firmware upgrade state Status includes: After the main MCU is in the firmware upgrade state, the main MCU receives the first firmware upgrade data sent by the upper computer, and completes the firmware upgrade; The main MCU receives the second write instruction sent by the upper computer, and makes the main MCU in a non-firmware upgrade state according to the second write instruction. 7 . The firmware upgrade control method according to claim 6 , wherein the second write instruction refers to an instruction in which the firmware upgrade software identification value of the main MCU is the second value. 8 . 8. A firmware upgrade control device, characterized in that it is used for firmware upgrade of dual MCUs, comprising a master MCU and a slave MCU, wherein the master MCU and the slave MCU are both connected to a protocol communication bus, and the master MCU The firmware upgrade hardware control pin of the slave MCU is grounded, and the main MCU and the slave MCU are connected through the firmware upgrade hardware control pin of the slave MCU, and the main MCU includes: a receiving module, used for receiving the first control command sent by the upper computer; The control module is used to control the firmware upgrade hardware control pins of the slave MCU according to the first control instruction, so that the slave MCU is in a firmware upgrade state, wherein the slave MCU is in a firmware upgrade state means that the slave MCU can receive a host computer The state of the directly sent second firmware upgrade data, where the second firmware upgrade data is used for the slave MCU firmware upgrade. 9. An optical module, characterized in that, comprising: circuit board; an optical emission sub-module, electrically connected to the circuit board, for emitting optical signals; an optical receiving sub-module electrically connected to the circuit board for receiving optical signals; The circuit board is provided with a gold finger at one end, and a master MCU and a slave MCU are arranged on it; The golden finger is connected with the host computer through a protocol communication bus; The master MCU is connected to the golden finger and is used to control the slave MCU to be in a firmware upgrade state; The slave MCU is connected to the golden finger through the firmware upgrade bus of the slave MCU, and is connected to the master MCU through the firmware upgrade hardware control pin of the slave MCU.

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