CN115509976A - Operating system and method for transmitting debugging start information based on universal serial port - Google Patents
Operating system and method for transmitting debugging start information based on universal serial port Download PDFInfo
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- CN115509976A CN115509976A CN202211143841.9A CN202211143841A CN115509976A CN 115509976 A CN115509976 A CN 115509976A CN 202211143841 A CN202211143841 A CN 202211143841A CN 115509976 A CN115509976 A CN 115509976A
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
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Abstract
The invention discloses an operating system and a method for transmitting debugging start information based on a universal serial port, relating to the technical field of computer debugging, wherein the operating system comprises: the CPU general serial port, the CPU debugging serial port and the BIOS setting module form a processing unit and a programmable logic unit formed by a selection switch module; the selection switch module is used for selectively connecting the system universal serial port with the CPU universal serial port or connecting the system universal serial port with the CPU debugging serial port according to the mode command of the BIOS setting module; through the design of the selection switch module, the system universal serial port and the CPU universal serial port are communicated or the system universal serial port and the CPU debugging serial port are communicated in different modes under the control of the BIOS setting module, and the technical problem that the system universal interface can not output the starting information of the CPU debugging serial port is solved.
Description
Technical Field
The invention relates to the technical field of computer debugging, in particular to an operating system and method for transmitting debugging start information based on a universal serial port.
Background
The debugging serial port is a device which is initialized by a CPU (central processing unit) processor firstly and can receive all processor system messages, so a computer mainboard manufacturer usually uses the debugging serial port for debugging hardware at the bottommost layer and diagnosing the abnormality of mainboard hardware. The universal serial port is an asynchronous communication port opened by a computer mainboard manufacturer to an equipment manufacturer, and is in data communication with a sensor, a terminal and the like outside the equipment. The debugging serial port is generally well specified by the solidification of a CPU processor, is used for initializing the processor and an operating system to output printing information and cannot be changed randomly. For example, the debugging serial port of the Feiteng processor is COM1, the debugging serial port of the Loongson processor is COM0, and the like.
In the practical application of industrial control, the general serial port or the USB interface is usually used for communication with an external device, but unfortunately, the interfaces cannot output the starting information of the CPU debugging serial port, and the computer needs to be dismounted and debugged to acquire the starting information of the CPU debugging serial port, so that the workload and difficulty of computer fault diagnosis and positioning are increased, and the fault recovery efficiency is reduced by dismounting and mounting the computer.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention aims to provide an operating system and a method for transmitting debugging starting information based on a universal serial port, which can realize the connection between a system universal serial port and a CPU universal serial port or the connection between the system universal serial port and the CPU debugging serial port in different modes under the control of a BIOS setting module by designing a selection switch module, and solve the technical problem that the system universal serial port can not output the starting information of the CPU debugging serial port.
The invention is realized by the following technical scheme:
this scheme provides an operating system based on general serial ports transmission debugging start information, includes: a processing unit and a programmable logic unit;
the processing unit includes: the CPU universal serial port, the CPU debugging serial port and the BIOS setting module; the programmable logic unit comprises a selection switch module;
the selection switch module is used for selectively connecting the system universal serial port with the CPU universal serial port or connecting the system universal serial port with the CPU debugging serial port according to the mode command of the BIOS setting module.
The working principle of the scheme is as follows: the invention aims to provide an operating system based on universal serial port transmission debugging starting information, which realizes the connection between a system universal serial port and a CPU universal serial port or between the system universal serial port and the CPU debugging serial port in different modes by designing a selection switch module under the control of a BIOS setting module, and solves the technical problem that the system universal serial port can not output the starting information of the CPU debugging serial port.
Further, the optimization scheme is that the selection switch module comprises: the logic command input end, a first buffer, a second buffer, a first double-pole double-throw switch and a second double-pole double-throw switch; the logic command input end receives a mode command of the BIOS setting module;
the first fixed end of the first double-pole double-throw switch is connected to the CPU debugging serial port, the second fixed end is connected to the system general serial port, and the logic command input end is connected to the movable end of the first double-pole double-throw switch through the first buffer;
the first fixed end of the second double-pole double-throw switch is connected to the general serial port of the CPU, the second fixed end of the second double-pole double-throw switch is connected to the general serial port of the system, and the logic command input end of the second double-pole double-throw switch is connected to the moving end of the second double-pole double-throw switch through a second buffer.
A further optimization scheme is that the programmable logic unit further comprises a mode control module, and the mode control module comprises: a command parser and a controller;
the command parser is connected with the BIOS setting module through communication buses such as SPI, I2C and LBC, and the command parser is used for parsing mode commands of the BIOS setting module;
the controller is connected between the command parser and the selection switch module and used for controlling the selection switch module according to the mode command.
The further optimization scheme is that the mode control module also comprises an emergency diagnosis mode controller; the emergency diagnosis mode controller is connected with the controller,
the emergency diagnosis mode controller is used for receiving an external emergency diagnosis command, and the controller also inputs the emergency diagnosis command to the logic command input end based on the external emergency diagnosis command, wherein the emergency diagnosis command is a universal serial port of a connecting system and a CPU debugging serial port.
The further optimization scheme is that the external emergency diagnosis command is a section of feature codes repeatedly sent from an external universal data serial port to a system universal serial port.
In order to avoid the phenomenon that the initialization process of the BIOS setting module is blocked by peripheral equipment, and an operating system cannot enter a BIOS selection mode, the scheme realizes the switching of a serial port line from a default CPU universal serial port to a CPU debugging serial port through an emergency diagnosis mode controller and related circuits thereof, and the mechanism is as follows: after the operating system is powered on, the emergency diagnosis mode receiver is powered on, and then the CPU processor is powered on. Meanwhile, after the operating system is powered on, the external debugging computer repeatedly sends a section of 32-bit data to the equipment at 115200 baud rate through the general data serial port to the TxD line. The emergency diagnosis mode receiver detects the waveform on the general data line in the period of operation that the CPU gets electricity first, if the waveform with change is detected and the decoded waveform is the emergency diagnosis mode instruction, the serial port line is switched to the CPU debug serial port through the selection switch module, the serial port line is switched to the CPU debug serial port, the asynchronous serial interface of the device is the debug serial port, and the system general interface can output the CPU electrifying printing information.
The scheme also provides a method for transmitting debugging starting information based on the universal serial port, which comprises the following steps:
step one, configuring a mode:
configuring a first mode as a diagnosis mode and a second mode as a user mode in an operating system in which a system universal serial port is positioned;
step two, the processor generates a mode instruction;
step three, selecting to switch on a CPU debugging serial port or a CPU general serial port of the processor based on the mode instruction:
under the instruction of a diagnosis mode, connecting the CPU debugging serial port with the system general serial port;
and under the instruction of the user mode, connecting the universal serial port of the CPU with the universal serial port of the system.
The further optimization scheme is that the third step comprises:
configuring a serial port line selection switch in an operating system where the universal serial port is located;
when the serial port line selection switch receives the diagnosis mode instruction, a path where the CPU debugging serial port and the system general serial port are located is closed;
and when the serial port line selection switch receives the user mode instruction, closing a passage where the CPU universal serial port and the system universal serial port are located.
The further optimization scheme is that the method further comprises the following steps before the step two:
under the default condition, setting a universal serial port of a processor to be connected with a universal serial port of a system;
after an operating system where the universal serial port is located is powered on, searching an external emergency diagnosis command, executing a process A and then powering on a processor;
a process A: when the operating system where the universal serial port is located receives an external emergency diagnosis command, the debugging serial port of the processor is connected with the universal serial port of the system.
The further optimization scheme is that the external emergency diagnosis command is a section of feature codes repeatedly sent from an external universal data serial port to a system universal serial port.
When an external emergency diagnosis command is received, detecting whether the waveform of a data line of the universal serial port of the system is changed or not, if so, decoding the waveform to see whether the command is in an emergency diagnosis mode or not, and otherwise, directly powering on the processor and entering the step two.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention provides an operating system and a method for transmitting debugging start information based on a universal serial port, which are characterized in that a selection switch module is designed, under the control of a BIOS setting module, the system universal serial port and a CPU universal serial port are connected or the system universal serial port and the CPU debugging serial port are connected in different modes, the technical problem that the system universal interface can not output the start information of the CPU debugging serial port is solved, the output of the start information of the CPU debugging serial port is realized through the inherent system universal serial port of the operating system, the workload and the difficulty of fault diagnosis and positioning of the operating system are reduced, the fault recovery time of the operating system is shortened, and the fault processing efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort. In the drawings:
FIG. 1 is a schematic diagram of an operating system for transmitting debug start information based on a universal serial port;
FIG. 2 is a schematic diagram of a selector switch module;
FIG. 3 is a schematic diagram of a mode control module;
FIG. 4 is a schematic diagram of a power-up sequence for an emergency diagnostic receiver;
fig. 5 is a schematic flow chart of a method for transmitting debugging start information based on a universal serial port.
Detailed Description
Because the general serial port of the computer can not output the starting information of the CPU debugging serial port at present, the initialization information of bottom hardware on the debugging serial port can not be conveniently and quickly obtained when fault diagnosis is carried out in practical application, the workload and the difficulty of fault diagnosis positioning are increased, and the fault recovery efficiency is reduced.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and the accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limiting the present invention.
Example 1
This embodiment provides an operating system based on universal serial port transmission debugging start information, as shown in fig. 1, including: a processing unit and a programmable logic unit;
the processing unit includes: the CPU universal serial port, the CPU debugging serial port and the BIOS setting module; the programmable logic unit comprises a selection switch module;
the selection switch module is used for selectively connecting the system universal serial port with the CPU universal serial port or connecting the system universal serial port with the CPU debugging serial port according to the mode command of the BIOS setting module.
As shown in fig. 2, the selection switch module includes: the logic command input end, a first buffer, a second buffer, a first double-pole double-throw switch and a second double-pole double-throw switch; a logic command input end SEL receives a mode command of a BIOS setting module;
a first fixed end of the first double-pole double-throw switch is connected to a CPU debugging serial port, a second fixed end is connected to a system general serial port, and a logic command input end SEL is connected to a movable end of the first double-pole double-throw switch through a first buffer;
the first fixed end of the second double-pole double-throw switch is connected to the general serial port of the CPU, the second fixed end of the second double-pole double-throw switch is connected to the general serial port of the system, and the logic command input end SEL is connected to the movable end of the second double-pole double-throw switch through the second buffer.
Under SEL control, the connection between the CPU debugging serial port or the CPU general serial port and the system general serial port is realized. When the SEL is logic 1, the running serial port is a CPU general serial port, and when the SEL is logic 0, the running serial port is a CPU debugging serial port.
The programmable logic unit further includes a mode control module, as shown in fig. 3, the mode control module includes: a command parser and a controller;
the command parser is connected with the BIOS setting module through communication buses such as SPI, I2C and LBC, and the command parser is used for parsing mode commands of the BIOS setting module;
the controller is connected between the command parser and the selection switch module and used for controlling the selection switch module according to the mode command.
The mode control module further comprises an emergency diagnostic mode controller; the emergency diagnosis mode controller is connected with the controller,
the controller is used for receiving an external emergency diagnosis command, and inputting the emergency diagnosis command to the logic command input end based on the external emergency diagnosis command, wherein the emergency diagnosis command is a universal serial port of the connecting system and a CPU debugging serial port.
Under the default condition, a CPU universal serial port of the processor is connected with a system universal serial port;
after an operating system where the universal serial port is located is powered on, firstly enabling the emergency diagnosis mode controller to search an external emergency diagnosis command, executing a process A and then powering on the processor;
process A: when the operating system where the universal serial port is located receives an external emergency diagnosis command, the debugging serial port of the processor is connected with the universal serial port of the system.
Fig. 4 shows a schematic diagram of a power-on sequence of the emergency diagnosis mode controller, in which a power supply is connected to the emergency diagnosis mode controller and a CPU processor unit, and a relay T1 is installed between the power supply and the CPU processor unit, and the emergency diagnosis mode controller powers on the processor after receiving an external emergency diagnosis command and executing a process a.
The external emergency diagnosis command is a segment of 32-bit data which is repeatedly sent to the equipment at 115200 baud rate from an external universal data serial port to a TxD cable of an operating system.
The design method for outputting the starting information of the CPU debugging serial port on the universal serial port line solves the problem that the starting information of the debugging serial port of the processor cannot be conveniently acquired when the computer equipment is diagnosed, not only reduces the workload and difficulty of fault diagnosis positioning, but also shortens the fault recovery time and improves the fault processing efficiency.
Example 2
Based on the previous embodiment, this embodiment provides a method for transmitting debug start information based on a universal serial port, as shown in fig. 5, including the steps of:
step one, configuring a mode:
configuring a first mode as a diagnosis mode and a second mode as a user mode in an operating system in which a system universal serial port is positioned;
step two, the processor generates a mode instruction;
step three, selecting to switch on a CPU debugging serial port or a CPU general serial port of the processor based on the mode instruction:
under the instruction of a diagnosis mode, connecting the CPU debugging serial port with the system general serial port;
and under the instruction of the user mode, connecting the universal serial port of the CPU with the universal serial port of the system.
The third step comprises:
configuring a serial port line selection switch in an operating system where the universal serial port is located;
when the serial port line selection switch receives the diagnosis mode instruction, a path where the CPU debugging serial port and the system general serial port are located is closed;
and when the serial port line selection switch receives the user mode instruction, closing a passage where the CPU universal serial port and the system universal serial port are located.
Before the second step, the following steps are also included:
under the default condition, setting a universal serial port of a processor to be connected with a universal serial port of a system;
after an operating system where the universal serial port is located is powered on, searching an external emergency diagnosis command, executing a process A and then powering on a processor;
process A: when the operating system where the universal serial port is located receives an external emergency diagnosis command, the debugging serial port of the processor is connected with the universal serial port of the system.
The external emergency diagnosis command is a section of 32-bit data which is repeatedly sent to the equipment from an external universal data serial port to a TxD (transmit data) line of a system universal serial port at 115200 baud rate.
When an external emergency diagnosis command is received, detecting whether a TxD cable of a universal serial port of the system is changed to a waveform on the equipment or not, if so, decoding the waveform to see whether the TxD cable is a command of an emergency diagnosis mode or not, otherwise, directly powering on a processor and entering the step two.
According to the embodiment, the hardware initialization starting information of the CPU debugging serial port can be output on the universal serial port of the system, the problem that the hardware bottom layer of an operating system and a software layer cannot be positioned is solved, and the equipment fault analysis efficiency is improved.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides an operating system based on general serial ports transmission debugging start information which characterized in that includes: a processing unit and a programmable logic unit;
the processing unit includes: the CPU universal serial port, the CPU debugging serial port and the BIOS setting module; the programmable logic unit comprises a selection switch module;
the selection switch module is used for selectively connecting the system universal serial port with the CPU universal serial port or connecting the system universal serial port with the CPU debugging serial port according to the mode command of the BIOS setting module.
2. The operating system for transmitting debugging start information based on universal serial port according to claim 1,
the selection switch module includes: the logic command input end, the first buffer, the second buffer, the first double-pole double-throw switch and the second double-pole double-throw switch; the logic command input end receives a mode command of the BIOS setting module;
the first fixed end of the first double-pole double-throw switch is connected to the CPU debugging serial port, the second fixed end is connected to the system general serial port, and the logic command input end is connected to the movable end of the first double-pole double-throw switch through the first buffer;
the first fixed end of the second double-pole double-throw switch is connected to the general serial port of the CPU, the second fixed end of the second double-pole double-throw switch is connected to the general serial port of the system, and the logic command input end of the second double-pole double-throw switch is connected to the moving end of the second double-pole double-throw switch through a second buffer.
3. The operating system for transmitting debugging start information based on the universal serial port according to claim 1, wherein the programmable logic unit further comprises a mode control module, and the mode control module comprises: a command parser and a controller;
the command parser is connected with the BIOS setting module through communication buses such as SPI, I2C and LBC, and the command parser is used for parsing a mode command of the BIOS setting module;
the controller is connected between the command parser and the selection switch module and used for controlling the selection switch module according to the mode command.
4. The operating system for transmitting debugging start-up information based on the universal serial port according to claim 3, wherein the mode control module further comprises an emergency diagnosis mode controller; the emergency diagnosis mode controller is connected with the controller,
the emergency diagnosis mode controller is used for receiving an external emergency diagnosis command, and the controller also inputs the emergency diagnosis command to the logic command input end based on the external emergency diagnosis command, wherein the emergency diagnosis command is a universal serial port of a connecting system and a CPU debugging serial port.
5. The operating system for transmitting debugging start-up information based on the universal serial port according to claim 4, wherein the external emergency diagnosis command is a section of feature code repeatedly sent from the external universal data serial port to the universal serial port of the operating system.
6. A method for transmitting debugging start information based on a universal serial port is characterized by comprising the following steps:
step one, configuring a mode:
configuring a first mode as a diagnosis mode and a second mode as a user mode in an operating system in which a system universal serial port is positioned;
step two, the processor generates a mode instruction;
step three, selecting to switch on a CPU debugging serial port or a CPU general serial port of the processor based on the mode instruction:
under the instruction of a diagnosis mode, connecting the CPU debugging serial port with the system general serial port;
and under the user mode instruction, connecting the universal serial port of the CPU with the universal serial port of the system.
7. The method for transmitting the debugging start information based on the universal serial port according to claim 6, wherein the third step comprises:
configuring a serial port line selection switch in an operating system where the universal serial port is located;
when the serial port line selection switch receives the diagnosis mode instruction, closing a path where the CPU debugging serial port and the system general serial port are located;
and when the serial port line selection switch receives the user mode instruction, closing a path where the CPU universal serial port and the system universal serial port are located.
8. The method for transmitting the debugging start information based on the universal serial port according to claim 7, further comprising the following steps before the second step:
under the default condition, setting a universal serial port of a processor to be connected with a universal serial port of a system;
after an operating system where the universal serial port is located is powered on, searching an external emergency diagnosis command, executing a process A and then powering on a processor;
process A: when the operating system where the universal serial port is located receives an external emergency diagnosis command, the debugging serial port of the processor is connected with the universal serial port of the system.
9. The method for transmitting the debugging start information based on the universal serial port as claimed in claim 8, wherein the external emergency diagnosis command is a section of feature code repeatedly sent from the external universal data serial port to the system universal serial port.
10. The method for transmitting the debugging start information based on the universal serial port according to claim 9, wherein when an external emergency diagnosis command is received, it is detected whether a waveform of a data line of the universal serial port of the system is changed, if so, the waveform is decoded to see whether the command is an emergency diagnosis mode, otherwise, the processor is directly powered on and the step two is performed.
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