WO2021109707A1

WO2021109707A1 - Multi-module communication control method and respiratory support device

Info

Publication number: WO2021109707A1
Application number: PCT/CN2020/119262
Authority: WO
Inventors: 戴征; 刘择善
Original assignee: 湖南明康中锦医疗科技发展有限公司
Priority date: 2019-12-02
Filing date: 2020-09-30
Publication date: 2021-06-10
Also published as: CN111110966B; CN111110966A

Abstract

Disclosed in the present invention are a multi-module communication control method and a respiratory support device. The multi-module communication control method is used for realizing data communication between a master control module, and a data acquisition module and a data display module. The master control module comprises a first CPU, a memory, a DMA controller, a first serial port, and a second serial port; the data acquisition module is connected to the first serial port; the data display module is connected to the second serial port; the first serial port and the second serial port have a transceiver buffer. The multi-module communication control method comprises: setting a first memory block and a second memory block in the memory, establishing a first DMA receiving channel and a first DMA sending channel between the data acquisition module and the first memory block, and establishing a second DMA receiving channel and a second DMA sending channel between the second memory block and the data display module, so that data transmission can be completed without participation of the first CPU, thereby improving the speed and efficiency of data communication.

Description

Multi-module communication control method and respiratory support equipment

Technical field

The invention belongs to the technical field of medical equipment, and specifically relates to a multi-module communication control method and respiratory support equipment.

Background technique

In modern clinical medicine, the ventilator, as an effective means to artificially replace the autonomous ventilation function, has been commonly used in various causes of respiratory failure, anesthesia breathing management during major operations, respiratory support treatment and emergency recovery. It occupies a very important position in the field of modern medicine. Medical ventilator is a vital medical device that can prevent and treat respiratory failure, reduce complications, save and prolong the lives of patients.

At present, the development of medical ventilators is geared to the development of large screens and intelligence. The traditional ventilators have added high-definition touch screens and introduced network cloud platforms. The internal structure of the ventilators will inevitably become more complex. Some breathing parameter acquisition modules perform collaborative processing. The original control module in the ventilator is taking on more and more tasks, and the burden of the communication data interface is getting heavier. Therefore, there is an increasing need for a stable and efficient communication processing method. .

In the prior art, the ventilator has the following three communication methods:

A. The traditional ventilator uses a single processor and is controlled by a single processing module. There is no communication between modules in this type of ventilator;

B. Some ventilators have multiple processing modules inside, and the multiple modules communicate with each other by adding dual-port RAM (Random Access Memory) and using shared memory;

C. Some ventilators are equipped with multiple processing modules, and the multiple modules communicate with each other through physical interfaces such as peripheral serial ports and spi ports, using communication protocols.

In view of the current trend of ventilators developing towards large screens, intelligence and cloud interconnection, the existing three communication schemes above have at least the following shortcomings:

Solution A is a single module solution, which requires high performance of its modules. If multiple transactions are involved, it will increase the complexity of software and hardware, and the stability and real-time performance of the system will be greatly reduced, and it is not conducive to future upgrades and expansions. . Scheme B, although the communication speed is fast, but its cost is high. Scheme C uses traditional communication methods to save costs, but relatively speaking, the software development overhead is relatively large, it needs to occupy a large amount of system resources, and the speed of data communication interaction also has certain limitations.

Summary of the invention

The main purpose of the present invention is to provide a multi-module communication control method, which aims to solve the problem of slow communication speed between modules in the existing multi-module respiratory support device and occupying a lot of system resources.

In order to achieve the above objective, the present invention proposes a multi-module communication control method for realizing data communication between a main control module, a data acquisition module, and a data display module. The main control module includes a first CPU, a memory, a DMA controller, The first serial port and the second serial port, the data acquisition module is connected to the first serial port, and the data display module is connected to the second serial port. The first serial port and the second serial port have a transceiver buffer,

It includes the following steps:

S1, configure the first serial port and the second serial port to DMA mode,

S2, open up the first memory block and the second memory block in the memory,

S3. Set the destination address of the first DMA receiving channel to the first serial port transceiver buffer address, and set the source address of the first DMA receiving channel to the first serial port receiving address, so that the first DMA receiving channel can receive data,

Set the destination address of the first DMA transmission channel to the transmission address of the first serial port, and set the source address of the first DMA transmission channel to the transceiver buffer address of the first serial port, and enable the first DMA transmission channel to send data,

Set the destination address of the second DMA receiving channel to the second serial port transceiver buffer address, and set the source address of the second DMA receiving channel to the second serial port receiving address, so that the second DMA channel can receive data,

Set the destination address of the second DMA transmission channel as the transmission address of the second serial port, and set the source address of the second DMA transmission channel as the transceiver buffer address, so that the second transmission DMA channel can send data,

S4, start the main control module and the data acquisition module, the data acquisition module starts to collect data, the transceiver buffer starts to receive the data sent by the data acquisition module,

The first DMA channel transmits the data in the receiving and sending buffer to the first memory block,

S5, the first CPU can extract data from the first memory block, process the data, and store the processed data in the first memory block and the second memory block,

S6: When the main control module wants to send data to the data display module, the DMA controller transfers the data in the second memory block to the transceiver buffer of the second serial port, and the data display module obtains it from the transceiver buffer of the second serial port data.

Preferably, the step S4 includes: S41, when the transceiver buffer of the first serial port receives the first frame of data, it generates a data reception signal to notify the DMA controller, and the first CPU receives the signal generated by the DMA controller. , Start data encapsulation detection, and perform CRC check on the first frame of data to determine the correctness of the data and prevent data errors due to interference. If the CRC check is passed and the first frame of data has no errors during transmission, then In the next step, if there is an error in the first frame of data during transmission, it proves that there may be an abnormality in the data acquisition module. The data is discarded and the abnormal count is started. When the abnormal count reaches a certain threshold, the main control module and the data acquisition module Enter the exception handling mode by itself.

Preferably, the step S4 further includes:

S42: After step S41, the first CPU parses the data in the first serial port transceiver buffer according to the preset protocol, extracts the memory block code, judges the extracted memory block code, and stores the data according to the memory block code To the first memory block.

Preferably, the step S42 includes:

S421: According to the preset protocol, extract the memory block attribute code in the first serial port transceiver buffer, and according to the memory block attribute code, the first CPU directly copies the piece of data to the corresponding position in the first memory block;

S422: The first CPU obtains data from the first memory block for processing according to the requirements of the breathing algorithm.

Preferably, a timer is provided in the main control module, and the step S6 includes:

S61: The timer generates a trigger request signal at regular intervals, and the DMA controller successively acquires the data in the second memory block according to the trigger request signal.

Preferably, the step S6 further includes:

S62: The DMA controller encapsulates the data in the second memory block and then stores it in the transceiver buffer of the second serial port.

Preferably, the multi-module communication control method is applied to a respiratory support device, the data acquisition module has a second CPU, the data acquisition module is connected with a sensor device and an action execution device, and the data display module has a third CPU , The data display module is connected with a display device, an input device and an audible and visual alarm device.

Preferably, when the communication between the main control module and the data collection module fails, the main control module can directly obtain data from the sensor device and the action execution device; when the main control module and the data acquisition module When the communication between the data display modules fails, the main control module can directly send the processed data to the display device, the input device and the sound and light alarm device.

The present invention also proposes a breathing support device, including: data communication between a main control module, a data acquisition module, and a data display module. The main control module includes a first CPU, a memory, a DMA controller, a first serial port, and a second serial port. , The data acquisition module is connected to a first serial port, the data display module is connected to a second serial port, the first serial port and the second serial port have a transceiver buffer; in the memory, a first memory block and a second A memory block, a first DMA receiving channel and a first DMA sending channel are arranged between the data acquisition module and the first memory block, and a second DMA is arranged between the data display module and the second memory block The receiving channel and the second DMA sending channel.

Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

First, the present invention adds direct memory access technology to the traditional communication mode of the ventilator to realize the simplicity of communication interaction. Through the direct memory access technology on the controller, each module does not need much time to pay attention to the communication problems. Control, with embedded operating system, can achieve high-speed communication without intervention.

Second, the present invention encapsulates communication so that each module operates like its own memory when acquiring data from other modules, avoiding complicated communication protocols. When data is received through each DMA channel, it must be unencapsulated and sent. Encapsulation realizes the efficiency and stability of communication interaction. The data transmission is carried out through the design of the protocol and in accordance with the designed memory data transmission method, so that the data transmitted by the main control module to other peripheral modules is like accessing the memory; and , The protocol used for data reception and transmission is not complicated, which avoids the time of grouping and unpacking. When the data is received, the correctness and integrity of the data can be guaranteed through the crc validation, making the communication efficient and stable.

Third, the present invention is also designed with a backup control. When an abnormal error occurs in the current communication, through the backup control, the ventilator can maintain basic breathing support and sound and light alarms to prompt the user to deal with the current abnormality, through the error prevention mechanism and system The above backup control scheme also improves the security of data transmission. When the module fails to communicate, the whole system can still maintain the basic operating state of the ventilator to facilitate subsequent processing measures.

Fourth, the present invention introduces communication control algorithm logic into the traditional multi-module ventilator without increasing the hardware cost. Under the condition of the combination of software and hardware, fast data interaction can be realized. The communication can be achieved through DMA+timer. Basically no intervention is required, which improves communication efficiency and enables data to be updated in a timely manner; this method has been used in products currently under development, and overall has the advantages of simple communication control, efficient and stable data transmission, and system security.

Fifth, the present invention packs all the communication methods and data processing methods, so that the communication between two independent modules becomes simple. The design of the upper layer does not need to pay attention to how the bottom communicates, and the data between the two modules is as if they read their own The memory is the same, as long as it is agreed on how the data in the memory block is arranged, the data between the two modules will automatically interact to keep up-to-date, which improves the communication efficiency between the modules.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on the structure shown in these drawings.

Fig. 1 is a structural block diagram of a multi-module communication control method proposed by an embodiment of the present invention applied to a respiratory support device;

Fig. 2 is a control principle diagram 1 of the multi-module communication control method proposed in Fig. 1;

Fig. 3 is the second control principle diagram of the multi-module communication control method proposed in Fig. 1;

Fig. 4 is a flow chart of the steps of the multi-module communication control method proposed in Fig. 1.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the difference between components in a specific posture (as shown in the accompanying drawings). If the relative position relationship, movement situation, etc. change, the directional indication will change accordingly.

In addition, in the present invention, descriptions involving "first", "second", etc. are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "connected", "fixed", etc. should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or a whole; It is a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between two components or the interaction relationship between two components, unless specifically defined otherwise. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present invention can be understood according to specific situations.

In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but they must be based on what can be achieved by a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be regarded as a combination of such technical solutions. It does not exist, nor does it fall within the scope of protection claimed by the present invention.

The present invention provides a multi-module communication control method and respiratory support equipment.

Please refer to Figures 1 to 4, the present invention proposes a multi-module communication control method, which is mainly used in respiratory support equipment. The respiratory support equipment is equipped with a main control module and peripheral modules. The peripheral modules include data acquisition modules and data. The display module, the present invention is used to realize the data communication between the main control module and the peripheral module. The multi-module communication method is based on the serial port and combined with the DMA technology (Direct Memory Access).

The main control module includes a first CPU, a memory, a DMA controller, a first serial port and a second serial port, and the first serial port and the second serial port have a transceiver buffer. The data acquisition module has a second CPU, the data acquisition module is connected to the main control module through the first serial port, and the data acquisition module is connected with sensor equipment and action execution equipment. The sensor equipment is used to collect the user's inhalation and exhalation pressure and process. Data, the action execution device is used to adjust parameters such as the opening of the breathing valve under the control of the main control module. The data display module has a third CPU, the data display module is connected to the main control module through the second serial port, and the data display module is connected with sound and light alarm devices, display devices and input devices. The sound and light alarm devices are used to remind users when the ventilator is abnormal. Handle current abnormalities in a timely manner, and display equipment and input equipment enable customers to intelligently control and monitor the ventilator.

The multi-module communication control method specifically includes the following steps:

S1, configure the first serial port and the second serial port to DMA mode;

S2, open up the first memory block and the second memory block in the memory;

S3, initialize the DMA controller,

Set the destination address of the first DMA receiving channel to the first serial port transceiver buffer address, and set the source address of the first DMA receiving channel to the first serial port receiving address, so that the first DMA receiving channel can receive data,

Set the destination address of the second DMA transmission channel as the transmission address of the second serial port, and set the source address of the second DMA transmission channel as the transceiver buffer address, so that the second transmission DMA channel can send data;

S4, start the main control module and the data acquisition module, the main control module starts to collect data, the transceiver buffer starts to receive the data sent by the data acquisition module, and the first DMA channel transmits the data in the transceiver buffer to the first memory block;

among them:

S41. When the transceiver buffer receives the first frame of data, it will generate a data reception signal to notify the DMA controller. After receiving the signal generated by the DMA controller, the first CPU starts data encapsulation detection and performs CRC on the first frame of data. Check is used to determine the correctness of the data and prevent data errors due to interference. If the CRC check is passed and the first frame of data has no errors during the transmission process, proceed to the next step. If the first frame of data is in the transmission process If an error occurs, it proves that the data acquisition module may be abnormal, the data is discarded, and the abnormal count is started. When the abnormal count reaches a certain threshold, the main control module and the data acquisition module themselves enter the abnormal processing mode;

S42. After step S41, the first CPU parses the data in the sending and receiving buffer according to the preset protocol, extracts the memory block code, determines the extracted memory block code, and stores the data in the first memory block code according to the memory block code. Memory block.

S5. The first CPU extracts data from the first memory block, processes the data, and stores the processed data in the first memory block and the second memory block.

Regarding the settings of the first memory block and the second memory block: The sensor device collects some analog raw data. After the data acquisition module obtains these data, it will perform some basic breathing algorithm calculations through the first CPU to obtain the pressure Basic data such as control value and flow control value are placed in the first memory block, so that when the device connected to the data acquisition module needs to obtain these basic data, it can be obtained directly through the first serial port and the corresponding first DMA channel These data without the participation of the first CPU;

Due to user needs, such as monitoring or evaluation needs, the data to be displayed in the data display module also includes other comprehensive data such as respiratory rate. These comprehensive data to be displayed are further calculated by the first CPU based on the basic data through related algorithms. It is obtained and stored in the second memory block, so that when the user wants to obtain these comprehensive data on the data display module side, it can be obtained through the second serial port and the corresponding second DMA channel, and the first CPU is also not required. Participation;

Therefore, in the present invention, not only the two-way communication between the data acquisition module and the main control module is realized, but also the two-way communication between the main control module and the data display module is realized.

S6: There is a timer in the main control module. The timer generates a trigger request signal through timing control. When the time is up, the DMA controller will perform the first memory block and the second memory block according to the preset protocol according to the trigger request signal. The data in the block is encapsulated and then stored in the transceiver buffer.

The present invention adds DMA technology to the traditional serial communication mode. DMA is a hardware mechanism that allows two-way data transmission between peripherals and system memory without the participation of the CPU. Using DMA can make the system CPU from the actual I/ O get rid of the data transmission process, thereby greatly improving the throughput rate of the system. The data transmission in the DMA mode is controlled by the DMA controller. During the transmission, the first CPU of the main control module can perform other tasks concurrently. When the DMA ends, the DMA controller informs the first CPU that the data transmission has ended through an interrupt. The first CPU executes the corresponding interrupt service program for subsequent processing.

The first serial port has a transceiver buffer, and the second serial port also has a transceiver buffer, which is independent for each DMA channel. The main control module is equipped with a timer. For the transceiver buffer of the first serial port, data can be stored in the first memory block according to the timing trigger request of the timer, and for the transceiver buffer of the second serial port; it can be based on the same timer. Timing triggers the request to store data in the second memory block; another timer can also be used to trigger the storage of data in the second memory block. In this way, the parameter data of the sensor devices, actuator devices, etc. connected to the data acquisition module can be transmitted to the first memory block in time, and the various comprehensive parameters obtained by the main control module through the breathing algorithm can also be updated to the first memory block in time. In the second memory block, the display device connected to the data display module can obtain all the desired data in time.

Further, the data acquisition module has a second CPU, the data acquisition module is connected with a sensor device and an action execution device, the data display module has a third CPU, and the data display module is connected with a display device, an input device, and an audible and visual alarm device , Both the data acquisition module and the data display module are equivalent to single-chip microcomputer modules with independent processing capabilities. In this multi-module communication control method, the main control module can also perform backup control. When the communication between the main control module and the data acquisition module fails, the main control module can directly obtain from the sensor device and the execution device of the action. Data; when the communication between the main control module and the data display module fails, the main control module can directly send the data processed by it to the sound and light alarm device. Therefore, when the current communication method through the DMA channel fails, the respiratory support device can maintain basic respiratory support through backup control, and can also realize the sound and light alarm function.

During the use of the ventilator, it cannot be shut down directly because the communication between the data acquisition module and the main control module fails. The design of the backup control in this method enables the data acquisition unit to fail when the system uses DMA for data communication. It can obtain the data collected by the sensor device, and can also control the actuators to perform action output and perform basic ventilation functions. It can also directly transmit the communication control signal to the sound and light when the communication between the main control module and the data display module fails. The alarm device performs an audible alarm to remind the user that the current DMA communication has been disconnected, which improves the safety of the ventilator.

Specifically, in this embodiment, the first CPU may use the AT91SAM9G45 chip, and the memory may use the samsung k4t51163qq bce7 chip.

Further, the step S42 includes:

S421. Extract the attribute code of the memory block in the receiving buffer according to the preset protocol; for example, if the received attribute code is 1, then the first CPU directly copies the piece of data to the corresponding position in the first memory block.

S422: The first CPU obtains data for processing; for example, the breathing algorithm requires the current pressure and flow to perform related processing, and the CPU directly reads the data at the corresponding position in the first memory block.

For the communication between the data display module and the main control module, when the data display module wants to obtain data from the second memory block of the main control module, it is obtained in the same way as step S42, that is, it is also obtained through a preset protocol , Extract the memory block attribute code of the data in the transceiver buffer of the second serial port, for example, if the received attribute code is 2, then the first CPU directly copies the above basic data to the second memory block, and the second serial port directly according to the attribute Encoding 2 can obtain the data packet of the entire basic data corresponding to 2 and send these data to a display device for display, which greatly improves the efficiency of data communication.

When the data acquisition module receives data and the data display module sends data, the data must be encapsulated or unsealed according to the designed communication protocol. The protocol is as shown in the figure below.

Among them, len is the length of the data packet, type defines the attributes of the memory block to be transmitted (for example, 1 means sensor collection data), data memory block data, and checksum is validation. The protocol designed in the present invention mainly defines the attribute code of the memory block. The reception of data between the data acquisition module and the first memory block should be encapsulated according to a preset protocol, the transmission of data should be unpacked according to the preset protocol, and the data between the second memory block and the data display module should be unpacked according to the preset protocol. Reception should also be encapsulated according to a preset protocol, and data transmission should also be unencapsulated according to the preset protocol. Through the design of this protocol, the data is received and sent in accordance with this protocol. Each time the data is transmitted in the memory block, the correctness of the data is controlled through the validation, and the corresponding memory block data is overwritten after receiving, that is, when the communication parties access the corresponding data It is the same as accessing data in its own memory to achieve the function of sharing memory between modules.

The above are only the preferred embodiments of the present invention, and do not limit the scope of the present invention. Under the inventive concept of the present invention, equivalent structural transformations made by using the contents of the description and drawings of the present invention, or direct/indirect use Other related technical fields are included in the scope of patent protection of the present invention.

Claims

A multi-module communication control method, characterized in that it is used to implement data communication between a main control module, a data acquisition module, and a data display module. The main control module includes a first CPU, a memory, a DMA controller, a first serial port, and a The second serial port, the data acquisition module is connected to the first serial port, the data display module is connected to the second serial port, and the first serial port and the second serial port have transceiver buffers,

It includes the following steps:

S1, configure the first serial port and the second serial port to DMA mode,

S2, open up the first memory block and the second memory block in the memory,

S3. Set the destination address of the first DMA receiving channel to the first serial port transceiver buffer address, and set the source address of the first DMA receiving channel to the first serial port receiving address, so that the first DMA receiving channel can receive data,

Set the destination address of the first DMA transmission channel to the transmission address of the first serial port, and set the source address of the first DMA transmission channel to the transceiver buffer address of the first serial port, and enable the first DMA transmission channel to send data,

Set the destination address of the second DMA receiving channel to the second serial port transceiver buffer address, and set the source address of the second DMA receiving channel to the second serial port receiving address, so that the second DMA channel can receive data,

Set the destination address of the second DMA transmission channel as the transmission address of the second serial port, and set the source address of the second DMA transmission channel as the transceiver buffer address, so that the second transmission DMA channel can send data,

S4. Start the main control module and the data acquisition module, the data acquisition module starts to collect data, and the transceiver buffer starts to receive the data sent by the data acquisition module.

The first DMA channel transmits the data in the receiving and sending buffer to the first memory block,

S5, the first CPU can extract data from the first memory block, process the data, and store the processed data in the first memory block and the second memory block,

S6: When the main control module wants to send data to the data display module, the DMA controller transfers the data in the second memory block to the transceiver buffer of the second serial port, and the data display module obtains it from the transceiver buffer of the second serial port data.
The multi-module communication control method according to claim 1, wherein the step S4 comprises: S41, when the transceiver buffer of the first serial port receives the first frame of data, it generates a data reception signal to notify the DMA controller After the first CPU receives the signal generated by the DMA controller, it starts the data encapsulation test and performs a CRC check on the first frame of data to determine the correctness of the data and prevent data errors due to interference. If it passes the CRC check If there is no error in the first frame of data during transmission, proceed to the next step. If an error occurs in the first frame of data during transmission, it proves that there may be an abnormality in the data acquisition module. The data is discarded and the abnormal count is started. When the abnormal count reaches a certain threshold, the main control module and the data acquisition module themselves enter the abnormal processing mode.
The multi-module communication control method according to claim 2, wherein the step S4 further comprises:

S42: After step S41, the first CPU parses the data in the first serial port transceiver buffer according to the preset protocol, extracts the memory block code, judges the extracted memory block code, and stores the data according to the memory block code To the first memory block.
The multi-module communication control method according to claim 3, wherein the step S42 comprises:

S421: According to the preset protocol, extract the memory block attribute code in the first serial port transceiver buffer, and according to the memory block attribute code, the first CPU directly copies the piece of data to the corresponding position in the first memory block;

S422: The first CPU obtains data from the first memory block for processing according to the requirements of the breathing algorithm.
The multi-module communication control method according to claim 4, wherein the main control module is provided with a timer, and the step S6 includes:

S61: The timer generates a trigger request signal at regular intervals, and the DMA controller successively acquires the data in the second memory block according to the trigger request signal.
The multi-module communication control method according to claim 5, wherein said step S6 further comprises:

S62: The DMA controller encapsulates the data in the second memory block and then stores it in the transceiver buffer of the second serial port.
The multi-module communication control method according to claim 6, wherein the data acquisition module has a second CPU, and the data acquisition module is connected with a sensor device and an action execution device, and is applied to a respiratory support device. The data display module has a third CPU, and the data display module is connected with a display device, an input device, and a sound and light alarm device.
The multi-module communication control method of claim 7, wherein when the communication between the main control module and the data acquisition module fails, the main control module can directly communicate with the sensor device The execution device obtains data; when the communication between the main control module and the data display module fails, the main control module can directly send the processed data to the display device, input device, and sound and light alarm device .
A breathing support device, characterized by comprising: data communication between a main control module, a data acquisition module, and a data display module, the main control module including a first CPU, a memory, a DMA controller, a first serial port, and a second serial port , The data acquisition module is connected to a first serial port, the data display module is connected to a second serial port, the first serial port and the second serial port have a transceiver buffer; a first memory block and a second serial port are created in the memory A memory block, a first DMA receiving channel and a first DMA sending channel are arranged between the data acquisition module and the first memory block, and a second DMA is arranged between the data display module and the second memory block The receiving channel and the second DMA sending channel.