CN208834179U

CN208834179U - Embedded control system based on ARM platform

Info

Publication number: CN208834179U
Application number: CN201820583957.7U
Authority: CN
Inventors: 胡正胜
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-04-24
Filing date: 2018-04-24
Publication date: 2019-05-07
Anticipated expiration: 2028-04-24

Abstract

The utility model discloses a kind of embedded control systems based on ARM platform, including control panel, onboard CPU processor, CAN controller, GPIO module, serial ports expansion module, RS422 level switch module, RS232 level conversion module, AD conversion module, D/A conversion module, RD conversion module, ferroelectric memory, level drive module, CPLD and power module on the control panel.For the utility model using LPC2119 chip as processor, onboard various acquisition modules realize the acquisition of external status information, and better performances.At the same time, using filter circuit design, effective filtering to power supply noise is realized.

Description

Embedded control system based on ARM platform

Technical field

The utility model relates to a kind of embedded control systems based on ARM platform.

Background technique

The application field of embedded system develops rapidly in breadth and depth in recent years, under traditional desktop environments Exploitation it is different, embedded system is the system for being directly facing the software and hardware combining of application.The diversity of application makes hardware flat Platform is usually different.But various control panels on the market are in the acquisition and processing of external status information at present, performance compared with Difference.

Utility model content

The purpose of the utility model is to overcome the technical problems present on, provide a kind of insertion based on ARM platform Formula control system.

To achieve the above object, the utility model adopts the following technical solutions:

Based on the embedded control system of ARM platform, including control panel, onboard CPU processor, CAN on the control panel Controller, GPIO module, serial ports expansion module, RS422 level switch module, RS232 level conversion module, AD conversion module, D/A conversion module, R2D conversion module, ferroelectric memory, level drive module, CPLD and power module；The CAN controller, GPIO module, serial ports expansion module, RS422 level switch module, RS232 level conversion module, AD conversion module, DA conversion Module, RD conversion module, ferroelectric memory, level drive module, CPLD are electrically connected with the CPU processor；The electricity Source module is used to provide working power to entire control system.It is also onboard on the control panel to have filter circuit, the filtered electrical Road and the power module are electrically connected.The filter circuit includes transformer T₁, rectifier bridge D₁, transistor amplifier Q₁, electricity Hinder R₀, resistance R₁, capacitor C₁With capacitor C₂, specific connection relationship are as follows: AC power source passes through transformer T₁After carrying out the range of decrease, then pass through Over commutation bridge D₁It is rectified, is then input to rectifier bridge D₁Crus secunda be connected to transistor amplifier Q₁Collector, and By capacitor C₁Ground connection, rectifier bridge D₁The 4th foot ground connection, in Q₁Collector and Q₁Base stage between be serially connected with resistance R₁, Q₁'s Base stage passes through capacitor C₂Ground connection, Q₁Emitter pass through resistance R₀Ground connection；The CAN controller uses TJA1050T, the CAN Controller end is connected with resistance R18, and the resistance value of the resistance R18 is 120 Ω.

Further, the CPU processor uses LPC2119 chip.

Further, the AD conversion module uses AD7922 chip.

Further, the serial ports expansion module uses SC16C554 chip.

The utility model has the beneficial effects that

1. onboard various acquisition modules realize adopting for external status information using LPC2119 chip as processor Collection, and better performances.

2. using filter circuit design, effective filtering to power supply noise is realized.

Detailed description of the invention

Fig. 1: the circuit structure block diagram of the utility model embodiment one.

Fig. 2: the schematic diagram of CAN controller.

Fig. 3: the circuit structure block diagram of the utility model embodiment two.

Fig. 4: filter circuit schematic diagram.

Specific embodiment

The utility model is described in detail with reference to the accompanying drawings and embodiments.

Embodiment one:

As shown in Figure 1, the embedded control system based on ARM platform, including control panel, onboard CPU on the control panel Processor, CAN controller, GPIO module, serial ports expansion module, RS422 level switch module, RS232 level conversion module, AD Conversion module, D/A conversion module, R2D conversion module, ferroelectric memory, level drive module, CPLD and power module；It is described CAN controller, GPIO module, serial ports expansion module, RS422 level switch module, RS232 level conversion module, AD conversion mould Block, D/A conversion module, RD conversion module, ferroelectric memory, level drive module, CPLD electrically connect with the CPU processor It connects；The power module is used to provide working power to entire control system.

Preferably scheme, the CPU processor is preferably with LPC2119 chip.

Preferably scheme, the AD conversion module use AD7922 chip.

Preferably scheme, the serial ports expansion module use SC16C554 chip.

As shown in Fig. 2, CAN controller is using TJA1050T as the interface between CAN controller and physical bus, i.e. CAN Transceiver, to enhance the differential transmitting capacity to bus and the differential reception ability to CAN controller.The end of CAN bus connects It is connected to resistance R18, and has very important effect to the impedance matching of bus when resistance R18 is 120 Ω through overtesting, this It is a great inventive point.Reliability and anti-interference when otherwise, by very big reduction bus data communication, it could even be possible to Lead to not communicate.

Embodiment two:

As shown in figure 3, unique difference with embodiment one is: it is also onboard on the control panel to have a filter circuit, it is described Filter circuit and the power module are electrically connected.

As shown in figure 4, filter circuit includes transformer T₁, rectifier bridge D₁, transistor amplifier Q₁, resistance R₀, resistance R₁, capacitor C₁With capacitor C₂.Specific connection relationship is: AC power source passes through transformer T₁After carrying out the range of decrease, using rectifier bridge D₁It is rectified, is then input to rectifier bridge D₁Crus secunda be connected to transistor amplifier Q₁Collector, and pass through capacitor C₁Ground connection, rectifier bridge D₁The 4th foot ground connection, in Q₁Collector and Q₁Base stage between be serially connected with resistance R₁, Q₁Base stage pass through Capacitor C₂Ground connection, Q₁Emitter pass through resistance R₀Ground connection.The filter circuit has the function of capacity multiplier, therefore can have Effect is filtered power supply noise.

The CPU processor of the utility model, CAN controller, GPIO module, serial ports expansion module, RS422 level conversion Module, RS232 level conversion module, AD conversion module, D/A conversion module, RD conversion module, ferroelectric memory, level drive mould Block, CPLD and power module, component are universal standard part or component as known to those skilled in the art, and structure and principle are all It can be learnt by technical manual for this technology personnel or be known by routine experiment method, what the utility model mainly solved asks Topic is existing control panel in the acquisition of external status information and handles the poor technical problem of upper performance.

Finally, it should be noted that above embodiments are only to illustrate the utility model and not limit the utility model and retouched The technical solution stated；Therefore, although this specification the utility model is had been carried out referring to above-mentioned each embodiment it is detailed Illustrate, still, those skilled in the art should understand that, it still can modify to the utility model or equally replace It changes；And the technical solution and its improvement of all spirit and scope for not departing from the utility model, it should all cover practical new at this In the scope of the claims of type.

Claims

1. the embedded control system based on ARM platform, which is characterized in that including control panel, on the control panel at onboard CPU Device, CAN controller, GPIO module, serial ports expansion module, RS422 level switch module, RS232 level conversion module, AD is managed to turn Change the mold block, D/A conversion module, RD conversion module, ferroelectric memory, level drive module, CPLD and power module；The CAN control Device processed, GPIO module, serial ports expansion module, RS422 level switch module, RS232 level conversion module, AD conversion module, DA Conversion module, RD conversion module, ferroelectric memory, level drive module, CPLD are electrically connected with the CPU processor；Institute Power module is stated for providing working power to entire control system, it is also onboard on the control panel to have filter circuit, the filter Wave circuit and the power module are electrically connected, and the filter circuit includes transformer T₁, rectifier bridge D₁, transistor amplifier Q₁, resistance R₀, resistance R₁, capacitor C₁With capacitor C₂, specific connection relationship are as follows: AC power source passes through transformer T₁Carry out the range of decrease Afterwards, using rectifier bridge D₁It is rectified, is then input to rectifier bridge D₁Crus secunda be connected to transistor amplifier Q₁Collection Electrode, and pass through capacitor C₁Ground connection, rectifier bridge D₁The 4th foot ground connection, in Q₁Collector and Q₁Base stage between be serially connected with electricity Hinder R₁, Q₁Base stage pass through capacitor C₂Ground connection, Q₁Emitter pass through resistance R₀Ground connection；The CAN controller uses TJA1050T, The CAN controller end is connected with resistance R18, and the resistance value of the resistance R18 is 120 Ω.

2. the embedded control system according to claim 1 based on ARM platform, which is characterized in that the CPU processor Using LPC2119 chip.

3. the embedded control system according to claim 1 based on ARM platform, which is characterized in that the AD conversion mould Block uses AD7922 chip.

4. the embedded control system according to claim 1 based on ARM platform, which is characterized in that the serial ports expansion Module uses SC16C554 chip.