CN208862872U - A kind of side channel signal automated collection systems towards IOT terminal - Google Patents
A kind of side channel signal automated collection systems towards IOT terminal Download PDFInfo
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Abstract
The side channel signal automated collection systems towards IOT terminal of the utility model, including side channel information analog input card, oscillograph and PC machine, be characterized in that: side channel information analog input card is made of main control module, reset control circuit, communication control circuit, energy mark Acquisition Circuit, reset control circuit controls reset/trigger signal low and high level, and communication control circuit controls the on-off communicated between main control module and FLASH.The side channel signal automated collection systems of the utility model are, it can be achieved that automatic collection to energy mark signal in tested object firmware upgrade process, convenient for analyzing to whether there is side-channel attack loophole in IOT terminal device firmware upgrade process.
Description
Technical field
The utility model relates to a kind of side channel signal automated collection systems, more specifically, more particularly to it is a kind of towards
The side channel signal automated collection systems of IOT terminal.
Background technique
With the fast development of Internet of Things (IOT), the application field of IOT terminal device is very extensive.Technology of Internet of things is
People's lives bring great convenience.People can be with remote monitoring and control IOT terminal device by cell phone application.But therewith
The safety problem come also becomes increasingly conspicuous, and security incident emerges one after another.CCTV13 channel was once produced: smart television is hacked and intelligence
Camera is by the event of malicious intrusions.2016 end of the year hackers utilize a large amount of internet of things equipment, have initiated DDOS attack, have caused more
The well-known website of family can not access.2017, cryptography expert Shamir team was realized based on side Channel Technology by aircraft
On-air radio firmware upgrade, to attack Philips Hue intelligent lamp.
For IOT terminal device due to the limitation of own resource, cost, power consumption, attacker relatively easily utilizes equipment
Side-channel attack is implemented in the physics leakage (such as: energy, electromagnetism, sound, time, light) generated in calculating process, to IOT equipment
Safety cause great threat.Internet of Things scale deployment is faced with numerous challenges.When numerous internet of things equipment needs function
When can update or repair loophole, wireless (OTA) firmware upgrade will become an important time saving, convenient and fast function.OTA is solid
Part upgrading has become the indispensable component part of internet of things equipment.
The principle of OTA firmware upgrade is that firmware upgrade order is sent to Internet of Things cloud platform by network by terminal APP,
Firmware updating is sent to router and bridge by network by Internet of Things cloud platform, and firmware updating is sent to IOT terminal by bridge
Equipment.The firmware received is decrypted IOT terminal device and authentication operation, generates authentication code, then according to authentication code, judgement
Whether the firmware has upgrade service permission.If Service Privileges certification passes through, firmware updating programming is entered into IOT terminal device
In, and return to the successful result of firmware upgrade.If authentification failure, the result of firmware upgrade failure is directly returned.
During IOT terminal device firmware upgrade, if there is the leakage of firmware encrypting, the side Multiple Channel Analysis of certification
Hole, attacker can analyze decruption key and authentication key, to obtain firmware upgrade by side-channel attack method
Authentication service permission.And then malice firmware is generated, malice firmware is then downloaded into IOT terminal by way of firmware upgrade
In, it is illegally controlled, so as to cause DDOS similar to serious network safety event.
This patent provides automation for side-channel attack loophole present in IOT terminal device firmware upgrade process
Side channel information acquisition system, for IOT terminal device preventing side-channel attack safety carry out analysis and assessment.The platform
It with friendly interface between software and hardware, can be communicated with the side Multiple Channel Analysis software of mainstream, energy automation collection simultaneously uploads energy
Measure mark sampled data.The utility model patent provides for the assessment of side channel safety in IOT terminal device firmware upgrade process
The side channel information acquisition platform of automation.The acquisition platform simple, good compatibility, the energy mark noise of acquisition with interface
Than it is high the features such as, provide the analysis signal of high quality for side Multiple Channel Analysis.
Summary of the invention
The utility model in order to overcome the shortcomings of the above technical problems, provides a kind of side channel letter towards IOT terminal
Number automated collection systems.
The side channel signal automated collection systems towards IOT terminal of the utility model, including side channel information collection plate
Card, oscillograph and PC machine, for PC machine for running side Multiple Channel Analysis application program, side channel information analog input card is tested for acquiring
The energy mark signal in object firmware upgrade process is tried, and is sent in oscillograph；Oscillograph is connected with PC machine through communication line,
Oscillograph converts digital signal for received energy mark signal and is transmitted to PC machine；It is characterized by: the side channel information
Analog input card is by main control module, reset control circuit, communication control circuit, energy mark Acquisition Circuit, filtering and amplifying circuit and confession
Circuit composition, main control module turns TTL module by USB and PC machine communicates to connect；The output end of reset control circuit shape all the way
At the reset line interface being connected with the reset signal of the MCU of tested object, another way forms the touching being connected with oscillograph
Signal, the output end of main control module is connected with the control terminal of reset control circuit, with reset control circuit is exported height,
Low level state is controlled；The MCU of tested object is connected through SPI communication line with the FLASH of test object；
The SPI communication interface of main control module is connected with the input terminal of communication control circuit, the output of communication control circuit
End forms the SPI communication line interface being connected with the SPI communication line between MCU and FLASH；The output end of main control module and communication
The control terminal of control circuit is connected, and is controlled with the on off operating mode to its input terminal and output end；Energy acquisition circuit
Input terminal forms the energy mark acquisition interface being connected with the power end of the MCU of tested object, energy acquisition circuit acquisition
Signal is input to oscillograph after the processing of filtering and amplifying circuit.
The side channel signal automated collection systems towards IOT terminal of the utility model, main control module are resetted by control
The output of control circuit makes MCU be in the low level reset signal of reset state always, so that MCU is lost the control to FLASH, together
When main control module output connect communication control circuit input and the low level signal of output end so that main control module is by firmware upgrade
Data are downloaded in FLASH；Firmware upgrade data download after, main control module output disconnect communication control circuit input with it is defeated
The high level signal of outlet connection, to restore control of the MCU to FLASH, while main control module control reset control circuit output
High level signal, to trigger the energy mark signal that oscillograph receives energy acquisition circuit acquisition.
The side channel signal automated collection systems towards IOT terminal of the utility model, the main control module use model
Different pins for the chip of STM32F405R, STM32F405R export reseting controling signal C_RST, communications control signal E_
STM and SPI communication signal MOSI, MISO, SCK and NSS；Reset control circuit is opened by the simulation of model TS5A3167DBV
U18 composition is closed, the control terminal IN of analog switch U18 is connected with reseting controling signal C_RST, the outlet side of analog switch U18
Public end COM series resistance R26 after form reset signal, the normal-closed end NC ground connection of analog switch U18；Communication control
Circuit is made of analog switch U8, U9, U10, U11 that 4 models are TS5A3167DBV, 4 analog switch U8, U9, U10,
The control terminal IN of U11 is connected with communications control signal E_STM；SPI communication signal MOSI, MISO, SCK and NSS are concatenated
C_MOSI, C_MISO, C_SCK and C_CS are respectively formed after resistance, the SPI communication line being tested between the MCU and FLASH of object
Respectively F_MOSI, F_MISO, F_SCK and F_CS；The public end COM of 4 analog switches U8, U9, U10, U11 respectively with C_
CS, C_SCK, C_MISO, C_MOSI are connected, and normal-closed end NC is connected with F_CS, F_SCK, F_MISO, F_MOSI respectively.
The side channel signal automated collection systems towards IOT terminal of the utility model, the energy acquisition circuit is by electricity
R5, R6, R10 and capacitor C15, C16, C17 composition are hindered, one end after resistance R5 connects with resistance R6 is grounded, and the other end forms energy
Mark acquisition interface is measured, the both ends after capacitor C15, C16 and C17 are in parallel are connected to power ground and one end of R10 respectively, and R10's is another
It is terminated in energy mark acquisition interface；Filtering and amplifying circuit by amplifier AD8000, resistance R15, R22, R21 and capacitor C29,
Both ends after C30, C31 and C32 composition, resistance R22, resistance R15 and resistance R21 are sequentially connected in series are connected to power ground and power supply respectively
On just, the both ends after capacitor C29, C30, C31 are in parallel are connected to the junction of R5 and R6 and the junction of R22 and R15 respectively；Electricity
The junction of resistance R15 and R21 is grounded through capacitor C32, and the input terminal IN+ of amplifier AD8000 is connected to the junction of R22 and R15,
The output end OUT of amplifier AD8000 forms the signaling interface for being input to oscillograph after capacitor and resistance.
The side channel signal automated collection systems towards IOT terminal of the utility model, the main control module turn through USB
TTL module and PC machine communicate to connect, and USB turns TTL module and is made of the chip of model FT232RL, and the RS232 of main control module is logical
Letter interface is connected with the end TXD, RXD of FT232RL, what the port USBDM, USBDP formation of FT232RL was connected with PC machine
USB interface.
The beneficial effects of the utility model are: the side channel signal automatic collection system towards IOT terminal of the utility model
System, is made of PC machine, oscillograph and side channel information analog input card, and side channel information analog input card is controlled by main control module, reset
Circuit processed, communication control circuit, energy acquisition circuit composition.The output end of reset control circuit is formed and tested object
The reset line interface that MCU reset terminal is connected, SPI communication line interface on communication control circuit can in the control line of main control module
The open or closed SPI communication connection between MCU and FLASH, the acquisition interface of energy mark Acquisition Circuit and the power end of MCU
It is connected, to realize the acquisition to energy mark signal (faint voltage change signal) in MCU firmware upgrade process.Use process
In, it is connect by SPI communication line between the MCU reset terminal, MCU and FLASH by tested object, MCU power end with corresponding
Mouth is connected, and the automatic collection to the energy mark signal in tested object firmware upgrade process can be realized, to IOT terminal
It whether there is side-channel attack loophole during device firmware upgrade to be analyzed, provide the side channel information acquisition of automation
System is conducive to the safety to IOT terminal device preventing side-channel attack and carries out convenient, analysis and assessment fast and accurately.
Detailed description of the invention
Fig. 1 is the schematic diagram of the side channel signal automated collection systems towards IOT terminal of the utility model；
Fig. 2 is the circuit diagram of the main control module in the utility model；
Fig. 3 is the circuit diagram of the reset control circuit in the utility model；
Fig. 4 is the circuit diagram of the trigger circuit in the utility model；
Fig. 5 is the circuit diagram of communication control circuit in the utility model；
Fig. 6 is the circuit diagram of the SPI signal of the main control module output in the utility model；
Fig. 7 is the circuit diagram of energy acquisition circuit and filtering and amplifying circuit in the utility model；
Fig. 8 is the circuit diagram that USB turns TTL module in the utility model；
Fig. 9 is the circuit diagram of the MCU as tested object a kind of；
Figure 10 is the circuit diagram of the FLASH as tested object a kind of.
In figure: 1 side channel information analog input card, 2 oscillographs, 3 PC machine, 4 main control modules, 5 reset control circuits, 6 communications
Control circuit, 7 trigger circuits, 8 filtering and amplifying circuits, 9 energy acquisition circuits, 10 power supply circuits, 11 USB turn TTL module；12
MCU, 13 FLASH, 14 reset line interface, 15 SPI communication line interfaces, 16 energy mark acquisition interfaces.
Specific embodiment
The utility model is described in further detail with embodiment with reference to the accompanying drawing.
As shown in Figure 1, giving the principle of the side channel signal automated collection systems towards IOT terminal of the utility model
Figure, is made of PC machine 3, oscillograph 2 and side channel information analog input card 1, and PC machine is used to run answering for side channel signal analysis
With program, PC machine 3 and side channel information analog input card 1 are communicated to connect, so that firmware upgrade data are sent to side channel by PC machine 3
The data that information collection board 1 and receiving side channel information analog input card 1 are sent.The realization pair of side channel information analog input card 1
The acquisition of the energy mark signal of tested object, and the signal of acquisition is transmitted in oscillograph 2.Oscillograph 2 and PC machine 1 are through logical
Letter line is connected, and the energy mark signal of received analog signal form is converted digital signal by oscillograph 2, and is uploaded to PC machine
In 3, the energy mark acquired so as to 3 Duis of PC machine is analyzed, and ultimately forms the side Multiple Channel Analysis result of IOT terminal device.
Side channel information analog input card 1 shown in FIG. 1 by main control module 4, reset control circuit 5, communication control circuit 6,
Energy mark Acquisition Circuit 9, trigger circuit 7, filtering and amplifying circuit 8, USB turn TLL module and power supply circuit 10 forms, master control mould
Block 4 has the function of data communication, FLASH data manipulation and control output, turns TTL module 11 by USB and communicates with PC machine 3
Letter, voltage needed for power supply circuit 10 provides work for each module.The output end of reset control circuit 5, which is formed, resets line interface
14, it resets line interface 14 and is used to be connected with the reset terminal of tested object MCU, 5 input terminal of reset control circuit and master control mould
The output end of block 4 is connected, so that under the control action of main control module 4, control 5 output phase of reset control circuit is answered high and low
The reset signal of level.The reset signal that reset control circuit 5 exports simultaneously is also used as the output signal of trigger circuit 7, with touching
It sends out oscillograph 2 and receives energy mark signal.
The input terminal of communication control circuit 6 is connected with the SPI communication line that main control module 4 exports, and it is logical that output end forms SPI
Believe that line interface 15, the SPI communication line between the MCU and FLASH of tested object are connected on SPI communication line interface 15；Communication control
The control terminal of circuit 6 processed is connected with the output end of main control module 4, so that main control module 4 exports control communication control circuit 6
The control signal of input and output end on-off.The input terminal of energy acquisition circuit 9 forms energy mark acquisition interface 16, output end with
Filtering and amplifying circuit 8 is connected, and energy mark acquisition interface 16 is connected with the power end of tested object MCU, is existed with obtaining MCU
The signal intensity of power end in firmware upgrade process, and amplified, be filtered after be input in oscillograph 2.
The effect of main control module 4 is to receive PC machine 3 to send over data, and carry out parsing to data and obtain random firmware number
According to, then by firmware upgrade mark and random firmware data, downloaded to by communication control circuit 6 in the FLASH of IOT terminal,
Make MCU when FLASH downloading data by reset control circuit simultaneously, is in reset state always.The firmware of FLASH
After data are downloaded, communication control circuit disconnects main control module and FLASH communication data line, and reset control circuit output is multiple
Position signal triggering MCU is restarted, and MCU is promoted to enter firmware upgrade process.
The reseting controling signal for making MCU be in reset state always is exported when main control module 4 controls reset control circuit 5
Afterwards, since MCU is in reset state, the control to FLASH is just lost.At this point, main control module 4 controls communication control circuit
6 input and output is connected, and is achieved that main control module 4 is connect with the SPI communication of FLASH, main control module 4 can will receive at this time
PC machine 3 send firmware upgrade data be downloaded in FLASH.After downloading, main control module 4 controls communication control circuit 6
Input and output disconnect, disconnect main control module 4 connect with the SPI communication of FLASH；At this point, changing the defeated of reset control circuit 5
It does well, restarts MCU, so that MCU is upgraded using the firmware data in FLASH.Trigger circuit 7 exports simultaneously
It controls signal triggering oscillograph and carries out signal reception, the energy mark signal that energy acquisition circuit 9 acquires is sent in oscillograph 2.
As shown in Fig. 2, give the circuit diagram of the main control module in the utility model, shown in main control module 4 use type
Number chip for being STM32F405R, the port PB1, PB2 of STM32F405R is controlled respectively as reseting controling signal C_RST, communication
Signal E_STM processed, PA7, PA6, PA5, PA4 respectively as SPI communication MOSI, MISO, SCK and NSS signal, PC10,
PC11 is respectively as RXD, TXD signal for realizing RS232 communication.As shown in fig. 6, giving the main control module in the utility model
The circuit diagram of the SPI signal of output, it is seen that main control module output MOSI, MISO, SCK and NSS signal respectively through resistance R17,
SPI communication signal of the formation marked as C_MOSI, C_MISO, C_SCK and C_NSS after R18, R19, R20, increase resistance R17,
R18, R19, R20 are used for the ease of debugging.
As shown in figure 3, give the circuit diagram of the reset control circuit in the utility model, shown in reset control circuit
5 use the analog switch U18 of model TS5A3167DBV, and the end IN of analog switch U18 is connected with reseting controling signal C_RST
It connects, forms reset signal after the end the COM series resistance R28 of analog switch U18, the end the NC ground connection of analog switch U18.Such as
Shown in Fig. 4, the circuit diagram of the trigger circuit in the utility model, the reset signal that analog switch U18 is generated are givenAlso
It is used as the trigger signal being input in oscillograph 2, the pin 1 in Fig. 4 in CON3 is shorted with pin 2, that is, selected multiple
Position signalIt is exported as trigger signal.Pin 2 and 3 is shorted, that is, has selected I/O mouthfuls of low and high levels defeated as trigger signal
Out.Trigger signal is connected after passing through resistance R61 with SMA interface.SMA turns BNC cable and oscillograph 2 is connected with the port SM2 J11.
TS5A3167DBV in Fig. 3 singly throws analog switch to be single-ended, and the conducting resistance of the analog switch is 0.9 Ω, this is led
Energization resistance value is smaller, and loss of signal degree is small, and precision is higher.The frequency bandwidth of TS5A3167DBV be 200MHZ, dynamic range compared with
Greatly, it can satisfy the demand of SPI communication frequency.The single supply that the operating condition of TS5A3167DBV is+1.65V-+5.5V is powered,
Its voltage is chosen to be+3.3V, identical as the voltage of main control module 4 and FLASH, to simplify the complexity of power supply circuit.It should
Analog switch has 5 pins: 1(NC), 2(COM), 3(GND), 4(IN) and 5(V+).Wherein pin 1(NC) it is analog switch
Normal-closed end, 2(COM) be analog switch public end, 3(GND) logically, 4(IN) logic level input, 5(V+) positive simulation
Power input.Wherein IN(4) it is connected with main control module, the end COM is according to IN(4) height of incoming level, it switches over.The simulation
The function of switch is shown in Table 1.H indicates that high level, L indicate low level in table.
Table 1
Reset control circuit 5 is made of 1 analog switch TS5A3167DBV, resistance, capacitor and reset key.Work as reset
Control signal C_RST be low level when so that IN(4) pin be low level, public end COM(2) be connected with normal-closed end NC(1),
So that the level of the reseting pin of MCU be always it is low, MCU is in reset state at this time.When reseting controling signal C_RST is low electricity
Usually, IN(4) be also high level, public end COM(2) disconnected with normal-closed end NC(1), COM(2) vacantly, the reset of MCU is electric at this time
Road generates reset signal, restarts MCU.
As shown in figure 5, give the circuit diagram of communication control circuit in the utility model, shown in communication control circuit by
4 models are the analog switch composition of TS5A3167DBV, and label is respectively U8, U9, U10, U11,4 analog switches
The communications control signal E_STM that the IN pin of (U8, U9, U10, U11) is exported with main control module 4 is connected, analog switch U8,
The public end COM of U9, U10, U11 are connected with C_CS, C_SCK, C_MISO, C_MOSI respectively, normal-closed end NC respectively with F_CS,
F_SCK, F_MISO, F_MOSI are connected, F_MOSI, F_MISO, F_SCK and F_CS be tested object MCU and FLASH it
Between SPI communication line.In this way, when the communications control signal E_STM that main control module 4 exports is low level, so that C_CS, C_
SCK, C_MISO, C_MOSI are connected with F_CS, F_SCK, F_MISO, F_MOSI, that is, realize main control module 4 and tested pair
As the communication connection between FLASH, so that main control module 4 downloads firmware upgrade data into FLASH；When main control module 4 exports
E_STM be high level when, then disconnect the communication connection between main control module 4 and FLASH.
Reset control circuit 5 and communication control circuit 6 cooperate under the control of main control module 4, are not needing artificially
In the case where interference, automation realizes the process of simulation firmware upgrade.The level state of C_RST and E_STM is different, control electricity
The function that road is realized is different.The specific status function of C_RST and E_STM is shown in Table 2.H indicates that high level, L indicate low electricity in table
It is flat.
Table 2
The major function that main control module 4 is realized is: receiving the data that PC machine side Multiple Channel Analysis software is transmitted across, and to data
It carries out parsing and obtains random firmware data；Then reset and signal circuit are controlled, by firmware upgrade mark and firmware
Data download to the specified position FLASH；After downloading, starting MCU is resetted, reset signal is shown as trigger signal, triggering
Wave device samples energy mark.
As shown in fig. 7, giving the circuit diagram of energy acquisition circuit and filtering and amplifying circuit in the utility model, energy is adopted
Collector 9 is made of resistance R10 in resistance R5, R6 and Fig. 9 in Fig. 7 and capacitor C15, C16, C17, and resistance R5 and resistance R6 go here and there
One end ground connection after connection, the other end (marked as POWER) forms energy mark acquisition interface 16, after capacitor C15, C16 and C17 are in parallel
Both ends be connected to power ground and one end of R10 respectively, the another of R10 is terminated in energy mark acquisition interface 16, energy mark acquisition
Interface 16 is connected with the power end of tested object, to acquire the letter of MCU power end during running firmware upgrade procedure
Number variation.Filtering and amplifying circuit 8 is by amplifier AD8000, resistance R15, R22, R21 and capacitor C29, C30, C31 and C32 group
At, resistance R22, resistance R15 and resistance R21 be sequentially connected in series after both ends be connected to respectively power ground and power supply just on, capacitor C29,
Both ends after C30, C31 are in parallel are connected to the junction of R5 and R6 and the junction of R22 and R15 respectively；Resistance R15's and R21
Junction is grounded through capacitor C32, and the input terminal IN+ of amplifier AD8000 is connected to the junction of R22 and R15, amplifier AD8000
Output end OUT the signaling interface for being input to oscillograph is formed after capacitor and resistance.
As shown in figure 8, giving the circuit diagram that USB in the utility model turns TTL module, main control module 4 turns TTL through USB
Module 11 and PC machine 3 communicate to connect, and USB turns TTL module and is made of the chip of model FT232RL, and the RS232 of main control module is logical
Letter interface is connected with the end TXD, RXD of FT232RL, what the port USBDM, USBDP formation of FT232RL was connected with PC machine
USB interface.As shown in figure 9, giving the circuit diagram of the MCU as tested object a kind of, the MCU for being tested object uses type
Number be ATMEGA2564RFR2-ZU chip, the port I/O is formed with F_CS, F_SCK, F_ that realization is communicated with FLASH
MISO, F_MOSI signal wire are connected with the reset signal that reset control circuit 5 exportsSignal end, and for carrying out
The POWER signal end of energy mark signal acquisition.As shown in Figure 10, the circuit of the FLASH as tested object a kind of is given
Figure, shown in FLASH memory use model M25P40-VMN6PB chip, be connected with the SPI communication line of MCU, with
Realize the storage and reading of data, shown in switch U5, U6 and socket J4 be to debug and be used.
Claims (5)
1. a kind of side channel signal automated collection systems towards IOT terminal, including side channel information analog input card (1), oscillography
Device (2) and PC machine (3), for PC machine for running side Multiple Channel Analysis application program, side channel information analog input card is tested for acquiring
The energy mark signal in object firmware upgrade process is tried, and is sent in oscillograph；Oscillograph is connected with PC machine through communication line,
Oscillograph converts digital signal for received energy mark signal and is transmitted to PC machine；It is characterized by: the side channel information
Analog input card is filtered by main control module (4), reset control circuit (5), communication control circuit (6), energy mark Acquisition Circuit, amplification
Circuit (8) and power supply circuit (10) composition, main control module turns TTL module (11) by USB and PC machine communicates to connect；Reset control
The output end of circuit forms the reset line interface (14) being connected with the reset signal of the MCU(12 of tested object) all the way, separately
The trigger signal being connected with oscillograph is formed all the way, and the output end of main control module is connected with the control terminal of reset control circuit
It connects, to control the high and low level state that reset control circuit exports；The MCU of tested object is through SPI communication line and surveys
The FLASH of examination object is connected；
The SPI communication interface of main control module is connected with the input terminal of communication control circuit (6), the output end of communication control circuit
Form the SPI communication line interface (15) being connected with the SPI communication line between MCU and FLASH；The output end of main control module and logical
The control terminal of letter control circuit is connected, and is controlled with the on off operating mode to its input terminal and output end；Energy acquisition circuit
(9) input terminal forms the energy mark acquisition interface (16) being connected with the power end of the MCU of tested object, energy acquisition electricity
The signal of road acquisition is input to oscillograph (2) after the processing of filtering and amplifying circuit (8).
2. the side channel signal automated collection systems according to claim 1 towards IOT terminal, it is characterised in that: master control
Module (4) makes MCU(12 by controlling the output of reset control circuit (5)) it is in the low level reset letter of reset state always
Number, lose MCU to FLASH(13) control, while main control module output connect communication control circuit (6) input and output end
Low level signal so that firmware upgrade data are downloaded in FLASH by main control module；After firmware upgrade data are downloaded,
Main control module output disconnects communication control circuit and inputs the high level signal being connected to output end, to restore control of the MCU to FLASH
System, while main control module control reset control circuit exports high level signal, receives energy acquisition circuit to trigger oscillograph (2)
(9) the energy mark signal acquired.
3. the side channel signal automated collection systems according to claim 1 or 2 towards IOT terminal, it is characterised in that: institute
The chip that main control module (4) use model STM32F405R is stated, the different pins of STM32F405R export reseting controling signal
C_RST, communications control signal E_STM and SPI communication signal MOSI, MISO, SCK and NSS；Reset control circuit (5) is by type
It number is formed for the analog switch U18 of TS5A3167DBV, the control terminal IN of analog switch U18 is connected with reseting controling signal C_RST
It connects, forms reset signal after the public end COM series resistance R26 of the outlet side of analog switch U18, analog switch U18's
Normal-closed end NC ground connection；Communication control circuit (6) is analog switch U8, U9, U10, U11 group of TS5A3167DBV by 4 models
At the control terminal IN of 4 analog switches U8, U9, U10, U11 are connected with communications control signal E_STM；SPI communication signal
MOSI, MISO, SCK and NSS are respectively formed C_MOSI, C_MISO, C_SCK and C_CS after being concatenated resistance, are tested object
SPI communication line between MCU and FLASH is respectively F_MOSI, F_MISO, F_SCK and F_CS；4 analog switch U8, U9,
The public end COM of U10, U11 are connected with C_CS, C_SCK, C_MISO, C_MOSI respectively, normal-closed end NC respectively with F_CS, F_
SCK, F_MISO, F_MOSI are connected.
4. the side channel signal automated collection systems according to claim 1 or 2 towards IOT terminal, it is characterised in that: institute
It states energy acquisition circuit (9) to be made of resistance R5, R6, R10 and capacitor C15, C16, C17, after resistance R5 connects with resistance R6
One end ground connection, the other end form energy mark acquisition interface (16), and the both ends after capacitor C15, C16 and C17 are in parallel are connected to electricity respectively
Source and R10 one end, the another of R10 be terminated in energy mark acquisition interface；Filtering and amplifying circuit (8) is by amplifier
AD8000, resistance R15, R22, R21 and capacitor C29, C30, C31 and C32 composition, resistance R22, resistance R15 and resistance R21 according to
Both ends after secondary series connection be connected to respectively power ground and power supply just on, the both ends after capacitor C29, C30, C31 is in parallel are connected to R5 respectively
With the junction of the junction of R6 and R22 and R15；The junction of resistance R15 and R21 are grounded through capacitor C32, amplifier
The input terminal IN+ of AD8000 is connected to the junction of R22 and R15, the output end OUT of amplifier AD8000 shape after capacitor and resistance
At the signaling interface for being input to oscillograph.
5. the side channel signal automated collection systems according to claim 1 or 2 towards IOT terminal, it is characterised in that: institute
It states main control module (4) and turns TTL module (11) and PC machine (3) communication connection through USB, USB turns TTL module by model FT232RL
Chip composition, the RS232 communication interface of main control module is connected with the end TXD, RXD of FT232RL, the USBDM of FT232RL,
The port USBDP forms the USB interface being connected with PC machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821811952.1U CN208862872U (en) | 2018-11-05 | 2018-11-05 | A kind of side channel signal automated collection systems towards IOT terminal |
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| CN201821811952.1U CN208862872U (en) | 2018-11-05 | 2018-11-05 | A kind of side channel signal automated collection systems towards IOT terminal |
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Granted publication date: 20190514 Termination date: 20191105 |