CN106330335A - Method for sharing a group of infrared transceiver circuits in 38K carrier modulation communication and SIR communication - Google Patents
Method for sharing a group of infrared transceiver circuits in 38K carrier modulation communication and SIR communication Download PDFInfo
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- CN106330335A CN106330335A CN201610665599.XA CN201610665599A CN106330335A CN 106330335 A CN106330335 A CN 106330335A CN 201610665599 A CN201610665599 A CN 201610665599A CN 106330335 A CN106330335 A CN 106330335A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/04—Non-electrical signal transmission systems, e.g. optical systems using light waves, e.g. infrared
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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Abstract
The invention discloses a method for sharing a group of infrared transceiver circuits in 38K carrier modulation communication and SIR communication. The infrared transceiver circuit comprises an MCU, a transmitting circuit and a receiving circuit. The transmitting circuit is as follows: an SIR transmitting pin and a 38K carrier output pin of the MCU are respectively connected with two input pins of two input NAND gates, the output pins of the two input NAND gates are serially connected with an infrared transmitting tube and a first current limiting resistor, and the other end of the first current limiting resistor is connected with a 38K signal output pin of the MCU; and the receiving circuit is as follows: an SIR receiving pin and a 38K software demodulation input pin of the MCU are connected with a filter circuit, the filter circuit is connected with an infrared receiving tube and a second current limiting resistor, and a 38K software demodulation output pin of the MCU is connected with a 38K carrier modulation communication receiving pin. According to the method disclosed by the invention, the pins of the infrared transceiver circuits are controlled, so that serial data can not only be received and transmitted according to the requirements of infrared communication in the CJ / T188-2004 ''user meter data transmission technology condition'', but can also be received and transmitted by adopting the SIR communication.
Description
Technical field
The present invention relates to infrared communication field, particularly relate to a kind of 38K Carrier Modulation communication communicate with SIR shared one group red
The method of outer transmission circuit.
Background technology
At present in intellectual water meter industry, CJ/T188-2004 " user's measuring instrument data transmission technology condition " is that industry is led to
Letter standard agreement, protocol requirement photoelectric communication uses infrared 38K Carrier Modulation communication, but 38K Carrier Modulation communication is used
When data are transmitted, maximum baud rate is 9600, and the transmission time is long, is easy to communication failure when transmitting mass data.SIR is
A kind of serial infrared communication mode, baud rate scope is 9600～115200, and transmission speed is fast, and low cost, a lot of MCU carry
SIR function, easily realizes, but incompatible CJ/T188-2004 " user's measuring instrument data transmission technology condition " protocol requirement
Photoelectric communication requirement so that can not communicate with the equipment of compatible protocol communicating requirement.
38K carrier modulation infrared receiving/transmission circuit and SIR infrared receiving/transmission circuit are set the most simultaneously, the most both can make
Communicate with SIR, again can be with the communicating requirement in compatible protocol.But such circuit has two groups of infrared receiving/transmission read heads, operator
The read head that communicates with SIR of 38K carrier communication must be distinguished and operate when member uses, though two groups of read heads from close, also can
The success rate of impact communication；And such design cost is higher.
It is incorporated in one group of transmission circuit if 38K Carrier Modulation communication is communicated with SIR, above-mentioned appearance can be solved
Problem.
Summary of the invention
The technical scheme is that and be achieved in that:
38K Carrier Modulation communication communicates with SIR the method sharing one group of infrared receiving/transmission circuit, including one group of infrared receiving/transmission electricity
Road, described infrared receiving/transmission circuit includes MCU, and wherein two groups of serial ports of MCU connect sending and receiving end and the 38K carrier wave of SIR communication respectively
The sending and receiving end of modulation communication, the output pin of described MCU includes that SIR sends pin, 38K signal sends pin, the output of 38K carrier wave
Pin and 38K software demodulation output pin, described SIR sends pin and described 38K carrier wave output pin connects two inputs respectively
Two input pins of NAND gate, this two input nand gates output pin is in series with infrared transmitting tube and the one of the first current-limiting resistance
End, the described first current-limiting resistance other end connects described 38K signal and sends pin；The reception pin of described MCU includes that SIR receives
Pin, 38K carrier signal input pin and 38K signal receive pin, and it is defeated with described 38K carrier signal that described SIR receives pin
Entering pin and connect the input of filter circuit, the outfan of filter circuit connects infrared receiving tube and the second current-limiting resistance, institute
State 38K signal and receive the pin described 38K carrier wave software demodulation output pin of connection；
The relevant pins of MCU is pressed respectively 38K Carrier Modulation communication pattern and the configuration of SIR communication pattern, described infrared receipts
Power Generation Road carries out 38K Carrier Modulation communication or SIR communication.
Further, described 38K Carrier Modulation communication mode configuration method is specially following steps:
Described SIR sends pin output high level, and described 38K carrier wave output pin output frequency is the square wave of 38KHz；
The serial ports that 38K Carrier Modulation communication is corresponding is configured by requirement in standard, and it is that floating is defeated that described sir signal receives pin configuration
Entering, described MCU detects the signal of described filter circuit outfan in real time, carries out software demodulation, and defeated by described 38K software demodulation
Go out pin and export described 38K signal reception pin.
Further, described SIR communication pattern collocation method is specially following steps:
Described 38K signal sends pin output low level, and described 38K carrier wave output pin output high level, SIR communication is right
The serial ports answered is configured by SIR communication mode, and described 38K carrier signal input pin is set to floating input.
Further, the signal of 38K Carrier Modulation communication is launched and is specifically included following steps:
Configuring by 38K Carrier Modulation communication pattern, described 38K carrier wave output pin is controlled output frequency by described MCU
Rate is 38KHz square-wave signal, is transferred to described two input nand gate inputs；It is to be modulated that described 38K signal sends pin output
Signal, with 38K square-wave signal after two input nand gates, produces 38K carrier (boc) modulated signals, described 38K carrier (boc) modulated signals warp
It is converted into infrared signal by infrared transmitting tube after described first current-limiting resistance to send.
Further, the signal of 38K Carrier Modulation communication receives and specifically includes following steps:
Configuring by 38K Carrier Modulation communication pattern, infrared signal is converted into the signal of telecommunication by described infrared receiving tube,
Transmission is to described 38K carrier signal input pin after described filter circuit filters for the signal of telecommunication after conversion, and described MCU is to filtering
After signal be demodulated, by the signal output after demodulation to described 38K software demodulation output pin, described 38K signal connect
Spasm foot carries out data parsing to the signal after demodulation, completes communication.
Further, the signal of SIR communication is launched and is specifically included following steps:
Configuring by SIR communication pattern, described SIR sends pin and exports signal to be modulated, described signal warp to be modulated
Described two input nand gates amplify transmission extremely described infrared transmitting tube, and described infrared transmitting tube converts electrical signals to optical signal and sends out
Send.
Further, the signal of SIR communication receives and specifically includes following steps:
Configuring by SIR communication pattern, infrared signal is converted into the signal of telecommunication by described infrared receiving tube, after conversion
After the filtered circuit filtering of the signal of telecommunication, transmission receives pin to described SIR, and described MCU carries out data solution to filtered signal
Analysis, completes communication.
Further, the baud rate of described 38K Carrier Modulation communication correspondence serial ports is less than 9600.
Further, the baud rate scope of the corresponding serial ports of described SIR communication is 19200-115200, and described sir signal is
Dutycycle is the square wave of 3/16.
The beneficial effects of the present invention is: by the pin level of infrared receiving/transmission circuit is controlled, make infrared receiving/transmission circuit
Serial data can be allowed can be transmitted according to the requirement of agreement mid-infrared communications portion after 38K carrier signal modulation and
Receive, SIR communication can be used again serial data to be transmitted and receives.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used
To obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is that the present invention a kind of 38K Carrier Modulation communication communicates with SIR and shares the electricity of method of one group of infrared receiving/transmission circuit
Road schematic diagram；
Fig. 2 is that the signal of 38K Carrier Modulation communication launches flow chart；
Fig. 3 is the signal software demodulation flow chart of 38K Carrier Modulation communication；
Fig. 4 is that the signal of 38K Carrier Modulation communication receives flow chart；
Fig. 5 is that the signal of SIR communication launches flow chart；
Fig. 6 is that the signal of SIR communication receives flow chart；
Fig. 7 is the sequential chart of SIR communication；
Fig. 8 is the sequential chart of 38K carrier communication.
In Fig. 1,1-bis-input nand gate；2-infrared transmitting tube；3-infrared receiving tube；4-the first current-limiting resistance；5-second
Current-limiting resistance.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
As it is shown in figure 1, the present invention to propose a kind of 38K Carrier Modulation communication shared one group of infrared receiving/transmission that communicate with SIR electric
The method on road, infrared receiving/transmission circuit includes MCU, and wherein two groups of serial ports of MCU connect sending and receiving end and the 38K load of SIR communication respectively
The sending and receiving end of ripple modulation communication, MCU and transtation mission circuit relevant pins include that SIR sends pin (TX2), 38K signal sends pin
(TX1), 38K carrier wave output pin (TIM1) and 38K software demodulation output pin (IO1), SIR send pin and 38K carrier wave is defeated
Going out pin and connect two input pins of two input nand gates 1 respectively, this two input nand gate 1 output pin is in series with infrared
Penetrating pipe and the first current-limiting resistance, another termination 38K signal of the first current-limiting resistance sends pin TX1；MCU to receive that circuit is relevant draws
Foot includes that SIR receives pin (RX2), 38K carrier signal input pin (TIM2), and 38K signal receives pin (RX1), and SIR receives
Pin (RX2) is connected the input of a filter circuit with 38K carrier signal input pin (TIM2), the outfan of filter circuit with
Infrared receiving tube and the second current-limiting resistance connect, and infrared receiving tube negative pole connects power supply, the second current-limiting resistance other end ground connection, 38K
Signal receives pin (RX1) and connects 38K software demodulation output pin (IO1), and the serial ports that 38K Carrier Modulation communication is corresponding is referred to as
The serial ports of UART1, SIR communication correspondence is referred to as UART2.The two of MCU groups of serial ports are respectively configured as 38K Carrier Modulation communication pattern
With SIR communication pattern, the output level of the output pin of configuration MCU, described infrared receiving/transmission circuit carries out 38K Carrier Modulation communication
Or SIR communication.
The I/O port of MCU there are certain requirements, and specific requirement is as follows:
1.TX1 Yu RX1 is transmission and the reception foot of UART1, TX2 Yu RX2 is transmission and the reception foot of UART2 serial ports, and
UART2 serial ports supports SIR communication function, TX1 with TX2 all can use as common I/O port.
2.TIM1 needs export the square wave of 38K frequency and can export low and high level as common IO.
3.TIM2 need to support trailing edge capture and can be set to floating input.
4.IO1 is common IO, exportable low and high level.
SIR sends pin output high level, and 38K carrier wave output pin output frequency is the square wave of 38KHz；38K carrier wave is adjusted
The serial ports of system communication correspondence is configured by requirement in standard, and it is floating input that sir signal receives pin configuration, and MCU examines in real time
Survey the signal of filter circuit, carry out software demodulation, and exported 38K signal reception pin by 38K software demodulation output pin, red
Outer transmission circuit carries out 38K Carrier Modulation communication, and this is 38K Carrier Modulation communication mode configuration method；
38K signal sends pin output low level, 38K carrier wave output pin output high level, the serial ports that SIR communication is corresponding
Configuring by SIR communication mode, 38K carrier signal input pin is set to floating input, and infrared receiving/transmission circuit will carry out SIR and lead to
Letter, this is SIR communication pattern collocation method.
The signal of 38K Carrier Modulation communication is launched flow process and is specifically included following steps:
Configuring by 38K Carrier Modulation communication pattern, 38K carrier wave output pin (TIM1) is controlled output 38K side by MCU
Ripple signal, is transferred to two input nand gate inputs.38K signal sends pin (TX1) and exports signal to be modulated, with 38K square wave
Signal after two input nand gates, produce 38K carrier (boc) modulated signals, 38K carrier (boc) modulated signals after the first current-limiting resistance by red
Emission pipe is converted into infrared signal and sends.
In conjunction with Fig. 1, Fig. 2 and Fig. 8, it is as follows that the signal of 38K carrier communication launches idiographic flow: by the UART1 of MCU by standard
Communication protocol arranges serial ports parameter, SIR sends pin (TX2) and is set to high level, and waveform is shown in the TX_SIR in Fig. 8, it is judged that be
No needs sends data, if it is not, then repeat to judge, is the most then produced 38K square wave by the intervalometer within MCU, is carried by 38K
Ripple output pin (TIM1) exports, and waveform is shown in the 38KOUT in Fig. 8, and the data that will send put into UART1 transmitter register, beat
Opening 38K signal and send pin (TX1), i.e. send the upper waveform producing data to be sent of pin (TX1) at 38K signal, waveform is shown in
TX_38K in Fig. 8.After data to be sent are sent, close 38K carrier wave output pin (TIM1) output, 38K is carried
Ripple output pin (TIM1) is set to high level, and waveform is shown in TX_38K and 38KOUT in Fig. 8.While data send, 38K side
Ripple is modulated through two input nand gates with data signal, and infrared transmitting tube launches the 38K signal after modulation, and waveform is shown in Fig. 8
IrDA_OUT.
In conjunction with Fig. 1, Fig. 4 and Fig. 8, the signal of 38K Carrier Modulation communication receives flow process and specifically includes following steps:
Configuring by 38K Carrier Modulation communication pattern, infrared signal is converted into the signal of telecommunication, waveform by infrared receiving tube
See the IrDA_RX in Fig. 8, after the filtered circuit filtering of the signal of telecommunication after conversion, transmit the 38K carrier signal input pin to MCU
(TIM2), waveform is shown in the 38K carrier wave demodulation input in Fig. 8, and filtered signal is demodulated by MCU, by the signal after demodulation
Output is to 38K software demodulation output pin (IO1), and waveform is shown in that the RX_38K in Fig. 8, MCU receive pin by 38K signal
(RX1) receive the data after demodulation, UART1 these data are carried out data parsing.
In conjunction with Fig. 1, Fig. 3, Fig. 8, the flow process of demodulation specifically includes following steps, SIR receives pin (RX2) and is set to float
Empty input, 38K software demodulation output pin (IO1) is set to high level, and MCU judges that 38K carrier signal input pin (TIM2) is
No have trailing edge, the most then start intervalometer, and countdown 1/38000s (cycle of 38K carrier wave), timing terminates front appearance
Trailing edge, then be set to low level by 38K software demodulation output pin (IO1), composes initial value, countdown 1/ to intervalometer
38000s, it is judged that countdown terminates whether front 38K software demodulation output pin (IO1) trailing edge occurs, the most then repeat to give
Time device compose initial value, if it is not, then 38K software demodulation output pin (IO1) is set to high level, repeat to judge RX_SIR pin
Whether there is trailing edge.DEM_IN and RX_38K in waveform before demodulation and after demodulation corresponding diagram 8 respectively.
In conjunction with Fig. 1, Fig. 5, Fig. 7, the signal of SIR communication process is launched flow process and is specifically included following steps:
Configuring by SIR communication pattern, the SIR of MCU sends pin (TX2) output sir signal, the TX_ of waveform such as Fig. 7
SIR, sir signal transmits to infrared transmitting tube through two input nand gates amplifications, the IrDA_OUT of waveform such as Fig. 7, infrared transmitting tube
Convert electrical signals to infrared signal send.
In conjunction with Fig. 1, Fig. 6, Fig. 7, the signal of SIR communication process receives flow process and specifically includes following steps:
Configuring by SIR communication pattern, infrared signal is converted into the signal of telecommunication, waveform such as Fig. 7 by infrared receiving tube
IrDA_RX, transmits SIR reception pin (RX2) to MCU, waveform such as Fig. 7 after the filtered circuit filtering of the signal of telecommunication after conversion
RX_SIR, UART2 carry out data parsing to filtered signal DEM_OUT, complete communication.
38K serial port baud rate is less than 9600.
SIR serial port baud rate scope is 19200-115200, sir signal be dutycycle be the square wave of 3/16.
There are two intervalometers, two UART in MCU, and have one to support SIR communication, photoemission cell and photoelectric receiving tube
Support SIR communication.SIR output pin is set to IrDA pattern, and time idle, it is low level that SIR sends pin, and 38K signal sends
Pin is high level.
The invention provides a kind of infrared 38K Carrier Modulation communication and use same group of infrared receiving/transmission electricity with serial infrared SIR
The design on road, is controlled the sequential of circuit by software and hardware mode, makes circuit that serial data can be allowed through 38K carrier wave
Can be according to CJ/T188-2004 " family metering instrumented data transmission technology condition " mid-infrared communications portion after signal modulation
Requirement be transmitted and receive, serial infrared SIR can be allowed again to carry out transmission and the reception of data.
Design specifically includes: infrared transtation mission circuit and transtation mission circuit software arrangements, be used for realizing serial infrared SIR with
Serial data is through 38K carrier modulation the work that carries out infrared transmission.MCU demodulation process coordinates with infrared receiver filter circuit,
Data after realizing serial infrared SIR and 38K carrier modulation are filtered demodulation, and being output as MCU serial ports can Direct Recognition
Digital signal.
When carrying out the switching of two kinds of communication modes, the change that corresponding pin carries out corresponding output level is the most changeable
Communication mode.In infrared transtation mission circuit, SIR Yu 38K Carrier Modulation communication respectively uses one group of serial ports, by 38K Carrier Modulation communication
After pattern or SIR communication pattern configure, with the string corresponding to the serial ports corresponding to 38K Carrier Modulation communication or SIR communication
Mouth is write data and is i.e. used 38K Carrier Modulation communication or SIR communication mode to be transmitted.In infrared receiving circuit, sir signal is by firmly
Part is converted directly into the sir signal that can directly read, and 38K Carrier Modulation communication then needs to carry out the software demodulation of MCU, after demodulation
Signal can be directly read data by the serial ports that 38K Carrier Modulation communication is corresponding.
The device that two have infrared receiving/transmission circuit is configured to same over the horizon communication system, in limited distance,
Two equipment transmitting-receiving head alignments.Wherein an equipment sends as main frame, and another equipment receives as from machine.Main frame is by right
Answering serial ports to write data, data are sent by infrared emission head through main frame transtation mission circuit.Collect infrared from machine infrared receiving circuit
Signal, is passed to MCU's by (needing MCU to demodulate during 38K Carrier Modulation communication) after being filtered shaping from machine infrared receiving circuit
Serial ports, is received data by serial ports.When machine sends data, main frame uses same method to be received.
These are only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (9)
1.38K Carrier Modulation communication communicates with SIR the method sharing one group of infrared receiving/transmission circuit, including one group of infrared receiving/transmission electricity
Road, it is characterised in that: described infrared receiving/transmission circuit includes MCU, and wherein two groups of serial ports of MCU connect the transmitting-receiving of SIR communication respectively
End and the sending and receiving end of 38K Carrier Modulation communication, the output pin of described MCU includes that SIR sends pin, 38K signal sends pin,
38K carrier wave output pin and 38K software demodulation output pin, described SIR sends pin and described 38K carrier wave output pin difference
Connecting two input pins of two input nand gates, this two input nand gates output pin is in series with infrared transmitting tube and the first limit
One end of leakage resistance, the described first current-limiting resistance other end connects described 38K signal and sends pin；The reception pin of described MCU
Receiving pin, 38K carrier signal input pin and 38K signal including SIR and receive pin, described SIR receives pin and described 38K
Carrier signal input pin connects the input of filter circuit, and the outfan of filter circuit connects infrared receiver tube anode and the
Two current-limiting resistances, another termination power cathode of the second current-limiting resistance, infrared receiver tube cathode connects positive source, described 38K signal
Receive pin and connect described 38K carrier wave software demodulation output pin；
MCU is configured to 38k carrier communication pattern and SIR communication pattern, and described infrared receiving/transmission circuit carries out 38K Carrier Modulation communication
Or SIR communication.
38K Carrier Modulation communication the most according to claim 1 communicate with SIR share one group of infrared receiving/transmission circuit method,
It is characterized in that: 38K Carrier Modulation communication mode configuration method is for specifically including following steps:
Described SIR sends pin output high level, and described 38K carrier wave output pin output frequency is the square wave of 38KHz；38K carries
The serial ports that ripple modulation communication is corresponding is configured by requirement in standard, and it is floating input that described sir signal receives pin configuration, institute
State MCU and detect the signal of described filter circuit in real time, carry out software demodulation, and exported by described 38K software demodulation output pin
Pin is received to described 38K signal.
38K Carrier Modulation communication the most according to claim 1 communicate with SIR share one group of infrared receiving/transmission circuit method,
It is characterized in that, SIR communication pattern collocation method specifically includes following steps:
Described 38K signal sends pin output low level, and described 38K carrier wave output pin output high level, SIR communicates corresponding
Serial ports is configured by SIR communication mode, and described 38K carrier signal input pin is set to floating input.
38K Carrier Modulation communication the most according to claim 1 communicate with SIR share one group of infrared receiving/transmission circuit method,
It is characterized in that: the signal of 38K Carrier Modulation communication is launched and specifically included following steps:
Configuring by 38K Carrier Modulation communication pattern, described 38K carrier wave output pin is controlled output frequency by described MCU and is
38KHz square-wave signal, is transferred to described two input nand gate inputs；Described 38K signal sends pin and exports signal to be modulated,
Described signal to be modulated and 38KHz square-wave signal, after two input nand gates, produce 38K carrier (boc) modulated signals, described 38K carrier wave
Modulated signal is converted into infrared signal by infrared transmitting tube after described first current-limiting resistance and sends.
38K Carrier Modulation communication the most according to claim 1 communicate with SIR share one group of infrared receiving/transmission circuit method,
It is characterized in that: the signal of 38K Carrier Modulation communication receives and specifically includes following steps:
Configuring by 38K Carrier Modulation communication pattern, infrared signal is converted into the signal of telecommunication by described infrared receiving tube, conversion
After the signal of telecommunication after described filter circuit filters, transmission is to described 38K carrier signal input pin, described MCU is to filtered
Signal is demodulated, and by the signal output after demodulation to described 38K software demodulation output pin, described 38K signal receives and draws
Foot carries out data parsing to the signal after demodulation, completes communication.
38K Carrier Modulation communication the most according to claim 1 communicate with SIR share one group of infrared receiving/transmission circuit method,
It is characterized in that: the signal of SIR communication is launched and specifically included following steps:
Configuring by SIR communication pattern, described SIR sends pin output sir signal, and described sir signal inputs through described two
NAND gate transmission is to described infrared transmitting tube, and described infrared transmitting tube converts electrical signals to infrared signal and sends.
38K Carrier Modulation communication the most according to claim 1 communicate with SIR share one group of infrared receiving/transmission circuit method,
It is characterized in that: the signal of SIR communication receives and specifically includes following steps:
Configuring by SIR communication pattern, infrared signal is converted into the signal of telecommunication, the telecommunications after conversion by described infrared receiving tube
After number filtered circuit filtering, transmission receives pin to described SIR, and described MCU carries out data parsing to filtered signal, complete
Become communication.
38K Carrier Modulation communication the most according to claim 1 communicate with SIR share one group of infrared receiving/transmission circuit method,
It is characterized in that: the baud rate of described 38K Carrier Modulation communication correspondence serial ports is less than 9600.
38K Carrier Modulation communication the most according to claim 1 communicate with SIR share one group of infrared receiving/transmission circuit method,
It is characterized in that: the baud rate scope of the corresponding serial ports of described SIR communication is 19200-115200, and it is the side of 3/16 for dutycycle
Ripple.
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|---|---|---|---|---|
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| CN106330335B (en) | 2018-08-28 |
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