Automatic receiving, transmitting and decoding circuit for wireless telegraph signals

Abstract

The utility model discloses an automatic transceiving and decoding circuit for wireless telegraph signals, which comprises an ARM (advanced RISC machines) processor, a DSP (digital signal processor), an interface circuit and an audio output module. The DSP, the interface circuit and the audio output module are electrically connected with the ARM processor. The ARM processor is used for transmitting, receiving and decoding a hand key report signal and transmitting and receiving a datagram and an electronic key signal; the DSP processor is used for decoding the datagram and the electronic key signal; the interface circuit is used for inputting and outputting hand key, electronic key and datagram signals, and the audio output module outputs audio signals of the hand key or the electronic key. According to the utility model, the circuit simultaneously has the functions of automatically receiving and transmitting the hand key, the electronic key and the datagram, the DSP and the ARM processor are used, the integration level of circuit hardware is high, the whole circuit is small in size, low in cost and wide in application scene, and the circuit can replace a single hand key and a single electronic key and is applied to various radio communication scenes.

Description

Technical Field

[0001] The utility model relates to an automatic transceiver and decoding circuit for wireless service signals. Background Technique

[0002] In the early days of radio communication, it mainly relied on manual operation, using a hand key to control the generation and transmission of radiotelegraphs. The hand key usually consists of components such as a button and a spring. By pressing and releasing the button, the on-off of the current can be controlled, thereby generating dots and dashes in Morse code. These dots and dashes can be combined to form letters, numbers, and punctuation marks, and then constitute a complete telegraph message. Currently, the hand key is still a widely used traditional way of sending telegraphs.

[0003] With the continuous development and application of computer technology, people have combined computer technology with communication technology to achieve more efficient and accurate information transmission, which has led to the emergence and continuous development of electronic key technology and datagram technology.

[0004] The electronic key can be regarded as a special keyboard for radiotelegraphs, capable of using buttons representing special dots, dashes, and their combinations to output encoded information including letters, numbers, and punctuation marks. Compared with the hand key, the electronic key has the advantages of being more convenient, efficient, and accurate.

[0005] Radiotelegraphs have gradually evolved from simple text transmission in the early days to more complex data transmission, including not only text but also images and sounds. In this case, the derived datagram technology is a flexible data transmission technology that can adjust the size and format of data according to needs to meet the data communication requirements in different application scenarios. In addition, the datagram can be used as a general data transmission method to achieve seamless connection-like transmission between different communication networks.

[0006] In current radio communication, the way of information input is still relatively single. Traditional hand keys are still widely used and are an essential subject and important means for training telegraph operators. Digital telegraph communication equipment with electronic key and datagram functions still needs to be developed due to its complex technology and high manufacturing cost. Content of the Utility Model

[0007] The purpose of the utility model is to provide an automatic transceiver and decoding circuit for wireless service signals to solve the technical problems mentioned in the above background technique.

[0008] The technical solution for achieving the purpose of the present utility model is: a wireless service signal automatic transceiver and decoding circuit, including an ARM processor, a DSP processor, an interface circuit, and an audio output module that are electrically connected to the ARM processor; the ARM processor is used for the transceiver and decoding of hand key signals, and the transceiver of data packets and electronic key signals, and the DSP processor is used for the decoding of data packets and electronic key signals; the interface circuit is used for inputting and outputting hand key, electronic key, and data packet signals, and the audio output module outputs the audio signals of the hand key or the electronic key.

[0009] Further, it also includes an ADC, which converts analog audio signals into digital audio signals, and the ADC is electrically connected to both the ARM processor and the DSP processor at the same time; the model of the ADC is TLV320AIC23.

[0010] Further, the interface circuit includes a USB interface, a channel interface, a hand key input interface, and a hand key output interface. The USB interface, the channel interface, the hand key input interface, and the hand key output interface are all electrically connected to the ARM processor, and the channel interface is electrically connected to the ADC.

[0011] Further, it also includes a power conversion circuit, which is electrically connected to the USB interface. The DC voltage input by the USB interface is converted by the power conversion circuit and then supplies power to the entire circuit.

[0012] Further, the USB interface is electrically connected to the ARM processor through a USB-UART conversion circuit.

[0013] Further, it also includes a first operational amplifier circuit, and the ARM processor, the interface circuit, and the audio output module are all electrically connected to the first operational amplifier circuit.

[0014] Further, the channel interface is connected to a channel receive operational amplifier circuit and a channel transmit circuit. The channel interface is electrically connected to the ADC through the channel receive operational amplifier circuit, and the channel interface is connected to the ARM processor and the first operational amplifier circuit through the channel transmit circuit.

[0015] Further, UART serial communication is adopted between the DSP and the ARM.

[0016] Further, the model of the ARM processor is STM32F105, and the model of the DSP processor is TMS320C6748.

[0017] Further, the audio output module includes a speaker and an earphone. A power amplifier circuit is arranged at the front end of the speaker, and a second operational amplifier circuit is arranged at the front end of the earphone.

[0018] Adopting the above technical solution, the utility model has the following beneficial effects:

[0019] (1) The circuit of the utility model simultaneously has the functions of automatic transceiver of hand keys, electronic keys and data packets. Using DSP and ARM processors, the integration degree of the circuit hardware is high, the whole circuit is small in size and low in cost, and has a wide range of application scenarios. It can replace single hand keys and electronic keys and be applied to various radio communication scenarios.

[0020] (2) The hand key input interface of the utility model is used to externally connect a hand key and receive hand key signals. The hand key output interface is used for testing and can synchronously output the signals input through the hand key. It has both the function of a telegrapher training and the actual communication function. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the utility model easier to be clearly understood, the following further details the utility model according to specific embodiments in conjunction with the drawings, where

[0022] Figure 1 is the circuit block diagram of the utility model.

[0023] Figure 2 is the circuit diagram of the interface circuit of the utility model.

[0024] Figure 3 is the ADC conversion circuit of the utility model.

[0025] Figure 4 is the circuit diagram of the USB-UART conversion circuit of the utility model.

[0026] Figure 5 is the circuit diagram of the audio operational amplification at the front end of the audio output module of the utility model.

[0027] Figure 6 is the circuit diagram of the power supply circuit of the utility model.

[0028] The reference numerals in the drawings are: ARM processor 1, DSP processor 2, ADC 3, USB interface 4, channel interface 5, hand key input interface 6, hand key output interface 7. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to better understand the above technical solution, the following will detail the above technical solution in conjunction with the drawings of the specification and specific embodiments.

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0032] It should be noted that: like reference numerals and letters denote like items in the following accompanying drawings. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings.

[0033] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of the present utility model is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0034] In the description of the embodiments of the present utility model, it should also be noted that, unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. The present utility model will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0035] (Embodiment 1)

[0036] See Figure 1-6, the automatic transceiver and decoding circuit for wireless service signals of the present utility model includes an ARM processor 1, a DSP processor 2, an interface circuit, and an audio output module that are electrically connected to the ARM processor 1. The ARM processor 1 is used for transceiver and decoding of handkey signals, and transceiver of data packets and electronic key signals. The DSP processor 2 is used for decoding of data packets and electronic key signals. UART serial communication is adopted between the DSP processor 2 and the ARM processor 1. The interface circuit is used for input and output of handkeys, electronic keys, and data packet signals. The audio output module outputs audio signals of handkeys or electronic keys. In this embodiment, the model of the ARM processor 1 is STM32F105, and the model of the DSP processor 2 is TMS320C6748. An ADC 3 is further included. The ADC 3 converts analog audio signals into digital audio signals, and the ADC 3 is electrically connected to both the ARM processor 1 and the DSP processor 2. The model of the ADC 3 is TLV320AIC23. A first operational amplifier circuit is further included. The ARM processor 1, the interface circuit, and the audio output module are all electrically connected to the first operational amplifier circuit.

[0037] Specifically, see Figure 2 , the interface circuit includes a USB interface 4, a channel interface 5, a handkey input interface 6, and a handkey output interface 7. The USB interface 4, the channel interface 5, the handkey input interface 6, and the handkey output interface 7 are all electrically connected to the ARM processor 1. The channel interface 5 is electrically connected to the ADC 3. Among them, the USB interface 4 is connected to a USB-UART conversion circuit and a power supply circuit. The USB interface 4 is connected to the ARM processor 1 through the USB-UART conversion circuit. The USB interface 4 not only has a data communication function but also is an external power supply interface of the circuit. An internal power conversion circuit is electrically connected to the USB interface 4. The DC voltage input by the USB interface 4 is converted by the power conversion circuit and then supplies power to the entire circuit. See Figure 6 , the DC +5V input through the USB interface 4 is converted into DC -5V by the TP7660 chip and into DC +3.3V by the SPX3819M5-3.3 chip. The DC +5V and -5V supply power to the first operational amplifier circuit AD822, and the DC +3.3V supplies power to the remaining chips in the circuit. The handkey input interface 6 is used to externally connect a handkey and receive handkey signals. The handkey output interface 7 is used for testing and can synchronously output the signals input through the handkey. The input and output interfaces of the handkey are respectively connected to different IO pins of the ARM processor 1. The channel interface 5 is connected to a channel receive operational amplifier circuit and a channel transmit circuit. The channel interface 5 is electrically connected to the ADC 3 through the channel receive operational amplifier circuit, and the channel interface 5 is connected to the ARM processor 1 and the first operational amplifier circuit through the channel transmit circuit. Since the signals received by the channel interface 5 are analog audio signals, they need to be sampled by the ADC 3 before reaching the DSP processor 2, and only after being converted into digital audio signals can they be input into the DSP processor 2 for decoding.

[0038] See Figure 5 The audio output module includes a speaker and a headset. A power amplifier circuit is provided at the front end of the speaker, and a second operational amplifier circuit is provided at the front end of the headset. The power amplifier circuit uses a PAM8403 chip, and the second operational amplifier circuit selects an MC34119 chip.

[0039] The circuit of this embodiment has three working modes, namely the hand key reporting mode, the data reporting mode, and the electronic key mode.

[0040] a) When the circuit is in the hand key reporting mode, the Morse code signal input by the hand key is transmitted to the IO pin of the ARM processor 1, decoded by the ARM processor 1 and sent to the USB-UART conversion circuit through the UART1 interface, and then output through the USB interface 4 after signal conversion; the decoded signal can also be output to the hand key output interface 7 through an optocoupler.

[0041] b) When the circuit is in the data reporting mode:

[0042] When receiving a data packet from the USB interface 4, the packet is transmitted to the ARM processor 1 through the USB-UART conversion circuit, and then forwarded by the ARM processor 1 to the DSP processor 2 for decoding. After the DSP processor 2 completes the packet decoding, the output data is converted into an analog data form by the ADC3 and enters the first operational amplifier circuit AD822 for signal amplification and filtering processing, and the processed data is sent out through the channel sending circuit from the channel interface 5;

[0043] When inputting a data packet from the channel interface 5, the packet is amplified and filtered by the channel receiving operational amplifier circuit, then converted by the ADC3, and then sent to the DSP processor 2 for decoding. The decoded data is sent to the ARM processor 1, output by the ARM processor 1 to the USB-UART conversion circuit, and the converted data is output through the USB interface 4, realizing the function of automatic data packet sending and receiving and decoding.

[0044] c) When the circuit is in the electronic key reporting mode:

[0045] When the electronic key packet is input from the USB interface 4 and passes through the USB-UART conversion circuit, the packet is transmitted to the ARM processor 1. After the ARM processor 1 passes the packet to the DSP processor 2 for decoding, the decoded data passes through the ADC3, is converted into an analog data form and enters the first operational amplifier circuit AD822 for signal amplification and filtering, and finally is sent out through the channel sending circuit from the channel interface 5;

[0046] When the electronic key message is input by the channel interface 5, it first passes through the channel receiving operation amplifier circuit to amplify and filter the message. Then, after the message is converted by the ADC3, it is sent to the DSP processor 2 to complete decoding. The decoded data is then sent to the ARM processor 1, forwarded by the ARM processor 1 to the USB-UART conversion circuit, and finally output through the USB interface 4, realizing the automatic sending, receiving, and decoding functions of the electronic key service.

[0047] The manual key or electronic key audio signal output by the ARM processing can also be sent to the speaker and earphone output after the gain is adjusted through the potentiometer and amplifier circuit.

[0048] The circuit of the present utility model simultaneously has the functions of automatic sending and receiving of manual keys, electronic keys, and data messages. Using DSP and ARM processors, the integration degree of the circuit hardware is high, the whole circuit is small in size and low in cost, and has a wide range of application scenarios. It can replace single manual keys and electronic keys and be applied to various radio communication scenarios.

[0049] The specific embodiments described above have further elaborated on the purpose, technical solutions, and beneficial effects of the present utility model. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A wireless telegram signal automatic receiving and decoding circuit, characterized in that: It comprises an ARM processor, a DSP processor electrically connected to the ARM processor, an interface circuit and an audio output module; the ARM processor is used for receiving and sending and decoding hand key signals, datagrams and electronic key signals, and the DSP processor is used for decoding datagrams and electronic key signals; the interface circuit is used for inputting and outputting hand key, electronic key and datagram signals, and the audio output module outputs audio signals of hand keys or electronic keys.

2. The automatic receiving, transmitting and decoding circuit of wireless telegram signals according to claim 1, characterized in that: It also includes an ADC, which converts an analog audio signal into a digital audio signal. The ADC is electrically connected to the ARM processor and the DSP processor at the same time; the model of the ADC is TLV320AIC23.

3. The automatic receiving, transmitting and decoding circuit of wireless telegram signals according to claim 2, characterized in that: The interface circuit includes a USB interface, a channel interface, a hand key input interface and a hand key output interface. The USB interface, the channel interface, the hand key input interface and the hand key output interface are all electrically connected to the ARM, and the channel interface is electrically connected to the ADC.

4. The automatic receiving, transmitting and decoding circuit for wireless telegram signals according to claim 3, characterized in that: It also includes a power conversion circuit, which is electrically connected to the USB interface. The DC voltage input by the USB interface is converted by the power conversion circuit to power the entire circuit.

5. The automatic receiving, transmitting and decoding circuit for wireless telegram signals according to claim 3, characterized in that: The USB interface is electrically connected to the ARM processor signal through a USB-UART conversion circuit.

6. The automatic receiving, transmitting and decoding circuit for wireless telegram signals according to claim 3, characterized in that: It also includes a first operational amplifier circuit, and the ARM processor, the interface circuit and the audio output module are all electrically connected to the first operational amplifier circuit.

7. A wireless telegram signal automatic receiving and decoding circuit according to claim 6, characterized in that: The channel interface is connected to a channel receiving operational amplifier circuit and a channel transmitting circuit. The channel interface is electrically connected to the ADC through the channel receiving operational amplifier circuit. The channel interface is connected to the ARM processor and the first operational amplifier circuit through the channel transmitting circuit.

8. The automatic receiving, transmitting and decoding circuit for wireless telegram signals according to claim 1, characterized in that: The DSP processor and the ARM processor communicate with each other using a UART serial port.

9. The automatic receiving, transmitting and decoding circuit for wireless telegram signals according to claim 1, characterized in that: The model of the ARM processor is STM32F105, and the model of the DSP processor is TMS320C6748.

10. The automatic receiving, transmitting and decoding circuit of wireless telegram signals according to claim 1, characterized in that: The audio output module comprises a speaker and an earphone, a front end of the speaker is provided with a power amplifier circuit, and a front end of the earphone is provided with a second operational amplifier circuit.

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