TWM619031U - Manchester transceiver - Google Patents

Abstract

The utility model provides an apparatus of Manchester transceiver, which includes a receiving unit and a transmitting unit. The receiving unit includes a comparator to receive a Manchester analog signal and convert into an input signal with pulse wave form. A SPI is set to an operation as a slave device. The input signal with pulse wave form is received by a signal input terminal and a timer capture terminal. The rising edge and the falling edge of the input signal is sequentially obtained due to internal operation of the SPI, wherein the SPI obtains a series of data for subsequent use according to the rising edges and the falling edges based on the internal clock. The transmitting unit includes: a processing unit to decode a to-be-transmitted data into digital data with Manchester wave form; a memory unit storing the digital data, triggered by a timing control in satisfying the Manchester wave form to transmitted to a DAC for conversion and transmission.

Description

Manchester Transceiver

The new creation relates to a Manchester encoding and decoding technology, and particularly to a Manchester transceiver device, which uses a serial peripheral interface to perform Manchester decoding and encoding.

As the functions of electronic devices increase, the amount of data communicated between electronic devices at both ends also increases substantially. In response to a large amount of data transmission, it will increase the signal frequency to increase the transmission rate.

The increase in transmission rate requires more encoding and decoding processing. For example, digital data is first encoded in Manchester and then transmitted to the remote electronic device. In operation, the remote electronic device can also be regarded as a slave device. After receiving the transmitted Manchester signal, the remote electronic device needs to decode the Manchester signal to obtain the transmitted digital data string. The value of the data string is a string of data composed of "0" and "1", which respectively correspond to the low level and high level of the signal.

For example, the new generation of 5G uses a wavelength division multiplexing system to superimpose a small amplitude low-frequency sine or cosine modulation on each wavelength at the transmitting end as an identification, and different wavelengths use different frequency identifications. When the low-frequency sine or cosine signal is superimposed on the optical wavelength, there is a modulation amplitude for the top of the optical wavelength, so it can also be called a top-tuned signal. The coding method is the Manchester signal.

According to the encoding method of Manchester signal, its data value is expressed by the width of the pulse, which is conducive to long-distance transmission. In this way, according to a general method, the electronic device at the receiving end, that is, the slave device, needs a processing unit, such as a central processing unit, to analyze the pulse width, and then determine the value of the data. That is to say, the traditional Manchester decoding generally uses software to interrupt and calculate the pulse width to determine the Manchester code, which includes the detection of "0" or "1". For Manchester signals that need to detect higher frequencies, the central processing unit is relatively large.

Regarding the Manchester signal to be transmitted, it also needs to consider reduced coding so that coding and decoding can be integrated.

The central processing unit will also be used for the operation of the overall equipment, so reducing the issue of consuming the work resources of the central processing unit due to the decoding of Manchester signals requires further consideration in design.

This new creation provides a mechanism for decoding and encoding Manchester signals. It uses the function of the peripheral interface of the sequence to decode Manchester signals after appropriate adjustments, without the need to use the central processing unit to analyze the signal pulse width to achieve decoding. The encoding part can parse the digital data into Manchester's waveform using the storage method, and then convert it into an analog output signal according to the control of time.

In one embodiment, the present invention provides a Manchester transceiver device, which includes a receiving unit and a sending unit. The receiving unit includes a comparator to receive the Manchester analog signal and convert it into an input signal in the form of a square wave; and the peripheral interface of the sequence is set to operate as a slave device, through the signal receiving end point and the timing capture end point, to receive the square wave form of the input signal. Input signal, and obtain the rising edge and falling edge of the input signal in sequence through the internal operation of the sequence peripheral interface, wherein the sequence peripheral interface obtains the sequence according to the internal clock according to the rising edge and the falling edge List the data for subsequent use. The sending unit includes: a processing unit that parses the data to be sent into digital data of Manchester waveform; a memory unit that stores the digital data; a peripheral direct memory access unit; and a digital-to-analog conversion unit. The peripheral direct memory access unit is activated according to the time control conforming to the Manchester waveform, and transmits the digital data stored in the memory unit to the digital-to-analog conversion unit for conversion and transmission.

In one embodiment, for the Manchester transceiver device, the serial peripheral interface further includes inverting the serial data to obtain the serial data carried by the input signal.

In one embodiment, for the Manchester transceiver device, the chip select terminal of the serial peripheral interface is grounded, so as to set the serial peripheral interface to be the operation of the slave device.

In one embodiment, for the Manchester transceiver device, the host output slave input pin of the serial peripheral interface is used as the signal receiving end point to receive the input signal.

In one embodiment, for the Manchester transceiver device, the clock input terminal of the serial peripheral interface is connected to an internal clock terminal, and the internal clock of the serial peripheral interface is provided to the clock input terminal.

In one embodiment, for the Manchester transceiver device, the decoding operation of the serial peripheral interface does not involve the operation of the processing unit.

In one embodiment, for the Manchester transceiver device, the rising edge or the falling edge of the input signal is detected according to the time point of the rising edge of the internal clock to determine the data "1" or the data "0". "data of.

In one embodiment, for the Manchester transceiver device, data is inverted to obtain the data string of the input signal.

In one embodiment, for the Manchester transceiver device, the data string uses 8 bits of data to form a word data.

In an embodiment, for the Manchester transceiver device, the processing unit of the sending unit uses two 16 bits to parse one digit of Manchester.

In one embodiment, for the Manchester transceiver device, the "0" signal of Manchester is converted and sent from 0x0 and 0xFFF, and the "1" signal of Manchester is converted and sent from 0xFFF and 0x0.

The drawings are included in order to further understand the new creation, and the drawings are incorporated into this specification and constitute a part of this specification. The drawings illustrate the embodiments of the new creation, and together with the description are used to explain the principles of the new creation.

This new creation is about a Manchester signal transceiver, which is used to decode the Manchester signal and encode the transmitted data into a Manchester analog signal. The aforementioned Manchester signal transceiver device may be an optically modulated Manchester signal transceiver device. The decoding process may not need to use a processing unit, such as a central processing unit or a CPU, to analyze the pulse width of the signal. In one embodiment of the Manchester transceiver device created by the present invention, the decoding process can use the hardware processing function of the Serial Peripheral Interface (SPI), and after appropriately adjusting the operation mode of the serial peripheral interface, it can receive Manchester signals for decoding.

In one embodiment, the function of the serial peripheral interface performs the decoding of Manchester signals, so that the Manchester decoding device can be achieved under the hardware architecture of the serial peripheral interface without involving the processing of the central processing unit.

A number of embodiments are described below, but the present invention is not limited to the embodiments described.

FIG. 1 is a schematic diagram of an embodiment of the present invention, which uses a serial peripheral interface to achieve a Manchester transceiver device. Referring to FIG. 1, in one embodiment, the Manchester transceiver device 50 includes a receiving unit 100 and a sending unit 200. The receiving unit 100 receives the Manchester analog signal 30 through the endpoint 32 for decoding. The sending unit 200 parses and encodes the digital data to be sent into digital data conforming to the Manchester waveform, and then converts it into an analog signal 36 in chronological order, and transmits it through the endpoint 34.

The structure and operation mechanism of the receiving unit 100 and the sending unit 200 are further described below.

First, the decoding mechanism of the receiving unit 100 will be explained. The receiving unit 100 can be used as a Manchester decoding device, for example, a device including a serial peripheral interface. The serial peripheral interface is used for a string of bit data, which is sent from the master device to the slave device. The ability of the serial peripheral interface is to determine the logic level of the signal in the corresponding cycle according to the rising or falling edge of the signal and the cycle of the clock. The low level and high level determine the value of the bit data as "0". "Or "1".

The analog signal 30 of Manchester is received by the comparator 52. The reference terminal of the comparator 52 receives the analog reference signal for conversion into the square wave input signal 112.

In one embodiment, the remote device needs to generate the Manchester analog signal 30, which uses, for example, an electrical/optical conversion device or a light-emitting transistor, and emits two different intensities of light corresponding to "0" or "1", and then passes through The amplitude modulation, that is, the so-called top adjustment processing, obtains the Manchester coded analog signal 30. Here, the analog signal 30 received by the Manchester transceiver 50 created by the present invention is the analog signal 30 that has been Manchester-encoded at the remote device. The creation of the new model does not limit how the remote device generates the analog signal 30.

In one embodiment, the novel creation uses a comparator 52 to convert the analog signal 30 into a square wave input signal 112 based on the analog reference signal. After that, the input signal 112 is directly decoded based on the operation of the peripheral interface of the sequence. The processing unit is consumed to process the pulse width.

From the perspective of the hardware configuration, the serial peripheral interface of the receiving unit 100 includes multiple endpoints. For example, the endpoint 102 is a host output and a slave input endpoint, represented by SPI_MOSI. Other endpoints also include endpoint 104, which is a rising edge or falling edge capture endpoint, represented by Timer_capture, and is also called a timing capture endpoint. In operation, the endpoint 102 and the endpoint 104 simultaneously receive input signals in Manchester format. The endpoint 106 is an internal clock endpoint and is represented by GPIO. The endpoint 108 is an output endpoint, using SPI_CLK. In operation, the internal clock provided by the endpoint 106 is used as the clock 114 and fed back to the endpoint 108, that is, the internal clock of the serial peripheral interface is directly used as the decoded clock 114. The endpoint 110 is a chip select endpoint, represented by SPI_SS, and the peripheral interface of the sequence can be set to operate as a slave device.

In one embodiment, as a whole, the decoding operation of the receiving unit 100 of the Manchester transceiver is an operation of setting the serial peripheral interface as a slave device, for example, the chip select terminal SPI_SS is grounded to maintain a low voltage. The serial peripheral interface receives the Manchester format input signal 112 through the signal receiving terminal 102 and the rising or falling edge capture terminal 104, and sequentially obtains the rising of the input signal through the internal operation of the serial peripheral interface Edge and falling edge, the mechanism is shown in Figure 2. The serial peripheral interface obtains serial data according to the rising edge and the falling edge according to the internal clock in the terminal 106 for subsequent use. For another example, after inverting the obtained serial data, the bit value of the data carried by the input signal is obtained, which is stored for use in other subsequent operations.

Fig. 2 is a schematic diagram of the signal relationship of the Manchester decoding mechanism using the sequence peripheral interface in an embodiment of the present invention. 1 and 2, the signal 150 represents a sequence of bit data, for example, "01011001" which uses 8 bit data as one word data.

According to the Manchester encoding format, it is converted into an input signal 112 that represents bit data with a pulse width, which is represented in the form of a square wave. The input signal 112 includes a rising edge and a falling edge. The logical level of the signal behind the rising edge is "1" corresponding to the high level. The logic level of the signal behind the falling edge is "0" corresponding to the low level. The rising edge and falling edge of the input signal 112 input from the terminal 104 can be detected.

The clock 114 input from the endpoint 108 is modified to be provided by the internal clock of the endpoint 106 because of the serial peripheral interface. According to the period of the clock 114, it can be detected whether the signal leading edge of the input signal of the current period is a rising edge or a falling edge. The rising edge represents the logical level of the signal is "1" corresponding to the high level. The falling edge represents the logic level of the signal is "0" corresponding to the low level. Using the internal clock 114 to perform the aforementioned decoding, the serial data 116 at this stage can be obtained. The signal 118 can terminate a string of data, for example, a packet unit of 8 digits.

It can be noted here that the content of the serial data 116 is "10100110", which is the inverse of the content of the input signal 112 "01011001". Therefore, in one embodiment, the serial data 116 can be inverted later to obtain the content of the input signal 112. Here, the operation of inversion is not limited to a specific method. For example, the input signal 112 may also be inverted and then input. Or when the clock 114 is used for decoding, it can also be directly inverted. Or it may be reversed in an external circuit. The new creation is not limited to the reversed approach.

This new creation proposes a Manchester signal decoding device, which uses the function of the peripheral interface of the sequence. After proper adjustment, the Manchester signal can be decoded according to the function of the peripheral interface of the sequence, without the need to use the central processing unit to determine the pulse width of the signal. Analyze to achieve decoding.

Corresponding to the operation of high-frequency signal transmission, the novel creation can achieve the decoding of Manchester signals without actually consuming the computational load of the central processing unit. The saved load of the central processing unit can improve the overall performance under the operating conditions of high-frequency signal transmission.

Referring to FIG. 1 again, the encoding mechanism of the sending unit 200 will be described below. In an embodiment, the sending unit 200 includes a processing unit 60, which is represented by, for example, a central processing unit CPU. The sending unit 200 may further include a memory unit 62, which is represented by a static random access memory SRAM as an example. The sending unit 200 may also include a peripheral direct memory access (PDMA) 64 and a digital-to-analog conversion unit 66. The peripheral direct memory access unit 64 is triggered by the time control unit ctrl 68 of the sending unit 200 to transmit the Manchester-encoded digital data of the memory unit 62 to the digital-to-analog conversion unit 66 for conversion into an analog output signal 36. Terminal 34 output.

For the Manchester encoding process, for example, the processing unit 60 analyzes the data to be sent into digital data of Manchester waveform, such as the relationship between the digital signal 150 and the input signal 112 in FIG. 2. The memory unit 62 stores the digital data. The peripheral direct memory access unit 64 is triggered by the time control unit 68 in accordance with the time control conforming to the Manchester waveform, and transmits the digital data stored in the memory unit to the digital-to-analog conversion unit 66 to convert And send.

It is also specifically explained that, in one embodiment, the processing unit 60 of the sending unit 200 uses two 16 bits to parse one digit of Manchester.

In one embodiment, for the Manchester transceiver 50, the "0" signal of Manchester is converted and sent from 0x0 and 0xFFF, and the "1" signal of Manchester is converted and sent from 0xFFF and 0x0. In other words, to transmit one bit of Manchester data, for example, a memory length of 4 words will be used.

In an embodiment, the processing unit 60 of the sending unit 200 created by the present invention does not need to be arranged inside the sending unit 200, but may be processed by an external circuit, and then the data is stored in the memory unit 62.

In response to the rapid and large-scale transmission of data, the new creation can be processed efficiently with Manchester encoding and decoding involved. It can be completed by only minor modifications and operations on the peripheral interface of the sequence, reducing the overall encoding and decoding of the central processing unit. The load allows the central processing unit to process other operations, and improves the operating efficiency of the overall electronic device.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the new creation, not to limit it; although the new creation is described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the new creation claims .

30: analog signal 32, 34: Endpoint 36: analog signal 50: Manchester Transceiver 52: Comparator 60: processing unit 62: memory unit 64: Peripheral direct memory access unit 66: Digital to analog conversion unit 68: Time Control Unit 100: receiving unit 102, 104, 106, 108, 110: endpoint 112: Input signal 114: clock 116: serial data 118: Signal 150: signal 200: sending unit

FIG. 1 is a schematic diagram of an embodiment of the present invention, which uses a serial peripheral interface to achieve a Manchester transceiver device. Fig. 2 is a schematic diagram of the signal relationship of the Manchester decoding mechanism using the sequence peripheral interface in an embodiment of the present invention.

30: analog signal

32, 34: Endpoint

36: analog signal

50: Manchester Transceiver

52: Comparator

60: processing unit

62: memory unit

64: Peripheral direct memory access unit

66: Digital to analog conversion unit

68: Time Control Unit

100: receiving unit

102, 104, 106, 108, 110: endpoint

112: Input signal

114: clock

200: sending unit

Claims (10)

A Manchester transceiver device, including: Receiving unit; and Sending unit, The receiving unit includes: The comparator receives the Manchester analog signal and converts it into an input signal in the form of a square wave; and The serial peripheral interface is set as the operation of the slave device. It receives the input signal in the form of a square wave through the signal receiving endpoint and the timing capture endpoint, and obtains the input signal in sequence through the internal operation of the serial peripheral interface The serial peripheral interface obtains serial data according to the rising edge and the falling edge according to the internal clock for subsequent use, The sending unit includes: The processing unit analyzes the data to be sent into digital data of Manchester waveform; A memory unit storing the digital data; Peripheral direct memory access unit; and Digital to analog conversion unit, The peripheral direct memory access unit is activated according to time control conforming to the Manchester waveform, and transmits the digital data stored in the memory unit to the digital-to-analog conversion unit for conversion and transmission. The Manchester transceiver device according to claim 1, wherein the serial peripheral interface further includes inverting the serial data to obtain the serial data carried by the input signal. The Manchester transceiver device according to claim 1, wherein the chip select terminal of the serial peripheral interface is grounded, so that the serial peripheral interface is set as the operation of the slave device. The Manchester transceiver device according to claim 1, wherein the host output slave input pin of the serial peripheral interface is used as the signal receiving end point to receive the input signal. The Manchester transceiver device according to claim 1, wherein the clock input terminal of the serial peripheral interface is connected to an internal clock terminal, and the internal clock of the serial peripheral interface is provided to the clock input terminal. The Manchester transceiver device according to claim 1, wherein the decoding operation of the serial peripheral interface does not involve the operation of the processing unit. The Manchester transceiver device according to claim 1, wherein the rising edge or the falling edge of the input signal is detected according to the time point of the rising edge of the internal clock to determine the data "1" or the data "0" "data of. The Manchester transceiver device according to claim 7, wherein the data is inverted to obtain the data string of the input signal. The Manchester transceiver device according to claim 7, wherein the serial peripheral interface does not involve detecting the pulse width to determine the data value. The Manchester transceiver device according to claim 1, wherein the processing unit of the sending unit uses two 16-bit storage units to parse one digit of Manchester.

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