CN219697633U - RF radio frequency signal receiving plate - Google Patents
RF radio frequency signal receiving plate Download PDFInfo
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- CN219697633U CN219697633U CN202320800591.5U CN202320800591U CN219697633U CN 219697633 U CN219697633 U CN 219697633U CN 202320800591 U CN202320800591 U CN 202320800591U CN 219697633 U CN219697633 U CN 219697633U
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Abstract
The utility model discloses an RF radio frequency signal receiving board which comprises an MCU unit, an RF radio frequency receiving unit, a power supply unit and an SPI communication unit, wherein the MCU unit is respectively connected with the power supply unit and the SPI communication unit, the power supply unit is respectively connected with the RF radio frequency receiving unit and the SPI communication unit, the RF radio frequency receiving unit is connected with the SPI communication unit, and the MCU unit is used for receiving a data signal sent by the RF radio frequency receiving unit through the SPI communication unit, sending an instruction signal to the RF radio frequency receiving unit through the SPI communication unit and then pairing with the RF radio frequency receiving unit through a unique ID. The RF receiving unit is used for receiving RF radio frequency signals, the distance for receiving remote control signals is long, the remote control signals are free from angle limitation, and the MCU unit is matched with the unique ID of the RF receiving unit, so that interference is reduced, and the remote control unit can be widely applied to the technical field of radio frequency.
Description
Technical Field
The utility model relates to the technical field of radio frequency, in particular to an RF radio frequency signal receiving plate.
Background
With the development of the age, more and more devices need to be remotely controlled, so as to control and set the remotely controlled devices. Most of the traditional remote control signal receiving boards are infrared wireless remote control signal receiving boards, but the existing infrared wireless remote control signal receiving boards are short in receiving distance and limited in angle, and the main board is easy to receive interference.
Disclosure of Invention
Accordingly, an objective of the present utility model is to provide an RF signal receiving board, which can increase the signal receiving distance of the signal receiving board, has no angular limitation, and reduces the interference of the main board.
In a first aspect, an embodiment of the present utility model provides an RF radio frequency signal receiving board, including: the MCU unit is respectively connected with the power supply unit and the SPI communication unit, the power supply unit is respectively connected with the RF radio frequency receiving unit and the SPI communication unit, the RF radio frequency receiving unit is connected with the SPI communication unit, the MCU unit is used for receiving data signals sent by the RF radio frequency receiving unit through the SPI communication unit, sending instruction signals to the RF radio frequency receiving unit through the SPI communication unit, then pairing with the RF radio frequency receiving unit through a unique ID, and the RF radio frequency receiving unit is used for receiving RF radio frequency signals and sending data signals to the MCU unit through the SPI communication unit.
Optionally, the MCU unit includes a chip GPM8750A and chip GPM8750A peripheral circuitry.
Optionally, the RF radio frequency receiving unit includes a chip XN279L and a chip XN279L peripheral circuit.
Optionally, the peripheral circuit of the chip XN279L includes a crystal oscillator circuit, and the crystal oscillator circuit is connected with the chip XN 279L.
Optionally, the crystal oscillator circuit includes clock crystal oscillator, first resistance, first electric capacity and second electric capacity, the first end of clock crystal oscillator with the first end of first electric capacity is connected, the second end of clock crystal oscillator with the first end of second electric capacity is connected, the second end of first electric capacity with the first end of first resistance is connected, the second end of first resistance with chip XN279L is connected, the second end of second electric capacity with chip XN279L is connected.
Optionally, the peripheral circuit of the chip XN279L includes a radio frequency antenna receiving circuit, and the radio frequency antenna receiving circuit is connected with the chip XN 279L.
Optionally, the radio frequency antenna receiving circuit includes a receiving antenna, a first inductor and a third capacitor, where the receiving antenna is connected with a first end of the first inductor, a second end of the first inductor is connected with a first end of the third capacitor, and a second end of the third capacitor is connected with the chip XN 279L.
Optionally, the radio frequency antenna receiving circuit further includes a fourth capacitor, a first end of the fourth capacitor is connected to the first end of the first inductor, and a second end of the fourth capacitor is grounded.
Optionally, the SPI communication unit includes an external communication circuit, and the external communication circuit is connected with the MCU unit.
Optionally, the external communication circuit includes a first transistor, a second transistor and a third transistor, and the first transistor, the second transistor and the third transistor are all connected with the MCU unit.
The embodiment of the utility model has the following beneficial effects: the embodiment of the utility model provides an RF radio frequency signal receiving board, which comprises an MCU unit, an RF radio frequency receiving unit, a power supply unit and an SPI communication unit, wherein the MCU unit is respectively connected with the power supply unit and the SPI communication unit, the power supply unit is respectively connected with the RF radio frequency receiving unit and the SPI communication unit, the RF radio frequency receiving unit is connected with the SPI communication unit, the MCU unit is used for receiving a data signal sent by the RF radio frequency receiving unit through the SPI communication unit, sending an instruction signal to the RF radio frequency receiving unit through the SPI communication unit, and then being paired with the RF radio frequency receiving unit through a unique ID, and the RF radio frequency receiving unit is used for receiving the RF radio frequency signal and sending the data signal to the MCU unit through the SPI communication unit. The RF receiving unit is used for receiving RF radio frequency signals, the distance for receiving remote control signals is long, the remote control signals are free from angle limitation, and the MCU unit is matched with the unique ID of the RF receiving unit, so that interference is reduced.
Drawings
Fig. 1 is a block diagram of an RF signal receiving board according to an embodiment of the present utility model;
FIG. 2 is a schematic circuit diagram of an MCU unit according to an embodiment of the present utility model;
fig. 3 is a schematic circuit diagram of an RF radio frequency receiving unit according to an embodiment of the present utility model;
FIG. 4 is a schematic circuit diagram of a power supply unit according to an embodiment of the present utility model;
fig. 5 is a schematic circuit diagram of an external communication circuit according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In embodiments of the utility model, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
Referring to fig. 1, an embodiment of the present utility model provides an RF radio frequency signal receiving board, including an MCU unit, an RF radio frequency receiving unit, a power supply unit, and an SPI communication unit, where the MCU unit is connected to the power supply unit and the SPI communication unit, the power supply unit is connected to the RF radio frequency receiving unit and the SPI communication unit, the RF radio frequency receiving unit is connected to the SPI communication unit, and the MCU unit is configured to receive a data signal sent by the RF radio frequency receiving unit through the SPI communication unit, send an instruction signal to the RF radio frequency receiving unit through the SPI communication unit, and then pair with the RF radio frequency receiving unit through a unique ID, and the RF radio frequency receiving unit is configured to receive an RF radio frequency signal and send a data signal to the MCU unit through the SPI communication unit.
The power supply unit is used for converting direct current voltage and inputting the direct current voltage into the MCU unit, the SPI communication unit and the RF radio frequency receiving unit.
It should be noted that, the control method of the MCU unit adopts the existing method.
Specifically, the power supply unit supplies power to the MCU unit to enable the receiving board to work, and the power supply unit supplies power to the RF radio frequency receiving unit to enable the RF radio frequency receiving unit to work; after the MCU unit is paired with the RF radio frequency receiving unit, the MCU unit receives the data signal output by the RF radio frequency receiving unit, so that a corresponding instruction signal is sent to the equipment according to the data signal.
Referring to fig. 2 and 3, the MCU unit optionally includes a chip GPM8750A and chip GPM8750A peripheral circuits.
Optionally, the RF radio frequency receiving unit includes a chip XN279L and a chip XN279L peripheral circuit.
Optionally, the peripheral circuit of the chip XN279L includes a crystal oscillator circuit, and the crystal oscillator circuit is connected with the chip XN 279L.
Optionally, the crystal oscillator circuit includes clock crystal oscillator, first resistance, first electric capacity and second electric capacity, clock crystal oscillator's first end with first electric capacity's first end is connected, clock crystal oscillator's second end with second electric capacity's first end is connected, first electric capacity's second end is connected with first electric resistance's first end, first electric resistance's second end with chip XN279L is connected, second electric capacity's second end with chip XN279L is connected.
Optionally, the peripheral circuit of the chip XN279L includes a radio frequency antenna receiving circuit, and the radio frequency antenna receiving circuit is connected with the chip XN 279L.
Optionally, the radio frequency antenna receiving circuit includes a receiving antenna, a first inductor and a third capacitor, where the receiving antenna is connected with a first end of the first inductor, a second end of the first inductor is connected with a first end of the third capacitor, and a second end of the third capacitor is connected with the chip XN 279L.
Optionally, the radio frequency antenna receiving circuit further includes a fourth capacitor, a first end of the fourth capacitor is connected to the first end of the first inductor, and a second end of the fourth capacitor is grounded.
In a specific embodiment, the MCU unit includes a chip GPM8750A, a decoupling capacitor C1, the capacitor C1 filters chip noise, and the coupling capacitors C3 and C13 filter access power supply noise. The RF radio frequency receiving unit comprises a chip XN297L, the XN297L chip is a single-chip wireless transceiver chip working in the 2.400-2.483 GHz world general ISM frequency band, the chip integrates a radio frequency transceiver, a frequency generator, a crystal oscillator, a modem and other functional modules, a pair of multi-group network and communication modes with ACK (Acknowledge character, confirm characters) are supported, the transmitting output power, the working channel and the communication data rate are configurable, and the chip integrates a plurality of peripheral chip resistance-capacitance sensing devices into the chip, so that the chip has lower power consumption, saves peripheral devices and has excellent performance. Chip XN297L of RF radio frequency receiving unit is connected with chip GPM8750A of MCU unit through SPI (Serial Peripheral Interface ) communication unit, specifically, pin 2 (end point CSN) of chip XN297L is connected with pin 13 (end point CSN) of chip GPM8750A, pin 3 (end point SCK) of chip XN297L is connected with pin 12 (end point SCK) of chip GPM8750A, pin 4 (end point MOSI) of chip XN297L is connected with pin 11 (end point MOSI) of chip GPM8750A, pin 5 (end point MISO) of chip XN297L is connected with pin 10 (end point MISO) of chip GPM 8750A; the chip GPM8750A of the MCU unit transmits signals to the chip XN297L of the RF radio frequency receiving unit through the SPI interface, then the chip XN297L is matched with the chip GPM8750A in a unique ID, the RF radio frequency receiving unit enters a receiving mode after the matching is successful, the receiving antenna ANT3 receives RF radio frequency signals and removes noises through the fourth capacitor C16 and the decoupling capacitor C24, and the first inductor L5 is matched and then is input into the RF radio frequency signal receiving pin 13 (ANT) of the chip XN297L through the filtering of the third capacitor; the capacitor C17 is a decoupling capacitor of an input power supply and filters noise; the crystal oscillator circuit 200 generates a clock crystal oscillator unified circuit, Y3 is a clock crystal oscillator, clock signals are generated, C11 and C10 are matching capacitors, crystal oscillation starting and stable oscillation of the clock crystal oscillator are assisted, a resistor R3 is a matching resistor, and the clock signals are input into the chip XN297L after being matched.
Referring to fig. 4, in a specific embodiment, the power supply unit includes a voltage conversion chip U2 converting an input 5V voltage into a direct voltage of 3.3V (VDD), and inputting the converted voltage to the MCU unit and the RF radio frequency receiving unit. Decoupling capacitor C9 filters output power supply end noise, C8 filters input power supply end noise, and resistor R14 matches input voltage.
Referring to fig. 5, optionally, the SPI communication unit includes an external communication circuit, and the external communication circuit is connected to the MCU unit.
Optionally, the external communication circuit includes a first transistor, a second transistor and a third transistor, all connected with the MCU unit
In a specific embodiment, the MCU communicates with the external motherboard through an external communication circuit of the SPI communication unit, and receives the data signal of the RF radio frequency receiving unit, and then processes and outputs a corresponding electrical signal to the external motherboard. Specifically, an endpoint spi_csn of the external communication circuit is connected with an endpoint spi_csn (pin 6) of the MCU chip GPM8750A, an endpoint spi_clk of the external communication circuit is connected with an endpoint spi_clk (pin 5) of the MCU chip GPM8750A, an endpoint spi_miso of the external communication circuit is connected with an endpoint spi_miso (pin 4) of the MCU chip GPM8750A, and an endpoint spi_mosi of the external communication circuit is connected with an endpoint spi_mosi (pin 3) of the MCU chip GPM 8750A; the external communication circuit transmits electric signals to the external communication circuit through endpoints SPI_CSN, SPI_CLK, SPI_MISO and SPI_MOSI, the external communication circuit transmits electric signals to the external mainboard through endpoints SO, SDA, SCK _H and CS, specifically, an endpoint SO of the external communication circuit is connected with an endpoint SO of J2, an endpoint SDA of the external communication circuit is connected with an endpoint SDA of J2, an endpoint SCK_H of the external communication circuit is connected with an endpoint SCK_H of J2, an endpoint CS of the external communication circuit is connected with an endpoint CS of J2, and the external mainboard is connected with the endpoint J2 and then receives input electric signals. The first transistor Q1 is a MOS transistor and is used for switching on and off a signal of an endpoint SPI_CLK; the second transistor Q2 is a MOS transistor for switching on and off the signal of the endpoint SPI_MISO, and the third transistor Q3 is a MOS transistor for switching on and off the signal of the endpoint SPI_MOSI.
In a specific embodiment, after the main board is powered on, the main control MCU unit is initialized, and after the main control MCU unit is initialized, an SPI initialization signal is sent to the chip of the RF radio frequency receiving unit, and the main control MCU unit waits for the chip of the RF radio frequency receiving unit to reach. If the chip of the RF radio frequency receiving unit is not reached, resetting the chip of the RF radio frequency receiving unit, re-initializing, continuously and three times without being reached, initializing and reporting errors by RF communication, if a response signal is received, setting the chip of the RF radio frequency receiving unit as an RX receiving mode, reading the unique ID of the MCU unit to a cache array, when no ID is memorized, starting 60S timing, when the read IRQ pin is at a low level, the RF radio frequency receiving unit receives data, setting the chip of the RF radio frequency receiving unit as a waiting mode, not receiving the data at this time, reading RXFIFO mailbox data, after the data is read, clearing the RXFIFO mailbox data, setting the chip of the RF radio frequency receiving unit as an RX receiving mode (when the IRQ pin is at a high level, judging the length of the received data, checking the data code, then judging the data type, and the data type are as follows:
when the universal ID data type is received, the data is directly output to the main board through an external interface SPI.
And when the pairing signal is received, judging whether the power-on exceeds 60S, receiving an ID pairing code in the power-on 60S, updating ID data to a buffer, and simultaneously writing the data into a DATAFLAG of the MCU unit to realize power-down memory ID storage. When the matching signal is received over 10S, the data is discarded, and other users are prevented from being paired.
When normal communication data is received, judging whether the data is the same as the pairing memory ID, if so, outputting the data to the main board through an external interface SPI, otherwise, discarding the data.
The embodiment of the utility model has the following beneficial effects: the embodiment of the utility model provides an RF radio frequency signal receiving board, which comprises an MCU unit, an RF radio frequency receiving unit, a power supply unit and an SPI communication unit, wherein the MCU unit is respectively connected with the power supply unit and the SPI communication unit, the power supply unit is respectively connected with the RF radio frequency receiving unit and the SPI communication unit, the RF radio frequency receiving unit is connected with the SPI communication unit, the MCU unit is used for receiving a data signal sent by the RF radio frequency receiving unit through the SPI communication unit, sending an instruction signal to the RF radio frequency receiving unit through the SPI communication unit, and then being paired with the RF radio frequency receiving unit through a unique ID, and the RF radio frequency receiving unit is used for receiving the RF radio frequency signal and sending the data signal to the MCU unit through the SPI communication unit. The RF receiving unit is used for receiving RF radio frequency signals, the distance for receiving remote control signals is long, the remote control signals are free from angle limitation, and the MCU unit is matched with the unique ID of the RF receiving unit, so that interference is reduced. The frequency hopping technology is adopted to control and pair with unique ID codes, so that the control is stable, mutual interference is avoided, and the two-way 1K-64K random communication rate and the data length are compatible with 4-32 bytes.
While the preferred embodiment of the present utility model has been described in detail, the utility model is not limited to the embodiment, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the utility model, and these equivalent modifications and substitutions are intended to be included in the scope of the present utility model as defined in the appended claims.
Claims (10)
1. The RF radio frequency signal receiving board is characterized by comprising an MCU unit, an RF radio frequency receiving unit, a power supply unit and an SPI communication unit, wherein the MCU unit is respectively connected with the power supply unit and the SPI communication unit, the power supply unit is respectively connected with the RF radio frequency receiving unit and the SPI communication unit, the MCU unit is used for receiving data signals sent by the RF radio frequency receiving unit through the SPI communication unit, sending instruction signals to the RF radio frequency receiving unit through the SPI communication unit, and then being paired with the RF radio frequency receiving unit through a unique ID, and the RF radio frequency receiving unit is used for receiving RF radio frequency signals and sending the data signals to the MCU unit through the SPI communication unit.
2. The RF radio frequency signal receiving board of claim 1, wherein the MCU unit includes a chip GPM8750A and chip GPM8750A peripheral circuitry.
3. The RF signal receiving panel of claim 1, wherein the RF radio frequency receiving unit includes a chip XN279L and a chip XN279L peripheral circuit.
4. The RF signal receiving panel of claim 3, wherein the chip XN279L peripheral circuitry comprises crystal oscillator circuitry, the crystal oscillator circuitry being coupled to the chip XN 279L.
5. The RF signal receiving panel of claim 4, wherein the crystal oscillator circuit comprises a clock crystal oscillator, a first resistor, a first capacitor and a second capacitor, wherein the first end of the clock crystal oscillator is connected to the first end of the first capacitor, the second end of the clock crystal oscillator is connected to the first end of the second capacitor, the second end of the first capacitor is connected to the first end of the first resistor, the second end of the first resistor is connected to the chip XN279L, and the second end of the second capacitor is connected to the chip XN 279L.
6. The RF radio frequency signal receiving panel of claim 3, wherein the chip XN279L peripheral circuitry comprises radio frequency antenna receiving circuitry, the radio frequency antenna receiving circuitry being coupled to the chip XN 279L.
7. The RF radio frequency signal receiving board of claim 6, wherein the radio frequency antenna receiving circuit comprises a receiving antenna, a first inductor, and a third capacitor, the receiving antenna being connected to a first end of the first inductor, a second end of the first inductor being connected to a first end of the third capacitor, a second end of the third capacitor being connected to the chip XN 279L.
8. The RF signal receiving panel of claim 7, wherein the RF antenna receiving circuit further comprises a fourth capacitor, a first end of the fourth capacitor being connected to the first end of the first inductor, a second end of the fourth capacitor being grounded.
9. The RF radio frequency signal receiving board of claim 1, wherein the SPI communication unit comprises an external communication circuit, the external communication circuit being connected to the MCU unit.
10. The RF radio frequency signal receiving board of claim 9, wherein the external communication circuit includes a first transistor, a second transistor, and a third transistor, each of the first transistor, the second transistor, and the third transistor being connected to the MCU unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320800591.5U CN219697633U (en) | 2023-04-11 | 2023-04-11 | RF radio frequency signal receiving plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320800591.5U CN219697633U (en) | 2023-04-11 | 2023-04-11 | RF radio frequency signal receiving plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219697633U true CN219697633U (en) | 2023-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320800591.5U Active CN219697633U (en) | 2023-04-11 | 2023-04-11 | RF radio frequency signal receiving plate |
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|---|---|
| CN (1) | CN219697633U (en) |
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- 2023-04-11 CN CN202320800591.5U patent/CN219697633U/en active Active
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