GNSS receiver with serial port switching function
By introducing a serial port switching module into the GNSS receiver, using the MAX3243 chip to detect the RS232 signal and control the analog switch, the problem of insufficient serial ports in the small integrated GNSS receiver is solved, and fast and timely serial port switching is achieved, ensuring signal paths normal operation.
Patent Information
- Application Number
- CN202421048453.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-14
AI Technical Summary
In the small integrated GNSS receiver design, the radio module and the Bluetooth module usually have only one pair of serial ports available, resulting in a lack of available serial ports when changing module settings or direct communication, and an inability to achieve effective serial port switching.
A GNSS receiver including a serial switch module is designed. The module consists of a serial switch chip, a first serial switch circuit and a second serial switch circuit. The valid RS232 signal is detected through the MAX3243 chip and the two-choice analog switch is controlled to realize Serial port switching.
Through the effective signal detection and control of analog switch of the serial switch module, the serial switch of the GNSS receiver without the control of the MCU module is realized, which solves the problem of insufficient serial ports of the module, and has a fast response time, ensuring the timeliness of the signal.
Smart Images
Figure CN222356355U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of GNSS receivers, in particular to a GNSS receiver with a serial port switching function. Background Art
[0002] When designing a small, all-in-one GNSS receiver, an MCU module is often omitted to save costs. Instead, the GNSS module connects directly to modules like the radio and Bluetooth receivers via serial ports. Transmitted data is converted to RS232 signals via a level conversion chip. However, radio and Bluetooth modules often only have a pair of serial ports available, leaving them unavailable for configuration changes or direct communication with the module.
[0003] Therefore, the existing technology has defects and needs to be improved. Utility Model Content
[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a GNSS receiver with a serial port switching function.
[0005] The technical solution of the present invention is as follows: The present invention provides a GNSS receiver with a serial port switching function, comprising: a radio module, a GNSS module and a Bluetooth module, and is characterized in that it also includes: a serial port switching module, the serial port switching module including: a serial port switching chip, a first serial port switching circuit and a second serial port switching circuit, the first serial port switching circuit and the second serial port switching circuit are both electrically connected to the serial port switching chip, the radio module is electrically connected to the first serial port switching circuit, the GNSS module is electrically connected to the first serial port switching circuit and the second serial port switching circuit respectively, the Bluetooth module is electrically connected to the second serial port switching circuit, and the serial port switching module is used to detect whether there is a valid RS232 signal and output a corresponding level signal to the first serial port switching circuit and the second serial port switching circuit for serial port switching.
[0006] Furthermore, the serial port switching chip is a MAX3243 chip, the first serial port switching circuit and the second serial port switching circuit are integrated into a serial port switching unit, the serial port switching unit includes two two-to-one analog switches, and the 21st pin of the serial port switching chip is connected to control the two-to-one analog switches.
[0007] By adopting the above solution, the beneficial effects of the utility model are as follows: by setting up a serial port switching module, the analog switch is controlled by the effective signal detection output pin of the MX3243 chip to switch the serial port path, thereby solving the problem of insufficient module serial ports of the GNSS receiver without the control of the MCU module; only one analog switch chip is required for control, and the response time is extremely fast, ensuring the timeliness of the signal. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 This is a structural diagram of an embodiment of the present utility model.
[0009] Figure 2 This is a circuit diagram of a serial port switching module according to an embodiment of the present invention. DETAILED DESCRIPTION
[0010] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0011] Please refer to Figure 1 and Figure 2 In this embodiment, the utility model provides a GNSS receiver with a serial port switching function, including: a radio module, a GNSS module and a Bluetooth module, characterized in that it also includes: a serial port switching module, the serial port switching module including: a serial port switching chip U1, a first serial port switching circuit and a second serial port switching circuit, the first serial port switching circuit and the second serial port switching circuit are both electrically connected to the serial port switching chip U1, the radio module is electrically connected to the first serial port switching circuit, the GNSS module is electrically connected to the first serial port switching circuit and the second serial port switching circuit respectively, the Bluetooth module is electrically connected to the second serial port switching circuit, the serial port switching module detects whether there is a valid RS232 signal and outputs a corresponding level signal to the first serial port switching circuit and the second serial port switching circuit for serial port switching.
[0012] Furthermore, the serial port switching chip U1 is a MAX3243 chip, the first serial port switching circuit and the second serial port switching circuit are integrated into a serial port switching unit, the serial port switching unit includes two two-to-one analog switches U2 and U3, and the 21st pin of the serial port switching chip U1 is connected to control the two-to-one analog switches U2 and U3.
[0013] Please refer to Figure 1 and Figure 2 In this embodiment, the GNSS receiver can communicate with external devices through the serial port switching chip U1. When there is no valid input RS232 signal from the outside, the 21st pin of the serial port switching chip U1 outputs a low level to the two-choice analog switches U2 and U3, thereby controlling the normal communication connection between the radio module, Bluetooth module and GNSS module through the two-choice analog switches U2 and U3; when there is a valid input RS232 signal from the outside, the 21st pin of the serial port switching chip U1 outputs a high level to the two-choice analog switches U2 and U3, thereby switching the radio module, Bluetooth module and the serial port switching chip U1 to connect, thereby realizing connection with the outside and controlling or configuring the radio module and Bluetooth module.
[0014] In summary, the beneficial effects of this solution are as follows: by setting up a serial port switching module, the analog switch is controlled by the valid signal detection output pin of the MX3243 chip to switch the serial port path, solving the problem of insufficient serial ports of the GNSS receiver module without MCU module control; only one analog switch chip is required for control, and the response time is extremely fast, ensuring the timeliness of the signal.
[0015] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A GNSS receiver with a serial port switching function, comprising: The radio module, GNSS module and Bluetooth module are characterized in that they also include: a serial port switching module, the serial port switching module includes: a serial port switching chip, a first serial port switching circuit and a second serial port switching circuit, the first serial port switching circuit and the second serial port switching circuit are both electrically connected to the serial port switching chip, the radio module is electrically connected to the first serial port switching circuit, the GNSS module is electrically connected to the first serial port switching circuit and the second serial port switching circuit respectively, the Bluetooth module is electrically connected to the second serial port switching circuit, and the serial port switching module is used to detect whether there is a valid RS232 signal and output a corresponding level signal to the first serial port switching circuit and the second serial port switching circuit for serial port switching.
2. The GNSS receiver with serial port switching function according to claim 1, characterized in that: The serial port switching chip is a MAX3243 chip, the first serial port switching circuit and the second serial port switching circuit are integrated into a serial port switching unit, the serial port switching unit includes two two-to-one analog switches, and the 21st pin of the serial port switching chip is connected to control the two-to-one analog switch.