CN104462001A - Multi-serial port multiplexing circuit for GNSS receiver and multiplexing method thereof - Google Patents
Multi-serial port multiplexing circuit for GNSS receiver and multiplexing method thereof Download PDFInfo
- Publication number
- CN104462001A CN104462001A CN201510005005.8A CN201510005005A CN104462001A CN 104462001 A CN104462001 A CN 104462001A CN 201510005005 A CN201510005005 A CN 201510005005A CN 104462001 A CN104462001 A CN 104462001A
- Authority
- CN
- China
- Prior art keywords
- switch unit
- path analoging
- serial port
- analoging switch
- described path
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4027—Coupling between buses using bus bridges
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The invention relates to a multi-serial port multiplexing circuit for a GNSS receiver. The circuit comprises a level conversion module and a multi-serial port multiplexing module; the multi-serial port multiplexing module comprises a first two-circuit analog switch unit, a second two-circuit analog switch unit and four circuits of analog switch units, the first two-circuit analog switch unit is connected with the level conversion module, the second two-circuit analog switch unit and the four circuits of analog switch units, the second two-circuit analog switch unit is connected with a debugging serial port of a GPS board card and a debugging serial port of an ARM board, the four circuits of analog switch units are connected with debugging serial ports of a broadcasting station, and the level conversion module is connected with an upper computer. The invention further relates to a method for achieving GNSS receiver multi-serial port multiplexing. By means of the multi-serial port multiplexing circuit for the GNSS receiver and the multiplexing method, the design difficulty of the structure is reduced, the manufacturing cost of product connecting lines is reduced, and the anti-dropping capacity of the product is strengthened.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to GNSS receiver, specifically refer to a kind of Multi-serial port multiplex circuit for GNSS receiver and multiplexing method thereof.
Background technology
Current GNSS receiver trend Miniaturization Design, the quantity of external expansion interface too much can increase the design difficulty of structure, is not easy to realize the waterproof of product and anti-drop ability; Each external interface has corresponding interface connecting line, and it increases the design cost of accessories of a product.In addition, GNSS is the abbreviation of Global Navigation Satellite System, and Chinese translation should be GLONASS (Global Navigation Satellite System).
Summary of the invention
The object of the invention is the shortcoming overcoming above-mentioned prior art, provide a kind ofly can reduce structural design difficulty, the cost of manufacture reducing product connecting line, the Multi-serial port multiplex circuit for GNSS receiver strengthening the anti-drop ability of product and multiplexing method thereof.
To achieve these goals, the Multi-serial port multiplex circuit for GNSS receiver of the present invention and multiplexing method thereof have following formation:
This is used for the Multi-serial port multiplex circuit of GNSS receiver, and its principal feature is, described circuit comprises level switch module and multi-channel serial port multiplexing module; Described multi-channel serial port multiplexing module comprises the one or two path analoging switch unit, the two or two path analoging switch unit and four path analoging switch unit, the one or two described path analoging switch unit is connected with described level switch module, the two or two path analoging switch unit and four path analoging switch unit respectively, the two or two described path analoging switch unit is connected with the debug serial port of GPS board and the debug serial port of ARM plate respectively, four described path analoging switch unit are connected with the debug serial port in radio station, and described level switch module is connected with host computer; The control end of the described control end of the one or two path analoging switch unit, the control end of the two or two path analoging switch unit and four path analoging switch unit is connected with the multi-channel serial port multiplexing switch of ARM plate respectively.
Further, described level switch module is Transistor-Transistor Logic level and RS232 level switch module.
Further, the one or two described path analoging switch unit and the two or two described path analoging switch unit are DG2618 chip, the Enable Pin of the one or two described path analoging switch unit is connected with described ARM plate, the first input end of the one or two described path analoging switch unit is connected with the first Transistor-Transistor Logic level end of described level switch module, second input end of the one or two described path analoging switch unit is connected with the second Transistor-Transistor Logic level end of described level switch module, first output terminal of the one or two described path analoging switch unit is connected with the first input end of the two or two described path analoging switch unit, second output terminal of the one or two described path analoging switch unit is connected with the second input end of the two or two described path analoging switch unit, 3rd output terminal of the one or two described path analoging switch unit is connected with the second input end of four described path analoging switch unit, 4th output terminal of the one or two described path analoging switch unit is connected with the 3rd output terminal of four described path analoging switch unit, described the first output terminal of the two or two path analoging switch unit is connected with the first debug serial port of ARM plate, described the second output terminal of the two or two path analoging switch unit is connected with the second debug serial port of ARM plate, 3rd output terminal of the two or two described path analoging switch unit is connected with the first debug serial port of GPS board, 4th output terminal of the two or two described path analoging switch unit is connected with the second debug serial port of GPS board.
Further, four described path analoging switch unit are MC74HC157ADR2G chip, the first input end of four described path analoging switch unit, the 7th input end and the 8th input end are unsettled, 3rd input end and the 6th input end of four described path analoging switch unit are connected with radio station first debug serial port, and the first output terminal of four described path analoging switch unit is connected with radio station second debug serial port.
The invention still further relates to and a kind ofly realize the multiplexing method of GNSS receiver Multi-serial port, its principal feature is, described method comprises main processing procedure and interrupt processing process:
Described main processing procedure comprises the following steps:
(11) touch potential is set and zone bit is zero;
(12) judge whether to open first timer;
(13) if open first timer, then set the first timing, and touch potential is set and zone bit is 0, then continue step (15);
(14), if do not open first timer, then after waiting for first time period, step (12) is continued;
(15) whether the zone bit described in judgement is zero;
(16) if described zone bit is 0, then judge whether acknowledgement key is pressed;
(17), if described acknowledgement key is pressed, then after described touch potential adds 1, step (15) is continued;
(18) if described acknowledgement key is not pressed, then step (15) is continued;
(19) if described zone bit is not 0, then step (14) is continued;
Described interrupt processing process comprises the following steps:
(21) judge whether the first timing terminates;
(22) if the first timing terminates, then setting described zone bit is after 1, and whether the touch potential described in judgement is the first preset value;
(23) if described touch potential is the first preset value, then ARM plate communicates with host computer;
(24) if described touch potential is not the first preset value, then judge whether described touch potential is the second preset value;
(25) if described touch potential is the second preset value, then GPS board communicates with host computer;
(26) if described touch potential is not the second preset value, then judge whether described touch potential is the 3rd preset value;
(27) if described touch potential is the 3rd preset value, then radio station communicates with host computer;
(28) if described touch potential is not the 3rd preset value, then step (13) is continued;
(29) if the first timing does not terminate, then step (15) is continued.
Have employed the Multi-serial port multiplex circuit for GNSS receiver in this invention and multiplexing method thereof, the multiplexing single external interface realizing multi-channel serial port can be realized by the bridge joint of hardware circuit, the cost of hardware circuit design is more much lower than the cost of design 3 interface connecting lines, reduce structural design difficulty, reduce the cost of manufacture of product connecting line; Strengthen the anti-drop ability of product, range of application is comparatively extensive.
Accompanying drawing explanation
Fig. 1 is the structural representation of level switch module of the present invention.
Fig. 2 is the structural representation of Multi-serial port Multiplexing module of the present invention.
Fig. 3 is the flow chart of steps of main processing procedure of the present invention.
Fig. 4 is the flow chart of steps of THP terminal handler process of the present invention.
Embodiment
In order to more clearly describe technology contents of the present invention, conduct further description below in conjunction with specific embodiment.
Refer to shown in Fig. 1 to Fig. 2, the Multi-serial port multiplex circuit for GNSS receiver of the present invention comprises level switch module and multi-channel serial port multiplexing module; Described multi-channel serial port multiplexing module comprises the one or two path analoging switch unit, the two or two path analoging switch unit and four path analoging switch unit, the one or two described path analoging switch unit is connected with described level switch module, the two or two path analoging switch unit and four path analoging switch unit respectively, the two or two described path analoging switch unit is connected with the debug serial port of GPS board and the debug serial port of ARM plate respectively, four described path analoging switch unit are connected with the debug serial port in radio station, and described level switch module is connected with host computer; The control end of the described control end of the one or two path analoging switch unit, the control end of the two or two path analoging switch unit and four path analoging switch unit is connected with the multi-channel serial port multiplexing switch of ARM plate respectively.
Refer to shown in Fig. 1, level switch module of the present invention is Transistor-Transistor Logic level and RS232 level switch module.Adopt SLLS657A conversion chip to complete between TTL and RS232 level, level switch module (as Fig. 1) uses port one to complete the level conversion of SRM end Transistor-Transistor Logic level to RS232.
Refer to shown in Fig. 2, the one or two described path analoging switch unit and the two or two described path analoging switch unit are DG2618 chip, the Enable Pin of the one or two described path analoging switch unit
be connected with described ARM plate, the first input end COM1 of the one or two described path analoging switch unit is connected with the first Transistor-Transistor Logic level end BRG_RX of described level switch module, second input end COM2 of the one or two described path analoging switch unit is connected with the second Transistor-Transistor Logic level end BRG_TX of described level switch module, first output terminal NC1 of the one or two described path analoging switch unit is connected with the first input end COM3 of the two or two described path analoging switch unit, second output terminal NC2 of the one or two described path analoging switch unit is connected with the second input end COM4 of the two or two described path analoging switch unit, 3rd output terminal NO1 of the one or two described path analoging switch unit is connected with the second input end 1B of four described path analoging switch unit, 4th output terminal NO2 of the one or two described path analoging switch unit is connected with the 3rd output terminal 3Y of four described path analoging switch unit, first output terminal NC3 of the two or two described path analoging switch unit is connected with the first debug serial port DEBUG_RX of ARM plate, second output terminal NC4 of the two or two described path analoging switch unit is connected with the second debug serial port DEBUG_TX of ARM plate, 3rd output terminal NO3 of the two or two described path analoging switch unit is connected with the first debug serial port GPS_RX1 of GPS board, 4th output terminal NO4 of the two or two described path analoging switch unit is connected with the second debug serial port GPS_TX1 of GPS board.
Four described path analoging switch unit are MC74HC157ADR2G chip, first input end 1A, the 7th input end 4A of four described path analoging switch unit and the 8th input end 4B unsettled, 3rd input end 2A and the 6th input end 3B of four described path analoging switch unit are connected with radio station first debug serial port RSDIO_TXD, and the first output terminal 1Y of four described path analoging switch unit is connected with radio station second debug serial port RSDIO_RXD.
Multiplexer switch circuit is made up of 3 analog switch chips, and DEBUG_RXX, DEBUG_TX are connected to arm processor IMX287 debug serial port; GPS_RX1, GPS_TX1 are connected to the debug serial port of GPS board; RADIO_RXD, RADIO_TXDD are connected to the debug serial port in radio station.Dg2618 is one group of 2 path analoging switch, and when being low level when the level of IN1, NC end is held with COM and is connected; When the level of IN1 is high level, NO end is held with COM and is connected.MC74HC157ADR2G is one group of 4 path analoging switch, and when the level of A/B pin is low, Y port is connected with A port; When the level of A/B pin is high, Y port is connected with B port.DIRECT_GPS, DIRECT_DEBUG_AUART, DIRECT_RADIO are connected to ARM plate multi-channel serial port multiplexing on-off circuit (as Fig. 2);
As DIRECT_GPS=0, DIRECT_DEBUG_AUART=0, DIRECT_RADIO=0, user's serial ports is connected with the debug serial port of I.MX287; As DIRECT_GPS=0, DIRECT_DEBUG_AUART=1, DIRECT_RADIO=0, user's serial ports is connected with the debug serial port of GPS board; As DIRECT_GPS=1, DIRECT_RADIO=0, user's serial ports is connected with the debug serial port in radio station.
Refer to shown in Fig. 3 to Fig. 4, described method comprises main processing procedure and interrupt processing process:
Described main processing procedure comprises the following steps:
(11) touch potential is set and zone bit is zero;
(12) judge whether to open first timer;
(13) if open first timer, then set the first timing, and touch potential is set and zone bit is 0, then continue step (15);
(14), if do not open first timer, then after waiting for first time period, step (12) is continued;
(15) whether the zone bit described in judgement is zero;
(16) if described zone bit is 0, then judge whether acknowledgement key is pressed;
(17), if described acknowledgement key is pressed, then after described touch potential adds 1, step (15) is continued;
(18) if described acknowledgement key is not pressed, then step (15) is continued;
(19) if described zone bit is not 0, then step (14) is continued;
Described interrupt processing process comprises the following steps:
(21) judge whether the first timing terminates;
(22) if the first timing terminates, then setting described zone bit is after 1, and whether the touch potential described in judgement is the first preset value;
(23) if described touch potential is the first preset value, then ARM plate communicates with host computer; Namely, as DIRECT_GPS=0, DIRECT_DEBUG_AUART=0, DIRECT_RADIO=0, user's serial ports is connected with the debug serial port of I.MX287.
(24) if described touch potential is not the first preset value, then judge whether described touch potential is the second preset value;
(25) if described touch potential is the second preset value, then GPS board communicates with host computer; Namely, as DIRECT_GPS=0, DIRECT_DEBUG_AUART=1, DIRECT_RADIO=0, user's serial ports is connected with the debug serial port of GPS board.
(26) if described touch potential is not the second preset value, then judge whether described touch potential is the 3rd preset value;
(27) if described touch potential is the 3rd preset value, then radio station communicates with host computer; Namely, as DIRECT_GPS=1, DIRECT_RADIO=0, user's serial ports is connected with the debug serial port in radio station.
(28) if described touch potential is not the 3rd preset value, then step (13) is continued;
(29) if the first timing does not terminate, then step (15) is continued.
Based on the switching at runtime serial ports treatment scheme of linux, trigger 5s (the first timing) when user presses power key and regularly (open first timer) and poll ok key (button) state, the number of times (i.e. touch potential) that in statistics 5s, ok key is pressed; 5s timing is exceeded the time limit to process function and is carried out switching at runtime user serial ports to different function serial ports according to the number of times of ok button.User only need short press power key just can any switching laws need function serial ports.
In addition, the external user serial ports of I80 receiver only needs a connecting line, and linux environment operates on arm processor I.MX287, provides the driving of button and the control to multi-channel serial port multiplexing circuit.
Have employed the Multi-serial port multiplex circuit for GNSS receiver in this invention and multiplexing method thereof, the multiplexing single external interface realizing multi-channel serial port can be realized by the bridge joint of hardware circuit, the cost of hardware circuit design is more much lower than the cost of design 3 interface connecting lines, reduce structural design difficulty, reduce the cost of manufacture of product connecting line; Strengthen the anti-drop ability of product, range of application is comparatively extensive.
In this description, the present invention is described with reference to its specific embodiment.But, still can make various amendment and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, instructions and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (5)
1. for a Multi-serial port multiplex circuit for GNSS receiver, it is characterized in that, described circuit comprises level switch module and multi-channel serial port multiplexing module; Described multi-channel serial port multiplexing module comprises the one or two path analoging switch unit, the two or two path analoging switch unit and four path analoging switch unit, the one or two described path analoging switch unit is connected with described level switch module, the two or two path analoging switch unit and four path analoging switch unit respectively, the two or two described path analoging switch unit is connected with the debug serial port of GPS board and the debug serial port of ARM plate respectively, four described path analoging switch unit are connected with the debug serial port in radio station, and described level switch module is connected with host computer; The control end of the described control end of the one or two path analoging switch unit, the control end of the two or two path analoging switch unit and four path analoging switch unit is connected with the multi-channel serial port multiplexing switch of ARM plate respectively.
2. the Multi-serial port multiplex circuit for GNSS receiver according to claim 1, is characterized in that, described level switch module is Transistor-Transistor Logic level and RS232 level switch module.
3. the Multi-serial port multiplex circuit for GNSS receiver according to claim 1, is characterized in that, the one or two described path analoging switch unit and the two or two described path analoging switch unit are DG2618 chip; The Enable Pin of the one or two described path analoging switch unit
be connected with described ARM plate, the first input end (COM1) of the one or two described path analoging switch unit is connected with the first Transistor-Transistor Logic level end (BRG_RX) of described level switch module, second input end (COM2) of the one or two described path analoging switch unit is connected with the second Transistor-Transistor Logic level end (BRG_TX) of described level switch module, first output terminal (NC1) of the one or two described path analoging switch unit is connected with the first input end (COM3) of the two or two described path analoging switch unit, second output terminal (NC2) of the one or two described path analoging switch unit is connected with second input end (COM4) of the two or two described path analoging switch unit, 3rd output terminal (NO1) of the one or two described path analoging switch unit is connected with second input end (1B) of four described path analoging switch unit, 4th output terminal (NO2) of the one or two described path analoging switch unit is connected with the 3rd output terminal (3Y) of four described path analoging switch unit, first output terminal (NC3) of the two or two described path analoging switch unit is connected with first debug serial port (DEBUG_RX) of ARM plate, second output terminal (NC4) of the two or two described path analoging switch unit is connected with second debug serial port (DEBUG_TX) of ARM plate, 3rd output terminal (NO3) of the two or two described path analoging switch unit is connected with first debug serial port (GPS_RX1) of GPS board, 4th output terminal (NO4) of the two or two described path analoging switch unit is connected with second debug serial port (GPS_TX1) of GPS board.
4. the Multi-serial port multiplex circuit for GNSS receiver according to claim 3, it is characterized in that, four described path analoging switch unit are MC74HC157ADR2G chip, the first input end (1A) of four described path analoging switch unit, 7th input end (4A) and the 8th input end (4B) unsettled, 3rd input end (2A) and the 6th input end (3B) of four described path analoging switch unit are connected with radio station first debug serial port (RSDIO_TXD), first output terminal (1Y) of four described path analoging switch unit is connected with radio station second debug serial port (RSDIO_RXD).
5. based on the method that circuit realiration GNSS receiver Multi-serial port according to claim 1 is multiplexing, it is characterized in that, described method comprises main processing procedure and interrupt processing process:
Described main processing procedure comprises the following steps:
(11) touch potential is set and zone bit is zero;
(12) judge whether to open first timer;
(13) if open first timer, then set the first timing, and touch potential is set and zone bit is 0, then continue step (15);
(14), if do not open first timer, then after waiting for first time period, step (12) is continued;
(15) whether the zone bit described in judgement is zero;
(16) if described zone bit is 0, then judge whether acknowledgement key is pressed;
(17), if described acknowledgement key is pressed, then after described touch potential adds 1, step (15) is continued;
(18) if described acknowledgement key is not pressed, then step (15) is continued;
(19) if described zone bit is not 0, then step (14) is continued;
Described interrupt processing process comprises the following steps:
(21) judge whether the first timing terminates;
(22) if the first timing terminates, then setting described zone bit is after 1, and whether the touch potential described in judgement is the first preset value;
(23) if described touch potential is the first preset value, then ARM plate communicates with host computer;
(24) if described touch potential is not the first preset value, then judge whether described touch potential is the second preset value;
(25) if described touch potential is the second preset value, then GPS board communicates with host computer;
(26) if described touch potential is not the second preset value, then judge whether described touch potential is the 3rd preset value;
(27) if described touch potential is the 3rd preset value, then radio station communicates with host computer;
(28) if described touch potential is not the 3rd preset value, then step (13) is continued;
(29) if the first timing does not terminate, then step (15) is continued.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510005005.8A CN104462001B (en) | 2015-01-06 | 2015-01-06 | Multi-serial port multiplex circuit and its multiplexing method for GNSS receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510005005.8A CN104462001B (en) | 2015-01-06 | 2015-01-06 | Multi-serial port multiplex circuit and its multiplexing method for GNSS receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104462001A true CN104462001A (en) | 2015-03-25 |
| CN104462001B CN104462001B (en) | 2017-11-10 |
Family
ID=52908078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510005005.8A Active CN104462001B (en) | 2015-01-06 | 2015-01-06 | Multi-serial port multiplex circuit and its multiplexing method for GNSS receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104462001B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746572A (en) * | 2021-08-31 | 2021-12-03 | 深圳市华信天线技术有限公司 | Method for detecting performance of receiving GNSS signals by base station antenna parameter equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080177991A1 (en) * | 2007-01-19 | 2008-07-24 | Novatek Microelectronics Corp. | Method and device for improving debug time of a display apparatus |
| CN101271440A (en) * | 2008-04-14 | 2008-09-24 | 杭州华三通信技术有限公司 | Multi-serial port implementing method and apparatus |
| CN102662893A (en) * | 2012-03-22 | 2012-09-12 | 中国科学院长春光学精密机械与物理研究所 | Multifunctional bus data conversion system |
-
2015
- 2015-01-06 CN CN201510005005.8A patent/CN104462001B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080177991A1 (en) * | 2007-01-19 | 2008-07-24 | Novatek Microelectronics Corp. | Method and device for improving debug time of a display apparatus |
| CN101271440A (en) * | 2008-04-14 | 2008-09-24 | 杭州华三通信技术有限公司 | Multi-serial port implementing method and apparatus |
| CN102662893A (en) * | 2012-03-22 | 2012-09-12 | 中国科学院长春光学精密机械与物理研究所 | Multifunctional bus data conversion system |
Non-Patent Citations (1)
| Title |
|---|
| 杨林楠等: "《基于FPGA的高速多路数据采集系统的设计》", 《计算机工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746572A (en) * | 2021-08-31 | 2021-12-03 | 深圳市华信天线技术有限公司 | Method for detecting performance of receiving GNSS signals by base station antenna parameter equipment |
| CN113746572B (en) * | 2021-08-31 | 2023-12-05 | 深圳市华信天线技术有限公司 | Method for detecting GNSS signal receiving performance of base station antenna industrial parameter equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104462001B (en) | 2017-11-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107748509B (en) | ASI communication slave machine implementation method based on single chip microcomputer transceiving control | |
| CN103729319A (en) | Equipment system based on serial bus and data transmission method | |
| CN204557186U (en) | A kind of control circuit of vacuum component | |
| CN103180797A (en) | Server system and external-card expansion device thereof | |
| CN203608227U (en) | Bidirectional buffering 1553B/CAN bus protocol converter | |
| KR20060131489A (en) | Device and method for performing multi- functions using unique port in wireless terminal | |
| CN205644116U (en) | KVM switches module for industrial control | |
| CN105703935A (en) | Server system with function of automatic switching of shared network | |
| CN202153350U (en) | Video signal switch device for loongson mainboard | |
| CN104462001A (en) | Multi-serial port multiplexing circuit for GNSS receiver and multiplexing method thereof | |
| CN112306935A (en) | Method and device for following USB (universal serial bus) equipment in conference tablet | |
| CN203299372U (en) | Radio monitoring direction finding movement device | |
| KR20150103905A (en) | Method and apparatus for switching between master MCU(micro controller unit) and slave MCU of dual MCU | |
| CN110750475A (en) | Method and device for sharing one physical serial port by multiple CPUs, embedded equipment and medium | |
| WO2022188658A1 (en) | Method and circuit for multiplexing usb interface, and electronic device and storage medium | |
| RU175051U1 (en) | Processor module | |
| US20140347279A1 (en) | Keyboard device with switchable connection path and its switching method | |
| CN201378316Y (en) | Universal input/output interface extension circuit and mobile terminal with same | |
| CN202257560U (en) | Novel universal serial bus (USB) switcher equipment | |
| CN111638804A (en) | Wireless keyboard mouse device capable of switching and controlling multiple computers | |
| CN101923531B (en) | Interface card with extensible output/input interface | |
| CN204576495U (en) | A kind of dual bus arbitration control device | |
| CN103631750A (en) | Information processing method and electronic equipment | |
| CN209657105U (en) | A kind of portable general interface debugging device based on Ethernet | |
| CN109739695B (en) | ARM and FPGA dissimilar redundancy communication method in unmanned aerial vehicle controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 201702 Shanghai city Qingpu District Xujing town Gaojing Road No. 599 China Beidou Industrial Park C Building 2 floor Applicant after: Shanghai Hua Ce airmanship limited company Address before: 201702 Shanghai city Qingpu District Xujing town Gaojing Road No. 599 China Beidou Industrial Park C Building 2 floor Applicant before: CHC Technology Co., Ltd. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: SHANGHAI HUACE NAVIGATION TECHNOLOGY CO., LTD. TO: CHC TECHNOLOGY CO., LTD. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |