CN207369280U - A kind of vehicle-mounted radio UART upgrades circuit - Google Patents
A kind of vehicle-mounted radio UART upgrades circuit Download PDFInfo
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- CN207369280U CN207369280U CN201720883398.7U CN201720883398U CN207369280U CN 207369280 U CN207369280 U CN 207369280U CN 201720883398 U CN201720883398 U CN 201720883398U CN 207369280 U CN207369280 U CN 207369280U
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Abstract
It the utility model is related to radio field, disclose a kind of vehicle-mounted radio UART upgradings circuit, when the AUX audio interface is used as UART upgradings, the L signal of the AUX audio interface is connected internally to the UART_RX of MCU in radio, is connected externally to the UART_TX of debugging board；The R signal of the AUX audio interface is connected internally to the startup configuration pin of MCU in radio, is connected externally to the DC voltage 12V of debugging board；The GND signals of the AUX audio interface are connected internally to signal ground in radio, are connected externally to the ground of audio input；The MIC signals of the AUX audio interface are connected internally to the UART_TX of MCU in radio, are connected externally to the UART_RX of debugging board.The technical solution can realize the upgrading to UART by AUX audio interface.
Description
Technical field
Radio field is the utility model is related to, more particularly to a kind of vehicle-mounted radio UART upgradings circuit.
Background technology
In current Vehicular radio system, it is upgraded generally by USB interface or SD card interface, in USB flash disk
Or dedicated upgrade procedure is put into SD card, after allowing vehicle-mounted radio to enter engineering mode by backstage instruction, pass through USB and SD
Card upgraded, but for part do not have USB and the vehicle-mounted radio of SD card function, if necessary to upgrading, then have to by
It is pulled down, it could be upgraded by dedicated upgrading tool by internal debugging mouth, inside vehicle-mounted radio
The method of debugging mouth upgrading, implementation process is cumbersome, and upgrading efficiency is low, for contrasting vehicle-mounted radio, substantially can not
Implement.
Utility model content
Given this problem, the purpose of the utility model embodiment are that providing a kind of vehicle-mounted radio UART upgrades circuit,
The upgrading to UART can be realized by AUX audio interface.
A kind of vehicle-mounted radio UART upgrading circuits that the utility model embodiment provides, the AUX audio interface are used as
When UART upgrades, the L signal of the AUX audio interface is connected internally to the UART_RX of MCU in radio, is connected externally to
The UART_TX of debugging board；The R signal of the AUX audio interface is connected internally to the startup configuration pin of MCU in radio,
It is connected externally to the DC voltage 12V of debugging board；The GND signals of the AUX audio interface are connected internally to signal in radio
Ground, is connected externally to the ground of audio input；The MIC signals of the AUX audio interface are connected internally to MCU's in radio
UART_TX, is connected externally to the UART_RX of debugging board.
Alternatively, when the AUX audio interface is used as audio, the L signal of the AUX audio interface connects inside radio
The input of ADC is connected to, in external connection audio input；The R signal of the AUX audio interface is connected internally to ADC in radio
Input, in external connection audio input；The GND signals of the AUX audio interface are connected internally to signal ground in radio,
It is connected externally to the ground of audio input；The MIC signals of the AUX audio interface are connected internally to the TX of MCU in radio, outside
Portion is connected to the ground of audio input.
Alternatively, the pull down resistor R1 of the L signal connection termination of the AUX audio interface, ADC is connected to by capacitance C2
L input terminals, while be connected to the RX pins of MCU by D1 and pull-up resistor R3, circuit is connected to the RX pins of MCU, is used for
Upgrade signal outside receiving；
The pull down resistor R2 of the R signal connection termination of the AUX audio interface, the R that ADC is connected to by capacitance C1 are inputted
End, while the electronic switching circuit by being made of D2/Q1/R4 is connected to the startup configuration pin of MCU, for changing MCU's
Operating mode, the MIC signals of the AUX audio interface are directly connected to the TX pins of MCU, for exporting the relevant information of MCU.
Therefore in the case of vehicle-mounted radio does not have USB or SD interface, using the present embodiment technical solution, by
In realizing UART upgrade problems by increasing extra upgrading circuit in AUX audio interface, machine is not being torn open so as to ensure that
In the case of, vehicle-mounted radio is upgraded by AUX audio interface.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
Put, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 upgrades circuit total figure for a kind of vehicle-mounted radio UART provided by the utility model；
Fig. 2 is circuit diagram when a kind of AUX audio interface provided by the utility model is used as audio；
Fig. 3 is used as UART for a kind of AUX audio interface provided by the utility model and upgrades circuit diagram；
Fig. 4 is a kind of debugging board circuit diagram provided by the utility model.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without creative efforts
All other embodiments obtained, shall fall within the protection scope of the present invention.
Embodiment：
The present embodiment provides a kind of vehicle-mounted radio UART upgrade circuit, primarily directed to vehicle-mounted radio do not have USB or
The situation of SD interface, realizes UART upgrade problems, so as to ensure by increasing extra upgrading circuit in AUX audio interface
In the case where not tearing machine open, vehicle-mounted radio is upgraded by AUX audio interface.
The AUX audio interface is used as circuit during audio, and as illustrated in fig. 1 and 2, the L signal of the AUX audio interface exists
Radio is connected internally to the input of ADC, in external connection audio input；The R signal of the AUX audio interface is in radio
Portion is connected to the input of ADC, in external connection audio input；The GND signals of the AUX audio interface connect inside radio
To signal ground, the ground of audio input is connected externally to；The MIC signals of the AUX audio interface are connected internally in radio
The TX of MCU, is connected externally to the ground of audio input.
The AUX audio interface is used as circuit when UART upgrades, as shown in figs. 1 and 3, the L letters of the AUX audio interface
The UART_RX of MCU number is connected internally in radio, is connected externally to the UART_TX of debugging board, the debugging board can be real
The conversion of existing usb signal and UART signal；The startup that the R signal of the AUX audio interface is connected internally to MCU in radio is matched somebody with somebody
Pin is put, is connected externally to the DC voltage 12V of debugging board；The GND signals of the AUX audio interface connect inside radio
Signal ground is connected to, is connected externally to the ground of audio input；The MIC signals of the AUX audio interface connect inside radio
To the UART_TX of MCU, the UART_RX of debugging board is connected externally to.
As shown in figure 4, the pull down resistor R1 of the L signal connection termination of the AUX audio interface, is connected to by capacitance C2
The L input terminals of ADC, while pass through the RX pins that D1 and pull-up resistor R3 is connected to MCU, circuit is connected to the RX pins of MCU, uses
To receive the upgrade signal of outside.The pull down resistor R2 of the R signal connection termination of the AUX audio interface, connects by capacitance C1
The R input of ADC is connected to, while the electronic switching circuit by being made of D2/Q1/R4 is connected to the startup configuration pin of MCU,
For changing the operating mode of MCU, the MIC signals of the AUX audio interface are directly connected to the TX pins of MCU, for exporting MCU
Relevant information, escalation process is as follows：
External signal DC voltage 12V is accessed by the R passages of the AUX audio interface, by being made of D2/Q1/R4
Electronic switching circuit change MCU and start configuration pin, at this time by switch to being powered on again after MCU power down, MCU after the power is turned on, MCU
Detection starts the state of configuration pin, and according to setting at this time, startup source is configured to UART startups, then according to the special of outside
Upgrading software proceeds by upgrading, and the L * channel of audio interface can transmit data and pass through the RX pins that D1 is given to MCU, MCU during upgrading
TX pins can will upgrade MIC signal pins of the transmission of feedback information to audio interface, be transferred to outside the debugging board.
As it can be seen that upgrading when, due to the AUX audio interface R signal radio be connected internally to MCU startup configuration
Pin, is connected externally to the DC voltage 12V of debugging board, can switch institute by on-off circuit to being powered on again after MCU power down
Circuit when stating AUX audio interface from as audio changes the startup configuration pin of MCU to circuit when upgrading as UART
State, after specific MCU starts, MCU detections start the state of configuration pin, and according to setting at this time, startup source is configured to
UART starts, and then proceeds by upgrading according to exterior special upgrade software, until upgrading terminates.This designing scheme effectively solves
Certainly upgrading problem of the vehicle-mounted radio under no USB/SD interface cases, is realized by AUX audio interface to vehicle-mounted radio level
Upgrading.
Embodiments described above, does not form the restriction to the technical solution protection domain.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements made within the spirit and principle of mode etc., should be included in the protection model of the technical solution
Within enclosing.
Claims (3)
1. a kind of vehicle-mounted radio UART upgrades circuit, it is characterised in that：When AUX audio interface is used as UART upgradings, the AUX
The L signal of audio interface is connected internally to the UART_RX of MCU in radio, is connected externally to the UART_TX of debugging board；Institute
The R signal for stating AUX audio interface is connected internally to the startup configuration pin of MCU in radio, is connected externally to debugging board
DC voltage 12V；The GND signals of the AUX audio interface are connected internally to signal ground in radio, are connected externally to audio
The ground of input；The MIC signals of the AUX audio interface are connected internally to the UART_TX of MCU in radio, are connected externally to
The UART_RX of debugging board.
A kind of 2. vehicle-mounted radio UART upgradings circuit as claimed in claim 1, it is characterised in that：The AUX audio interface
During as audio, the L signal of the AUX audio interface is connected internally to the input of ADC in radio, defeated in external connection audio
Enter；The R signal of the AUX audio interface is connected internally to the input of ADC in radio, in external connection audio input；It is described
The GND signals of AUX audio interface are connected internally to signal ground in radio, are connected externally to the ground of audio input；The AUX
The MIC signals of audio interface are connected internally to the TX of MCU in radio, are connected externally to the ground of audio input.
A kind of 3. vehicle-mounted radio UART upgradings circuit as claimed in claim 1 or 2, it is characterised in that：
The pull down resistor R1 of the L signal connection termination of the AUX audio interface, the L input terminals of ADC are connected to by capacitance C2,
The RX pins of MCU are connected to by D1 and pull-up resistor R3 at the same time, circuit is connected to the RX pins of MCU, for receiving outside
Upgrade signal；
The pull down resistor R2 of the R signal connection termination of the AUX audio interface, the R input of ADC is connected to by capacitance C1,
The startup configuration pin of MCU is connected to by the electronic switching circuit being made of D2/Q1/R4 at the same time, for changing the work of MCU
Pattern, the MIC signals of the AUX audio interface are directly connected to the TX pins of MCU, for exporting the relevant information of MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720883398.7U CN207369280U (en) | 2017-07-20 | 2017-07-20 | A kind of vehicle-mounted radio UART upgrades circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720883398.7U CN207369280U (en) | 2017-07-20 | 2017-07-20 | A kind of vehicle-mounted radio UART upgrades circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207369280U true CN207369280U (en) | 2018-05-15 |
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ID=62421697
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720883398.7U Active CN207369280U (en) | 2017-07-20 | 2017-07-20 | A kind of vehicle-mounted radio UART upgrades circuit |
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| CN (1) | CN207369280U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111090605A (en) * | 2019-10-10 | 2020-05-01 | 惠州市德赛西威汽车电子股份有限公司 | USB-UART (universal serial bus-to-universal asynchronous receiver transmitter) circuit for MCU (microprogrammed control unit) software upgrading |
| CN112367602A (en) * | 2020-11-06 | 2021-02-12 | 歌尔科技有限公司 | Bluetooth headset testing method, system, testing terminal and computer readable storage medium |
-
2017
- 2017-07-20 CN CN201720883398.7U patent/CN207369280U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111090605A (en) * | 2019-10-10 | 2020-05-01 | 惠州市德赛西威汽车电子股份有限公司 | USB-UART (universal serial bus-to-universal asynchronous receiver transmitter) circuit for MCU (microprogrammed control unit) software upgrading |
| CN112367602A (en) * | 2020-11-06 | 2021-02-12 | 歌尔科技有限公司 | Bluetooth headset testing method, system, testing terminal and computer readable storage medium |
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