CN110716474A - Voice development kit and simulator circuit thereof - Google Patents
Voice development kit and simulator circuit thereof Download PDFInfo
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- CN110716474A CN110716474A CN201911082353.XA CN201911082353A CN110716474A CN 110716474 A CN110716474 A CN 110716474A CN 201911082353 A CN201911082353 A CN 201911082353A CN 110716474 A CN110716474 A CN 110716474A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
Abstract
The application discloses pronunciation development external member and simulator circuit thereof, the simulator circuit in this pronunciation development external member includes: the interface conversion chip is connected with the voice module in the voice development kit and used for carrying out simulation verification and operation debugging on the voice module by calling a preset configuration program; the protection circuit is connected between the interface conversion chip and the USB interface and is used for performing electrostatic protection on the USB interface; the configuration circuit is connected with the interface conversion chip and is used for storing a preset configuration program; and a power supply circuit for supplying power. The voice module simulation test system can realize simulation verification and operation debugging of the voice module, is simple in structure and low in cost, and effectively improves signal transmission accuracy and anti-interference capability by utilizing the protection circuit arranged between the USB2.0 interface and the interface conversion chip, greatly facilitates development verification of the voice module by a user, and shortens product development period.
Description
Technical Field
The present application relates to the field of speech technology, and in particular, to a speech development kit and an emulator circuit thereof.
Background
With the development of technologies such as the internet of things, the application of the voice module in various intelligent prototypes is more and more extensive. In order to develop the voice module conveniently, a set of development kit which can be used after opening the box is necessary, and by means of a simulator circuit in the development kit, software and hardware functions can be verified more conveniently, the research and development period is shortened, and the product is convenient to rapidly push to the market.
Disclosure of Invention
The application aims to provide a low-cost voice development kit and a simulator circuit thereof, so that a user can conveniently develop and verify a voice module, and the product development period is shortened.
To solve the above technical problem, in a first aspect, the present application discloses an emulator circuit in a speech development kit, comprising:
the interface conversion chip is connected with the voice module in the voice development kit and used for carrying out simulation verification and operation debugging on the voice module by calling a preset configuration program;
the protection circuit is connected between the interface conversion chip and the USB interface and is used for performing electrostatic protection on the USB interface;
the configuration circuit is connected with the interface conversion chip and is used for storing the preset configuration program;
a power supply circuit for supplying power.
Optionally, the interface conversion chip is compatible with a high-speed mode and a full-speed mode of the USB2.0 interface standard.
Optionally, the configuration circuit comprises a memory and three pull-up resistors;
the enabling end, the clock end and the data output end of the memory are respectively connected with the output end of the power circuit through a pull-up resistor; the enabling end of the memory is connected with the enabling output end of the interface conversion chip; the clock end of the memory is connected with the clock output end of the interface conversion chip; and the data input end and the data output end of the memory are respectively connected with the data end of the interface conversion chip.
Optionally, the configuration circuit further comprises: and the output resistor is connected between the data output end of the memory and the interface conversion chip.
Optionally, the configuration circuit further comprises: and the voltage stabilizing capacitor is connected between the power supply end of the memory and the ground wire.
Optionally, the power circuit includes a first ground capacitor, a second ground capacitor, a third ground capacitor, and a voltage stabilizing chip;
the power supply input end of the voltage stabilizing chip is connected with an external power supply and the first grounding capacitor; and the power output end of the voltage stabilizing chip is respectively connected with the second grounding capacitor and the third grounding capacitor.
Optionally, the capacitance values of the first grounded capacitor and the third grounded capacitor are both 100 nF; and the capacitance value of the second grounding capacitor is 10 mu F.
Optionally, the method further comprises: and the pull-up resistor is connected between the reset end of the interface conversion chip and the output end of the power circuit.
Optionally, the method further comprises: and the pull-down resistor is connected between the feedback end of the interface conversion chip and the ground wire.
In a second aspect, the present application also discloses a speech development kit comprising any of the emulator circuits described above.
The simulator circuit in the voice development kit that this application provided includes: the interface conversion chip is connected with the voice module in the voice development kit and used for simulating or debugging the voice module by calling a preset configuration program; the protection circuit is connected between the interface conversion chip and the USB interface and is used for performing electrostatic protection on the USB interface; the configuration circuit is connected with the interface conversion chip and is used for storing the preset configuration program; and a power supply circuit for supplying power.
Therefore, the simulator circuit of the voice development kit provided by the application configures the interface conversion chip based on the configuration circuit, performs interface conversion processing on signals by the interface conversion chip, can convert USB interface signals into UART (universal asynchronous receiver/transmitter) interface signals and JTAG (joint test action group) interface signals and output the UART interface signals and the JTAG interface signals to a voice module connected behind, and realizes simulation verification and operation debugging of the voice module. Meanwhile, the USB2.0 interface and the interface conversion chip are simple in structure and low in cost, and the protection circuit arranged between the USB2.0 interface and the interface conversion chip is utilized, so that the signal transmission accuracy is effectively improved, the anti-interference capability is improved, great convenience is brought to the development and verification of a user on a voice module, and the product development period is shortened. The voice development kit provided by the application also has the beneficial effects.
Drawings
In order to more clearly illustrate the technical solutions in the prior art and the embodiments of the present application, the drawings that are needed to be used in the description of the prior art and the embodiments of the present application will be briefly described below. Of course, the following description of the drawings related to the embodiments of the present application is only a part of the embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the provided drawings without any creative effort, and the obtained other drawings also belong to the protection scope of the present application.
FIG. 1 is a block diagram of an emulator circuit in a speech development kit according to an embodiment of the present disclosure;
fig. 2 is a circuit connection diagram of an emulator circuit in a speech development kit according to an embodiment of the present application.
Detailed Description
The core of the application lies in providing a low-cost voice development kit and a simulator circuit thereof, so as to facilitate the development and verification of a voice module by a user and shorten the product development period.
In order to more clearly and completely describe the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
At present, with the development of technologies such as the internet of things, the application of the voice module in various intelligent prototypes is more and more extensive. In order to develop the voice module conveniently, a set of development kit which can be used after opening the box is necessary, and by means of a simulator circuit in the development kit, software and hardware functions can be verified more conveniently, the research and development period is shortened, and the product is convenient to rapidly push to the market.
Referring to fig. 1, an embodiment of the present application discloses an emulator circuit in a speech development kit, which mainly includes:
the interface conversion chip 101 is connected with a voice module in the voice development kit and used for carrying out simulation verification and operation debugging on the voice module by calling a preset configuration program;
the protection circuit 102 is connected between the interface conversion chip 101 and the USB interface and is used for performing electrostatic protection on the USB interface;
the configuration circuit 103 is connected with the interface conversion chip 101 and is used for storing a preset configuration program;
a power supply circuit 104 for supplying power.
Specifically, the simulator is a development tool for performing software and hardware debugging in the development stage of electronic products instead of a singlechip chip in the products. The simulator is matched with an integrated development environment to perform single-step trace debugging on the embedded program, and debugging means such as breakpoints, full speed and the like can also be used, and the real-time data of various variables, RAM and registers can be observed to trace the execution condition of the program; meanwhile, the hardware circuit can be debugged in real time. The simulator can be used for quickly finding and eliminating logic errors in the program, and the development period of the single chip microcomputer is greatly shortened.
In the emulator circuit provided in the embodiment of the present application, the interface conversion chip 101 serves as a main chip, and can perform data conversion between different interface formats, so as to perform communication transmission with a voice module in a voice development kit, thereby implementing function simulation verification and fault debugging operation on the voice module. The interface conversion chip 101 may specifically implement conversion between a USB interface format and a UART interface format (i.e., a serial port) or an FIFO interface format (i.e., a parallel port), and has the capability of being configured in a plurality of industry standard serial or parallel interfaces. Wherein, the interface conversion chip 101 can be used to convert two functional interfaces: one is JTAG/SWD interface for simulation verification of the connected voice module; the other is a UART interface used for carrying out operation debugging on a voice module connected behind.
Preferably, the interface conversion chip 101 is specifically compatible with the high-speed mode and the full-speed mode of the USB2.0 interface standard. Specifically, in the high-speed mode of the USB2.0 interface standard, the data transmission rate is usually between 25Mb/s and 400Mb/s, and the maximum rate can be 480 Mb/s; in the full-speed mode, the data transmission rate is typically between 500Kb/s and 10Mb/s, and the maximum rate may be 12 Mb/s.
As a specific example, FT2232H may be used as an interface conversion chip 101. Its USB to parallel FIFO data transfer rate is up to 10 megabytes per second. FT2232H has two multiprotocol synchronous serial engines (MPSSE) that allow simultaneous communication using both JTAG, I2C, and SPI channels. Referring to fig. 2 in particular, fig. 2 is a circuit connection diagram of an emulator circuit disclosed in an embodiment of the present application.
In this embodiment, a control command is input through a USB2.0 interface, and the FT2232H realizes simulation verification and operation debugging of a subsequent voice module by calling a preset configuration program under the action of the control command. In order to improve data accuracy and reduce electrostatic interference when the FT2232H converts a signal of the USB2.0 interface, the embodiment of the present application further provides the protection circuit 102: the data output end (D-, D +) of the USB interface is connected to the input end of the protection circuit 102, and the output end of the protection circuit 102 is connected to the USB data signal end (DM, DP) of the interface conversion chip 101.
The protection circuit 102 may be USBLC 6-2. The USBLC6-2 is a low-capacitance ESD (Electro-Static Discharge) protection integrated chip, can be used for protecting two data lines and power lines of a USB2.0 high-speed interface, and has an anti-electrostatic Discharge protection voltage reaching IEC61000-4-2 class 4 15kV standard and a maximum leakage current of only 1 uA.
The protection circuit 102 realized based on the USBLC6-2 in the application can make the D + and D-signals in the USB2.0 interface completely balanced, and the matching tolerance of the I/O interface of the USBLC6-2 to the ground wire is only 0.04pF and is completely within the tolerance range of USB2.0 with maximum 1 pF. The VBUS ESD protection function of USBLC6-2 draws current to ground when an ESD event occurs on the data line.
As a specific example, the configuration circuit 103 may include a memory and three pull-up resistors; the enable terminal, the clock terminal and the data output terminal of the memory are respectively connected with the output terminal of the power circuit 104 through a pull-up resistor; the enable end of the memory is connected with the enable output end of the interface conversion chip 101; the clock end of the memory is connected with the clock output end of the interface conversion chip 101; the data input end and the data output end of the memory are respectively connected with the data end of the interface conversion chip 101.
Wherein, the memory can be 93LC 46B. In fig. 2, the enable terminal of 93LC46B is CS pin, the clock terminal is CLK pin, the data output terminal is DO pin, and the data input terminal is DI pin. The enable output of FT2232H is the EECS pin, the clock output is the EECLK pin, and the data output is the EEDATA pin. The operating voltage output by the output terminal of the power circuit 104 is VEM. The resistors R3, R4, and R5 are pull-up resistors, and may be 10k Ω.
The memory stores preset configuration programs for performing simulation operation and debugging on the voice suite. It is easy to understand that, in order to effectively improve the compatibility of the voice suite, the memory of the present application stores the corresponding preset configuration programs in a plurality of different operating modes and the corresponding preset configuration programs in different hardware configurations, so as to verify each operating mode of the voice suite in various configurations.
Further, on the basis of the above, the configuration circuit 103 further includes an output resistor connected between the data output terminal of the memory and the interface conversion chip 101. In fig. 2, the resistor R6 is an output resistor, specifically 2.2k Ω.
Further, on the basis of the above, the configuration circuit 103 further includes a voltage stabilizing capacitor connected between the power terminal VCC pin of the memory and the ground. In fig. 2, the capacitor C16 is a voltage stabilizing capacitor, specifically 100 nF.
After FT2232H performs signal processing by calling a preset configuration program, its data output bus outputs an emulation signal converted into JTAG interface standard and a debug signal converted into UART interface standard. The other ends of the data output buses for outputting the simulation signals and the debugging signals are respectively connected with corresponding pins of the voice module in the voice development condition. Specifically, in fig. 2, the data out line of FT2232H includes 32 lines of 4 ports: ADBUS 0-ADBUS 7, ACBUS 0-ACBUS 7, BDBUS 0-BDBUS 7, and BCBUS 0-BCBUS 7. As to which data output lines output different signals, FT2232H may be configured based on a preset configuration program.
As a specific example, the power circuit 104 may include a first grounded capacitor, a second grounded capacitor, a third grounded capacitor, and a voltage stabilization chip; the power supply input end of the voltage stabilizing chip is connected with an external power supply and a first grounding capacitor; and the power output end of the voltage stabilizing chip is respectively connected with the second grounding capacitor and the third grounding capacitor.
Wherein, LM1117 can be selected for the voltage stabilization chip specifically, realizes the voltage conversion from 5V to 3.3V. LM1117 is a low-voltage drop three-terminal linear voltage-stabilized source with positive voltage output, the maximum current can reach 1A, and overheating and current-limiting protection are integrated inside the linear voltage-stabilized source. In fig. 2, VBUS is a 5V voltage provided by the external power source, and VEM is a 3.3V working voltage output by the power circuit 104. C1 is a first grounded capacitor, specifically 100 nF; c2 is a second grounding capacitor, specifically 10 μ F; c3 is a third grounded capacitor, specifically 100 nF.
Further, on the basis of the above, the emulator circuit further includes a pull-up resistor connected between the reset terminal of the interface conversion chip 101 and the output terminal of the power circuit 104, and a pull-down resistor connected between the feedback terminal of the interface conversion chip 101 and the ground. In fig. 2, the RESET pin of FT2232H is the RESET terminal, active low; the resistor R1 is a pull-up resistor, which can be 1k omega; the REF pin of FT2232H is the feedback terminal, and the high level is effective; the resistor R2 is a pull-down resistor, and may be specifically 12k Ω.
Furthermore, it should be noted that the above is only an exemplary illustration of the main component circuit in the present application, and in practical application, the above emulator circuit may also include other common circuit arrangements.
For example, as shown in FIG. 2, each of the ground GND pin and the TEST TEST pin of FT2232H are grounded; each VCORE pin of FT2232H is connected to a ground capacitance C4(100nF), C9(100nF), C10(100nF), C11(100 nF); the VPHY pin of FT2232H is connected to the output of power supply circuit 104 via inductor B1 and to ground capacitors C5(4.7 μ F), C6(100 nF); the VPLL pin of FT2232H is connected to the output of power supply circuit 104 via inductor B2 and to ground capacitors C7(4.7 μ F), C8(100 nF); the crystal oscillator is connected between the OSCI pin and the OSCO pin of the FT2232H, the OSCI pin is simultaneously connected with a grounding capacitor C17(10pF), and the OSCO pin is simultaneously connected with a grounding capacitor C18(10 pF).
The simulator circuit in the voice development kit provided by the embodiment of the application comprises: the interface conversion chip 101 is connected with a voice module in the voice development kit and used for simulating or debugging the voice module by calling a preset configuration program; the protection circuit 102 is connected between the interface conversion chip 101 and the USB interface and is used for performing electrostatic protection on the USB interface; the configuration circuit 103 is connected with the interface conversion chip 101 and is used for storing a preset configuration program; a power supply circuit 104 for supplying power.
Therefore, the emulator circuit of the voice development kit provided by the embodiment of the application configures the interface conversion chip based on the configuration circuit, performs interface conversion processing on signals by the interface conversion chip, can convert USB interface signals into UART interface and JTAG interface signals, and outputs the UART interface and JTAG interface signals to a voice module connected in the rear, thereby realizing simulation verification and operation debugging of the voice module. Meanwhile, the USB2.0 interface and the interface conversion chip are simple in structure and low in cost, and the protection circuit arranged between the USB2.0 interface and the interface conversion chip is utilized, so that the signal transmission accuracy is effectively improved, the anti-interference capability is improved, great convenience is brought to the development and verification of a user on a voice module, and the product development period is shortened.
The application also discloses a voice development kit comprising any of the simulator circuits described above.
For the details of the above-mentioned voice development kit, reference may be made to the above-mentioned detailed description of the emulator circuit in the voice development kit, and details thereof are not repeated here.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the equipment disclosed by the embodiment, the description is relatively simple because the equipment corresponds to the method disclosed by the embodiment, and the relevant parts can be referred to the method part for description.
It is further noted that, throughout this document, relational terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The technical solutions provided by the present application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall into the protection scope of the present application.
Claims (10)
1. An emulator circuit in a speech development kit, comprising:
the interface conversion chip is connected with the voice module in the voice development kit and used for carrying out simulation verification and operation debugging on the voice module by calling a preset configuration program;
the protection circuit is connected between the interface conversion chip and the USB interface and is used for performing electrostatic protection on the USB interface;
the configuration circuit is connected with the interface conversion chip and is used for storing the preset configuration program;
a power supply circuit for supplying power.
2. The emulator circuit of claim 1, wherein the interface conversion chip is compatible with a high-speed mode and a full-speed mode of a USB2.0 interface standard.
3. The emulator circuit of claim 1, wherein the configuration circuit comprises a memory and three pull-up resistors;
the enabling end, the clock end and the data output end of the memory are respectively connected with the output end of the power circuit through a pull-up resistor; the enabling end of the memory is connected with the enabling output end of the interface conversion chip; the clock end of the memory is connected with the clock output end of the interface conversion chip; and the data input end and the data output end of the memory are respectively connected with the data end of the interface conversion chip.
4. The emulator circuit of claim 3, wherein the configuration circuit further comprises:
and the output resistor is connected between the data output end of the memory and the interface conversion chip.
5. The emulator circuit of claim 3, wherein the configuration circuit further comprises:
and the voltage stabilizing capacitor is connected between the power supply end of the memory and the ground wire.
6. The emulator circuit of claim 1, wherein the power circuit comprises a first ground capacitor, a second ground capacitor, a third ground capacitor, and a voltage stabilization chip;
the power supply input end of the voltage stabilizing chip is connected with an external power supply and the first grounding capacitor; and the power output end of the voltage stabilizing chip is respectively connected with the second grounding capacitor and the third grounding capacitor.
7. The emulator circuit of claim 6, wherein the first and third ground capacitors each have a capacitance value of 100 nF; and the capacitance value of the second grounding capacitor is 10 mu F.
8. The emulator circuit of any one of claims 1 to 7, further comprising:
and the pull-up resistor is connected between the reset end of the interface conversion chip and the output end of the power circuit.
9. The emulator circuit of claim 8, further comprising:
and the pull-down resistor is connected between the feedback end of the interface conversion chip and the ground wire.
10. A speech development kit comprising an emulator circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911082353.XA CN110716474A (en) | 2019-11-07 | 2019-11-07 | Voice development kit and simulator circuit thereof |
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| CN201911082353.XA CN110716474A (en) | 2019-11-07 | 2019-11-07 | Voice development kit and simulator circuit thereof |
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| CN110716474A true CN110716474A (en) | 2020-01-21 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200849049A (en) * | 2007-06-14 | 2008-12-16 | Elan Microelectronics Corp | Speech IC simulation method, system and storage medium thereof |
| CN102819232A (en) * | 2012-07-12 | 2012-12-12 | 中国人民解放军空军第一航空学院 | Portable monitoring and debugging system of flight control computer |
| CN202995708U (en) * | 2012-11-20 | 2013-06-12 | 中国人民解放军国防科学技术大学 | Emulator with emulated data displaying and emulated data storing function |
| CN203951178U (en) * | 2014-07-02 | 2014-11-19 | 乐星产电(无锡)有限公司 | There is the touch-screen of the USB port technology of ESD safeguard function |
| CN104486011A (en) * | 2014-12-11 | 2015-04-01 | 中国地质大学（武汉） | Monitoring device for multiple wireless channels based on FPGA |
| CN110035198A (en) * | 2019-04-06 | 2019-07-19 | 东莞市金翔光电科技有限公司 | The double USB transmission systems of flat bed scanner |
| CN110299949A (en) * | 2018-03-23 | 2019-10-01 | 广州市车厘子电子科技有限公司 | A kind of vehicle-mounted tuning system and USB data transmission codan |
-
2019
- 2019-11-07 CN CN201911082353.XA patent/CN110716474A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200849049A (en) * | 2007-06-14 | 2008-12-16 | Elan Microelectronics Corp | Speech IC simulation method, system and storage medium thereof |
| CN102819232A (en) * | 2012-07-12 | 2012-12-12 | 中国人民解放军空军第一航空学院 | Portable monitoring and debugging system of flight control computer |
| CN202995708U (en) * | 2012-11-20 | 2013-06-12 | 中国人民解放军国防科学技术大学 | Emulator with emulated data displaying and emulated data storing function |
| CN203951178U (en) * | 2014-07-02 | 2014-11-19 | 乐星产电(无锡)有限公司 | There is the touch-screen of the USB port technology of ESD safeguard function |
| CN104486011A (en) * | 2014-12-11 | 2015-04-01 | 中国地质大学（武汉） | Monitoring device for multiple wireless channels based on FPGA |
| CN110299949A (en) * | 2018-03-23 | 2019-10-01 | 广州市车厘子电子科技有限公司 | A kind of vehicle-mounted tuning system and USB data transmission codan |
| CN110035198A (en) * | 2019-04-06 | 2019-07-19 | 东莞市金翔光电科技有限公司 | The double USB transmission systems of flat bed scanner |
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