CN215006627U

CN215006627U - Serial port downloading circuit

Info

Publication number: CN215006627U
Application number: CN202121407427.5U
Authority: CN
Inventors: 张凯华; 吴紫凤
Original assignee: Guangdong Seneasy Intelligent Technology Co ltd
Current assignee: Guangdong Seneasy Intelligent Technology Co ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2021-12-03
Anticipated expiration: 2031-06-24

Abstract

The utility model discloses a serial port downloading circuit, including USB module, USB commentaries on classics serial port module, logic conversion module, serial port downloading module, power module, the signal output part of USB module with the signal input part of USB commentaries on classics serial port module is connected, the signal output part of USB commentaries on classics serial port module is connected with the signal input part of logic conversion module, serial port downloading module respectively, the signal output part of logic conversion module with the signal input part of serial port downloading module is connected, power module provides the electric energy for USB module, USB commentaries on classics serial port module, logic conversion module, serial port downloading module respectively; the serial port downloading circuit is arranged in a matched mode through the USB module, the USB-to-serial port module, the logic conversion module and the serial port downloading module, one end of the USB module is connected with an upper computer, and the upper computer sends a downloading or resetting signal.

Description

Serial port downloading circuit

Technical Field

The utility model relates to a download circuit's technical field specifically is a serial ports download circuit.

Background

With the rapid development of science and technology, more and more electronic products come into the sight of people and become essential products in the life of people. Electronic products generally need to be written with the associated programs for better use.

However, when the program test is performed, the program needs to be written repeatedly, and if the program needs to be downloaded and reset continuously and manually, the operation is very troublesome, and the work efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

Therefore, a serial port downloading circuit is needed, which can realize automatic reset, improve the working efficiency and reduce the cost of the whole circuit.

The utility model provides a serial port download circuit, includes USB module, USB commentaries on classics serial port module, logic conversion module, serial port download module, power module, the signal output part of USB module with the signal input part of USB commentaries on classics serial port module is connected, the signal output part of USB commentaries on classics serial port module is connected with the signal input part of logic conversion module, serial port download module respectively, the signal output part of logic conversion module with the signal input part of serial port download module is connected, power module provides the electric energy for USB module, USB commentaries on classics serial port module, logic conversion module, serial port download module respectively.

In one embodiment, the serial port download module comprises a first control module U1, and the chip model number of the first control module U1 is ESP32-D0WDQ 6.

In one embodiment, the USB to serial port module includes a second control module U3 and at least one light emitting diode, and a signal output terminal of the second control module U3 is connected to a signal input terminal of the light emitting diode.

In one embodiment, the second control module U3 has a chip model CP 2104.

In one embodiment, the power supply module comprises a voltage regulation module U2, and the chip model of the voltage regulation module U2 is CE6210B 33P.

The serial port downloading circuit is arranged in a matching way through the USB module, the USB-to-serial port module, the logic conversion module and the serial port downloading module, one end of the USB module is connected with an upper computer, the upper computer sends a downloading or resetting signal, after the USB-to-serial port module receives the downloading signal, the downloading signal is sent to the logic conversion module, the logic conversion module sends the downloading signal to the serial port downloading module to start downloading, and a program sent by the upper computer is transmitted into the serial port downloading module; after the USB-to-serial port module receives the reset signal, the reset signal is sent to the logic conversion module, the logic conversion module sends the reset signal to the serial port downloading module, the serial port downloading module resets, the downloading reset can be automatically completed, the whole circuit is simple in structure, the cost is reduced, and the working efficiency is improved.

Drawings

Fig. 1 is a schematic diagram of a circuit structure of a serial port download circuit according to an embodiment of the present invention;

fig. 2 is a circuit diagram of a USB module and a USB to serial port module of the serial port download circuit of fig. 1 according to an embodiment of the present invention;

fig. 3 is a circuit diagram of a logic conversion module of the serial port download circuit according to fig. 1;

fig. 4 is a circuit diagram of a serial port download module of the serial port download circuit according to fig. 1;

fig. 5 is a circuit diagram of a power module of the serial port download circuit in fig. 1 according to an embodiment of the present invention.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5, a serial port downloading circuit includes a USB module 100, a USB to serial port module 200, a logic conversion module 300, a serial port downloading module 400, and a power module 500, wherein a signal output end of the USB module 100 is connected to a signal input end of the USB to serial port module 200, a signal output end of the USB to serial port module 200 is connected to signal input ends of the logic conversion module 300 and the serial port downloading module 400, a signal output end of the logic conversion module 300 is connected to a signal input end of the serial port downloading module 400, and the power module 500 provides electric energy to the USB module 100, the USB to serial port module 200, the logic conversion module 300, and the serial port downloading module 400, respectively.

In one embodiment, the serial port download module 400 comprises a first control module U1, the chip model number of the first control module U1 is ESP32-D0WDQ 6.

In one embodiment, the USB to serial port module 200 includes a second control module U3 and at least one light emitting diode, and a signal output terminal of the second control module U3 is connected to a signal input terminal of the light emitting diode.

In one embodiment, the second control module U3 has a chip model CP 2104.

In one embodiment, the power module 500 includes a voltage regulation module U2, the voltage regulation module U2 having a chip model number CE6210B 33P.

Pins B6 and B7 of the USB module 100 are respectively connected with pins D-, D + of a second control module U3 of the USB-to-serial port module 200, pins RXD and TXD of the USB-to-serial port module 200 are connected with pins U0TXD and U0RXD of the serial port downloading module 400, and pins CTS, RTS, DSR and DTR of the USB-to-serial port module 200 are respectively connected with one ends of resistors R17 and R18 of the logic conversion module 300; the collector of the transistor Q2 of the logic conversion module 300 is connected to the GPIO0 pin of the first control module U1, and the collector of the transistor Q3 of the logic conversion module 300 is connected to the GPIO2 pin of the first control module U1.

When the reset is started, the upper computer sends a reset signal to the USB to serial port module 200 through the USB module 100, the USB to serial port module 200 sends the reset signal to the logic conversion module 300, at this time, the DTR pin is at a high level, the collector of the triode Q1 is at a low level, a reset signal is generated, and the reset signal is sent to the serial port download module 400 through the collector of the triode Q1, so that the first control module U1 is reset; when downloading is needed, the upper computer sends a downloading signal to the USB to serial port module 200 through the USB module 100, the USB to serial port module 200 sends the downloading signal to the logic conversion module 300, at this time, the RTS pin is at a low level, the transistor Q2 drives the IO0 to be at a high level, the transistor Q3 drives the IO2 to be at a high level, a downloading signal is generated, and the first control module U1 downloads a program transmitted by the upper computer.

Thus, the serial port downloading circuit is arranged by matching the USB module 100, the USB-to-serial port module 200, the logic conversion module 300 and the serial port downloading module 400, one end of the USB module 100 is connected with an upper computer, the upper computer sends a downloading or resetting signal, when the USB-to-serial port module 200 receives the downloading signal, the downloading signal is sent to the logic conversion module 300, the logic conversion module 300 sends the downloading signal to the serial port downloading module 400 to start downloading, and a program sent by the upper computer is transmitted into the serial port downloading module 400; after the USB serial-to-serial port module 200 receives the reset signal, the reset signal is sent to the logic conversion module 300, the logic conversion module 300 sends the reset signal to the serial port download module 400, the serial port download module 400 resets, and the download reset can be automatically completed.

Further, in order to make the circuit compatible better, the chip model of the second control module U3 is CP 2104.

Thus, CP2104 is a single chip USB to UART bridge controller, which upgrades the RS-232/RS-485 design to USB provides a simple solution, comprising a USB 2.0 full speed functional controller, USB transceiver, oscillator, one-time programmable ROM, and asynchronous serial data bus (UART) with complete modem control signals. And other external USB components are not needed, so that the compatibility is better.

Further, in order to better obtain the working state of the whole circuit, the USB to serial port module 200 includes a second control module U3 and at least one light emitting diode.

For example, the download state or the reset state may be determined by emitting light of different colors from one light emitting diode. The download state or the reset state is also determined by emitting light from a plurality of different light emitting diodes. Therefore, a user can judge the working state of the whole circuit according to different states of the light-emitting diode, and the LED drive circuit is simpler and more convenient.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A serial port downloading circuit is characterized in that: the USB serial port downloading device comprises a USB module, a USB-to-serial port module, a logic conversion module, a serial port downloading module and a power supply module, wherein the signal output end of the USB module is connected with the signal input end of the USB-to-serial port module, the signal output end of the USB-to-serial port module is connected with the signal input end of the logic conversion module and the signal input end of the serial port downloading module respectively, the signal output end of the logic conversion module is connected with the signal input end of the serial port downloading module, and the power supply module provides electric energy for the USB module, the USB-to-serial port module, the logic conversion module and the serial port downloading module respectively.

2. The serial port download circuit according to claim 1, characterized in that: the serial port downloading module comprises a first control module U1, and the chip model number of the first control module U1 is ESP32-D0WDQ 6.

3. The serial port download circuit according to claim 1, characterized in that: the USB-to-serial port module comprises a second control module U3 and at least one light-emitting diode, and the signal output end of the second control module U3 is connected with the signal input end of the light-emitting diode.

4. The serial port download circuit according to claim 3, characterized in that: the chip model of the second control module U3 is CP 2104.

5. The serial port download circuit according to claim 1, characterized in that: the power supply module comprises a voltage regulating module U2, and the chip model of the voltage regulating module U2 is CE6210B 33P.