CN106339238B - Serial port multi-mode automatic multiplexing chip fast programming system - Google Patents
Serial port multi-mode automatic multiplexing chip fast programming system Download PDFInfo
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- CN106339238B CN106339238B CN201610725839.0A CN201610725839A CN106339238B CN 106339238 B CN106339238 B CN 106339238B CN 201610725839 A CN201610725839 A CN 201610725839A CN 106339238 B CN106339238 B CN 106339238B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
- G06F8/65—Updates
- G06F8/66—Updates of program code stored in read-only memory [ROM]
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- 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
- G06F13/14—Handling requests for interconnection or transfer
- G06F13/16—Handling requests for interconnection or transfer for access to memory bus
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- G06F13/1684—Details of memory controller using multiple buses
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Abstract
The invention provides a serial port multi-mode automatic multiplexing chip fast programming system, which comprises an STM32 chip, an ESP8266 chip, a data interface, a first programming module and a serial port file module, wherein the STM32 chip is in communication connection with the ESP8266 chip, and the output ends of the first programming module and the serial port file module can be inserted into the input end of the data interface; an STM32 chip is defined with a first detection pin and a third detection pin, and an ESP8266 chip is defined with a second detection pin; when the first programming module is plugged with the data interface, an eighth pin of the first programming module is connected with an eighth pin of the data interface and then respectively connected with a second detection pin and a third detection pin; when the serial port file module is plugged with the data interface, a first pin of the serial port file module, a first pin of the data interface and a first detection pin are sequentially connected; the STM32 chip is provided with a serial port operation module, and the ESP8266 chip is provided with a state setting module. The invention can realize the automatic switching of various working modes of the ESP8266 chip without toggling a switch.
Description
Technical Field
The invention relates to the technical field of chip multiplexing, in particular to a serial port multi-mode automatic multiplexing chip fast programming system.
Background
A WIFI expansion board based on ESP 826612E, abbreviated as ESP8266 chip. The ESP8266 chip has the following three modes:
(1) and a serial port communication mode between the STM32 chip: in the mode, the serial port between the ESP8266 chip and the STM32 chip is kept connected, and the GPIO0 pin of the ESP8266 chip is configured to be high level.
(2) ROM programming mode: in the mode, serial port connection between the ESP8266 chip and the STM32 chip is disconnected, the serial port connection of the ESP8266 chip is programmed into a module, data are transmitted through the serial port of the ESP8266 chip, and the GPIO0 pin of the ESP8266 chip is configured to be low level.
(3) The serial port file working mode is as follows: in the mode, the serial port connection between the ESP8266 chip and the STM32 chip is disconnected, the serial port of the ESP8266 chip is connected with a serial port file module, the internal file content of the ESP8266 chip is changed through the serial port of the ESP8266 chip, and the GPIO0 pin of the ESP8266 chip is configured to be at a high level.
It can be seen from the above that, when working in the second mode or the third mode, the serial port of the ESP8266 chip needs to be used, so the serial port connection between the ESP8266 chip and the STM32 chip in the first mode must be disconnected, and then the ROM programming or serial file operation is performed through the serial port of the ESP8266 chip; and when the ROM programming or the serial file operation is finished, the serial communication between the ESP8266 chip and the STM32 chip is recovered. In the traditional mode, the aforesaid disconnection and recovery generally adopt the mode of manual toggle switch, and this mode needs a switch of independent design to be used for disconnecting and recovering the serial ports connection between STM32 chip and the ESP8266 chip, and the working method is loaded down with trivial details, and it is very inconvenient to use.
Disclosure of Invention
The invention aims to provide a serial port multi-mode automatic multiplexing chip fast programming system aiming at the defects of the prior art, and can well solve the problems of complex operation and inconvenient use when the working mode of an ESP8266 chip is switched.
In order to meet the requirements, the technical scheme adopted by the invention is as follows: the system comprises an STM32 chip, an ESP8266 chip, a data interface, a first programming module for realizing programming of the ESP8266 chip and a serial file module for realizing serial file operation of the ESP8266 chip, wherein the STM32 chip is in communication connection with the ESP8266 chip, the data interface is respectively connected with the STM32 chip and the ESP8266 chip, and the output ends of the first programming module and the serial file module can be inserted into the input end of the data interface; the STM32 chip is defined with a first detection pin and a third detection pin, the ESP8266 chip is defined with a second detection pin, and the first detection pin, the second detection pin and the third detection pin are all connected to a 3.3V level; the grounding pin of the first programming module is connected with the eighth pin of the first programming module, when the first programming module is plugged with the data interface, the eighth pin of the first programming module is connected with the eighth pin of the data interface and then respectively connected with the second detection pin and the third detection pin, and the grounding pin of the first programming module is connected with the grounding pin of the data interface and then grounded; the grounding pin of the serial port file module is connected with the first pin of the serial port file module, when the serial port file module is inserted into the data interface, the first pin of the serial port file module, the first pin of the data interface and the first detection pin are sequentially connected, and the grounding pin of the serial port file module is grounded after being connected with the grounding pin of the data interface; the STM32 chip is provided with a serial port operation module for performing disconnection or connection operation on a serial port between the STM32 chip and the ESP8266 chip by detecting the levels of the first detection pin and the third detection pin, and the ESP8266 chip is provided with a state setting module for setting the working state of the ESP8266 chip by detecting the second detection pin.
The serial port multi-mode automatic multiplexing chip fast programming system has the following advantages:
(1) the method comprises the steps that a serial port operation module and a state setting module are arranged, the serial port operation module detects the levels of a first detection pin and a third detection pin in real time, if the first detection pin is detected to be low level, the third detection pin is detected to be high level, the serial port file module is inserted, an STM32 chip disconnects the serial port connection between the STM32 chip and an ESP8266 chip, and at the moment, serial port file operation can be carried out; if the STM32 chip detects that the first detection pin is at a high level and the third detection pin is at a low level, the first programming module is inserted, the STM32 chip breaks the serial port connection between the STM32 chip and the ESP8266 chip, and the ROM programming of the ESP8266 chip can be carried out at the moment; if the STM32 chip detects that the first detection pin is at a high level and the third detection pin is at a high level, the current serial port communication working mode is between the STM32 and the ESP8266, the STM32 chip is connected with the serial port between the STM32 chip and the ESP8266 chip, and at the moment, serial port communication between the STM32 chip and the ESP8266 can be carried out; the automatic disconnection/recovery of serial port connection between the STM32 chip and the ESP8266 chip is realized, switching devices are saved, and the product design difficulty and the product cost are reduced;
(2) by adopting a data interface, the communication between an STM32 chip and an ESP8266 chip, the ROM programming of the ESP8266 chip, the serial file operation of the ESP8266 chip and the ROM programming of the STM32 chip can be automatically realized by a first programming module, a second programming module and a serial file module which can be plugged with the data interface.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a block diagram of the present application;
FIG. 2 is a schematic diagram of the circuit connection of the ROM programming mode of an ESP8266 chip;
FIG. 3 is a schematic diagram of a circuit connection in ESP8266 chip serial port file mode;
FIG. 4 is a schematic diagram of the circuit connection of the ROM programming mode of the STM32 chip.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings and specific embodiments.
In the following description, references to "one embodiment," "an embodiment," "one example," "an example," etc., indicate that the embodiment or example so described may include a particular feature, structure, characteristic, property, element, or limitation, but every embodiment or example does not necessarily include the particular feature, structure, characteristic, property, element, or limitation. Moreover, repeated use of the phrase "in accordance with an embodiment of the present application" although it may possibly refer to the same embodiment, does not necessarily refer to the same embodiment.
Certain features that are well known to those skilled in the art have been omitted from the following description for the sake of simplicity.
According to an embodiment of the application, a serial port multi-mode automatic multiplexing chip fast programming system is provided, as shown in fig. 1-4, including an STM32 chip, an ESP8266 chip, a data interface, a first programming module for implementing programming of the ESP8266 chip, and a serial file module for implementing serial file operation of the ESP8266 chip, where the STM32 chip and the ESP8266 chip are in communication connection, the data interface is connected with the STM32 chip and the ESP8266 chip, respectively, and output ends of the first programming module and the serial file module are both pluggable with input ends of the data interface; the STM32 chip is defined with a first detection pin and a third detection pin, the ESP8266 chip is defined with a second detection pin, and the first detection pin, the second detection pin and the third detection pin are all connected to a 3.3V level; the grounding pin of the first programming module is connected with the eighth pin of the first programming module, when the first programming module is plugged with the data interface, the eighth pin of the first programming module is connected with the eighth pin of the data interface and then respectively connected with the second detection pin and the third detection pin, and the grounding pin of the first programming module is connected with the grounding pin of the data interface and then grounded; the grounding pin of the serial port file module is connected with the first pin of the serial port file module, when the serial port file module is inserted into the data interface, the first pin of the serial port file module, the first pin of the data interface and the first detection pin are sequentially connected, and the grounding pin of the serial port file module is grounded after being connected with the grounding pin of the data interface; the STM32 chip is provided with a serial port operation module for performing disconnection or connection operation on a serial port between the STM32 chip and the ESP8266 chip by detecting the levels of the first detection pin and the third detection pin, and the ESP8266 chip is provided with a state setting module for setting the working state of the ESP8266 chip by detecting the second detection pin. The first pin and the eighth pin of the data interface only indicate that the two pins are different pins and do not represent the sequence of actual pins; the same is true of the first pin and the eighth pin in the first burn-in module.
The data interface may adopt 7 cores or an interface with more than 7 cores, and in this embodiment, an RJ45 interface is adopted. Therefore, the connection mode of the ESP8266 chip, the STM32 chip and the RJ45 interface in this embodiment is as follows: a transmitting pin UOTXD of the ESP8266 chip is respectively connected with a receiving pin USART-RX of the STM32 chip and a receiving pin WIFI-R of an RJ45 interface, a receiving pin UORDX of the ESP8266 chip is respectively connected with a transmitting pin USART-TX of the STM32 chip and a transmitting pin WIFI-T of an RJ45 interface, and a grounding pin of the ESP8266 chip, a grounding pin of the STM32 chip and a grounding pin of the RJ45 are connected and grounded; a first pin MODE-SET of an RJ45 interface is connected with a first detection pin Mode-Check-GPIO of an STM32 chip, a serial data pin SWDIO of an RJ45 interface is connected with a serial data pin PA13 of an STM32 chip, a serial clock pin SWCLK of an RJ45 interface is connected with a serial clock pin PA14 of an STM32 chip, an eighth pin ESP8266-GPIO0-SET of the RJ45 interface is respectively connected with a second detection pin GPIO0 and a third detection pin WiFi-IO/0, and the three detection pins are all connected with a 3.3V high level.
The first programming module adopts USB-TTL, and a grounding pin GND in the first programming module is connected with an eighth pin; when the ROM programming mode of the ESP8266 chip needs to be implemented, the first programming module is inserted into the RJ45 interface, as shown in fig. 2, the connection mode is as follows: the grounding pin GND of the USB-TTL is connected with the grounding pin GND of the RJ45 interface, the eighth pin of the USB-TTL is connected with the eighth pin ESP8266-GPIO0-SET of the RJ45 interface, the transmitting pin Tx is connected with the receiving pin WIFI-R of the RJ45 interface, and the receiving pin Rx is connected with the transmitting pin WIFI-T of the RJ45 interface. The working principle is as follows: the grounding pin GND of the USB-TTL is connected with the grounding pin GND of the RJ45 interface and grounded, the eighth pin ESP8266-GPIO0-SET of the RJ45 interface is pulled to be at a low level forcibly, so that the second detection pin GPIO0 and the third detection pin WiFi-IO/0 are pulled to be at a low level, the serial port operation module continuously detects the levels of the first detection pin Mode-Check-GPIO and the third detection pin WiFi-IO/0, once the first detection pin Mode-Check-GPIO is detected to be at a high level and the third detection pin WiFi-IO/0 is detected to be at a low level, the first programming module is known to be inserted, and the serial port operation module automatically disconnects the serial port between the STM32 chip and the ESP8266 chip. Meanwhile, when the state setting module detects that the second detection pin GPIO0 is at a low level, the operating state of the ESP8266 chip is set to the chip ROM programming state, so that the ROM programming mode of the ESP8266 chip can be entered.
The serial port file module also adopts USB-TTL, and a grounding pin GND in the serial port file module is connected with a first pin of the serial port file module; when the serial file mode of the ESP8266 chip needs to be realized, the serial file module is inserted into the RJ45 interface, as shown in fig. 3, the connection mode is as follows: the ground pin GND of the USB-TTL is connected with the ground pin GND of the RJ45 interface, the first pin of the USB-TTL is connected with the first pin MODE-SET of the RJ45 interface, the sending pin Tx is connected with the receiving pin WIFI-R of the RJ45 interface, and the receiving pin Rx is connected with the sending pin WIFI-T of the RJ45 interface. The working principle is as follows: a grounding pin GND of the USB-TTL is connected with a grounding pin GND of the RJ45 interface and grounded, and a first pin MODE-SET of the RJ45 interface is forcibly pulled to be at a low level; at the moment, when the serial port operation module detects that the first detection pin Mode-Check-GPIO is in a low level and the third detection pin WiFi-IO/0 is in a high level, the serial port operation module knows that the serial port file module is inserted, and automatically disconnects the serial port between the STM32 chip and the ESP8266 chip; meanwhile, the state setting module detects that the second detection pin GPIO0 is at a high level, and sets the operating state of the ESP8266 chip to a serial file operating state, so that the serial file operating mode of the ESP8266 chip can be entered.
The system also comprises a second programming module for programming the STM32 chip, wherein the second programming module adopts ST-LINK, and the second programming module is inserted into the RJ45 interface to directly realize the programming of the STM32 chip, as shown in FIG. 4, the connection mode is as follows: the ground pin GND of the ST-LINK is connected with the ground pin GND of the RJ45 interface, the serial data pin SWDIO of the ST-LINK is connected with the serial data pin SWDIO of the RJ45 interface, and the serial clock pin SWCLK of the ST-LINK is connected with the serial clock pin SWCLK of the RJ45 interface.
In the system, once the serial port operation module detects that the Mode-Check-GPIO pin of the first detection pin and the WiFi-IO/0 pin of the third detection pin are both high level, the serial port operation module knows that no module is inserted into the RJ45, and automatically establishes the serial port connection between an STM32 chip and an ESP8266 chip; meanwhile, the state setting module detects that the second detection pin GPIO0 is at a high level, and sets the working state of the ESP8266 chip to be a serial port communication working state, so that the serial port communication working mode of the STM32 chip and the ESP8266 chip can be entered.
The system can realize automatic switching between four working modes of communication between an STM32 chip and an ESP8266 chip, ROM programming of the ESP8266 chip, serial file operation of the ESP8266 chip and ROM programming of the STM32 chip without toggling a switch, is convenient to use, saves switching devices, and reduces the product design difficulty and the product cost.
The core of the system is that the system comprises a chip, a serial port is required to be used in a communication mode of the chip and another chip, a serial port is also required to be used in a ROM (read only memory) programming mode or a serial port file mode, the serial port is required to be disconnected or connected when the modes are switched, and the system is provided with a program module which is used for detecting the level and automatically disconnecting or connecting the serial port according to the detected level.
The above-mentioned embodiments only show some embodiments of the present invention, and the description thereof is more specific and detailed, but should not be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the claims.
Claims (3)
1. A serial port multi-mode automatic multiplexing chip fast programming system is characterized in that: the system comprises an STM32 chip, an ESP8266 chip, a data interface, a first programming module for realizing programming of the ESP8266 chip and a serial file module for realizing serial file operation of the ESP8266 chip, wherein the STM32 chip and the ESP8266 chip are in communication connection, the data interface is respectively connected with the STM32 chip and the ESP8266 chip, and the output ends of the first programming module and the serial file module can be independently plugged with the input end of the data interface; the STM32 chip is defined with a first detection pin and a third detection pin, the ESP8266 chip is defined with a second detection pin, and the first detection pin is a Mode-Check-GPIO; the second detection pin is GPIO 0; the third detection pin is WiFi-IO/0; when the first programming module is plugged with the data interface, the eighth pin of the first programming module is connected with the eighth pin of the data interface and then respectively connected with the second detection pin and the third detection pin, the second detection pin is connected with a 3.3V level, and the grounding pin of the first programming module is connected with the grounding pin of the data interface and then grounded; the grounding pin of the serial file module is connected with the first pin of the serial file module, when the serial file module is plugged with the data interface, the first pin of the serial file module, the first pin of the data interface and the first detection pin are sequentially connected, the first detection pin is connected with a 3.3V level, and the grounding pin of the serial file module is grounded after being connected with the grounding pin of the data interface; the STM32 chip is provided with a serial port operation module which can disconnect or connect the serial port between the STM32 chip and the ESP8266 chip by detecting the level of the first detection pin and the third detection pin, and the ESP8266 chip is provided with a state setting module which can set the working state of the ESP8266 chip by detecting the second detection pin; the first programming module adopts USB-TTL, and an eighth pin of the first programming module is an output pin; the serial port file module adopts USB-TTL, and a first pin of the serial port file module is an output pin; the data interface adopts an RJ45 interface.
2. The serial port multimode automatic multiplexing chip fast programming system according to claim 1, characterized in that: the STM32 chip programming device further comprises a second programming module for realizing STM32 chip programming, and the second programming module is plugged with the data interface.
3. The serial port multimode automatic multiplexing chip fast programming system according to claim 2, characterized in that: and the second programming module adopts ST-LINK.
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| CN201610725839.0A CN106339238B (en) | 2016-08-26 | 2016-08-26 | Serial port multi-mode automatic multiplexing chip fast programming system |
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| CN201610725839.0A CN106339238B (en) | 2016-08-26 | 2016-08-26 | Serial port multi-mode automatic multiplexing chip fast programming system |
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| CN106339238B true CN106339238B (en) | 2020-03-24 |
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| CN108196855A (en) * | 2018-03-15 | 2018-06-22 | 安徽农业大学 | A kind of device of internet terminal node |
| CN111158710B (en) * | 2019-12-30 | 2023-08-25 | 杭州迪普科技股份有限公司 | Program programming method, device and network equipment |
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| CN103336755A (en) * | 2013-06-08 | 2013-10-02 | 中国人民解放军92859部队 | Program-controlled multimode serial port distributor |
| CN103439901A (en) * | 2013-08-08 | 2013-12-11 | 陕西科技大学 | Program programming circuit universal to single chip microcomputer and embedded type microprocessor |
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2016
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| US6038663A (en) * | 1995-11-29 | 2000-03-14 | Zf Microsystems, Inc. | IBM PC compatible multi-chip module |
| CN101141402A (en) * | 2007-09-30 | 2008-03-12 | 华为技术有限公司 | Serial port multiplexing method and device |
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