CN210627176U - Android main board hardware watchdog circuit system based on single-chip microcomputer implementation - Google Patents
Android main board hardware watchdog circuit system based on single-chip microcomputer implementation Download PDFInfo
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- CN210627176U CN210627176U CN201921770270.5U CN201921770270U CN210627176U CN 210627176 U CN210627176 U CN 210627176U CN 201921770270 U CN201921770270 U CN 201921770270U CN 210627176 U CN210627176 U CN 210627176U
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Abstract
The utility model discloses an android mainboard hardware watchdog circuit system based on singlechip is realized, this circuit system comprises android platform, power management circuit, singlechip module circuit, DCDC power module, android platform peripheral hardware, DCDC power module circuit comprises NB679GD, peripheral device, CPU-5V is power supply for power management circuit and peripheral device circuit; the single chip microcomputer module circuit consists of a minimum system circuit and a single chip microcomputer power supply circuit, a PWR _ EN pin is connected with the DCDC power supply module to control the on-off of the total power supply of the CPU-5V to the android platform, the MCU _5V provides a 5V power supply for the DCDC power supply module, and an I2C interface is used for feeding dogs to the android platform. The utility model discloses the circuit is controlled to the power of whole system, is fit for the extreme condition that the power could solve the problem of can only restarting, and the singlechip is direct to get the electricity from NB679 GD's built-in LDO, has simplified circuit design, more saves the cost.
Description
Technical Field
The utility model belongs to the technical field of electronic data processing field and electric communication, specifically speaking relates to an android main board hardware watchdog circuit system based on singlechip realizes.
Background
The existing vending machine and advertising machine industries and the like are all in an unattended state, when a system goes wrong, if a relevant emergency treatment mechanism is absent, the vending machine cannot sell products, and the advertising machine cannot issue advertisements, so that the company can lose certain loss in image and economy. The emergency mechanism can be software reset or hardware reset, the software reset technology is incapable of solving the crash situation, the technology is a hardware reset technology, the reliability is higher, and the problem caused by the crash phenomenon can be solved.
Disclosure of Invention
The utility model discloses the technical problem who solves lies in overcoming prior art's not enough, provides an android main board hardware watchdog circuit system based on singlechip realizes, for solving above-mentioned technical problem, the utility model discloses a technical scheme's basic design is:
the utility model provides an android mainboard hardware watchdog circuit system based on singlechip realizes, includes:
the android platform is an android hardware circuit built on the basis of CPUs (central processing units) such as RK3288, RK3399, RK3368 and A64 and a system thereof;
the peripheral equipment comprises an android platform peripheral, wherein the android platform peripheral detects the work of the peripheral circuit through an application program and a communication interface based on a peripheral application circuit carried by an android mainboard;
the power management circuit is used for supplying power to the android platform;
the DCDC power supply module circuit consists of NB679GD and peripheral devices, and the CPU-5V supplies power for the power supply management circuit and the peripheral circuits;
the single chip microcomputer module circuit consists of a minimum system circuit and a single chip microcomputer power supply circuit, a PWR _ EN pin is connected with the DCDC power supply module to control the on-off of the total power supply of the CPU-5V to the android platform, the MCU _5V provides a 5V power supply for the DCDC power supply module, and an I2C interface is used for feeding dogs to the android platform.
Furthermore, the minimum system circuit of the singlechip module circuit is the minimum system circuit of the singlechip STM8S103F3P6,
further, the MCU1 of the single chip microcomputer module circuit is a single chip microcomputer program debugging and burning port.
Further, the I2C interface includes I2C4_ SCL, I2C4_ SDA.
After the technical scheme is adopted, compared with the prior art, the utility model following beneficial effect has.
The utility model discloses the circuit is controlled to the power of whole system, is fit for the extreme condition that the power could solve the problem of can only restarting, and the singlechip is direct to get the electricity from NB679 GD's built-in LDO, has simplified circuit design, more saves the cost.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a block diagram of an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a single-chip module according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a DCDC power module according to an embodiment of the present invention;
it should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.
Example one
As shown in fig. 1-3, in the embodiment, the hardware watchdog circuit system for the android motherboard based on the single chip microcomputer is composed of an android platform, a power management circuit, a single chip microcomputer module circuit, a DCDC power module, and an peripheral of the android platform. The android platform is connected with the power management circuit and the android platform peripheral equipment in a bidirectional data transmission mode, the single chip microcomputer module circuit is connected with the android platform, the DCDC power module is connected with the power management circuit and connected with the single chip microcomputer module circuit in a bidirectional data transmission mode, and external 12V input supply is controlled by the DCDC power module.
Android platform: the android platform is an android hardware circuit built based on CPUs such as RK3288, RK3399, RK3368 and A64 and a system thereof.
Peripheral equipment of the android platform: the peripheral equipment of the android platform is a peripheral application circuit carried on the basis of an android mainboard, and certain specific functions can be realized. The android main board detects the work of the peripheral circuit through an application program and a communication interface.
The power management circuit: and the power management circuit supplies power to the android platform.
Singlechip module circuit (as shown in fig. 2): the singlechip module circuit consists of a singlechip STM8S103F3P6 minimum system circuit and a singlechip power supply circuit. The MCU1 is a single-chip microcomputer program debugging and burning port, the PWR _ EN pin is used for controlling the total power supply on-off of the android hardware platform system, the MCU _5V is a 5V power supply provided by the DCDC power module, and a group of I2C interfaces I2C4_ SCL and I2C4_ SDA are used for feeding dogs for the android platform.
DCDC power module (as shown in fig. 3): the DCDC power module circuit is composed of NB679GD and its peripheral devices. The CPU-5V supplies power for the power management circuit and the peripheral circuit, the PWR _ EN pin can control the output on-off of the CPU-5V, when the PWR _ EN is in a high level, the CPU-5V outputs 5V, otherwise, 0V is output; the MCU _5V supplies power for the singlechip, and the MCU _5V outputs 5V as long as the voltage is 12V electrified.
The working process is as follows: after the DC12V is connected, the android motherboard starts working. Firstly, the MCU _5V is powered on, the singlechip starts to work, the PWR _ EN is set to be at a high level, the NB679GD starts to work, the CPU-5V outputs 5V, the android platform starts to work, after the android system is started, the android peripheral circuit starts to work, the android system detects the working conditions of the peripheral and the system, if the working conditions are normal, a certain section of code (commonly called feeding dog) is sent to the singlechip regularly through an I2C port, if the working conditions are abnormal, the system cannot solve the problem and needs to be powered on again, the singlechip is not fed with the dog, or the system is halted, at the moment, the singlechip cannot receive a dog feeding signal, the singlechip pulls down the PWR _ EN, the MCU-5V is turned off, the PWR _ EN is pulled up again after 5 seconds, the CPU-5V outputs 5V again, and the android system platform starts to work again.
The circuit system controls the power supply of the whole system, is suitable for extreme conditions that the problem can be solved only by halting or restarting the power supply, and the singlechip directly takes power from the built-in LDO of NB679GD, so that the circuit design is simplified, and the cost is saved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.
Claims (4)
1. The utility model provides an android mainboard hardware watchdog circuit system based on singlechip realizes, its characterized in that includes:
the android platform is an android hardware circuit built based on RK3288, RK3399, RK3368 or A64CPU and a system thereof;
the peripheral equipment comprises an android platform peripheral, wherein the android platform peripheral detects the work of the peripheral circuit through an application program and a communication interface based on a peripheral application circuit carried by an android mainboard;
the power management circuit is used for supplying power to the android platform;
the DCDC power supply module circuit consists of NB679GD and peripheral devices, and the CPU-5V supplies power for the power supply management circuit and the peripheral circuits;
the single chip microcomputer module circuit consists of a minimum system circuit and a single chip microcomputer power supply circuit, a PWR _ EN pin is connected with the DCDC power supply module to control the on-off of the total power supply of the CPU-5V to the android platform, the MCU _5V provides a 5V power supply for the DCDC power supply module, and an I2C interface is used for feeding dogs to the android platform.
2. The hardware watchdog circuit system of the android mainboard based on the single chip microcomputer implementation of claim 1, wherein: the minimum system circuit of the singlechip module circuit is a minimum system circuit of a singlechip STM8S103F3P 6.
3. The hardware watchdog circuit system of the android mainboard based on the single chip microcomputer implementation of claim 1, wherein: the MCU1 of the singlechip module circuit is a singlechip program debugging and burning port.
4. The hardware watchdog circuit system of the android mainboard based on the single chip microcomputer implementation of claim 1, wherein: the I2C interface includes I2C4_ SCL, I2C4_ SDA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921770270.5U CN210627176U (en) | 2019-10-22 | 2019-10-22 | Android main board hardware watchdog circuit system based on single-chip microcomputer implementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921770270.5U CN210627176U (en) | 2019-10-22 | 2019-10-22 | Android main board hardware watchdog circuit system based on single-chip microcomputer implementation |
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| Publication Number | Publication Date |
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| CN210627176U true CN210627176U (en) | 2020-05-26 |
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| CN201921770270.5U Active CN210627176U (en) | 2019-10-22 | 2019-10-22 | Android main board hardware watchdog circuit system based on single-chip microcomputer implementation |
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