CN203708403U - Watchdog circuit suitable for Android set top box - Google Patents
Watchdog circuit suitable for Android set top box Download PDFInfo
- Publication number
- CN203708403U CN203708403U CN201420050650.2U CN201420050650U CN203708403U CN 203708403 U CN203708403 U CN 203708403U CN 201420050650 U CN201420050650 U CN 201420050650U CN 203708403 U CN203708403 U CN 203708403U
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- China
- Prior art keywords
- top box
- set top
- watchdog
- android set
- usb
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- Expired - Lifetime
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- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model relates to a watchdog circuit, and specifically relates to a watchdog circuit suitable for an Android set top box. The watchdog circuit suitable for an Android set top box comprises an Android set top box mainboard and attendant equipment connected with the same. The watchdog circuit is characterized in that the watchdog circuit further comprises a watchdog chip integrated onto a USB, the Android set top box mainboard is connected with the watchdog chip through a USB-to-serial port module, the reset pin of the Android set top box mainboard is connected with the reset pin of the watchdog chip, and the attendant equipment is connected with the watchdog chip through an RS-232 interface. According to the utility model, the cost is lower than an industrial watchdog circuit, the watchdog circuit not only can be used to identify whether the working state of the Android set top box is normal, and but also can be used to receive a command sent by the Android set top box to flexibly control the attendant equipment connected with the Android set top box, so the interference between the Android set top box and the attendant equipment can be avoided.
Description
Technical field
The utility model relates to a kind of watchdog circuit, is specifically related to a kind of watchdog circuit that is applicable to Android Set Top Box.
Background technology
At present, known house dog is by feeding dog end (input), RST (output), WDT (timing reset terminal) composition.Major applications, on industrial machine, when crashing or being absorbed in after endless loop appears in single-chip microcomputer, makes monolithic processor resetting by sending data, can again normally work.And civil equipment also can be often because certain reason causes deadlock in the process using, if user of service can not find in time, normal operation and the service conditions of equipment will be affected, so civil equipment equally needs watchdog function, owing to being applied to industrial house dog, its circuit is integrated in to industrial machine inside, cost is higher on the one hand, uses on the other hand underaction, so be not suitable for civilian.
Summary of the invention
For overcoming above-mentioned shortcoming, the utility model proposes a kind of watchdog circuit that is applicable to Android Set Top Box, cost is lower to be suitable for civilian and to use flexibly.
The utility model is by the following technical solutions:
A kind of watchdog circuit that is applicable to Android Set Top Box, comprise Android set top box main and connected attendant equipment, it is characterized in that: also comprise the watchdog chip that is integrated in USB, described Android set top box main turns serial port module with watchdog chip by USB and is connected, the reseting pin of described Android set top box main is connected with the reset pin of watchdog chip, and described attendant equipment is connected with watchdog chip by RS-232 interface.
USB function to Android Set Top Box is expanded, and integrated watchdog chip obtains USB house dog hardware in USB, powers in normal situation at USB, and itself does not crash.Application software in Set Top Box turns serial mode by USB, and timing sends refresh data to USB watchdog chip.USB watchdog chip is confiscated refresh data at certain hour, and to providing reset pulse on the reset pin on it, the reseting pin that reset pulse is sent to Set Top Box resets Set Top Box.USB watchdog chip provides RS-232 interface, and set-top box application software sends the data of specified format to USB watchdog chip by driver, and then control the attendant equipment being connected with watchdog chip by RS-232.
Further, described watchdog circuit also comprises a switching circuit, and need to whether make Android set top box main and the watchdog chip of described switching circuit based on watchdog function is switched on or switched off.Need to apply house dog time, switching circuit is connected, started watchdog function.While not needing to apply house dog, cut-off switch circuit, closes watchdog function.
Further, when described switching circuit disconnects, described Android set top box main and USB are direct-connected.Now can computer be connected with Android set top box main by usb data line, Android Set Top Box is safeguarded.
Compared with prior art, advantage of the present utility model and good effect are:
1, the more industrial watchdog circuit of cost is low, whether the operating state that can identify Android Set Top Box is normal, the order attendant equipment that control is connected with Android Set Top Box flexibly that Android Set Top Box sends be can receive again, Android Set Top Box and the mutual interference of attendant equipment phase avoided;
2, can be switched on or switched off according to need to whether make Android set top box main and the watchdog chip of watchdog function, use flexibly.
3, when the switching circuit of watchdog circuit disconnects, can computer be connected with Android set top box main by usb data line, be convenient to Android Set Top Box to safeguard.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
The watchdog circuit that is applicable to Android Set Top Box as shown in Figure 1, comprise Android set top box main and connected attendant equipment, also comprise the watchdog chip that is integrated in USB, described Android set top box main turns serial port module with watchdog chip by USB and is connected, the reseting pin of described Android set top box main is connected with the reset pin of watchdog chip, and described attendant equipment is connected with watchdog chip by RS-232 interface.
USB function to Android Set Top Box is expanded, and integrated watchdog chip obtains USB house dog hardware in USB, powers in normal situation at USB, and itself does not crash.Application software in Set Top Box turns serial mode by USB, and timing sends refresh data to USB watchdog chip.USB watchdog chip is confiscated refresh data at certain hour, and to providing reset pulse on the reset pin on it, the reseting pin that reset pulse is sent to Set Top Box resets Set Top Box.USB watchdog chip provides RS-232 interface, and set-top box application software sends the data of specified format to USB watchdog chip by driver, and then control the attendant equipment being connected with watchdog chip by RS-232.
This watchdog circuit also comprises a switching circuit, and need to whether make Android set top box main and the watchdog chip of described switching circuit based on watchdog function is switched on or switched off.
When switching circuit disconnects, described Android set top box main and USB are direct-connected.Now can computer be connected with Android set top box main by usb data line, Android Set Top Box is safeguarded.
The above; only preferred embodiment of the present utility model; it is not the restriction of the utility model being made to other form; any those skilled in the art of being familiar with can utilize the technology of above-mentioned announcement to be changed improvement. and be not depart from technical solutions of the utility model content, any simple modification of above enforcement being done according to the utility model technical spirit in every case. still belong to the protection range of technical solutions of the utility model.
Claims (3)
1. one kind is applicable to the watchdog circuit of Android Set Top Box, comprise Android set top box main and connected attendant equipment, it is characterized in that: also comprise the watchdog chip that is integrated in USB, described Android set top box main turns serial port module with watchdog chip by USB and is connected, the reseting pin of described Android set top box main is connected with the reset pin of watchdog chip, and described attendant equipment is connected with watchdog chip by RS-232 interface.
2. watchdog circuit according to claim 1, is characterized in that: described watchdog circuit also comprises a switching circuit, and need to whether make Android set top box main and the watchdog chip of described switching circuit based on watchdog function is switched on or switched off.
3. watchdog circuit according to claim 2, is characterized in that: when described switching circuit disconnects, described Android set top box main and USB are direct-connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420050650.2U CN203708403U (en) | 2014-01-24 | 2014-01-24 | Watchdog circuit suitable for Android set top box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420050650.2U CN203708403U (en) | 2014-01-24 | 2014-01-24 | Watchdog circuit suitable for Android set top box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203708403U true CN203708403U (en) | 2014-07-09 |
Family
ID=51058778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420050650.2U Expired - Lifetime CN203708403U (en) | 2014-01-24 | 2014-01-24 | Watchdog circuit suitable for Android set top box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203708403U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106528369A (en) * | 2016-10-17 | 2017-03-22 | 盘锦英迈科技有限公司 | USB type computer watchdog apparatus and control method thereof |
-
2014
- 2014-01-24 CN CN201420050650.2U patent/CN203708403U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106528369A (en) * | 2016-10-17 | 2017-03-22 | 盘锦英迈科技有限公司 | USB type computer watchdog apparatus and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: Hangzhou City, Zhejiang Province, 310000 Binjiang District West Road No. 625 New Street Patentee after: ZHEJIANG HEREN TECHNOLOGY Co.,Ltd. Address before: Hangzhou City, Zhejiang province 310053 Binjiang District Dongxin Road No. 66 building E Room 302 Patentee before: ZHEJIANG HEREN TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140709 |