CN212061140U - Device for monitoring real-time running state of equipment by using USB interface - Google Patents

Abstract

The utility model relates to a device for monitoring the real-time running state of equipment by utilizing a USB interface, which comprises N groups of USB monitoring circuits; each group of USB monitoring circuits are connected in parallel; each group of USB monitoring circuits comprises a core circuit, and a Type-A USB2.0 interface and a Micro _ USB2.0 interface which are connected with the core circuit; the Type-A USB2.0 interface is also connected with the equipment to be detected; the Micro _ USB2.0 interface is also connected with an external PC; the core circuit comprises a USB2.0 Switch chip and an indicator light display circuit; the USB2.0 Switch chip is connected with the equipment to be detected through a Type-A USB2.0 interface, the D +/D-pin level state of the USB2.0 Switch chip is detected, and when the equipment to be detected detects that D +/D-is high, the testing mode is entered; the USB2.0 Switch chip is connected with the indicator light display circuit and displays different test states of the equipment to be tested; the USB2.0 Switch chip is connected with the PC through a Micro _ USB2.0 interface and used for printing the log of the device to be detected through the PC. The invention does not need to add an additional debugging interface, thereby improving the convenience of the test of the electronic equipment.

Description

Device for monitoring real-time running state of equipment by using USB interface

Technical Field

The utility model relates to a power electronics detects technical field, especially an utilize device of real-time running state of USB interface monitoring facilities.

Background

In the process of developing an electronic product, developers often need to perform long-time pressure tests on the electronic product, such as placing the electronic product in an incubator for high and low temperature tests, so as to check the stability of the equipment in long-time operation. Therefore, real-time monitoring and abnormal diagnosis of the equipment state are key guarantees for stable operation of the inspection equipment. According to the existing monitoring technical scheme, a test result is generally visually observed through an indicating lamp or a display screen arranged in the equipment, or the testing result is connected to a PC (personal computer) end/upper computer through a serial port of the equipment, debugging information is printed out, a debugging command is input, and then the result is analyzed.

In the incubator environment, it is generally difficult for developers to directly observe the status of the indicator lights or the display information of the display screen built in the device, and even some product schemes do not have built-in indicator lights and display screens for cost saving or display requirements. Moreover, a developer debugs the equipment through a serial port, generally needs to manually input a test command to run a program and print debugging information, so that the development efficiency is reduced; or additional development of PC end/upper computer end test software is needed, which unintentionally increases development time and cost; furthermore, many embedded products pursue indexes such as volume and weight, serial ports may be removed from hardware, and related abnormal troubleshooting cannot be performed, which brings great inconvenience to development and debugging of equipment.

Disclosure of Invention

In view of this, for solving the problem that the product test is not convenient for because of not having built-in pilot lamp, display screen and serial ports before current electronic equipment leaves the factory, the utility model provides an utilize device of real-time running state of USB interface monitoring facilities need not increase extra debugging interface, has improved the convenience of electronic equipment test.

The utility model discloses a following scheme realizes: a device for monitoring the real-time running state of equipment by using a USB interface comprises N groups of USB monitoring circuits; each group of USB monitoring circuits are connected in parallel; each group of USB monitoring circuits comprises a core circuit, a Type-A USB2.0 interface and a Micro _ USB2.0 interface; the core circuit is respectively connected with the Type-A USB2.0 interface and the Micro _ USB2.0 interface; the Type-A USB2.0 interface is also connected with equipment to be detected; the Micro _ USB2.0 interface is also connected with an external PC; the core circuit comprises a USB2.0 Switch chip, a first indicator light display circuit and a second indicator light display circuit; the USB2.0 Switch chip is connected with the equipment to be detected through the Type-A USB2.0 interface; the USB2.0 Switch chip is connected with a PC through the Micro _ USB2.0 interface and used for printing a log of the device to be detected through the PC; the USB2.0 Switch chip is connected with the first indicator light display circuit and used for displaying different test states of the device to be tested; the second indicator light display circuit is respectively connected with the USB2.0 Switch chip and the Micro _ USB2.0 interface, and is used for displaying whether the USB2.0 Switch chip is switched to a passage of the Micro USB2.0 interface.

Further, the USB2.0 Switch chip comprises a one-way input D +/D-, two-way output D1+/D1-, and D2 +/D2-and an output path switching control pin S; the D +/D-of the input end of the USB2.0 Switch chip is connected with the D +/D-of the equipment to be detected through the Type-A USB2.0 interface; one output D1 +/D1-of the USB2.0 Switch chip is connected with a PC through a Micro _ USB2.0 interface and used for printing the log of the equipment to be detected through the PC; the other path of output of the USB2.0 Switch chip is a D2 +/D2-short circuit, the state of D2 +/D2-input level is default to be high level, the device to be detected is used for judging whether to be connected to a monitoring device or not after being connected to the Type-A USB2.0 interface, when the device to be detected detects that D +/D-is high, namely the high level of D2 +/D2-input is detected, the device to be detected is connected to the monitoring device and enters a test mode, otherwise, the device to be detected is not connected to the monitoring device and does not enter the test mode; the other path of output D2 +/D2-of the USB2.0 Switch chip is short-circuited and then is connected with the first indicator lamp display circuit, the display state of the indicator lamp in the first indicator lamp display circuit is controlled through the output level state of D2 +/D2-to display different test states of the device to be tested, when D2 +/D2-outputs a high level, the indicator lamp in the first indicator lamp display circuit is turned on, and when D2 +/D2-outputs a low level, the indicator lamp in the first indicator lamp display circuit is turned off; after the S pin of the USB2.0 Switch chip is connected with the second indicator light display circuit, the S pin is connected with the Micro _ USB2.0 interface to control whether the output end of the USB2.0 Switch chip is a D1 +/D1-pin or a D2 +/D2-pin according to the level state of the S pin, when the S pin is at a low level, namely the output end of the USB2.0 Switch chip is a D1 +/D1-pin, namely the USB2.0 Switch chip is switched to the passage of the Micro USB2.0 interface, the indicator light in the second indicator light display circuit is on to indicate that the device to be detected is connected with a PC, otherwise, when the S pin is at a high level, namely the output end of the USB2.0 Switch chip is a D2 +/D2-pin, namely the USB2.0 Switch chip is switched to the passage of the first indicator light display circuit, the indicator light in the second indicator light display circuit is turned off, indicating that the equipment to be detected is not connected to the PC, but is connected to the monitoring device and enters a test mode.

Further, the chip model adopted by the USB2.0 Switch chip is FSUSB30 MUX.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model does not need to add extra debugging interfaces, thus improving the convenience of testing the electronic equipment; the running states of a plurality of electronic devices can be monitored simultaneously, whether the electronic devices are in an abnormal running state or not can be judged visually through the states of the indicating lamps, and automatic abnormal debugging is realized; compared with the traditional serial port, the PC end is connected with the USB interface to carry out USB debugging, and can print out abnormal debugging information so as to further diagnose the abnormal problem and improve the development and debugging efficiency.

Drawings

Fig. 1 is a block diagram of a USB monitoring device according to an embodiment of the present invention.

Fig. 2 is a schematic block diagram of a USB monitoring circuit according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a USB monitoring circuit according to an embodiment of the present invention.

Fig. 4 is a flowchart of an embodiment of the present invention.

Detailed Description

The present invention will be further explained with reference to the drawings and the embodiments.

As shown in fig. 1, the present embodiment provides an apparatus for monitoring a real-time operation state of a device by using a USB interface, including N sets of USB monitoring circuits; 1 < = N < = 8; each group of USB monitoring circuits are connected in parallel; each group of USB monitoring circuits comprises a core circuit, a Type-A USB2.0 interface and a Micro _ USB2.0 interface; the core circuit is respectively connected with the Type-A USB2.0 interface and the Micro _ USB2.0 interface; the Type-A USB2.0 interface is also connected with equipment to be detected; the Micro _ USB2.0 interface is also connected with an external PC; the core circuit comprises a USB2.0 Switch chip, a first indicator light display circuit and a second indicator light display circuit; the USB2.0 Switch chip is connected with the equipment to be detected through the Type-A USB2.0 interface; the USB2.0 Switch chip is connected with a PC through the Micro _ USB2.0 interface and used for printing a log of the device to be detected through the PC; the USB2.0 Switch chip is connected with the first indicator light display circuit and used for displaying different test states of the device to be tested; the second indicator light display circuit is respectively connected with the USB2.0 Switch chip and the Micro _ USB2.0 interface, and is used for displaying whether the USB2.0 Switch chip is switched to a passage of the Micro USB2.0 interface.

In this embodiment, the USB2.0 Switch chip includes a one-input D +/D-, two-output D1+/D1-, and D2+/D2-, and an output path switching control pin S; the D +/D-of the input end of the USB2.0 Switch chip is connected with the D +/D-of the equipment to be detected through the Type-A USB2.0 interface; one output D1 +/D1-of the USB2.0 Switch chip is connected with a PC through a Micro _ USB2.0 interface and used for printing the log of the equipment to be detected through the PC; the other path of output of the USB2.0 Switch chip is a D2 +/D2-short circuit, the state of D2 +/D2-input level is default to be high level, the device to be detected is used for judging whether to be connected to a monitoring device or not after being connected to the Type-A USB2.0 interface, when the device to be detected detects that D +/D-is high, namely the high level of D2 +/D2-input is detected, the device to be detected is connected to the monitoring device and enters a test mode, otherwise, the device to be detected is not connected to the monitoring device and does not enter the test mode; the other path of output D2 +/D2-of the USB2.0 Switch chip is short-circuited and then is connected with the first indicator lamp display circuit, the display state of the indicator lamp in the first indicator lamp display circuit is controlled through the output level state of D2 +/D2-to display different test states of the device to be tested, when D2 +/D2-outputs a high level, the indicator lamp in the first indicator lamp display circuit is turned on, and when D2 +/D2-outputs a low level, the indicator lamp in the first indicator lamp display circuit is turned off; d2 +/D2-output levels are different in height and duration, and further the times and time intervals of turning on and off of the indicator lamps in the first indicator lamp display circuit are different, so that the first indicator lamp display circuit corresponds to different test states; the S pin of the USB2.0 Switch chip is connected with a second indicator light display circuit and then connected to a Micro _ USB2.0 interface so as to control whether the output end of the USB2.0 Switch chip is a D1 +/D1-pin or a D2 +/D2-pin according to the level state of the S pin, the second indicator light display circuit is used for displaying whether the output end of the USB2.0 Switch chip is switched to the D1 +/D1-pin or not, further displaying whether the USB2.0 Switch chip is switched to a passage of the Micro USB2.0 interface or not, and further displaying whether equipment to be detected is connected to a PC; when the S pin is at a low level, that is, the output end of the USB2.0 Switch chip is a D1 +/D1-pin, that is, the USB2.0 Switch chip is switched to a path of a Micro USB2.0 interface, an indicator lamp in the second indicator lamp display circuit is on, indicating that the device to be tested is connected to the PC, otherwise, when the S pin is at a high level, that is, the output end of the USB2.0 Switch chip is a D2 +/D2-pin, that is, the USB2.0 Switch chip is switched to a path of the first indicator lamp display circuit, the indicator lamp in the second indicator lamp display circuit is off, indicating that the device to be tested is not connected to the PC but connected to the monitoring device, and entering a test mode.

In this embodiment, the chip model adopted by the USB2.0 Switch chip is FSUSB30 MUX.

Preferably, the embodiment further provides a working method of the apparatus for monitoring the real-time running state of the device by using the USB interface, according to the USB2.0 specification, the USB device to be detected is generally determined whether to be connected to the USB Host or the USB charger by detecting whether the VBUS of the USB cable is high; on the basis, the embodiment adds a process for judging whether to connect the monitoring device; the method comprises the following steps:

step S1: inserting the equipment to be detected into the Type-A USB2.0 interface, and supplying power to the equipment to be detected through VBUS 5V;

step S2: when the device to be detected detects that the VBUS wire is high, the device to be detected initializes a USB controller and a PHY (port physical layer) and enables USB connection; according to the USB2.0 protocol specification, if the equipment to be detected is High-speed or Full-speed, the D + pin of the equipment is pulled up, and if the equipment to be detected is Low-speed, the D-pin of the equipment is pulled up, and then a reset signal of the USB HOST is waited;

step S3: the device to be detected judges whether the reset signal of the USB HOST is overtime or not, if not, the device to be detected detects the reset signal within the time specified by the USB protocol, which indicates that the device to be detected is normally connected to the USB HOST, and then enters a normal USB enumeration process according to the USB2.0 protocol specification without executing the rest steps; otherwise, waiting for the reset signal of the USB HOST to be overtime, further judging whether the D +/D-level states of the equipment to be detected are all high, if not, indicating that the equipment to be detected is not connected to the monitoring device, closing the USB controller and the PHY, entering a charging mode, and not executing the rest steps; otherwise, the D +/D-is high, which indicates that the equipment is connected to the monitoring device, namely the D +/D-of the equipment is communicated with an output end D2 +/D2-pin of a USB2.0 Switch chip in the monitoring device, then the equipment enters a normal test mode, the level state of the D +/D-is controlled through a USB controller and a PHY, further the level state of the output end D2 +/D2-of the USB2.0 Switch chip in the monitoring device is controlled, and then an indicator lamp in a first indicator lamp display circuit enters a first flashing state;

step S4: the equipment to be detected judges whether the test time is up, if so, the D +/D-level state is controlled through the USB controller and the PHY, the D2 +/D2-level state of the output end of the USB2.0 Switch chip in the monitoring device is further controlled, an indicator lamp in the first indicator lamp display circuit enters a second flashing state, and the detection is finished; otherwise, judging whether the equipment to be detected is abnormal or not, if so, entering an abnormal test mode, controlling the D +/D-level state through the USB controller and the PHY, further controlling the level state of the output end D2 +/D2-of the USB2.0 Switch chip in the monitoring device, and enabling an indicator lamp in the first indicator lamp display circuit to enter a third flashing state; otherwise, the test time is not reached and the abnormality is not detected, and the normal test mode is continuously circulated;

step S5: when the equipment to be detected enters an abnormal test mode process, judging whether D +/D-of the equipment is in a short circuit state or not, if so, indicating that the output end of a USB2.0 Switch chip in the monitoring device is still at a D2 +/D2-pin, circulating the abnormal test mode, and setting an indicator lamp in a first indicator lamp display circuit to continuously display a third flashing state; otherwise, detecting that the D +/D-of the equipment is not short-circuited, indicating that the output end of the USB2.0 Switch chip in the monitoring device is switched to a pin D1 +/D1-to represent that the equipment is switched to a Micro _ USB2.0 interface connected with a PC USB Host, exiting the test mode, entering a normal USB enumeration process according to the USB2.0 protocol specification, and after the PC end identifies the USB equipment to be detected, printing the log of the equipment to be detected by using a PC through the USB debugging function of the Micro _ USB2.0 interface so as to further locate the abnormal problem.

Preferably, this embodiment includes N sets of USB monitoring circuits, and each set of USB monitoring circuit is the same, and can carry out real-time monitoring to the running state of N devices to be detected simultaneously. Each group of USB monitoring circuits comprises a core circuit, a Type-A USB2.0 interface and a Micro _ USB2.0 interface. The Type-A USB2.0 interface is used for connecting the equipment to be detected; the Micro _ USB2.0 interface is used for connecting a PC; the core circuit contains FSUSB30MUX chip and corresponding pilot lamp display circuit, and FSUSB30MUX chip is used for switching pilot lamp circuit and Micro _ USB2.0 interface circuit dynamically. The indicator light is used for displaying the real-time running state of the equipment to be detected.

The device to be detected has several states as follows:

1. connecting the PC and entering a normal enumeration process. This process, different USB devices are implemented according to the USB protocol specification, and are standard.

2. Connecting the monitoring device and entering a test mode. The test mode itself is not limited to testing connections of the USB, but includes testing all modules of the device under test. When all the equipment modules are detected to be normal, the test mode is called a normal test mode. Otherwise, if the module is abnormal, the test mode is called as an abnormal test mode; when entering the abnormal test mode, the normal USB enumeration process can still be executed, and the purpose is to connect to a PC through a USB, print a log and further diagnose an abnormal module. Print logs are a common expression of debug log output.

It should be noted that, in general, only when the indicator light of the device to be tested is abnormal, the Micro _ USB2.0 interface is required to be used for connecting the PC USB Host, enter the USB for debugging, and print out the debugging information. A special connection mode is that the Type-A USB2.0 interface of the device is connected with the equipment to be detected, meanwhile, the Micro USB2.0 interface of the device is connected with the PC USB Host, and then according to the description of the steps S1-S3, the equipment to be detected enters a normal USB enumeration process instead of a test mode.

Preferably, in this embodiment, the functional block diagram of the USB monitoring circuit of each group is shown in fig. 2, and the core component is an FSUSB30MUX chip, which is a bidirectional low-power-consumption dual-port high-speed USB2.0 switch and has a structure similar to a double-pole double-throw switch. As shown in FIG. 3, when the S pin is low, the D +/D-pin turns on HSD1+/HSD1-, and when the S pin is high, the D +/D-pin turns on HSD2+/HSD 2-. And corresponding indicator lights and control circuits are designed on the periphery of the chip and are used for matching with a software monitoring program to detect the running state of the electronic equipment in real time. The state of the indicator light is used for visually displaying whether the electronic equipment to be detected is in a normal or abnormal test state.

Preferably, in this embodiment, as shown in FIG. 3, the input terminal D +/D-pin of the FSUSB30MUX chip is connected to the D +/D-pin of the Type-A USB interface for reflecting the level state of the D +/D-pin of the device under test by the level state of the input terminal D +/D-pin of the FSUSB30MUX chip. Preferably, in the embodiment, the software monitoring program flow chart is as shown in fig. 4 below, after the electronic device to be tested is inserted into the Type-a interface of the device, the USB monitoring device supplies power to the electronic device to be tested through VBUS 5V. When the electronic device to be tested detects that the VBUS line is High, the USB controller and the PHY are initialized, USB connection is enabled, if the device is High-speed or Full-speed, the D + is pulled up, and if the device is Low-speed, the D-is pulled up, and then a reset signal of the USB HOST is waited. If a reset signal is detected within the time specified by the USB protocol, which indicates that the device is normally connected to HOST, then a normal USB enumeration process is entered. If the waiting reset signal is overtime, further detecting the level states of the D + pin and the D-pin, if the waiting reset signal is not high, indicating that the equipment is not connected to the monitoring device, closing the USB controller and the PHY, and entering a charging mode; if both are high, indicating connection to the monitoring device, then normal test mode is entered, the USB controller and PHY begin controlling the D +/D-level state, and the LED1 light of FIG. 3 is set to enter the first blink state 1. If no equipment abnormality is detected, the detection is finished when the test time is up, and the LED1 lamp is set to enter a second flashing state 2. If the device is detected to be abnormal, an abnormal test mode is entered, the USB controller and the PHY control the D +/D-level, and the LED1 lamp in FIG. 3 is set to be in a third flashing state 3. After entering an abnormal test mode, polling to check whether D +/D-is in a short circuit state, and if the D +/D-is in the short circuit state, circulating the abnormal test mode; otherwise, the test mode is exited, a normal USB enumeration process is entered, and after the device to be tested is normally connected to the USB Host, the device log can be printed out through a USB debugging function, such as a USB ADB, so as to further locate the abnormal problem. In fig. 3, the LED2 is the only path used to show whether the device is switched to the Micro USB2.0 interface. When switched to the Micro USB2.0 interface channel, the LED2 is illuminated.

Preferably, the device of this embodiment includes a plurality of sets of USB monitoring circuits, and each set of USB monitoring circuit can independently execute the detection process shown in fig. 4, so as to realize real-time testing of the operating status of a plurality of devices to be detected. Once the test of a certain device is found to be abnormal, the corresponding abnormal indicator lamp is turned on, and the corresponding abnormal indicator lamp can be connected with a PC through a Micro USB2.0 interface to enter a USB debugging mode, and a monitoring log of the device is printed out. Developers can analyze the log to further diagnose or locate abnormal problems. The method for monitoring the running state of the electronic equipment provides a quick and convenient running state monitoring method for the electronic equipment, particularly the electronic equipment without a built-in indicator lamp, a display screen or a removed serial port. It is worth mentioning that the utility model protects a hardware structure, as for the control method does not require protection. The above is only a preferred embodiment of the present invention. However, the present invention is not limited to the above embodiments, and any equivalent changes and modifications made according to the present invention do not exceed the scope of the present invention, and all belong to the protection scope of the present invention.

Claims (3)

1. The utility model provides an utilize device of real-time running state of USB interface monitoring equipment which characterized in that: the monitoring circuit comprises N groups of USB monitoring circuits; each group of USB monitoring circuits are connected in parallel; each group of USB monitoring circuits comprises a core circuit, a Type-A USB2.0 interface and a Micro _ USB2.0 interface; the core circuit is respectively connected with the Type-A USB2.0 interface and the Micro _ USB2.0 interface; the Type-A USB2.0 interface is also connected with equipment to be detected; the Micro _ USB2.0 interface is also connected with an external PC; the core circuit comprises a USB2.0 Switch chip, a first indicator light display circuit and a second indicator light display circuit; the USB2.0 Switch chip is connected with the equipment to be detected through the Type-A USB2.0 interface; the USB2.0 Switch chip is connected with a PC through the Micro _ USB2.0 interface and used for printing a log of the device to be detected through the PC; the USB2.0 Switch chip is connected with the first indicator light display circuit and used for displaying different test states of the device to be tested; the second indicator light display circuit is respectively connected with the USB2.0 Switch chip and the Micro _ USB2.0 interface, and is used for displaying whether the USB2.0 Switch chip is switched to a passage of the Micro USB2.0 interface.

2. The device for monitoring the real-time running state of equipment by using the USB interface according to claim 1, wherein: the USB2.0 Switch chip comprises a path of input D +/D-, a path of output D1+/D1-, a path of output D2 +/D2-and an output path switching control pin S; the D +/D-of the input end of the USB2.0 Switch chip is connected with the D +/D-of the equipment to be detected through the Type-A USB2.0 interface; one output D1 +/D1-of the USB2.0 Switch chip is connected with a PC through a Micro _ USB2.0 interface and used for printing the log of the equipment to be detected through the PC; the other path of the USB2.0 Switch chip outputs a D2 +/D2-short circuit, and the state of the D2 +/D2-input level is default to be a high level, so that whether the device to be detected is connected to a monitoring device or not is judged after the device to be detected is connected to the Type-A USB2.0 interface; the other path of output D2 +/D2-of the USB2.0 Switch chip is short-circuited and then is also connected with the first indicator light display circuit, and the display state of the indicator light in the first indicator light display circuit is controlled through the output level state of D2 +/D2-so as to display different test states of the equipment to be tested; and after the S pin of the USB2.0 Switch chip is connected with the second indicator light display circuit, the S pin is connected with the Micro _ USB2.0 interface so as to control whether the output end of the USB2.0 Switch chip is a D1 +/D1-pin or a D2 +/D2-pin according to the level state of the S pin.

3. The device for monitoring the real-time running state of equipment by using the USB interface according to claim 1, wherein: the chip model adopted by the USB2.0 Switch chip is FSUSB30 MUX.

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