CN213122145U

CN213122145U - 5G module product GPIO mouth test circuit

Info

Publication number: CN213122145U
Application number: CN202021806187.1U
Authority: CN
Inventors: 程明军
Original assignee: Shenzhen Qikai Electronic Co ltd
Current assignee: Shenzhen Qikai Electronic Co ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-05-04
Anticipated expiration: 2030-08-25

Abstract

The utility model provides a 5G module product GPIO mouth test circuit belongs to 5G module test field. The utility model discloses a first switch module, second switch module, the 5G module product that awaits measuring are equipped with first test pin and second test pin, first switch module's control end links to each other with first test pin, first switch module's one end links to each other with the power, and the other end links to each other with second switch module's one end, and second switch module's another termination power ground, second switch module's controller links to each other with second test pin, all GPIO mouths of 5G module product connect in parallel between first switch module and second switch module. The utility model has the advantages that: the testing efficiency is extremely high; the test effect is good, and the function coverage is complete.

Description

5G module product GPIO mouth test circuit

Technical Field

The utility model relates to a 5G module test technique especially relates to a 5G module product GPIO mouth test circuit.

Background

As the 5G intelligent universal module has more pins and large module size, once a client finds that the module is bad after being produced and attached to a product, the module is difficult to disassemble and maintain, and therefore, the function of each functional pin in the factory state of the module is ensured to be normal.

Then, the module is provided with more than 30 GPIO ports, and the production test cannot be carried out in a mode of judging the normal pins of the module in a traditional pin testing function mode, so that the traditional testing mode is adopted to carry out one-to-one test, the realization is difficult, and the testing efficiency is very low.

SUMMERY OF THE UTILITY MODEL

For the problem of the inconvenient test of 5G module GPIO mouth among the solution prior art, the utility model provides a 5G module product GPIO mouth test circuit.

The utility model discloses a first switch module, second switch module, the 5G module product that awaits measuring are equipped with first test pin and second test pin, first switch module's control end links to each other with first test pin, first switch module's one end links to each other with the power, and the other end links to each other with second switch module's one end, and second switch module's another termination power ground, second switch module's controller links to each other with second test pin, all GPIO mouths of 5G module product connect in parallel between first switch module and second switch module.

The utility model discloses do further improvement, still include test instruction module, 5G module product is equipped with the test instruction pin that is used for self-checking procedure output test result, test instruction module's input links to each other with the instruction pin.

The utility model discloses make further improvement, test indication module is pilot lamp or audible alarm.

The utility model discloses make further improvement, test indication module is the LED lamp more than 1.

The utility model discloses make further improvement, test indication module still includes the current limiting unit who establishes ties with the LED lamp.

The utility model discloses make further improvement, the current limiting unit is current limiting resistor.

The utility model discloses do further improvement, still include the filtering module, the filtering module sets up the concatenation end at all GPIO mouths.

The utility model discloses do further improvement, 5G module product is replaced with the singlechip that can detect 5G module product GPIO mouth high-low level, first test pin, second test pin all set up on the singlechip, the singlechip still links to each other with all GPIO mouths of the 5G module product that awaits measuring respectively.

Compared with the prior art, the beneficial effects of the utility model are that: hardware support is provided for detection of the 5G module, and the problem that a GPIO port of the module is inconvenient to test is solved through low cost; the testing efficiency is extremely high; the test effect is good, and the function coverage is complete.

Drawings

FIG. 1 is a block diagram of the present invention;

fig. 2 is a schematic circuit diagram of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

The utility model discloses combine GPIO mouth function singleness (input/output control) circuit characteristics to the condition that the pin of 5G module product (for short: module) is basically all directly drawn forth is the CPU chip pin, whether module GPIO pin function normally depends on the welding between chip pin and chip and the PCB board to and the PCB board is walked the line. Therefore, the utility model discloses combine 5G module self powerful's characteristics, designed very simple test circuit, can accomplish the test of all GPIO mouths. This will be described in detail below.

As shown in fig. 1, the utility model discloses the 5G module product that awaits measuring is equipped with first test pin and second test pin, 5G module product GPIO mouth test circuit includes first switch module, second switch module, first switch module's control end links to each other with first test pin, first switch module's one end links to each other with the power, and the other end links to each other with second switch module's one end, and second switch module's the other end meets power ground, second switch module's controller links to each other with second test pin, all GPIO mouths of 5G module product connect in parallel between first switch module and second switch module. Still include test instruction module, 5G module product is equipped with the test instruction pin that is used for self-checking procedure output test result, test instruction module's input links to each other with the instruction pin.

As shown in fig. 2, as an embodiment of the present invention, the first switch module and the second switch module of this embodiment are both transistors, and the two test pins CTRL1 and CTRL2 are respectively connected to the bases of the transistors Q1 and Q2 through a resistor. The power supply Vcc is connected to the collector of the transistor Q1 through the resistor R2, the emitter of the transistor Q1 is connected to the collector of the transistor Q2, and the emitter of the transistor Q2 is connected to the power ground.

All functional pins GPIO ports of the 5G module product are connected in parallel with an emitter of the transistor Q1 and a collector of the transistor Q2, and preferably, a grounding capacitor C1 with a function of de-jitter filtering is further connected at the parallel connection end of the GPIO ports. The stability of the test circuit is better. The first switch module and the second switch module in this example may be switching tubes, field effect tubes, or the like.

The test indication module of the embodiment is an LED lamp, the positive electrode of the LED lamp is connected with a test indication pin LEDCTRL, and the negative electrode of the LED lamp is connected with a power ground. In the embodiment, the anode of the LED lamp is also connected in series with a current-limiting resistor R4, and the brightness of the LED lamp can be adjusted by adjusting the resistance value of the current-limiting resistor R4.

The indicating module of this example can also be a plurality of LED lamps to instruct different operating condition, still can be audible and visual indicating module such as audible alarm, buzzer.

As another embodiment of the utility model, the test function of 5G module product of this example is replaced with the singlechip that can detect 5G module product GPIO mouth height level, first test pin, second test pin and test program all set up on the singlechip, the singlechip still links to each other with all GPIO mouths of the 5G module product that awaits measuring respectively through different pins. The level of all GPIO ports of a 5G module product to be tested is tested by arranging the single chip microcomputer, so that whether the GPIO ports are abnormal or not can be judged visually and conveniently. The 5G module product is used, the circuit is simpler, and the cost is lower.

The utility model discloses a theory of operation does:

1. initial state after module power-on: all GPIOs (GPIO _1,2,3,, GPIO _ N) are set to the input (floating state).

2. And (3) testing the input function of the GPIO port: CTRL1 is high; CTRL2 goes low so that transistor Q1 is on and transistor Q2 is off. The Vcc supply voltage is applied to all GPIO ports tested on the module through resistor R2, which should all be pulled high. At this time, the self-checking program in the 5G module product polls all GPIO states once, and all GPIO states are high, and the GPIO pins which are low are abnormal, which is caused by open circuit from the chip pin to the module pin or damage of the CPU chip.

3. And (3) testing the output function of the GPIO port: CTRL1 is low; when CTRL2 goes high, transistor Q1 turns off and transistor Q2 turns on. All GPIO ports under test should be forced low by Q2. At this time, the self-checking program in the 5G module product polls all GPIO states once, all GPIO states are low, and GPIO pins which are high are abnormal, so that the abnormal situation is caused by an open circuit from a chip pin to a module pin or a damaged CPU chip.

4. When the test in the step 2 is abnormal, the 5G module product controls the LED lamp D1 to slowly flash through the LEDCTRL pin to prompt that the self-test fails, and the self-test process is stopped;

when the test in the step 3 is abnormal, the 5G module product controls the LED lamp D1 to flash quickly through the LEDCTRL pin to prompt that the self-checking fails, and the self-checking process is stopped. Of course, this example can indicate two anomalies by providing two different colored LED lights.

5. And when the test result passes, the module system is normally started, and the self-test passing result is recorded in the NV data structure.

Compared with the prior art, the utility model has the advantages of as follows:

1. the structure is simple, the performance is stable, and hardware support is provided for testing all GPIO ports of a 5G module product through very low cost;

2. the test efficiency is extremely high by matching with the self-checking test in the 5G module product;

3. the test effect is good, and the function coverage is complete.

The above-mentioned embodiments are the preferred embodiments of the present invention, and the scope of the present invention is not limited to the above-mentioned embodiments, and the scope of the present invention includes and is not limited to the above-mentioned embodiments, and all equivalent changes made according to the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides a 5G module product GPIO mouth test circuit which characterized in that: including first switch module, second switch module, the 5G module product that awaits measuring is equipped with first test pin and second test pin, first switch module's control end links to each other with first test pin, first switch module's one end links to each other with the power, and the other end links to each other with second switch module's one end, and second switch module's the other end connects power ground, second switch module's controller links to each other with second test pin, all GPIO mouths of 5G module product connect in parallel between first switch module and second switch module.

2. The 5G module product GPIO port test circuit of claim 1, wherein: still include test instruction module, 5G module product is equipped with the test instruction pin that is used for self-checking procedure output test result, test instruction module's input links to each other with the instruction pin.

3. The 5G module product GPIO port test circuit of claim 2, wherein: the test indication module is an indicator light or an audible alarm.

4. The 5G module product GPIO port test circuit of claim 3, wherein: the test indication module is more than 1 LED lamp.

5. The 5G module product GPIO port test circuit of claim 4, wherein: the test indication module further comprises a current limiting unit connected with the LED lamp in series.

6. The 5G module product GPIO port test circuit of claim 5, wherein: the current limiting unit is a current limiting resistor.

7. The 5G module product GPIO port test circuit of claim 1, wherein: the GPIO interface circuit further comprises a filtering module, wherein the filtering module is arranged at the parallel connection end of all GPIO interfaces.

8. The 5G module product GPIO port test circuit of any one of claims 1-7, wherein: the 5G module product is replaced by a single chip microcomputer capable of detecting the high and low levels of GPIO ports of the 5G module product, the first test pin and the second test pin are arranged on the single chip microcomputer, and the single chip microcomputer is connected with all the GPIO ports of the 5G module product to be detected respectively.