Circuit for automatically configuring FCT test board card bus address

Abstract

The utility model belongs to the integrated circuit technology, and relates to a circuit for automatically configuring FCT test board card bus addresses, which comprises a test board card connected with a main control board through standard interfaces, each standard interface is provided with a single-pole double-throw relay, a fixed contact of a first board card relay is connected with a control signal output end of the main control board, and a fixed contact of a second board card relay is connected with a control signal output end of the main control board. The fixed contacts of other board card relays are connected with one movable contact of the previous board card relay, the other movable contact of all board cards is the level detection end of the current board card, and the fixed contact of each board card relay is defaulted to be connected with the movable contact at the level detection end; and when the current board card completes address configuration, the fixed contact is switched to be connected with the other movable contact. According to the utility model, the address configuration of all the test board cards can be completed by sending only one piece of control information on the main control board card, so that a lot of time is saved during debugging, and the debugging efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of integrated circuit technology, more particularly to a kind of circuit of automatic configuration FCT test board card bus address. BACKGROUND

[0002] In modern manufacturing industry, functional test (Functional Circuit Test, referred to as FCT) is one of the key links to ensure product quality and reliability. FCT test system verifies whether the product meets the design specification and functional requirements by testing the electrical performance of the finished product. In order to meet the diversified testing needs of different products, FCT test system usually needs to integrate multiple different types of test board cards to cover various test items and functions. With the increasing complexity of electronic products, a single test board card is often difficult to meet the comprehensive testing needs. Therefore, FCT test system usually has multiple test board cards with different functions to achieve comprehensive detection of products.

[0003] Currently, the test board cards on the market are mostly used for communication through RS485 or other buses when multiple cards are combined. However, the address of each card needs to be manually set, either by manually setting the address through a code switch or by separately setting it using USB or other communication methods. It cannot be automatically set on the bus. UTILITY MODEL CONTENT

[0004] In order to automatically configure the card address and save time and improve debugging efficiency during debugging, the utility model provides a kind of circuit for automatically configuring FCT test board card bus address. The test board card is connected to the main control board through a standard interface. Each standard interface is configured with a single-pole double-throw relay. The fixed contact of the first card relay is connected to the main control board control signal output end, and the fixed contact of the other card relay is connected to one of the moving contacts of the previous card relay. The other moving contact of all card relays is the current card level detection end. By default, the fixed contact of each card relay is connected to the moving contact of its level detection end. When the current card completes address configuration, the fixed contact is switched to connect to another moving contact.

[0005] Further, the relay includes five pins, pin 4 is used to power the relay, pin 3 is used to control whether pin 5 of the relay is connected to pin 1 or pin 2, pin 1, pin 2 and pin 5 are switchable pins, one end of pin 1 of the current relay is fixedly connected to one end of pin 5 of the next level relay, one end of pin 2 of the current relay is fixedly connected to the level detection end of the current card, and pin 5 of the first level is fixedly connected to the level output end of the main control board. By default, pin 5 of each card is connected to pin 2.

[0006] Further, when performing address configuration, the level output end of the main control board outputs a high level, the i-th board card detects whether the level of the level detection pin is high, if not, it does not perform address configuration, if yes, it performs address configuration, that is, the address received from the main control board is added by 1, and the address is taken as the electronic address of the i-th board card, after the i-th board card completes address configuration, the address information of the main control board is updated and pin 5 is switched to be connected with pin 1.

[0007] Further, the main control board supplies power for the test board card.

[0008] Further, the main control board sends address information to the test board card through the communication bus.

[0009] Further, the test board card judges whether to perform address configuration through the level of the level detection end, if yes, it receives the address information of the main control board through the communication bus, and adds 1 to the received address as the local address.

[0010] Further, a current limiting resistor is arranged between the relay of each test board card and the level detection pin, that is, one end of the current limiting resistor is connected with one end of pin 2 of the relay and the level detection end, and the other end of the current limiting resistor is grounded.

[0011] The utility model discloses a kind of circuit of automatic configuration FCT test board card bus address, main control board can complete the address configuration of all test board cards by sending only one control information, save many time when debugging, improve the debugging efficiency. DRAWINGS

[0012] Figure 1 It is a kind of circuit structure schematic diagram of automatic configuration FCT test board card bus address of the utility model;

[0013] In Figure 1 , 1 indicates the pin 1 of relay;2 indicates the pin 2 of relay;3 indicates the pin 3 of relay;4 indicates the pin 4 of relay;5 indicates the pin 5 of relay;VCC indicates power supply end;GND indicates ground end. CONCRETE EMBODIMENT

[0014] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the utility model.

[0015] The utility model provides a kind of circuit of automatically configuring FCT test board card bus address, all test board cards are connected with main control board through standard interface, one single pole double throw relay or one analog switch is configured in each standard interface, wherein the level output end of main control board is connected with analog pass, the level output of main control board is connected with the analog switch of next test board or with the level detection pin of current test board by analog switch control, when address configuration is carried out, all analog switches default close the circuit between the level output end of main board card and the level detection port of current test board card, disconnect the circuit between the analog switch of next test board;When current test board card completes address configuration, the passage of current analog switch is switched by relay, i.e. close the circuit between the level output end of main board card and the analog switch of next test board, disconnect the circuit between the level detection port of current test board card.

[0016] As Figure 1 Shown, main control board each standard interface is configured one single pole double throw relay or analog switch, and each board card is connected with main control board standard interface and includes power supply, communication bus, relay control and level detection.

[0017] In the embodiment, take relay as example and show. As Figure 1 , relay in the embodiment has 5 pins, wherein pin 4 is used to power supply for relay, pin 3 is used to control whether the pin 5 of relay is connected with pin 1 or pin 2, pin 1, pin 2 and pin 5 are switchable pins, and one end of pin 1 of current relay is fixedly connected with one end of pin 5 of next level relay, one end of pin 2 of current relay is fixedly connected with level detection end of current board card, pin 5 of first level is fixedly connected with level output end of main control board, and pin 5 of each board card is connected with pin 2 by default.

[0018] Further, when address configuration is carried out, the level output end of main control board outputs high level, whether the level of level detection pin of nth board card is high is detected, if not high level, address configuration is not carried out, when the level input of main control board MUC is high and pin 5 of relay of structure of previous n-1 board cards is communicated with pin 1, the level of level detection pin of nth board card is high only, if high, board card n carries out address configuration, i.e. address received from main control board+1 (address information received by current board card is address information of previous board card, a new address is obtained as the address of current board card by using address information+1, fixed interval or other address interval rules commonly used in the art, and then the address of current board card is stored in main control board MUC, when next board card updates address information, update is carried out on the basis of current address according to the set address update rule), and the address is taken as the electronic of nth board card, when nth board card completes address configuration, update the address information of main control board and switch pin 5 to connect with pin 1.

[0019] For example, a main control board has an address configuration button, the main control board detects the button press, the main control board MCU level output is low, at this time all board card level detection is low level; the main control board MCU sends configuration address instruction to all board cards through the communication bus, and all board card addresses are configured as the specified starting address, for example 0;

[0020] After completing the initial address setting, the main control board outputs high level to the pin 5 of the relay of the board card 1, the board card 1 detects high level at the pin 2 of the relay, the board card 1 enters the address configuration mode, other board cards do not enter the address configuration mode and thus do not react, the board card 1 saves the received address 0+1 of the bus as the self address and switches the relay to the pin 1 and sends the self address 1 to the bus;

[0021] The board card 2 detects high level through the relay pin 2, the board card 2 then enters the address configuration mode, saves the received address 1+1 of the bus as the self address and switches the relay to the pin 1 and sends the self address 2 to the bus;

[0022] Similarly, the board card 3 detects high level through the relay pin 2, the board card 3 then enters the address configuration mode, saves the received address 2+1 of the bus as the self address and switches the relay to the pin 1 and sends the self address 3 to the bus;

[0023] By analogy, after completing the address configuration of all board cards, only the main control board end button needs to be pressed, the main control board MCU sends the end configuration address instruction to all board cards through the communication bus and sets the main board card level output to low level, all board cards switch the relay back to the pin 2.

[0024] In the description of the utility model, it needs to be understood that the orientation or position relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "outer", "front", "central", "both ends" is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0025] In the utility model, unless another definite provision and limitation, the term "installation", "arrangement", "connection", "fixation", "rotation" and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two element inside's intercommunication or two element's mutual action relation, unless another definite limitation, for the ordinary skill in the art, can understand the specific meaning of the above-mentioned term in the utility model according to specific circumstances.

[0026] Although the embodiments of the utility model have been shown and described, it will be appreciated by those of ordinary skill in the art that various changes, modifications, alternatives, and variations can be made thereto without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A circuit for automatically configuring the bus address of an FCT test board, characterized in that, The test board connects to the main control board via a standard interface. Each standard interface is configured with a single-pole double-throw relay. The fixed contact of the first board's relay is connected to the control signal output terminal of the main control board. The fixed contacts of the relays on other boards are connected to a movable contact of the previous board's relay. The other movable contact of all boards is the current board's level detection terminal. By default, the fixed contact of each board's relay is connected to the movable contact of its level detection terminal. When the current board completes address configuration, the connection between the fixed contact and the other movable contact is switched.

2. The circuit for automatically configuring the bus address of an FCT test board according to claim 1, characterized in that, The relay has five pins. Pin 4 is used to power the relay, and pin 3 is used to control whether pin 5 of the relay is connected to pin 1 or pin 2. Pins 1, 2 and 5 are switchable pins. One end of pin 1 of the current relay is fixedly connected to one end of pin 5 of the next level relay, and one end of pin 2 of the current relay is fixedly connected to the level detection terminal of the current board. Pin 5 of the first level is fixedly connected to the level output terminal of the main control board. By default, pin 5 of each board is connected to pin 2.

3. The circuit for automatically configuring the bus address of an FCT test board according to claim 2, characterized in that, During address configuration, the main control board outputs a high level. The i-th board detects whether the level of its detection pin is high. If it is not high, address configuration is not performed; if it is high, address configuration is performed by incrementing the address received from the main control board by 1 and using this address as the address of the i-th board. After the i-th board completes address configuration, it updates the address information of the main control board and switches pin 5 to be connected to pin 1.

4. The circuit for automatically configuring the bus address of an FCT test board according to claim 1, characterized in that, The main control board supplies power to the test board.

5. The circuit for automatically configuring the bus address of an FCT test board according to claim 1, characterized in that, The main control board sends address information to the test board via the communication bus.

6. The circuit for automatically configuring the bus address of an FCT test board according to claim 1, characterized in that, The test board determines whether address configuration is required by detecting the level at the level detection terminal. If address configuration is required, it receives the address information from the main control board through the communication bus and increments the received address by 1 as the local address.

7. A circuit for automatically configuring the bus address of an FCT test board according to claim 1 or 2, characterized in that, Each test board has a current-limiting resistor between its relay and its level detection pin. One end of the current-limiting resistor is connected to one end of pin 2 of the relay and the level detection pin, while the other end of the current-limiting resistor is grounded.

Images