Method for testing input and output interface combined circuit board of certain type limit computer

Abstract

The invention relates to the technical field of equipment circuit board detection, in particular to a method for testing an input and output interface combined circuit board of a certain type limit computer, which comprises the following steps of: designing a special test circuit board, and correctly mounting the input and output interface combined circuit board to be tested on the special test circuit board; the industrial personal computer is respectively connected with the special test circuit board and the input / output interface combined circuit board by using an RS232 serial port cable and an ARINC429 bus cable, and the direct-current power supply is connected with the special test circuit board by using a power line; after the direct-current power supply is powered up, test software on the industrial personal computer is started, items needing to be tested are checked, and the test can be automatically completed by clicking to start the test. By designing a special test circuit board and using an automatic detection means to test the process, time and economic cost are reduced to a great extent; meanwhile, due to the small size, independent testing can be carried out without the whole airborne equipment, the maneuverability is high, and the use scene is wide.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment circuit board detection, in particular to a method for testing a certain type of extreme computer input and output interface combined circuit board. Background Art

[0002] The existing input and output interface combination circuit board is tested by aviation airborne detection equipment adapted for the product. This method has the following disadvantages: (1) The detection items of the aviation airborne detection equipment include all the functions of the product, and the test cycle is long; (2) Once the product fails, the fault point cannot be accurately located due to the cross-linking relationship and feedback between the various circuit boards in the computer. The existing means can only solve this problem by replacing the circuit board, which has too high maintenance costs. In addition, the long supply cycle of the circuit board and the unstable factors will greatly increase the maintenance cycle; (3) The aviation airborne detection equipment can only be powered and collect information through the cable plug, and cannot collect signals and test the circuit boards inside the computer, making troubleshooting difficult. Based on this, the present invention proposes a testing method for the input and output interface combination circuit board, which can be separated from the entire aviation airborne detection equipment and tested separately, has strong mobility, and is widely used. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention proposes a testing method for a certain type of extreme computer input and output interface combination circuit board.

[0004] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0005] A method for testing a certain type of extreme computer input / output interface combination circuit board comprises the following steps:

[0006] Step (1), designing a dedicated test circuit board, and correctly installing the input and output interface combination circuit board to be tested on the dedicated test circuit board;

[0007] Step (2), using an RS232 serial cable and an ARINC429 bus cable to connect the industrial computer to the dedicated test circuit board and the input / output interface combination circuit board respectively, and using a power cord to connect a DC power supply to the dedicated test circuit board;

[0008] Step (3), after the DC power supply is turned on, open the test software on the industrial computer, check the items to be tested, and click Start Test to automatically complete the test. The test items include ARINC429 bus transmission test, ARINC429 bus reception test and analog-to-digital conversion circuit test.

[0009] As a further improvement of the present invention, the dedicated test circuit board includes a power conversion circuit, a relay circuit and an FPGA control module;

[0010] The power conversion circuit is connected to the DC power supply, the relay circuit, the FPGA control module, and the input / output interface combination circuit board, respectively, to convert the +27V voltage of the DC power supply into +5V, ±15V, +10V, and +12V DC power, and supply the +5V and ±15V to the input / output interface combination circuit board, supply the +5V, ±15V, +10V, and +12V to the relay circuit, and supply +5V to the FPGA control module;

[0011] The relay circuit is connected to the FPGA control module and the input / output interface combination circuit board respectively, and is controlled by the FPGA control module to transmit 10 analog voltages to the input / output interface combination circuit board;

[0012] The FPGA control module is connected to the industrial computer via an RS232 serial cable, and is connected to an input / output interface combination circuit board via an SPI interface, an address bus, a data bus, and a control bus.

[0013] As a further improvement of the present invention, the specific steps of the ARINC429 bus transmission test are as follows:

[0014] Step 1: The industrial computer sends instructions to the FPGA control module, so that it configures the 429 bridge chip on the input and output interface combination circuit board according to the SPI protocol through the SPI interface to complete the initialization of the 429 bridge chip;

[0015] Step 2: The industrial computer sends 429 data to the input-output interface combination circuit board through the ARINC429 bus, which is equivalent to sending 429 data to the bridge chip on the input-output interface combination circuit board;

[0016] Step 3: The industrial computer sends instructions to the FPGA control module, so that it reads back the FIFO data of the bridge chip on the input and output interface combination circuit board through the SPI interface according to the SPI protocol;

[0017] Step 4: Based on the readback data, compare the sent and readback data to see if they are consistent, and determine whether the ARINC429 bus receiving function is normal.

[0018] As a further improvement of the present invention, the specific steps of the ARINC429 bus reception test are as follows:

[0019] Step 1: The industrial computer sends instructions to the FPGA control module, so that it configures the 429 bridge chip on the input and output interface combination circuit board through the SPI interface according to the SPI protocol to complete the initialization of the 429 bridge chip;

[0020] Step 2: The industrial computer sends instructions to the FPGA control module, so that it writes the data to be sent to the 429 bridge chip to be sent space on the input and output interface combination circuit board through the SPI interface according to the SPI protocol;

[0021] Step 3: The industrial computer sends a command to the FPGA control module, and the control bus sets the RUN pin of the 429 bridge chip on the input and output interface combination circuit board to high. At the same time, the bridge chip immediately sends 429 data to the ARINC429 bus, and the industrial computer will receive the 429 data.

[0022] Step 4: Based on the read-back 429 data, compare the sent and read-back data to see if they are consistent, and determine whether the ARINC429 bus sending function is normal.

[0023] As a further improvement of the present invention, the specific steps of the analog-to-digital conversion circuit test are as follows:

[0024] Step 1: The industrial computer sends instructions to the FPGA control module, causing it to use the control bus to make the relay circuit output 10 analog input voltages. At the same time, it switches the analog switch of the input / output interface combination circuit board through the address bus, data bus, and control bus. That is, it selects one of the 10 analog input voltages as the input analog voltage of the analog-to-digital conversion circuit.

[0025] Step 2: The industrial computer sends instructions to the FPGA control module, causing it to start the analog-to-digital conversion circuit through the address bus, data bus, and control bus;

[0026] Step 3: The industrial computer sends instructions to the FPGA control module, causing it to read back the analog-to-digital conversion results through the address bus, data bus, and control bus, and determine whether the analog-to-digital conversion is normal based on the returned data.

[0027] The beneficial effects of the present invention are:

[0028] The present invention provides a test method for a certain type of extreme computer input / output interface combination circuit board. By designing a dedicated test circuit board and using automatic detection means during the test process, time and economic costs are greatly reduced. At the same time, due to its small size, it can be separated from the entire onboard equipment for independent testing, thus having strong mobility and a wide range of application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0030] Figure 1 This is a structural diagram of the special test circuit board designed in the present invention;

[0031] Figure 2 This is a test flow chart for the ARINC429 bus in the present invention;

[0032] Figure 3 This is a flow chart of the ARINC429 bus receiving test in the present invention;

[0033] Figure 4 This is a test flow chart of the analog-to-digital conversion circuit in the present invention.

[0034] In the figure: 1. DC power supply; 2. Power conversion circuit; 3. Relay circuit; 4. FPGA control module; 5. Industrial computer; 6. Input and output interface combination circuit board. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0036] A method for testing a certain type of extreme computer input / output interface combination circuit board comprises the following steps:

[0037] Step (1): design a dedicated test circuit board, and correctly install the input / output interface combination circuit board 6 to be tested on the dedicated test circuit board.

[0038] like Figure 1 As shown, the dedicated test circuit board includes a power conversion circuit 2, a relay circuit 3 and an FPGA control module 4.

[0039] Among them, the power conversion circuit 2 is respectively connected to the DC power supply 1, the relay circuit 3, the FPGA control module 4, and the input-output interface combination circuit board 6, so as to convert the +27V voltage of the DC power supply 1 into +5V, ±15V, +10V, and +12V DC power, and supply +5V and ±15V to the input-output interface combination circuit board 6, supply +5V, ±15V, +10V, and +12V to the relay circuit 3, and supply +5V to the FPGA control module 4.

[0040] The relay circuit 3 is connected to the FPGA control module 4 and the input / output interface combination circuit board 6 respectively, and is controlled by the FPGA control module 4 to transmit 10 analog voltages to the input / output interface combination circuit board 6 .

[0041] The FPGA control module 4 is connected to the industrial computer 5 via an RS232 serial cable, and is connected to the input / output interface combination circuit board 6 via an SPI interface, an address bus, a data bus, and a control bus.

[0042] Step (2): Use an RS232 serial cable and an ARINC429 bus cable to connect the industrial computer 5 to the dedicated test circuit board and the input / output interface combination circuit board 6 respectively, and use a power cord to connect the DC power supply 1 to the dedicated test circuit board.

[0043] Step (3), after the DC power supply 1 is powered on, open the test software on the industrial computer 5, check the items to be tested, and click Start Test to automatically complete the test. The test items include ARINC429 bus transmission test, ARINC429 bus reception test and analog-to-digital conversion circuit test.

[0044] More specifically, Figure 2 As shown, the specific steps of the ARINC429 bus transmission test are as follows:

[0045] Step 1: The industrial computer 5 sends a command to the FPGA control module 4, so that it configures the 429 bridge chip on the input and output interface combination circuit board 6 through the SPI interface according to the SPI protocol to complete the initialization of the 429 bridge chip.

[0046] Step 2: The industrial computer 5 sends 429 data to the input-output interface combination circuit board 6 via the ARINC429 bus, which is equivalent to sending the 429 data to the bridge chip on the input-output interface combination circuit board 6.

[0047] Step 3: The industrial computer 5 sends a command to the FPGA control module 4, causing it to read back the FIFO data of the bridge chip on the input / output interface combination circuit board 6 through the SPI interface according to the SPI protocol.

[0048] Step 4: Based on the readback data, compare the sent and readback data to see if they are consistent, and determine whether the ARINC429 bus receiving function is normal.

[0049] More specifically, Figure 3 As shown, the specific steps of ARINC429 bus receiving test are as follows:

[0050] Step 1: The industrial computer 5 sends a command to the FPGA control module 4, so that it configures the 429 bridge chip on the input and output interface combination circuit board 6 through the SPI interface according to the SPI protocol to complete the initialization of the 429 bridge chip.

[0051] Step 2: The industrial computer 5 sends an instruction to the FPGA control module 4, so that it writes the data to be sent to the 429 bridge chip to-be-sent space on the input / output interface combination circuit board 6 through the SPI interface according to the SPI protocol.

[0052] Step 3: The industrial computer 5 sends an instruction to the FPGA control module 4, and the control bus sets the RUN pin of the 429 bridge chip on the input and output interface combination circuit board 6 to a high position. At the same time, the bridge chip immediately sends the 429 data to the ARINC429 bus, and the industrial computer 5 will receive the 429 data.

[0053] Step 4: Based on the read-back 429 data, compare the sent and read-back data to see if they are consistent, and determine whether the ARINC429 bus sending function is normal.

[0054] More specifically, Figure 4 As shown, the specific steps for testing the analog-to-digital conversion circuit are as follows:

[0055] Step 1: The industrial computer 5 sends an instruction to the FPGA control module 4, causing it to make the relay circuit 3 output 10 analog input voltages through the control bus, and at the same time switch the analog switch of the input and output interface combination circuit board 6 through the address bus, data bus and control bus, that is, select one of the 10 analog input voltages as the input analog voltage of the analog-to-digital conversion circuit.

[0056] Step 2: The industrial computer 5 sends an instruction to the FPGA control module 4, causing it to start the analog-to-digital conversion circuit through the address bus, data bus, and control bus.

[0057] Step 3: The industrial computer 5 sends an instruction to the FPGA control module 4, causing it to read back the analog-to-digital conversion result through the address bus, data bus and control bus, and determine whether the analog-to-digital conversion is normal based on the returned data.

[0058] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and description merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for testing a certain type of extreme computer input and output interface combination circuit board, characterized in that: The following steps are involved: Step (1), designing a dedicated test circuit board, and correctly installing the input and output interface combination circuit board (6) to be tested on the dedicated test circuit board; Step (2), using an RS232 serial cable and an ARINC429 bus cable to connect the industrial computer (5) to the dedicated test circuit board and the input / output interface combination circuit board (6), respectively, and using a power cord to connect the DC power supply (1) to the dedicated test circuit board; Step (3), after the DC power supply (1) is powered on, the test software on the industrial computer (5) is opened, the items to be tested are checked, and the test is automatically completed by clicking Start Test. The test items include ARINC429 bus transmission test, ARINC429 bus reception test and analog-to-digital conversion circuit test.

2. The method for testing a certain type of extreme computer input / output interface combination circuit board according to claim 1, characterized in that: The dedicated test circuit board includes a power conversion circuit (2), a relay circuit (3) and an FPGA control module (4); The power conversion circuit (2) is connected to the DC power supply (1), the relay circuit (3), the FPGA control module (4), and the input / output interface combination circuit board (6) respectively, and is used to convert the +27V voltage of the DC power supply (1) into +5V, ±15V, +10V, and +12V DC power, and supply the +5V and ±15V to the input / output interface combination circuit board (6), supply the +5V, ±15V, +10V, and +12V to the relay circuit (3), and supply the +5V to the FPGA control module (4); The relay circuit (3) is connected to the FPGA control module (4) and the input / output interface combined circuit board (6) respectively, and is controlled by the FPGA control module (4) to transmit 10 analog voltages to the input / output interface combined circuit board (6); The FPGA control module (4) is connected to the industrial control computer (5) via an RS232 serial cable, and is connected to an input / output interface combination circuit board (6) via an SPI interface, an address bus, a data bus, and a control bus.

3. The method for testing a certain type of extreme computer input / output interface combination circuit board according to claim 1, characterized in that: The specific steps for the ARINC429 bus transmission test are as follows: Step 1: The industrial computer (5) sends a command to the FPGA control module (4), so that it configures the 429 bridge chip on the input and output interface combination circuit board (6) according to the SPI protocol through the SPI interface, thereby completing the initialization of the 429 bridge chip; Step 2: The industrial computer (5) sends 429 data to the input / output interface combination circuit board (6) via the ARINC429 bus, which is equivalent to sending the 429 data to the bridge chip on the input / output interface combination circuit board (6); Step 3: The industrial control computer (5) sends a command to the FPGA control module (4), so that it reads back the FIFO data of the bridge chip on the input and output interface combination circuit board (6) through the SPI interface according to the SPI protocol; Step 4: Based on the readback data, compare the sent and readback data to see if they are consistent, and determine whether the ARINC429 bus receiving function is normal.

4. The method for testing a certain type of extreme computer input / output interface combination circuit board according to claim 1, characterized in that: The specific steps for ARINC429 bus reception test are as follows: Step 1: The industrial computer (5) sends a command to the FPGA control module (4), so that it configures the 429 bridge chip on the input and output interface combination circuit board (6) according to the SPI protocol through the SPI interface, thereby completing the initialization of the 429 bridge chip; Step 2: The industrial computer (5) sends a command to the FPGA control module (4), so that the FPGA control module (4) writes the data to be sent to the 429 bridge chip to-be-sent space on the input / output interface combination circuit board (6) through the SPI interface according to the SPI protocol; Step 3: The industrial computer (5) sends a command to the FPGA control module (4), and the control bus sets the RUN pin of the 429 bridge chip on the input / output interface combination circuit board (6) to a high level. At the same time, the bridge chip immediately sends 429 data to the ARINC429 bus, and the industrial computer (5) will receive the 429 data. Step 4: Based on the read-back 429 data, compare the sent and read-back data to see if they are consistent, and determine whether the ARINC429 bus sending function is normal.

5. The method for testing a certain type of extreme computer input / output interface combination circuit board according to claim 1, characterized in that: The specific steps for testing the analog-to-digital conversion circuit are as follows: The first step: the industrial control computer (5) sends a command to the FPGA control module (4), causing the relay circuit (3) to output 10 analog input voltages through the control bus, and at the same time causing the analog switch of the input / output interface combination circuit board (6) to be switched through the address bus, the data bus, and the control bus, i.e., one of the 10 analog input voltages is selected as the input analog voltage of the analog-to-digital conversion circuit; Step 2: The industrial computer (5) sends an instruction to the FPGA control module (4) to start the analog-to-digital conversion circuit through the address bus, data bus and control bus; Step 3: The industrial computer (5) sends a command to the FPGA control module (4), causing it to read back the analog-to-digital conversion result through the address bus, data bus and control bus, and judge whether the analog-to-digital conversion is normal based on the returned data.

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