CN115079676B - Dual control board (FCT) system and testing method thereof - Google Patents
Dual control board (FCT) system and testing method thereof Download PDFInfo
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- CN115079676B CN115079676B CN202210849766.1A CN202210849766A CN115079676B CN 115079676 B CN115079676 B CN 115079676B CN 202210849766 A CN202210849766 A CN 202210849766A CN 115079676 B CN115079676 B CN 115079676B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
- G05B23/0221—Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2803—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP] by means of functional tests, e.g. logic-circuit-simulation or algorithms therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
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Abstract
The invention relates to the technical field of double-MCU variable frequency plywood PCBA test, and provides a double-control board FCT system and a test method thereof, wherein the system comprises: the intelligent control system comprises a first control board, a second control board, a display board, a special jig, a circuit board, a first micro control unit, a second micro control unit, a relay and an intelligent terminal; the circuit board is arranged on the special jig, the first micro control unit and the second micro control unit are respectively and electrically connected with the circuit board, the first control board is respectively in communication connection with the display board, the intelligent terminal, the first micro control unit and the second control board, the first micro control unit is in communication connection with the second micro control unit, the input loop of the relay is connected with the second control board, and the output loop of the relay is connected with the second micro control unit; the first control board is used for testing the I/O port of the first micro control unit, and the second control board is used for testing the I/O port of the second micro control unit. The invention has high testing efficiency, low cost and wide application range.
Description
Technical Field
The invention relates to the technical field of double-MCU variable frequency plywood PCBA testing, in particular to a double-control board FCT system and a testing method thereof.
Background
Nowadays, the application of intelligent device controllers is more and more popular, and a universal FCT system is also popularized in PCBA production lines. FCT (functional Test) refers to a Test method for providing a simulated operating environment (excitation and load) for a Test target board (UUT: unit Under Test) to enable the Test target board to work in various design states, and thus obtaining parameters of each state to verify the function of the UUT. Simply put, the UUT is loaded with the appropriate stimulus and the output response is measured for compliance.
However, for the frequency conversion plywood with double MCUs, because of many test items, the universal FCT is used, and the disadvantages of slow test speed, long time and low efficiency exist.
Disclosure of Invention
Aiming at the defects of the related technologies, the invention provides a dual-control board FCT system with high PCBA testing efficiency, low cost and good use effect and a testing method thereof.
In order to solve the above technical problem, in a first aspect, an embodiment of the present invention provides a dual control board FCT system, including: the intelligent control system comprises a first control board, a second control board, a display board, a special jig, a circuit board, a first micro control unit, a second micro control unit, a relay and an intelligent terminal; the circuit board is installed on the special jig, the first micro control unit and the second micro control unit are respectively and electrically connected with the circuit board, the first control board is respectively in communication connection with the display board, the intelligent terminal, the first micro control unit and the second control board, the first micro control unit is in communication connection with the second micro control unit, an input loop of the relay is connected with the second control board, and an output loop of the relay is connected with the second micro control unit; the first control board is used for testing the I/O port of the first micro control unit, the second control board is used for testing the I/O port of the second micro control unit, the test result is sent to the first control board after the test is completed, and the first control board receives the test result of the second control board, summarizes the test result with the test result of the first control board and sends the test result to the display board uniformly to display the final test result.
Preferably, the first control board is provided with a first serial port, a second serial port, a third serial port and a fourth serial port, the first serial port is connected with the display panel, the second serial port is connected with the first micro control unit, the third serial port is connected with the second control board, and the fourth serial port is connected with the intelligent terminal.
Preferably, the relay is a time-delay closing relay.
Preferably, the I/O port of the first micro control unit includes an input switch port and an input temperature port; the I/O port of the second micro control unit comprises a PFC switch test port and an IPM test port.
Preferably, the second control board is provided with a fifth serial port, a sixth serial port and a seventh serial port, the fifth serial port is connected with the first control board, the sixth serial port is connected with the output loop of the relay, and the seventh serial port is connected with the input loop of the relay.
Preferably, the circuit board is a PCBA board, the first micro control unit is a first MCU, and the second micro control unit is a second MCU.
In a second aspect, an embodiment of the present invention further provides a testing method for a dual control board FCT system, where the testing method includes the following steps:
s1, pressing a test button;
s2, starting the circuit board to be electrified by a test program of the first control board;
s3, the first control board is in communication connection with a first serial interface of a first micro control unit of the circuit board and used for testing an I/O port of the first micro control unit;
s4, the second serial interface of the first micro control unit of the circuit board is in communication connection with the second micro control unit of the circuit board, and the second micro control unit of the circuit board keeps silent after communication is finished;
s5, the first control board starts a test program of a second control board, the second control board controls an output loop of a relay to be closed, the second control board is in communication connection with the second micro control unit of the circuit board through the sixth serial port, and an I/O port of the second micro control unit starts to be tested;
s6, the first control board receives a test result of the second control board;
s7, summarizing the received test result of the second control board and the test result of the first control board through the first control board, and uniformly sending the test results to a display board;
s8, the display panel displays a final test result;
and S9, controlling the circuit board to be powered off by the first control board test program according to the final test result.
Compared with the prior art, the invention adopts the first control board, the second control board, the display board, the special jig, the circuit board, the first micro control unit, the second micro control unit, the relay and the intelligent terminal; starting a test program of the first control board by pressing a start test switch, wherein the first control board directly communicates with the first micro control unit on the circuit board to start testing and is used for testing functional I/O related to the first micro control unit; the first control board is connected with the second control board, the second control board is started to start testing, and the second control board is communicated with the second micro control unit through the relay and used for testing functional I/O related to the second micro control unit; after the second control board finishes testing, sending a testing result to the first control board, and after the first control board receives the testing result of the second control board and is aggregated with the testing result of the first control board, uniformly sending the display board to display a final testing result, and finishing testing; the double MCUs of the PCBA are butted through the double control boards for testing, and when the PCBA of the double-MCU variable frequency plywood needs to be tested, the double control boards are tested in parallel, so that the testing speed is greatly improved; when the PCBA of the common single MCU needs to be tested, the added control board is removed, and the use of the FCT of the original single control board is not influenced; and a modular structure is adopted, so that the hardware development difficulty is reduced, the development speed is high, the cost is low, and the application range is wide.
Drawings
The present invention is described in detail below with reference to the attached drawings. The foregoing and other aspects of the invention will become more apparent and more readily appreciated from the following detailed description, taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a schematic diagram of the dual control board FCT system of the present invention;
fig. 2 is a flowchart of a testing method of the dual control board FCT system according to the present invention.
In the figure, 1, a first control board, 2, a second control board, 3, a special jig, 4, a first micro-control unit, 5, a second micro-control unit, 6, a circuit board, 7, a relay, 8, a display board, 9, an intelligent terminal, 10, a first serial port, 11, a second serial port, 12, a third serial port, 13, a fourth serial port, 14, a fifth serial port, 15, a sixth serial port, 16 and a seventh serial port.
Detailed Description
The following detailed description of the embodiments of the invention refers to the accompanying drawings.
The embodiments/examples described herein are specific embodiments of the present invention, are intended to be illustrative of the concepts of the present invention, are intended to be illustrative and exemplary, and should not be construed as limiting the embodiments and scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include those which make any obvious replacement or modification of the embodiments described herein, and all of which are within the scope of the present invention.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of a dual control board FCT system according to the present invention.
The present invention provides a dual control board FCT system, comprising: the device comprises a first control board 1, a second control board 2, a display board 8, a special jig 3, a circuit board 6, a first micro control unit 4, a second micro control unit 5, a relay 7 and an intelligent terminal 9; the circuit board 6 is installed on the special jig 3, the first micro control unit 4 and the second micro control unit 5 are respectively and electrically connected with the circuit board 6, the first control board 1 is respectively and communicatively connected with the display board 8, the intelligent terminal 9, the first micro control unit 4 and the second control board 2, the first micro control unit 4 is communicatively connected with the second micro control unit 5, an input loop of the relay 7 is connected with the second control board 2, and an output loop of the relay 7 is connected with the second micro control unit 5; the first control board 1 is used for testing the I/O port of the first micro control unit 4, the second control board 2 is used for testing the I/O port of the second micro control unit 5, and after the testing is completed, the testing result is sent to the first control board 1, the first control board 1 receives the testing result of the second control board 2 and summarizes the testing result with the testing result of the first control board 1, and then the testing result is sent to the display board 8 in a unified mode to display the final testing result, and the testing is finished.
The intelligent terminal 9 may be a computer, a mobile phone, or the like. The display panel 8 may be a liquid crystal display, an LED (Light-Emitting Diode) display, or the like.
Specifically, special tool 3 is used for installing two MCU's circuit board 6, sets up first little the control unit 4 and second little the control unit 5 on circuit board 6, and mutual communication is connected between first little the control unit 4 and the second little the control unit 5. The first control board 1 is connected with the first micro control unit 4 and used for testing an I/O port of the first micro control unit 4. The second control board 2 is connected with the second micro control unit 5 and used for testing an I/O port of the second micro control unit 5. The first control board 1 is in communication connection with the second control board 2, an input loop of the relay 7 is connected with the second control board 2, and an output loop of the relay 7 is connected with the second micro control unit 5. By pressing the start test switch, the test program of the first control board 1 is started, the first control board 1 directly communicates with the first micro control unit 4 on the circuit board 6 and starts the test for testing the function related to the first micro control unit 4; the first control board 1 is connected with the second control board 2, the second control board 2 is started to start testing, and the second control board 2 is communicated with the second micro control unit 5 through the relay 7 and used for testing functions related to the second micro control unit 5; and after the second control board 2 finishes testing, sending a test result to the first control board 1, and after the first control board 1 receives the test result of the second control board 2 and summarizes the test result of the first control board 1 and the test result of the second control board, uniformly sending the display board 8 to display a final test result, and finishing testing. The intelligent terminal 9 is in communication connection with the first control board 1, so that the intelligent terminal 9 can conveniently store and count the controlled test results and form a report. Therefore, the double MCUs of the PCBA are butted for testing through the double control boards, and when the PCBA of the double-MCU variable frequency plywood needs to be tested, the double control boards are tested in parallel, so that the testing speed is greatly improved; when the PCBA of the common single MCU needs to be tested, the added control board can be removed, and the use of the FCT of the original single control board is not influenced; and a modular structure is adopted, so that the hardware development difficulty is reduced, the development speed is high, the cost is low, and the application range is wide.
In this embodiment, the first control board 1 is provided with a first serial port 10, a second serial port 11, a third serial port 12 and a fourth serial port 13, the first serial port 10 is connected to the display board 8, the second serial port 11 is connected to the first micro control unit 4, the third serial port 12 is connected to the second control board 2, and the fourth serial port 13 is connected to the intelligent terminal 9. Through the first serial ports 10, the second serial ports 11, the third serial ports 12 and the fourth serial ports 13 which are respectively arranged on the first control board 1, the first micro control unit 4, the second control board 2 and the intelligent terminal 9 are respectively connected, and mutual data transmission is conveniently carried out.
In this embodiment, the relay 7 is a time-delay closed relay. The time delay relay is mainly used in various protection and automatic control circuits operated by direct current or alternating current, and is used as an auxiliary relay to increase the number of contacts and the capacity of the contacts. The time of the time delay can be freely adjusted according to the requirement.
In this embodiment, the I/O port of the first mcu 4 includes an input switch port and an input temperature port; the I/O port of the second micro control unit 5 includes a PFC switch test port and an IPM test port. The first control board 1 can control the first micro control unit 4 to test the test result obtained by the I/O port of the first control board, the second control board 2 can control the second micro control unit 5 to test the test result obtained by the I/O port of the second control board, and the test result is collected to the display board 8 through the second control board 2 to be displayed.
In this embodiment, a fifth serial port 14, a sixth serial port 15 and a seventh serial port 16 are arranged on the second control board 2, the fifth serial port 14 is connected with the first control board 1, the sixth serial port 15 is connected with an output loop of the relay 7, the seventh serial port 16 is connected with an input loop of the relay 7, and the second control board 2 controls the on-off of the input loop of the relay 7 through the seventh serial port 16, so as to control the on-off of the output loop of the relay 7; the sixth serial port 15 is used for realizing the communication connection between the second control board 2 and the second micro control unit 5 when the output loop of the relay 7 is closed.
In this embodiment, the circuit board 6 is a PCBA board, the first MCU 4 is a first MCU, and the second MCU 5 is a second MCU. Wherein, the first MCU is MCU1, and the second MCU is MCU2.
Specifically, after the PCBA is placed in the special fixture 3, the first control board 1 and the second control board 2 communicate with the PCBA, respectively, and check the temperature, the current, the voltage, the dial switch, the switch port, the phase sequence, the memory, the communication items, the relay, the expansion valve, and the like item by item, and the test result can be inquired on the display board 8.
Specifically, the I/O port of the MCU1 of the first micro control board is tested by the communication between the first control board 1 and the serial1 of the MCU1 of the PCBA, wherein the I/O port comprises a temperature port, a switch port and a memory port. The first control board 1 starts a test program of the second control board 2, the second control board 2 controls the relay 7 to be closed, the sixth serial port 15 of the second control board 2 is communicated with the MCU2 of the PCBA, and an I/O port of the MCU2 starts to be tested, wherein the I/O port comprises a PFC switch test port, an IPM output test port, a short circuit overcurrent test port and an IPM temperature test port. The test result is sent to the first control board 1 through the second control board 2 through the fifth serial port 14, after the test result of the second control board 2 and the test result of the first control board 1 are gathered, the test result and the test result are sent to the display board 8 in a unified mode to display the final test result, and the test is finished. And sending the final test result to the intelligent terminal 9 through the first control board 1 for storage and statistics to form a report.
The specific operation process of the invention is as follows:
And 2, connecting the FCT dual-control board with a power supply.
And 3, turning on a power switch of the FCT dual-control board.
Step 4, setting and configuring before the test is started; the setting is needed before testing each product with different models.
And 41, setting parameters, namely entering by clicking the parameter setting of the FCT tester. Wherein, the FCT tester is connected with the FCT dual control board.
a) Temperature setting: the resistance is tested by matching with 5.1k omega simulation, and the temperature setting value is 26 ℃ at most and 24 ℃ at least. The temperature ports not to be tested were set to 0. And clicking the maximum value or the minimum value during setting, inputting the maximum value or the minimum value to be set in a pop-up box, and clicking to determine to finish the setting. The actual test is set by engineering personnel.
b) Current setting: the setting method is the same as the temperature setting. Because the current comparison tables used are different, the actual test is set by engineering personnel. Set to 0 for the unused current ports.
c) The toggle four bits are set to a value of 5 (0101) and the eight bit toggle is set to 55 (01010101). Wherein, the dialing values are shown in the following table.
d) Voltage setting: the setting method is the same as the temperature setting. 220V sets a maximum of 250V and a minimum of 200V;5V voltage sets maximum 55V, minimum 40V; the 12V voltage setting is set by the engineer as a function of the actual.
e) The expansion valve setting is 255KW.
f) Setting the test time, namely setting for 25s when selecting the phase sequence test; and vice versa for 15s.
Step 42, configuration testing.
a) Switch port test configuration: clicking the switch port to be tested, and selecting by hooking.
b) And (5) phase sequence testing, namely clicking and hooking when testing is needed.
c) And (3) memory test: and when the test is needed, clicking and selecting the test object.
d) Testing a communication port: and when the test is needed, clicking and selecting the test object.
And 5, burning a test program or testing and shipping integrated program for all the tested circuit boards before FCT testing.
And 6, starting testing, namely putting the tested circuit board into the special jig 3, pressing down and fixing, and clicking a test (ON) button to start automatic testing of the FCT. The test progress bar can be observed, and when 100% is displayed, the buzzer can sound (long sound indicates that the test is not qualified, and short sound indicates that the test is qualified).
And 7, completing the test.
And step 71, displaying that the test is qualified or unqualified.
Step 72, parameter query: and clicking parameter query, and querying the temperature value, the current value, the dial switch state value, the 220V voltage value, the 12V voltage value and the 5V voltage value of the current board which is just tested.
Step 73, fault inquiry: clicking fault inquiry can inquire the unqualified items of the current board which is just tested. The intelligent terminal 9 stores and counts the test result of the control board to form a report. The double MCUs of the PCBA are in butt joint through the double control boards for testing, and when the PCBA of the double-MCU variable frequency plywood needs to be tested, the double control boards are tested in parallel, so that the testing speed is greatly improved; when the PCBA of the common single MCU needs to be tested, the added control board is removed, and the use of the FCT of the original single control board is not influenced; and a modularized structure is adopted, so that the hardware development difficulty is reduced, the development speed is high, the cost is low, and the application range is wide.
Example two
Referring to fig. 1-2, fig. 1 is a schematic structural diagram of a dual control board FCT system according to the present invention; fig. 2 is a flowchart of a testing method of the dual control board FCT system according to the present invention.
The embodiment of the invention also provides a test method of the dual control board FCT system, which comprises the following steps:
s1, pressing a test button.
And S2, starting the circuit board to be electrified by the test program of the first control board 1.
And S3, the first control board 1 is in communication connection with a first serial interface serial1 of a first micro control unit 4 of the circuit board, and is used for testing an I/O port of the first micro control unit 4.
And S4, the second serial interface serial2 of the first micro control unit 4 of the circuit board is in communication connection with the second micro control unit 5 of the circuit board, and the silence is kept after the communication is finished.
And S5, the first control board 1 starts a test program of the second control board 2, the second control board 2 controls an output loop of the relay 7 to be closed, the second control board 2 is in communication connection with the second micro control unit 5 of the circuit board through a sixth serial port 15, and the I/O port of the second micro control unit 5 starts to be tested.
And S6, the first control board 1 receives the test result of the second control board 2.
And S7, summarizing the received test result of the second control board 2 and the test result of the first control board 1 through the first control board 1, and then uniformly sending the collected test results to the display board 8.
And S8, displaying the final test result by the display panel.
And S9, controlling the circuit board to be powered off by the first control board 1 test program according to the final test result.
Specifically, initially, a test button is pressed; starting the PCBA board to be electrified by a test program of the first control board 1; the first serial interface serial1 of the first micro control unit 4 of the PCBA board is connected with the first control board 1 in a communication mode, and the first serial interface serial1 is used for testing an I/O port of the first micro control unit 4; the second serial interface serial2 of the first micro control unit 4 of the PCBA board is in communication connection with the second micro control unit 5 of the PCBA board, and the communication is finished and the silence is kept; the first control board 1 starts a test program of a second control board 2, the second control board 2 controls an output loop of a relay 7 to be closed, the output loop is in communication connection with the second micro control unit 5 of the PCBA board through a sixth serial port 15 of the second control board 2, and an I/O port of the second micro control unit 5 starts to be tested; the first control board 1 receives the test result of the second control board 2; after the test result of the second control board 2 and the test result of the first control board 1 are collected by the first control board 1, the collected test results are sent to the display board 8 in a unified way; displaying the final test result; and the first control board 1 test program controls the power-off of the PCBA board according to the final test result.
In this embodiment, the I/O port of the first mcu 4 includes an input switch port and an input temperature port. The I/O port of the second mcu 5 includes a PFC switch test port and an IPM test port. Optionally, the I/O port of the second micro control unit 5 further includes a short circuit overcurrent test port and an IPM temperature test port.
Specifically, the first control board 1 communicates with a first serial interface serial1 of a first micro control unit 4 of the PCBA, and tests the read/write of an external relay, an expansion valve, a temperature port, a switch port, a memory chip controlled by the MCU1 and the 12V and 5V reference voltages of the circuit. Meanwhile, a second serial interface serial2 of a first micro control unit 4 of the PCBA sends protocol data to a second micro control unit 5, the second micro control unit 5 returns data according to protocol convention after receiving the protocol data, if the first micro control unit 4 receives the convention data, a flag bit 1 is set, and if the convention data is not received, a flag bit 0 is set; after which the serial port of the first microcontrol unit 4 remains silent. The first control board 1 starts the test program of the second control board 2 through the fifth serial port 14 of the second control board 2 at the same time, the test program of the second control board 2 is delayed for 10s (waiting for the second serial port serial2 of the first micro control unit 4 to enter silence), then the output loop of the relay 7 is closed, the sixth serial port 15 of the second control board 2 is connected with the serial port of the second micro control unit 5, and the test of the PFC, IPM, overcurrent protection, over-temperature protection, bus voltage of a direct current fan port and a circuit, 15V, 5V and 2.5V reference voltage controlled by the second micro control unit 5 is started.
Compared with the prior art, the invention adopts the first control board 1, the second control board 2, the display board 8, the special jig 3, the circuit board 6, the first micro control unit 4, the second micro control unit 5, the relay 7 and the intelligent terminal; by pressing a start test switch, a test program of the first control board 1 is started, and the first control board 1 directly communicates with the first micro control unit 4 on the circuit board 6 to start testing for testing functional I/O related to the first micro control unit 4; the first control board 1 is connected with the second control board 2, the second control board 2 is started to start testing, and the second control board 2 is communicated with the second micro control unit 5 through the relay 7 and used for testing functional I/O related to the second micro control unit 5; after the second control board 2 finishes testing, sending a test result to the first control board 1, and after the first control board 1 summarizes the received test result of the second control board 2 and the test result of the first control board, uniformly sending the display board 8 to display a final test result, and finishing testing; the double MCUs of the PCBA are butted through the double control boards for testing, and when the PCBA of the double-MCU variable frequency plywood needs to be tested, the double control boards are tested in parallel, so that the testing speed is greatly improved; when the PCBA of the common single MCU needs to be tested, the added control board is removed, and the use of the FCT of the original single control board is not influenced; and a modular structure is adopted, so that the hardware development difficulty is reduced, the development speed is high, the cost is low, and the application range is wide.
Claims (6)
1. A dual control board FCT system, comprising: the intelligent control system comprises a first control board, a second control board, a display board, a special jig, a circuit board, a first micro control unit, a second micro control unit, a relay and an intelligent terminal;
the circuit board is installed on the special jig, the first micro control unit and the second micro control unit are respectively and electrically connected with the circuit board, the first control board is respectively in communication connection with the display panel, the intelligent terminal, the first micro control unit and the second control board, the first micro control unit is in communication connection with the second micro control unit, an input loop of the relay is connected with the second control board, and an output loop of the relay is connected with the second micro control unit;
the first control board is used for testing the I/O port of the first micro control unit, the second control board is used for testing the I/O port of the second micro control unit, and after the test is finished, the test result is sent to the first control board, and after the test result of the second control board is received by the first control board and is aggregated with the test result of the first control board, the test result is sent to the display board in a unified mode to display the final test result;
the I/O port of the first micro control unit comprises an input switch port and an input temperature port; the I/O port of the second micro control unit comprises a PFC switch test port and an IPM test port.
2. The dual-control-board FCT system of claim 1, wherein the first control board is provided with a first serial port, a second serial port, a third serial port and a fourth serial port, the first serial port is connected to the display board, the second serial port is connected to the first micro-control unit, the third serial port is connected to the second control board, and the fourth serial port is connected to the smart terminal.
3. The dual control board FCT system of claim 1, wherein the relay is a time delay closed relay.
4. The dual control board FCT system of claim 1, wherein the second control board has a fifth serial port, a sixth serial port and a seventh serial port, the fifth serial port is connected to the first control board, the sixth serial port is connected to the output circuit of the relay, and the seventh serial port is connected to the input circuit of the relay.
5. The dual control board FCT system of claim 1, wherein the circuit board is a PCBA board, the first micro control unit is a first MCU, and the second micro control unit is a second MCU.
6. A method for testing a dual control board FCT system according to any of claims 1-5, characterized in that it comprises the following steps:
s1, pressing a test button;
s2, starting the circuit board to be electrified by a test program of the first control board;
s3, the first control board is in communication connection with a first serial interface of a first micro control unit of the circuit board and used for testing an I/O port of the first micro control unit;
s4, the second serial interface of the first micro control unit of the circuit board is in communication connection with the second micro control unit of the circuit board, and the second micro control unit of the circuit board keeps silent after communication is finished;
s5, the first control board starts a test program of a second control board, the second control board controls an output loop of a relay to be closed, the second control board is in communication connection with the second micro control unit of the circuit board, and an I/O port of the second micro control unit starts to be tested;
s6, the first control board receives a test result of the second control board;
s7, summarizing the received test result of the second control board and the test result of the first control board through the first control board, and uniformly sending the test results to a display board;
s8, the display panel displays a final test result;
and S9, controlling the circuit board to be powered off by the first control board test program according to the final test result.
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