CN220085495U

CN220085495U - Test platform

Info

Publication number: CN220085495U
Application number: CN202223526150.5U
Authority: CN
Inventors: 王波; 刘代龙; 周天雨; 柳艳艳; 李新; 王晨玉; 孟甫; 孙文朋; 刘国强; 王鹏; 刘锐; 高宇; 张文琦
Original assignee: Zhengzhou Coal Machinery Intelligent Working Face Technology Co ltd
Current assignee: Zhengzhou Coal Machinery Intelligent Working Face Technology Co ltd
Priority date: 2022-12-25
Filing date: 2022-12-25
Publication date: 2023-11-24
Anticipated expiration: 2032-12-25

Abstract

The utility model discloses a test platform which is characterized by comprising a key scanning circuit, a power supply and external interface circuit, a program downloading interface, a power supply conversion circuit, an external serial port circuit, an sd card interface circuit, a flash memory circuit, a liquid crystal circuit and a backlight control circuit. The network label corresponding to the key scanning circuit is connected to pins of the PC15-PC13, the three pins are configured into a pull-up input state after the singlechip is electrified, and then a key scanning task is created through the rtos system and used for scanning the level change of the corresponding pins of the keys. The device is simple and portable, the difficulty of the upper hand is low, and the testing platform with strong universality can meet the requirements of mass production of products and equipment testing under complex working conditions.

Description

Test platform

Technical Field

The utility model relates to the technical field of intelligent testing, in particular to a testing platform.

Background

In the past Canopen master-slave equipment test process is more complicated, a pc computer is needed, host computer software is needed, usb changes can and other equipment, the Canopen protocol is relatively complicated, a plurality of communication instructions are needed to be sent during the test, the data transmission capacity is relatively large during the communication, the test result is not easy to observe, in addition, different Canopen equipment has different object dictionaries, data are needed to be sent and received strictly according to the communication format specified by the object dictionary during the test, the object dictionary is specially used for describing the communication information of a Canopen node, and a tester must master the related knowledge of the Canopen protocol and can read the content of the object dictionary.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

Disclosure of Invention

The utility model aims to provide a remote controller testing tool.

In order to achieve the above purpose, the utility model provides a test platform, which comprises a key scanning circuit, a power supply and external interface circuit, a program downloading interface, a power supply conversion circuit, an external serial port circuit, an sd card interface circuit, a flash memory circuit, a liquid crystal circuit and a backlight control circuit.

Preferably, the network label corresponding to the key scanning circuit is connected to pins of the PC15-PC13, the three pins are configured into a pull-up input state after the singlechip is electrified, and then a key scanning task is created through the rtos system for scanning the level change of the corresponding pins of the keys.

Preferably, the power supply and external interface circuits have the key functions from top to bottom respectively

The power interface is 5.5V-36V wide voltage input, and is compatible with most industrial electrical equipment;

the can communication interface is used for testing the can communication access of the equipment;

VCC, GND external power supply output 3.3v;

and the network is directly connected to an external interrupt pin of the singlechip, and a rising edge or a falling edge is generated when the external level changes, so that the external interrupt of the singlechip is triggered to analyze the K2 state in an external interrupt function of a program, and corresponding logic processing is executed.

Preferably, the program downloading interface needs to be connected with a GND and VCC two-wire system for supplying power.

Preferably, the liquid crystal circuit adopts a 16/8 bit parallel MCU data bus, and LEDA and LEDK respectively represent an anode and a cathode of the liquid crystal backlight.

Preferably, the backlight control circuit outputs high and low levels through BL control, and controls the triode to be turned off or turned on.

Compared with the prior art, the remote controller testing tool has the following beneficial effects:

the device is simple and portable, the difficulty of the upper hand is low, and the testing platform with strong universality can meet the requirements of mass production of products and equipment testing under complex working conditions.

Drawings

Fig. 1 is a circuit diagram of a key scanning circuit according to an embodiment of the present utility model.

Fig. 2 is a circuit diagram of a power supply and external interface circuit according to an embodiment of the present utility model.

Fig. 3 is a circuit diagram of a program download interface according to an embodiment of the present utility model.

Fig. 4 is a circuit diagram of a power conversion circuit according to an embodiment of the present utility model.

Fig. 5 is a circuit diagram of an external serial circuit according to an embodiment of the present utility model.

Fig. 6 is a circuit diagram of sd card interface circuit according to an embodiment of the present utility model.

Fig. 7 is a circuit diagram of a flash memory circuit according to an embodiment of the present utility model.

Fig. 8 is a circuit diagram of a liquid crystal circuit according to an embodiment of the present utility model.

Fig. 9 is a circuit diagram of a backlight control circuit according to an embodiment of the present utility model.

Detailed Description

The following detailed description of embodiments of the utility model is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the utility model is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.

The remote controller test platform according to the preferred embodiment of the present utility model.

As shown in fig. 1, the key scanning circuit has key functions of "turn down", "turn up", "confirm" and buttons from top to bottom, respectively. The corresponding network label is connected to pins of the PC15-PC13, the three pins are configured into a pull-up input state after the singlechip is electrified, then a key scanning task is created through the rtos system and used for scanning the level change of the corresponding pin of the key, when the key is pressed down, the pin of the singlechip is changed from a high level state to a low level state, so that the key is pressed down, a corresponding key value is generated, and the key value is sent to other tasks for logic judgment through the message queue.

Second function of "flip up" key: long press of "Return"

Judgment logic: and if the key scanning function judges that the upturning key is pressed, counting and delaying operations are executed, and when the preset program value is counted, the secondary key can be judged to be in a long-press state, so that a corresponding key value is generated and sent to other tasks for logic judgment through a message queue.

As shown in FIG. 2, the power supply and external interface circuits have the key functions from top to bottom respectively

and the can communication interface is used for testing the can communication access of the equipment.

VCC, GND external power supply output 3.3v.

As shown in FIG. 3, the SWD is a serial debugging interface, and compared with the JTAG, the SWD only needs two wires of SWCLK and SWDIO, so that the occupation of the GPIO port of the singlechip is reduced. SWCLK is a serial clock line providing the required clock signal and SWDIO is a serial data line for reading and writing data. In addition, two-wire system of GND and VCC is needed to supply power.

As shown in fig. 4, the power supply is led into the power supply module (5.5-36V) through an external interface to output 5V/6W of power, and the working temperature is as follows: -40 ℃ to +85 ℃, and has the functions of input under-voltage protection, output over-voltage, over-current and short-circuit protection. The 5V voltage system is used for a can transceiver module and external serial communication equipment supplies power (serial screen).

AMS1117-3.3 is a forward low dropout voltage regulator maximum output current 1A with an output voltage of 3.3V, and is suitable for high-efficiency linear voltage regulators, and the working junction temperature range is as follows: -40-125 ℃.

The 3.3V voltage system is used for the stm32 singlechip and a core circuit thereof, an external flash memory, a sd card, a tft liquid crystal and backlight circuit, and external voltage output and power supply.

As shown in fig. 5, the external serial circuit, the single-chip TTL communication interface, the support for 5V voltage output, the default baud rate 115200, are used for expanding the man-machine interaction device, the serial screen, and the keyboard module.

As shown in fig. 6 and fig. 7, the two memory system circuits are respectively SD and off-chip flash powered by 3.3v, both of which are hung on the same SPI bus, and the single-chip microcomputer selects different memory devices to perform read/write operations by pulling down the chip select pins of both of them.

The characteristics and functions of the two are divided into:

SD: the device has large storage capacity, supports 32GB at maximum, can be plugged and plugged easily and is easy to replace, the functions on the device are designed into data examination and external data examination generated in operation,

flash: the storage space is 8 Mbytes, the memory is small, the reading and writing are convenient, the service life is long, and the functions on the equipment are designed as follows: the character files and gui interface icon files required by the system are stored, the operation data is temporarily stored, and the equipment firmware is stored.

As shown in FIG. 8, the LCD liquid crystal circuit, ILI9342, is a 26144 color monolithic driver that supports an a-TFT LCD with a resolution of 240RGBx320 dots.

The 16/8 bit parallel MCU data bus is adopted, and LEDA and LEDK respectively represent an anode and a cathode of the liquid crystal backlight.

Lcd_rest reset signal.

A1-a16 data lines.

W16_8 switches the 16-bit/8-bit data parallel bus through a 0 ohm resistance.

Lcd_rd reads the command signal.

Lcd_wd write command signal.

Lcd_rs data command select signal.

Lcd_cs chip select signal.

As shown in fig. 9, the backlight control circuit outputs high and low levels through BL control, and controls the transistor to be turned off or on;

high level: the triode is conducted with the LEDK to be grounded and the back is bright;

at low level: the triode is turned off, and the loop is turned off to extinguish the backlight;

BL is connected to singlechip timer channel pin, thereby can utilize pwm control triode on-current to realize backlight adjustment.

The foregoing descriptions of specific exemplary embodiments of the present utility model are presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the utility model and its practical application to thereby enable one skilled in the art to make and utilize the utility model in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the claims and their equivalents.

Claims

1. The test platform is characterized by comprising a key scanning circuit, a power supply and external interface circuit, a program downloading interface, a power supply conversion circuit, an external serial port circuit, a sd card interface circuit, a flash memory circuit, a liquid crystal circuit and a backlight control circuit;

the network label corresponding to the key scanning circuit is connected to pins of a PC15-PC13, the three pins are configured into a pull-up input state after the singlechip is electrified, and then a key scanning task is created through the rtos system and used for scanning the level change of the corresponding pins of the keys;

the power supply and external interface circuit has the key functions from top to bottom respectively

VCC, GND external power supply output 3.3v;

the K2 digital signal input is directly connected to an external interrupt pin of the singlechip, and a rising edge or a falling edge is generated when the external level changes, so that the external interrupt of the singlechip is triggered to analyze the K2 state in an external interrupt function of a program, and corresponding logic processing is executed;

the program downloading interface needs to be connected with GND and VCC two-line systems for supplying power;

the liquid crystal circuit adopts a 16/8 bit parallel MCU data bus, and LEDA and LEDK respectively represent an anode and a cathode of the liquid crystal backlight;

and the backlight control circuit outputs high and low levels through BL control and controls the triode to be turned off or turned on.