CN106201014A - A kind of multichannel PS2 able to programme interface UAS button decoder - Google Patents

Abstract

The present invention relates to a kind of multichannel PS2 able to programme interface UAS button decoder, including keystroke interface circuit, instruction decoding circuit, command reception circuit, data feedback circuit, key storage circuit and some PS2 interface circuits.Present invention employs the minimal application system with single-chip microcomputer as core, it is possible to by the key code information that instruction change button is corresponding, it is adaptable to noncoding Independent keys and matrix press-key, and there is the modifiable function of button key.There is many PS2 Interface design to realize singly organizing button and the control of single computer also realizes can singly organize button control multiple stage computer simultaneously simultaneously, meet the needs of UAS multiple air combat.

Description

A multi-channel programmable PS2 interface UAV system key decoder

technical field

The invention belongs to the unmanned aerial vehicle electronic technology, and relates to a multi-channel programmable PS2 key decoding device for an unmanned aerial vehicle system.

Background technique

The key decoder is a device that converts non-coded independent keys or matrix keys into standard keyboards with multiple PS2 interfaces, and can be used in many fields such as industrial control, video surveillance, and unmanned aerial vehicles. At present, the known key decoding devices are all special equipment for solidifying the key codes of the keys, and cannot change the key code values of the keys according to the use requirements. When applying to new use requirements, the key decoding equipment needs to be redesigned, so Does not have the characteristics of generalization. The known patents (patents 200610132019.7 and 200510100145.X) are used for key recognition of embedded system devices (such as mobile phones), which cannot be directly connected to the PS2 interface in the PC. At the same time, the key code of each key is fixed and cannot be changed. , and there is only one interface connected to the processor or computer, which cannot meet the requirements of using a single group of keys to control multiple control computers at the same time in the multi-machine control system of the UAV, and the key code can be changed online as needed, so it cannot be used in unmanned machine system application.

Contents of the invention

The technical problem solved by the present invention is: in order to overcome the shortcomings of the existing key decoding device that cannot be generalized and cannot control multiple computers at the same time, the present invention designs a key code that can send instructions through the command interface to change the key code corresponding to the key. Value decoding equipment, and at the same time for the use of a single group of buttons to control multiple computers, this device is designed with multiple PS2 interfaces, and set single or multiple PS2 interface outputs according to the instructions received by the command interface to meet the multi-machine UAV The requirements for the use of the control system.

The technical solution of the present invention is: a multi-channel programmable PS2 interface unmanned aerial vehicle system button decoder, which is characterized in that it includes a button interface circuit 2, an instruction decoding circuit 3, an instruction receiving circuit 6, and a data return circuit 7 , key code storage circuit 8 and some PS2 interface circuits; Key code storage circuit 8 is used to store three types of setting information of button type, PS2 output channel and key code value; In the storage circuit 8, the button mode, PS2 output channel and key code value information are read into the memory of the instruction decoding circuit 3; code circuit 3; the command decoding circuit 3 compares the key type and key code information stored in the key signal received with the command decoding circuit 3 internal memory, thereby determining the key code value corresponding to the current key signal; according to the key code stored in the internal memory PS2 output channel setting information, the key code value is passed into its corresponding controlled computer according to known PS2 transmission protocol through the PS2 interface circuit of setting; The key mode, PS2 output channel and key code value setting information stored in the internal memory are transferred to the external control device 9 through the return data circuit 7 for display; when it is necessary to change the key mode, PS2 output channel or key code value setting information, the external The control device 9 passes the command receiving circuit 6 and the command decoding circuit 3 into the key code storage circuit 8 to change the information according to the agreed communication protocol; The key type, PS2 output channel and key code value setting information saved in the work, when the power is turned on again, the instruction decoding circuit 3 first transfers the new key mode, PS2 output channel and key code from the key code storage circuit 8 The value information is read into the internal memory of the instruction decoding circuit 3, and the device will work according to the new setting information.

The further technical scheme of the present invention is: described key code storage circuit 8 is a kind of EEPROM chip model of serial communication is 24C02, and its A0 end, A1 end, A2 end and GND end are all grounded; VCC end and external VCC end connected; the WP terminal is grounded; the SDA terminal is connected to the I2C interface input terminal P3.1 of the command decoding circuit 3; the SCL terminal is connected to the I2C interface output terminal P3.0 of the command decoding circuit ³ . It should be noted that the I ² C communication system and programming method are well known.

A further technical solution of the present invention is: the instruction receiving circuit 6 is the RS232 signal receiver in the MAX3232 chip, and the data return circuit 7 is the RS232 signal transmitter in the MAX3232 chip; the input terminal of the instruction receiving circuit 6 is connected with the external control device The output end is connected to the UxRXD0 port on the instruction decoding circuit 3; the input end of the data return circuit 7 is connected to the UxTXD0 port on the instruction decoding circuit 3, and the output end is connected to the external control device.

A further technical solution of the present invention is: the instruction decoding circuit 3 is a 430 series single-chip microcomputer.

A further technical solution of the present invention is: if the button interface circuit 2 is connected to non-coded independent buttons, the pins are sequentially connected to the IO pins P1.0-1.7 and P2.0-2.7 of the instruction decoding circuit 3, and up to 16 can be connected. Non-coding independent buttons; if connecting non-coding matrix buttons, the row vector pins are connected to the IO pins P1.0~P1.7 of the instruction decoding circuit 3, and the column vector pins are connected to the IO pin P2 of the instruction decoding circuit 3. 0～P2.7, can access up to 8 rows x 8 columns, that is, 64 non-coded matrix keys.

Invention effect

The technical effect of the present invention is that: due to the adoption of the minimum application system with a single-chip microcomputer as the core, and the design of the control interface, the external control device 9 can send instructions to the device through the control interface to change the key type and key code information corresponding to the key. Coded independent keys and matrix keys, and has the function of changing the key code, which has good versatility. At the same time, the multi-PS2 interface design can not only realize the control of a single computer by a single group of buttons, but also realize the simultaneous control of multiple computers by a single group of buttons, which meets the needs of multi-machine control of the UAV system.

Description of drawings

Fig. 1 is a schematic diagram of the present invention;

Fig. 2 is a schematic diagram of a key code storage circuit.

Description of reference signs: 1-external non-coded independent key or matrix key, 2-key interface circuit, 3-command decoding circuit, 4-PS2 interface circuit 1, 5-PS2 interface circuit 2, 6-command receiving circuit, 7 - data return circuit, 8 - key code storage circuit, 9 - external control equipment, 10 - external controlled computer 1, 11 - external controlled computer 2

detailed description

The technical solutions of the present invention will be further described below in conjunction with specific implementation examples.

1-2, the device includes key interface circuit 2, instruction decoding circuit 3, PS2 interface circuit 14, PS2 interface circuit 25, instruction receiving circuit 6, data return circuit 7 and key code storage circuit 8. The key interface circuit is an interface circuit of keys. The input end is an external single key or matrix key, and the output end is connected to interfaces P1.0-P1.7 and P2.0-2.7 of the instruction decoding circuit 3 . The instruction decoding circuit 3 is the minimum application system of the known 430 series single-chip microcomputer, which can receive the control instruction transmitted by the asynchronous serial data receiving end (UxRXD0), and the external control device 9 passes through the software, according to the agreed control instruction frame format and instruction code, identify the button type, control mode and key code setting information with the judgment method of the frame content, and save these information in the key code storage circuit 8, and the saved information can not be lost after power off. It should be noted that the software is serial communication software, which can be directly downloaded from the Internet or developed by known methods; the key type, control mode and key code setting information preserved in the key code storage circuit 8 can only be obtained through Receive the control command transmitted by the asynchronous serial data receiver (UxRXD0) to change. In addition, the command decoding circuit 3 can send the data of the currently working key type, control mode and key code setting information to the external control device 9 through the asynchronous serial data transmitting terminal (UxTXD0) according to the agreed format according to the control command. When powered on, the command decoding circuit 3 first reads the key mode, PS2 output channel and key code value information into the memory of the command decoding circuit 3 from the key code storage circuit 8 . If the button type is set as an independent button, the instruction decoding circuit 3 periodically collects the button signals of the P1.0-P1.7 and P2.0-2.7 interfaces. When no button is pressed, the P1 collected by the instruction decoding circuit 3 .0～P1.7 and P2.0～2.7 interface signals are all low level, when a key is pressed, the interface signal corresponding to the key is high level, and the key information corresponding to the key is obtained, and at the same time, it is translated according to the instruction Code circuit 3 memory control mode information, the button information is sent to the corresponding PS2 interface circuit through the GPIO port of the single-chip microcomputer according to the known standard PS2 communication interface protocol. If the button type is set to matrix button, the instruction decoding circuit 3 will set P1.0~P1.7 as input, the default state is low level, and set P2.0~P2.7 as output, the default state is high level Ping, instruction decoding circuit 3 periodically collects P1.0~P1.7 button signals, when a button is pressed, the signal corresponding to the P1.0~P1.7 signal button collected by instruction decoding circuit 3 is high level , so as to know which row of the matrix keys has a key pressed, and then the instruction decoding circuit 3 will set P1.0~P1.7 as output, the default state is high level, and set P2.0~P2.7 as input , the default state is low level, and the signals corresponding to the P2.0~P2.7 signal buttons collected by the instruction decoding circuit 3 are high level, so as to know which column of the matrix buttons has a button pressed, and finally know which column of the matrix buttons is pressed. Which key is pressed, the instruction decoding circuit 3 will compare the key code setting information collected from the key signal with the key code setting information in the memory of the instruction decoding circuit 3, and obtain the key information corresponding to the key. The stored control mode information sends the key information to the corresponding PS2 interface circuit through the GPIO port of the single chip microcomputer according to the known standard PS2 communication interface protocol. The control instruction receiving circuit 6 is an RS232 signal receiver. The control instruction enters the RS232 signal receiver, and enters the asynchronous serial data receiving end of the instruction decoding circuit 3 from its output end. The PS2 interface circuit 1 is used to connect with the external controlled computer, the input terminal is the P4.0 and P4.1 pins of the instruction decoding circuit 3, and the output terminal is connected to the external controlled computer. The PS2 interface circuit 2 is used to connect with the external controlled computer, the input terminal is the P4.2 and P4.3 pins of the instruction decoding circuit 3, and the output terminal is connected to the external controlled computer. The instruction receiving circuit 6 is an RS232 signal receiver. The input terminal is connected to the external control device 9, and the output terminal is connected to the UxRXD0 pin of the instruction decoding circuit 3. The data return circuit 7 is an RS232 signal transmitter. The input terminal is connected to the instruction decoding circuit 3UxTXD0 pin, and the output terminal is connected to the external control device 9 . The key code storage circuit 8 is a data storage circuit. The input end is connected to the P3.0 pin of the instruction decoding circuit 3 , and the output end is connected to the P3.1 pin of the instruction decoding circuit 3 . The keyboard interface circuit 2 is an interface circuit of non-coded independent keys or matrix keys. The input end is an external non-coded independent key or matrix key, and the output end is connected to the P1.0-P1.7 and P2.0-2.7 interfaces of the instruction decoding circuit 3, up to 16 independent keys. When the input terminal is a single button connection, a maximum of 16 buttons can be connected, and when the input terminal is a matrix button, a maximum of 8 rows×8 columns of matrix buttons can be connected, that is, 64 matrix buttons.

The instruction decoding circuit 3 is the minimum application system of the known 430 series single-chip microcomputer, which can receive the control instruction control instruction transmitted by the instruction receiving circuit 6 through the asynchronous serial data receiving terminal (UxRXD0), and the control instruction frame format and Instruction code, using the agreed judgment method to identify different button setting codes. It should be noted that the agreed protocol and judgment method described in the patent 201510197173.1, that is: the agreed protocol is a communication protocol, and the length of each data frame is 66 bytes, with the hexadecimal data "0x EB 0x 90" as the data frame header, the first byte after the data frame header is the key type, using the hexadecimal data 0x55 to represent non-encoded independent keys, sixteen The hexadecimal data 0xAA means non-encoded matrix key; the second word after the data frame header means output through which or those PS2 channels, this byte is represented by the lower 4 bits, 0 means no output in each bit, 1 means output, For example, 0x01 means that only PS1 port has output, 0x02 means only PS2 port has output, 0x03 means both PS1 port and PS2 port have output; if it is a non-coded independent key, the data frame header is from the third byte to the tenth byte Represents the key code value of the button connected to the P1.0~P1.7 pin in turn, and the 11th byte to the 18th byte after the data frame header represents the key code of the button connected to the P2.0~P2.7 pin in turn Value, the 19th byte to the 66th byte after the data frame header are all "0x00"; if it is a non-coding matrix button, connect P1.0~P1.7 pins. The button is the row vector of the matrix button, and connect to P2 The .0～P2.7 pin keys are the column vectors of the matrix keys, forming an 8 (row)×8 (column) matrix, and the 3rd byte to the 10th byte after the data frame header represent the connection to the first row of keys (For example, the 3rd byte after the frame header represents the keycode value of the key in row 1 and column 1, the 4th byte after the frame header represents the keycode value of the button in row 1 and column 2, By analogy, the 10th byte after the frame header represents the key code value of the button in the first row and the 8th column), and the 11th byte to the 18th byte after the frame header represents the key code of the button connected to the second row value, and so on, from the 59th byte to the 66th byte after the frame header represents the key code value of the button connected to the 8th row. The key code value is the ASCII code value corresponding to the known PC standard keyboard, for example, the ASCII code value of "a" is 0x61, and the ASCII code value of "A" is 0x41. Take this device as an independent button, only PS2 output, if only the button connected to P1.0 is set to output a, and the button connected to P1.3 is set to output A as an example, then the content of the control command is 0xEB 0x90 0x550x02 0x61 0x00 0x41 0x00……. The rest of the content that is not set is filled with 0x00 by default. This device first clears the storage information in the key code storage circuit 8, and then saves all content except 0xEB 0x90 in the key code storage circuit 8 in byte order. The success flag data sent by the serial communication software, its content is the character "OK". When the third byte of the control command frame is 0xFA, it means that the external control device 9 inquires the current working status of the device, and the device will return the key mode, PS2 output channel and key code value information stored in the memory to the external control device 9. The format of the returned data frame is the same as that of the control command frame, that is, the frame length is 66 bytes, "0x EB 0x90" is the data frame header, and the first byte after the data frame header is the key type, using hexadecimal The system data 0x55 indicates that the current setting is a non-coding independent key, and the hexadecimal data 0xAA indicates that the current setting is a non-coding matrix key; the second word after the data frame header indicates which or several PS2 channels are output, indicating the method and control The instructions are the same, and the remaining bytes are the coded values of each key.

The instruction decoding circuit 3 saves the setting information in the key code storage circuit 8 . When powered on, the instruction decoding circuit 3 will read the setting information from the key code storage circuit 8 into its internal memory, and then according to the setting information control mode, output a single PS2 interface or output multiple PS2 interfaces to correspond to the number of computers. The key type, key code setting information and control mode information are all stored in the key code storage circuit 8, and the stored information can not be lost after power failure. Key type, key code setting information and control mode information can only be changed by receiving control commands transmitted by the asynchronous serial data receiver (UxRXD0). The PS2 interface circuit 1 is used to connect with the external controlled computer, the input terminal is the P4.0 and P4.1 pins of the instruction decoding circuit 3, and the output terminal is connected to the external controlled computer. This circuit mainly converts the CMOS level output by the MSP430 microcontroller into the TTL level used by the standard PS2 interface.

The PS2 interface circuit 2 is used to connect with the external controlled computer, the input terminal is the P4.2 and P4.3 pins of the instruction decoding circuit 3, and the output terminal is connected to the external controlled computer. This circuit mainly converts the CMOS level output by the MSP430 microcontroller into the TTL level used by the standard PS2 interface.

The instruction receiving circuit 6 is an RS232 signal receiver. The input terminal is connected to the external control device 9, and the output terminal is connected to the UxRXD0 pin of the instruction decoding circuit 3, that is, the P3.5 pin.

The data return circuit 7 is an RS232 signal transmitter. The input terminal is connected to the UxTXD0 pin of the instruction decoding circuit 3 , that is, the P3.4 pin, and the output terminal is connected to the external control device 9 .

The key code storage circuit 8 is a data storage circuit. The input end and the output end are connected to the P3.0 and P3.1 pins of the instruction decoding circuit 3 .

Compared with the prior art, the innovation of this patent has the following points: (1) the prior art keyboard interface circuit is connected to fixed non-coding independent keys or fixed non-coding matrix keys, which cannot be compatible; the keyboard interface circuit of this patent Compatible with non-coded independent buttons or non-coded matrix buttons two control methods.

(2) The key code of the prior art button is solidified, and the key code value of the button cannot be changed according to the use requirements; this patent can change the key code value of the button according to actual work needs.

(3) Because the keyboard interface circuit of the prior art and the key code of button are immobilized, so it has no storage function; This patent is owing to can change the key code value of button mode and button, so the key of the selected control information and button The code value has a storage function, which is automatically stored after being changed, and it can work in the changed working mode only by powering on and restarting.

(4) The keyboard interface circuit of the prior art and the computer have a one-to-one control relationship through 1 PS2, while the keyboard interface circuit of this patent and the computer can have a one-to-one control relationship or a one-to-two control relationship.

The working process of the present invention is as follows: the first input control information and change control information are sent to the RS232 signal receiver through the serial port communication software of the external control device 9, and are stored in the key code storage circuit 8 through the instruction decoding circuit 3. In the command decoding circuit 3, the interrupt receiving the "RS232 signal receiver" has the highest priority. If the interrupt is triggered, the button information is invalid, and the device receives the control information and automatically stores the control information. After the storage is successful, it will be displayed on the external control device 9 The serial port communication software of the device receives the successful sign data sent by the device, and its content is the character "OK". At this time, the device is powered off, and when the device is restarted, the newly stored information in the key code storage circuit 8 is read into the instruction In the internal memory of the decoding circuit 3, the device works according to the "key type, control mode and key code setting information" stored in the internal memory.

If the button type is set as an independent button, when the power is on, the instruction decoding circuit 3 periodically collects the button signals of the P1.0~P1.7 and P2.0~2.7 interfaces, and when no button is pressed, the instruction decoding The P1.0~P1.7 and P2.0~2.7 interface signals collected by circuit 3 are all low level. When a button is pressed, the interface signal corresponding to the button is high level, and the instruction decoding circuit 3 will The collected key signal is compared with the key code setting information stored in the memory to obtain the key information corresponding to the key. At the same time, according to the control mode information stored in the memory, the key information is passed through the MCU according to the known standard PS2 communication interface protocol. The GPIO port sends the key information to the corresponding PS2 interface circuit. If the button type is set as a matrix button, the instruction decoding circuit 3 will set P1.0~P1.7 as input, the default state is low level, and set P2.0~P2.7 as output when power is on. The default state is high level, and the command decoding circuit 3 periodically collects P1.0~P1.7 button signals first. When a button is pressed, the P1.0~P1.7 signal collected by the instruction decoding circuit 3 corresponds to the button The signal of the signal is high level, so as to know which row of the matrix keys has a key pressed, and then the instruction decoding circuit 3 will set P1.0~P1.7 as output, the default state is high level, and set P2.0~P1.7 P2.7 is set as input, the default state is low level, and the signals corresponding to the P2.0~P2.7 signal buttons collected by the instruction decoding circuit 3 are high level, so as to know which column of the matrix buttons has a button pressed, Finally know which button is pressed in the matrix button, the instruction decoding circuit 3 will compare the collected button signal with the key code setting information stored in the memory to obtain the button information corresponding to the button, and at the same time according to the stored in the memory The control mode information, the key information is sent to the corresponding PS2 interface circuit through the GPIO port of the single chip microcomputer according to the known standard PS2 communication interface protocol.

When it is necessary to change the button type, control mode and key code setting information, the external control device 9 passes the control command to the UxRXD0 pin of the command decoding circuit 3 through the command receiving circuit 6, and when the command decoding circuit 3 receives the control command , first clear the storage information in the key code storage circuit 8, then save the key type, control mode and key code setting information of the new control command into the key code storage circuit 8. Then when the equipment was powered on again, the instruction decoding circuit 3 read the new key type, control mode and key code setting information into the internal memory from the key code storage circuit 8, and started working according to the new setting information.

When inquiring about the current working state of the device, the external control device 9 will pass the query instruction to the UxRXD0 pin of the instruction decoding circuit 3 through the instruction receiving circuit 6. When the instruction decoding circuit 3 receives the control instruction, it will The setting information stored in the memory is sent to the external control device 9 through the data return circuit 7 through the UxTXD0 pin of the instruction decoding circuit 3 according to the agreed communication protocol.

Claims (5)

1. a multichannel PS2 able to programme interface UAS button decoder, it is characterised in that include keystroke interface circuit (2), instruction decoding circuit (3), command reception circuit (6), data feedback circuit (7), key storage circuit (8) and some PS2 Interface circuit；Key storage circuit (8) stores in advance keystroke pattern, PS2 output channel and key value three category information；Power on During work, instruction decoding circuit (3) first stores keystroke pattern, PS2 output channel and key value information circuit (8) from key Read in the internal memory of instruction decoding circuit (3)；When there being button to press, keystroke interface circuit (2) receives from outside button After signal, incoming instruction decoding circuit (3)；Instruction decoding circuit (3) is by the push button signalling received and instruction decoding circuit (3) Push-button type and the key code information of depositing middle storage are compared, so that it is determined that the key value that current push button signalling is corresponding；According to interior Deposit the PS2 output channel configuration information of middle storage, key value is transmitted according to known PS2 by the PS2 interface circuit arranged Agreement its corresponding controlled computer incoming；Meanwhile, when external control devices sends query statement, instruction decoding circuit (3) can be incoming through return data circuit (7) by the keystroke pattern preserved in internal memory, PS2 output channel and key value configuration information External control devices shows；When needs change keystroke pattern, PS2 output channel or key value configuration information, outside control The instruction of the information of change is passed according to the communication protocol of agreement by control equipment through command reception circuit (6) and instruction decoding circuit (3) Enter in key storage circuit (8)；In the case of not re-powering, instruction decoding circuit (3) is still according to being preserved in internal memory Push-button type, PS2 output channel and key value configuration information are operated, when re-powering, instruction decoding circuit (3) first from The keystroke pattern newly stored, PS2 output channel and key value information are read in instruction decoding circuit by key storage circuit (8) (3), in internal memory, this equipment will be operated by new configuration information.

2. a kind of multichannel PS2 able to programme interface UAS button decoder as claimed in claim 1, its feature exists In, described key storage circuit (8) is the eeprom chip of a kind of serial communication, and model is 24C02, its A0 end, A1 end, A2 end Ground connection equal with GND end；VCC end is connected with extraneous VCC end；WP end ground connection；SDA end and the I2C interface of instruction decoding circuit (3) Input P3.1 is connected；SCL end is connected with the I2C interface outfan P3.0 of instruction decoding circuit (3).

3. a kind of multichannel PS2 able to programme interface UAS button decoder as claimed in claim 1, its feature exists In, described command reception circuit (6) is the RS232 signal receiver in MAX3232 chip, and data feedback circuit (7) is RS232 sender unit in MAX3232 chip；On the output pin of RS232 signal receiver and instruction decoding circuit (3) UxRXD0 port is connected；The input pin of RS232 sender unit is connected with the UxTXD0 port on instruction decoding circuit (3) Connect.

4. a kind of multichannel PS2 able to programme interface UAS button decoder as claimed in claim 1, its feature exists In, described instruction decoding circuit (3) is 430 series monolithics.

5. a kind of multichannel PS2 able to programme interface UAS button decoder as claimed in claim 1, its feature exists In, keystroke interface circuit (2) is if fixing non-coding Independent keys, and the IO of pin order link order decoding circuit (3) manages Foot P1.0～1.7 and P2.0～2.7, the most accessible 16 non-coding Independent keys；If fixing non-coding matrix press-key, I/O pin P1.0～P1.7 of row vector pin link order decoding circuit (3), column vector pin link order decoding circuit (3) I/O pin P2.0～P2.7, at most accessible 8 row × 8 row, i.e. 64 non-coding matrix press-key.