CN101609396B - Method for realizing communication protocol of touch screen - Google Patents
Method for realizing communication protocol of touch screen Download PDFInfo
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- CN101609396B CN101609396B CN 200810044705 CN200810044705A CN101609396B CN 101609396 B CN101609396 B CN 101609396B CN 200810044705 CN200810044705 CN 200810044705 CN 200810044705 A CN200810044705 A CN 200810044705A CN 101609396 B CN101609396 B CN 101609396B
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Abstract
The invention discloses a method for realizing communication protocol of a touch screen, relates to a method for realizing communication protocol for transmitting data between a touch screen and a host thereof, and aims to solve the problems that the transmission rate is influenced due to long bytes of coordinate information in the communication protocol of the prior touch screen and the communication is easy to make mistakes because the communication protocol is simple and is not precise or complete. The method comprises that: a controller of the touch screen transmits touch coordinate data of a simple instruction structure with the length of 6 bytes to the host, a driver software set in the host transmits command information or data request information to the controller, and the controller transmits the information responding to the data request information to the driver software. The method is applicable to data communication transmission between the controller of the touch screen and the driver software of the host.
Description
Technical field
The present invention relates to carry out between a kind of touch-screen and its main frame implementation method of the communications protocol that data transmit.
Background technology
Existing touch-screen has polytypes such as electric resistance touch screen, acoustic wave touching screen, infrared touch panel, capacitance touch screen, electromagnetic touch screen, all is made up of the software module of electronic circuit component, drive software or the similar drive software of sensor, controller or similar control device on all kinds touch-screen principle.
Controller action is excitation touch sensor and a senses touch sensor signal, or senses touch sensor signal only, handles these signals and through these Signal Processing being obtained the touch coordinate data of touch-screens, controller has corresponding software.
Drive software is arranged in any main frame or other computing machine with similar host function of using touch-screen.
Controller links to each other with the main frame with the corresponding interface through communication interfaces such as RS232 serial ports or USB and realizes being electrically connected.
Information interaction between controller software and the drive software is exactly a communication protocol of touch screen.
Existing communication protocol of touch screen only comprises the coordinate data information with 10 bytes that the controller of touch-screen transmits to main frame, and is not enough below such communications protocol exists:
1, because the data layout byte is longer, is not easy to realize the quick transmission of touch coordinate information;
2, owing to only have only coordinate data information, communications protocol information is too simple and crude, not rigorous, imperfect, when between touch-screen and main frame, carrying out communication, is prone to make mistakes;
3, poor, the poor fault tolerance of validity;
4, be not easy to expansion;
5, be not easy to the touch-screen software development.
Summary of the invention
The objective of the invention is to solve coordinate information byte long in the existing communication protocol of touch screen and influence transfer rate and communications protocol because of simple and crude, not rigorous, the imperfect problem that causes communication to be prone to make mistakes; A kind of implementation method of communication protocol of touch screen is provided; Byte length through reducing the coordinate data form improves transfer rate; And improved rigorous, the integrality of data in the communications protocol, to improve fault-tolerance and validity, be convenient to expansion and further software development.
The object of the invention is realized through following technical proposals:
A kind of implementation method of communication protocol of touch screen; The controller that comprises touch-screen transmits touch coordinate data to main frame; Comprise that also the drive software through being arranged in the main frame transmits command information or request of data information to said controller, and controller is to the information that said request of data information responds that is directed against of drive software transmission.
Said touch coordinate data is the reduced instruction structure of being made up of 6 bytes, the low 3 bit representation touch condition of the 1st byte wherein, and said touch condition comprises: " beginning to touch ", " touching continuously ", " finishing to touch ".
When expression " begin touch " state, 8 byte positions of the 1st byte are followed successively by from high to low: 1,1, be left empty, Z7, Z6,0,0,1;
When expression " touch continuously " state, 8 byte positions of the 1st byte are followed successively by from high to low: 1,1, be left empty, Z7, Z6,0,1,0;
When expression " finish touch " state, 8 byte positions of the 1st byte are followed successively by from high to low: 1,1, be left empty, Z7, Z6,1,0,0;
8 byte positions of the 2nd byte are followed successively by from high to low: 1, X12, X11, X10, X9, X8, X7, X6;
8 byte positions of the 3rd byte are followed successively by from high to low: 1, X13, X5, X4, X3, X2, X1, X0;
8 byte positions of the 4th byte are followed successively by from high to low: 1, Y12, Y11, Y10, Y9, Y8, Y7, Y6;
8 byte positions of the 5th byte are followed successively by from high to low: 1, Y13, Y5, Y4, Y3, Y2, Y1, Y0;
8 byte positions of the 6th byte are followed successively by from high to low: 1, be left empty, Z5, Z4, Z3, Z2, Z1, Z0;
In the said touch coordinate data,
The X coordinate is represented by from high to low 14 binary digits successively:
X13、X12、X11、X10、X9、X8、X7、X6、X5、X4、X3、X2、X1、X0；
The Y coordinate is represented by from high to low 14 binary digits successively:
Y13、Y12、Y11、Y10、Y9、Y8、Y7、Y6、Y5、Y4、Y3、Y2、Y1、Y0；
The Z coordinate is represented by from high to low 8 binary digits successively:
Z7、Z6、Z5、Z4、Z3、Z2、Z1、Z0。
Said drive software comprises 3 bytes at least to command information or the request of data information that controller transmits, and its form is: < packet opening flag byte>< command/request byte>< packet end mark byte >.
Said drive software is 3 above bytes to command information or the request of data information that controller transmits, and its form is: < packet opening flag byte>< command/request byte>[parameter 1 byte] [parameter 2 bytes] ... [parameter n byte] < packet end mark byte >.
Said packet opening flag byte is 16 system number 01H; Said packet end mark byte is 16 system number 0DH.
Said controller comprises 4 bytes at least to the information that responds to said request of data information that drive software transmits, and its form is: < packet opening flag byte>< response request byte>< error code byte>< packet end mark byte >.
Said controller comprises 4 above bytes to the information that responds to said request of data information that drive software transmits, and its form is: < packet opening flag byte>< response request byte>< error code byte>[parameter 1 byte] [parameter 2 bytes] ... [parameter n byte] < packet end mark byte >.
Said error code byte is 16 system number 30H or 31H, i.e. that expression request is correct is 30H, and that represent request error is 31H.
Said command/request byte comprises any one ASCII character among alphabetical Q, d, i, R, z, t, p, X, x, K, k, C, c, W, the v, and each letter representation implication is respectively:
Q, name is called mourns in silence, and expression allows or forbids that controller is to the main frame report information;
D, name is called diagnosis, and the expression main frame is to controller request touch-screen diagnostic message;
I, name is called the touch-screen configuration information, and the expression main frame is to controller request touch-screen configuration information;
R, name is called and resets, and the expression main frame sends reset instruction to controller;
Z, name is called " sky ", and the expression main frame is replied " sky " information to the controller request;
T, name is called test, and the expression main frame is to controller request screen body of touch screen information;
P, name is called type of touch screens, and the expression main frame is to controller request type of touch screens information;
X, name is called operational factor, and the expression main frame transmits order to controller operational factor is set;
X, the expression main frame is to controller request operational factor;
K, name is called ID number, and the expression main frame transmits order to controller and is provided with ID number that controller and mapping show;
K representes main frame ID number to controller request controller and mapping demonstration, or controller is replied to response of host ID number of controller and mapping demonstration;
C, name is called calibration, and the expression main frame transmits order to controller calibration parameter is set;
C, the expression main frame is provided with calibration parameter to the controller request;
W, name is called the coordinate reporting format, and the expression main frame transmits order to controller the coordinate reporting format is set;
V, name is called controller-level, and the expression main frame is to controller request controller class information.
Said response request byte comprises any one ASCII character among alphabetical d, i, z, t, p, x, k, c, the v, and each letter representation implication is respectively:
D representes that controller is to response of host answer touch-screen diagnostic message;
I representes that controller is to response of host answer touch-screen configuration information;
Z representes that controller is to response of host answer " sky " information;
T representes that controller is to response of host answer screen body of touch screen information;
P representes that controller is to response of host answer type of touch screens information;
X representes that controller replys operational factor to response of host;
K representes controller ID number to response of host answer controller and mapping demonstration;
C representes that controller is provided with calibration parameter to the response of host answer;
V representes that controller is to response of host answer controller-level information.
The present invention adopts above-mentioned method, only just can realize the transmission of coordinate data with 6 bytes, has improved the transfer rate and the efficient of coordinate data; Transmitting order through the drive software that increases main frame to touch screen controller is provided with or request of data information; And touch screen controller transmits the information that responds answer to request of data information to the drive software of main frame; Communication between touch screen controller and the main frame is provided with or request of data information is carried out more rigorous, more complete, action response more accurately according to these orders; Improve reliability, validity and the fault-tolerance of data communication between the two; Packet opening flag byte, the packet end mark byte that is provided with, comprises in the information of request of data through order can guarantee transmit the integrality of data; The error code byte that in the information that responds to said request of data information that drive software transmits, comprises through controller; Can verify the correctness of transmitted information data, improve the accuracy of data transmission; Through the transmission of each alphabetical ASCII character in order setting, request of data and the response return information, can make state and the relevant information understood each other between touch-screen and the main frame each other, improve between the two matching, security and reliability of operation.
It is thus clear that, adopt the present invention of said method, compared with prior art, in the communication between touch-screen and main frame, have transfer rate faster, more rigorous, more complete, action response more accurately, and better reliability, validity and fault-tolerance.
Embodiment
Below in conjunction with specific embodiment the present invention is further described.
A kind of implementation method of communication protocol of touch screen; The controller that comprises touch-screen is to transmitting touch coordinate data through the drive software in the main frame to main frame; And transmit the information that responds to said request of data information that command information or request of data information and controller transmit to drive software to said controller through the drive software that is arranged in the main frame.
Above-mentioned touch coordinate data form is the reduced instruction structure of 6 bytes, and its form is as shown in table 1:
Table 1 touch coordinate data form
Byte position in the table 1 be followed successively by from low to high the 1～8, the 1st byte low 3 respectively through its be that " 1 " expression " begins to touch ", the Status Flag of " touch continuously ", " end touch ".
Can find out that from table 1 the X coordinate is represented by from high to low 14 binary digits successively:
X13、X12、X11、X10、X9、X8、X7、X6、X5、X4、X3、X2、X1、X0；
The Y coordinate is represented by from high to low 14 binary digits successively:
Y13、Y12、Y11、Y10、Y9、Y8、Y7、Y6、Y5、Y4、Y3、Y2、Y1、Y0；
The Z coordinate is represented by from high to low 8 binary digits successively:
Z7、Z6、Z5、Z4、Z3、Z2、Z1、Z0。
Information is set in the order that drive software in the main frame transmits to touch screen controller or request of data information is 3 or 3 above bytes, and its form is: < packet opening flag byte>< command/request byte>[parameter 1 byte] [parameter 2 bytes] ... [parameter n byte] < packet end mark byte >.
Packet opening flag byte wherein, command/request byte, packet end mark byte are necessary bytes, parameter 1 byte, parameter 2 bytes ... Parameter n byte is optional byte.
The touch screen controller information that responds to said request of data information that drive software transmits in main frame comprises 4 or 4 above bytes, and its form is: < packet opening flag byte>< request response byte>< error code byte>[parameter 1 byte] [parameter 2 bytes] ... [parameter n byte] < packet end mark byte >.
Packet opening flag byte wherein, request response byte, error code byte, packet end mark byte are necessary bytes, parameter 1 byte, parameter 2 bytes ... Parameter n byte is optional byte.
Above-mentioned packet opening flag byte is sexadecimal number 01H; Packet end mark byte is sexadecimal number 0DH.
Above-mentioned error code byte is 16 system number 30H or 31H, i.e. that expression request is correct is 30H, and that represent request error is 31H.
Above-mentioned order request byte for except that sexadecimal number 01H and the sexadecimal number the 0DH.
The command/request byte comprises any one ASCII character among alphabetical Q, d, i, R, z, t, p, X, x, K, k, C, c, W, the v, and each letter representation implication is respectively:
Q, name is called mourns in silence, and expression allows or forbids that controller is to the main frame report information;
D, name is called diagnosis, and the expression main frame is to controller request touch-screen diagnostic message;
I, name is called the touch-screen configuration information, and the expression main frame is to controller request touch-screen configuration information;
R, name is called and resets, and the expression main frame sends reset instruction to controller;
Z, name is called " sky ", and the expression main frame is replied " sky " information to the controller request;
T, name is called test, and the expression main frame is to controller request screen body of touch screen information;
P, name is called type of touch screens, and the expression main frame is to controller request type of touch screens information;
X, name is called operational factor, and the expression main frame transmits order to controller operational factor is set;
X, the expression main frame is to controller request operational factor;
K, name is called ID number, and the expression main frame transmits order to controller and is provided with ID number that controller and mapping show;
K representes main frame ID number to controller request controller and mapping demonstration, or controller is replied to response of host ID number of controller and mapping demonstration;
C, name is called calibration, and the expression main frame transmits order to controller calibration parameter is set;
C, the expression main frame is provided with calibration parameter to the controller request;
W, name is called the coordinate reporting format, and the expression main frame transmits order to controller the coordinate reporting format is set;
V, name is called controller-level, and the expression main frame is to controller request controller class information.
The response request byte comprises any one ASCII character among alphabetical d, i, z, t, p, x, k, c, the v, and each letter representation implication is respectively:
D representes that controller is to response of host answer touch-screen diagnostic message;
I representes that controller is to response of host answer touch-screen configuration information;
Z representes that controller is to response of host answer " sky " information;
T representes that controller is to response of host answer screen body of touch screen information;
P representes that controller is to response of host answer type of touch screens information;
X representes that controller replys operational factor to response of host;
K representes controller ID number to response of host answer controller and mapping demonstration;
C representes that controller is provided with calibration parameter to the response of host answer;
V representes that controller is to response of host answer controller-level information.
For example, to the order that touch screen controller transmits the ASCII character that comprises alphabetical d in the information is set, representes that then main frame is to controller request touch-screen diagnostic message like the drive software in the main frame; Controller responds to this request, and the information that sends back complex response to drive software comprises the ASCII character of alphabetical d, and then controller is replied the touch-screen diagnostic message to response of host.For another example, the drive software in the main frame is provided with the ASCII character that comprises letter C in the information to the order that touch screen controller transmits, and representes that then main frame transmits order to controller calibration parameter is provided with.
From present embodiment, can find out; Drive software and the communications protocol between the touch screen controller in the main frame not only comprise the touch coordinate data of having only 6 byte lengths of simplifying; The drive software that includes in the main frame is provided with information or request of data information to the order that touch screen controller transmits; And controller is to the information that request of data responds answer that is directed against of drive software passback; Through such method; Not only can make the speed of touch coordinate data transmission faster, and owing to transmit through the information of ordering setting, request of data and response to be replied between main frame and the controller, the action response that makes both more accurately, more effectively, fault-tolerant ability is stronger.
Claims (10)
1. the implementation method of a communication protocol of touch screen; The controller that comprises touch-screen transmits touch coordinate data to main frame; It is characterized in that; Comprise that also the drive software through being arranged in the main frame transmits command information or request of data information to said controller, and the information that responds to said request of data information that transmits to drive software of controller, said touch coordinate data is the reduced instruction structure of being made up of 6 bytes.
2. a kind of implementation method of communication protocol of touch screen according to claim 1; It is characterized in that; 6 bytes of said touch coordinate data, the low 3 bit representation touch condition of the 1st byte wherein, said touch condition comprises: " beginning to touch ", " touching continuously ", " finishing to touch ";
When expression " begin touch " state, 8 byte positions of the 1st byte are followed successively by from high to low: 1,1, be left empty, Z7, Z6,0,0,1;
When expression " touch continuously " state, 8 byte positions of the 1st byte are followed successively by from high to low: 1,1, be left empty, Z7, Z6,0,1,0;
When expression " finish touch " state, 8 byte positions of the 1st byte are followed successively by from high to low: 1,1, be left empty, Z7, Z6,1,0,0;
8 byte positions of the 2nd byte are followed successively by from high to low: 1, X12, X11, X10, X9, X8, X7, X6;
8 byte positions of the 3rd byte are followed successively by from high to low: 1, X13, X5, X4, X3, X2, X1, X0;
8 byte positions of the 4th byte are followed successively by from high to low: 1, Y12, Y11, Y10, Y9, Y8, Y7, Y6;
8 byte positions of the 5th byte are followed successively by from high to low: 1, Y13, Y5, Y4, Y3, Y2, Y1, Y0;
8 byte positions of the 6th byte are followed successively by from high to low: 1, be left empty, Z5, Z4, Z3, Z2, Z1, Z0;
In the said touch coordinate data,
The X coordinate is represented by from high to low 14 binary digits successively:
X13、X12、X11、X10、X9、X8、X7、X6、X5、X4、X3、X2、X1、X0；
The Y coordinate is represented by from high to low 14 binary digits successively:
Y13、Y12、Y11、Y10、Y9、Y8、Y7、Y6、Y5、Y4、Y3、Y2、Y1、Y0；
The Z coordinate is represented by from high to low 8 binary digits successively:
Z7、Z6、Z5、Z4、Z3、Z2、Z1、Z0。
3. a kind of implementation method of communication protocol of touch screen according to claim 1; It is characterized in that; Said drive software comprises 3 bytes at least to command information or the request of data information that controller transmits, and its form is: < packet opening flag byte>< command/request byte>< packet end mark byte >.
4. a kind of implementation method of communication protocol of touch screen according to claim 1; It is characterized in that; Said drive software is 3 above bytes to command information or the request of data information that controller transmits, and its form is: < packet opening flag byte>< command/request byte>［ parameter 1 byte ］ ［ parameter 2 bytes ］ ... ［ parameter n byte ］ < packet end mark byte >.
5. a kind of implementation method of communication protocol of touch screen according to claim 1; It is characterized in that; Said controller comprises 4 bytes at least to the information that responds to said request of data information that drive software transmits, and its form is: < packet opening flag byte>< response request byte>< error code byte>< packet end mark byte >.
6. a kind of implementation method of communication protocol of touch screen according to claim 1; It is characterized in that; Said controller comprises 4 above bytes to the information that responds to said request of data information that drive software transmits, and its form is: < packet opening flag byte>< response request byte>< error code byte>［ parameter 1 byte ］ ［ parameter 2 bytes ］ ... ［ parameter n byte ］ < packet end mark byte >.
7. like the implementation method of claim 3 or 4 or 5 or 6 said a kind of communication protocol of touch screen, it is characterized in that said packet opening flag byte is 16 system number 01H; Said packet end mark byte is 16 system number 0DH.
8. like the implementation method of claim 5 or 6 said a kind of communication protocol of touch screen, it is characterized in that said error code byte is 16 system number 30H or 31H, i.e. that expression request is correct is 30H, and that represent request error is 31H.
9. like the implementation method of claim 3 or 4 said a kind of communication protocol of touch screen; It is characterized in that; Said command/request byte comprises any one ASC II sign indicating number among alphabetical Q, d, i, R, z, t, p, X, x, K, k, C, c, W, the v, and each letter representation implication is respectively:
Q, name is called mourns in silence, and expression allows or forbids that controller is to the main frame report information;
D, name is called diagnosis, and the expression main frame is to controller request touch-screen diagnostic message;
I, name is called the touch-screen configuration information, and the expression main frame is to controller request touch-screen configuration information;
R, name is called and resets, and the expression main frame sends reset instruction to controller;
Z, name is called " sky ", and the expression main frame is replied " sky " information to the controller request;
T, name is called test, and the expression main frame is to controller request screen body of touch screen information;
P, name is called type of touch screens, and the expression main frame is to controller request type of touch screens information;
X, name is called operational factor, and the expression main frame transmits order to controller operational factor is set;
X, the expression main frame is to controller request operational factor;
K, name is called ID number, and the expression main frame transmits order to controller and is provided with ID number that controller and mapping show;
K representes main frame ID number to controller request controller and mapping demonstration, or controller is replied to response of host ID number of controller and mapping demonstration;
C, name is called calibration, and the expression main frame transmits order to controller calibration parameter is set;
C, the expression main frame is provided with calibration parameter to the controller request;
W, name is called the coordinate reporting format, and the expression main frame transmits order to controller the coordinate reporting format is set;
V, name is called controller-level, and the expression main frame is to controller request controller class information.
10. like the implementation method of claim 5 or 6 said a kind of communication protocol of touch screen, it is characterized in that said response request byte comprises any one ASC II sign indicating number among alphabetical d, i, z, t, p, x, k, c, the v, each letter representation implication is respectively:
D representes that controller is to response of host answer touch-screen diagnostic message;
I representes that controller is to response of host answer touch-screen configuration information;
Z representes that controller is to response of host answer " sky " information;
T representes that controller is to response of host answer screen body of touch screen information;
P representes that controller is to response of host answer type of touch screens information;
X representes that controller replys operational factor to response of host;
K representes controller ID number to response of host answer controller and mapping demonstration;
C representes that controller is provided with calibration parameter to the response of host answer;
V representes that controller is to response of host answer controller-level information.
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| JP3252464B2 (en) * | 1992-08-26 | 2002-02-04 | 富士通株式会社 | Virtual computer system |
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