CN114625513A - Ultra-high-speed writing response system and method for infrared touch screen - Google Patents
Ultra-high-speed writing response system and method for infrared touch screen Download PDFInfo
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Abstract
本发明公开了一种红外触摸屏超高速书写响应系统及方法，包括控制处理单元和A/D转换单元，其中控制处理单元与A/D转换单元连接，其中A/D转换单元连接有RS232数据转换接口，通过RS232数据转换接口与红外触摸屏的数据接口连接。首先将主控模块RS‑232查询接收和更新控制数据的任务周期缩短；再将更新触点数据的功能移植到查询接收RS‑232的任务中；采用中断方式处理RS‑232通讯，在中断服务函数中处理RS‑232数据同时将触点数据发送到图形处理模块；最后减少红外扫描每个灯管的工作时间、减少灯管个数缩短红外触摸屏处理时间。本发明有效减少了延时的时间。
The invention discloses an infrared touch screen ultra-high-speed writing response system and method, comprising a control processing unit and an A/D conversion unit, wherein the control processing unit is connected with the A/D conversion unit, and the A/D conversion unit is connected with an RS232 data conversion unit The interface is connected with the data interface of the infrared touch screen through the RS232 data conversion interface. First, shorten the task cycle of the main control module RS-232 to query and receive and update control data; then transplant the function of updating contact data to the task of querying and receiving RS-232; In the function, the RS‑232 data is processed and the contact data is sent to the graphics processing module; finally, the working time of each lamp tube for infrared scanning is reduced, the number of lamps is reduced, and the processing time of the infrared touch screen is shortened. The present invention effectively reduces the delay time.
Description
技术领域technical field
本发明涉及红外触摸屏技术领域，具体为一种红外触摸屏超高速书写响应系统及方法。The invention relates to the technical field of infrared touch screens, in particular to an ultra-high-speed writing response system and method for an infrared touch screen.
背景技术Background technique
红外触摸屏是利用X、Y方向上密布的红外线矩阵来检测并定位人的触摸手势的电子设备。红外触摸屏在显示器的前面安装一个电路板外框，电路板在屏幕四边排布红外发射管和红外接收管，一一对应形成横竖交叉的红外线矩阵。手指在触摸屏幕时，就会挡住经过该位置的横竖两条红外线，因而可以判断出触摸点在屏幕的坐标位置。任何非透明物体都可改变触点上的红外线而实现触摸屏操作。An infrared touch screen is an electronic device that detects and locates people's touch gestures by using a densely distributed infrared matrix in the X and Y directions. The infrared touch screen is installed with a circuit board frame in front of the display, and the circuit board is arranged with infrared emission tubes and infrared receiving tubes on the four sides of the screen, forming a horizontal and vertical infrared matrix in one-to-one correspondence. When the finger touches the screen, it will block the horizontal and vertical infrared rays passing through the position, so the coordinate position of the touch point on the screen can be determined. Any non-transparent object can change the infrared rays on the contact to realize touch screen operation.
由于传统的均是采用RS232数据传输的红外触摸屏均会有一个响应的过程，按照传统的响应设置，存在响应时间长，延迟大灯弊端。所以就需要一种红外触摸屏超高速书写响应系统及方法。Since the traditional infrared touch screens that use RS232 data transmission all have a response process, according to the traditional response settings, there are disadvantages of long response time and delayed headlights. Therefore, there is a need for an ultra-high-speed writing response system and method for an infrared touch screen.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于提供一种红外触摸屏超高速书写响应系统及方法，The purpose of the present invention is to provide an infrared touch screen ultra-high-speed writing response system and method,
本发明是这样实现的：The present invention is realized in this way:
一种红外触摸屏超高速书写响应系统及方法，包括控制处理单元和A/D转换单元，其中控制处理单元与A/D转换单元连接，其中A/D转换单元连接有RS232数据转换接口，通过RS232数据转换接口与红外触摸屏的数据接口连接。An infrared touch screen ultra-high-speed writing response system and method, comprising a control processing unit and an A/D conversion unit, wherein the control processing unit is connected with the A/D conversion unit, wherein the A/D conversion unit is connected with an RS232 data conversion interface, and through the RS232 The data conversion interface is connected with the data interface of the infrared touch screen.
进一步，具体按以下步骤执行：Further, follow the steps below:
S1:将主控模块RS-232查询接收和更新控制数据的任务周期缩短；S1: shorten the task period of the main control module RS-232 query reception and update control data;
S2:将更新触点数据的功能移植到查询接收RS-232的任务中；S2: Transplant the function of updating contact data into the task of querying and receiving RS-232;
S3:采用中断方式处理RS-232通讯，在中断服务函数中处理RS-232数据同时将触点数据发送到图形处理模块；S3: use the interrupt method to process RS-232 communication, process RS-232 data in the interrupt service function and send the contact data to the graphics processing module;
S4:减少红外扫描每个灯管的工作时间、减少灯管个数缩短红外触摸屏处理时间。S4: Reduce the working time of each lamp for infrared scanning, reduce the number of lamps, and shorten the processing time of the infrared touch screen.
进一步，红外触摸屏超高速书写响应分为10个阶段，分别为P1红外行列扫描、P2触点处理并发送、P33触点到主控模块的总线传输、P4主控模块触点接收处理、P5主控模块计算和设置画面参数、P6触点到图形处理模块的总线传输、P7图形处理模块对数据的接收处理、P8图形处理、P9视频信号传输和P10图形显示。Further, the ultra-high-speed writing response of the infrared touch screen is divided into 10 stages, which are P1 infrared row and column scanning, P2 contact processing and sending, bus transmission from P33 contact to the main control module, P4 main control module contact receiving and processing, P5 main control module. The control module calculates and sets the picture parameters, the bus transmission from the P6 contact to the graphics processing module, the receiving and processing of the data by the P7 graphics processing module, the P8 graphics processing, the P9 video signal transmission and the P10 graphics display.
任务P1和P2循环执行，执行周期(T)和执行时间(t)相同，需处理的事件在t1时刻或t2时刻发生时，均只有在下一周期才能得到处理，即在T2时刻完成处理，因此某事件发生到必定处理完成所需的最大时间TmaxT×2＝T+t＝T×2；Tasks P1 and P2 are executed cyclically, and the execution period (T) and execution time (t) are the same. When the event to be processed occurs at time t1 or time t2, it can only be processed in the next cycle, that is, the processing is completed at time T2, so The maximum time TmaxT×2=T+t=T×2 from the occurrence of an event to the completion of certain processing;
任务执行的周期为T，任务执行时间为t，t＜T，事件在t1时刻或t2时刻发生时，均能在下一周期得到处理，即(T1+t)时刻完成，因此事件发生到处理完成的最大时间Tmax＝T+t；The period of task execution is T, and the task execution time is t, t<T. When the event occurs at time t1 or time t2, it can be processed in the next cycle, that is, at time (T1+t), so the event occurs until the processing is completed. The maximum time Tmax=T+t;
传输过程延时主要产生在P3、P6、P9过程，P6过程延时时间很短，可忽略不计；P9过程时间由液晶屏视频刷新率确定，不可变更；因此可通过提高波特率减小P3过程执行时间，RS-232波特率最高为115200bps，因此P3执行时间可减小为约1.4ms。The transmission process delay mainly occurs in the P3, P6, and P9 processes. The P6 process delay time is very short and can be ignored. The P9 process time is determined by the LCD screen video refresh rate and cannot be changed. Therefore, the P3 process can be reduced by increasing the baud rate. The process execution time, the RS-232 baud rate is up to 115200bps, so the P3 execution time can be reduced to about 1.4ms.
周期任务执行时间主要产生在P4、P5过程，缩短周期任务执行的时间可采用如下3种方法：The execution time of periodic tasks is mainly generated in the P4 and P5 processes. The following three methods can be used to shorten the execution time of periodic tasks:
(a)缩短任务执行周期(a) Shorten the task execution cycle
将主控模块rs-232查询接收和更新控制数据的任务周期缩短。该方法可以减少P4、P5的过程延时，但会影响主控模块上其他周期任务的执行，因此该方法不予采用。Shorten the task period of the main control module rs-232 query, receive and update control data. This method can reduce the process delay of P4 and P5, but will affect the execution of other periodic tasks on the main control module, so this method is not used.
(b)合并任务，减少过程(b) Combine tasks, reduce process
将更新触点数据的功能移植到查询接收RS-232的任务中，即将P5过程与P4过程合并。该方法能够减小P4、P5过程的延时，缩短触摸响应时间20ms且不会影响软件的功能和性能。The function of updating contact data is transplanted into the task of querying and receiving RS-232, that is, merging the P5 process with the P4 process. The method can reduce the delay of the P4 and P5 processes, shorten the touch response time by 20ms, and will not affect the function and performance of the software.
(c)中断处理(c) Interrupt handling
采用中断方式处理Rs-232通讯，在中断服务函数中处理RS-232数据同时将触点数据发送到图形处理模块。该方法可以缩短触摸响应时间20ms且不会影响软件的功能和性能。The Rs-232 communication is processed in an interrupt mode, and the RS-232 data is processed in the interrupt service function while the contact data is sent to the graphics processing module. This method can shorten the touch response time by 20ms without affecting the function and performance of the software.
进一步，红外触摸屏负责完成过程P1和P2，连续不断的周期执行，P1和P2之间没有时间间隙；P3为数据在总线上传输过程，具体RS-232信号进行总线传输；P4和P5为主控模块上运行的两个周期任务，任务周期均为20ms；P6为数据从总线发送到图形处理模块的过程，本发明通过cpci总线进行数据传输；P7和P8在图形处理模块上处理，两个环节循环执行，无时间间隔；P9为视频传输过程，具体为LVDS信号；P10为液晶显示屏刷新图像的过程。Further, the infrared touch screen is responsible for completing the processes P1 and P2, which are executed continuously, and there is no time gap between P1 and P2; P3 is the data transmission process on the bus, and the specific RS-232 signal is used for bus transmission; P4 and P5 are the main control The two periodic tasks running on the module have a task cycle of 20ms; P6 is the process of sending data from the bus to the graphics processing module, and the present invention performs data transmission through the cpci bus; P7 and P8 are processed on the graphics processing module, two links Loop execution, no time interval; P9 is the video transmission process, specifically the LVDS signal; P10 is the process of refreshing the image on the LCD screen.
与现有技术相比，本发明的有益效果是：计算出了响应时间，为了提高响应速度，对任务处理进行了优化，通过提高RS-232的波特率、中断实时接收处理触点数据和合并任务的方法，触摸响应的最大延时时间可缩短约37.5ms，优化后的延时约为89.5ms，满足指标不大于100ms的要求。Compared with the prior art, the present invention has the beneficial effects that the response time is calculated, the task processing is optimized in order to improve the response speed, and the contact data and contact data are received and processed in real time by increasing the baud rate of RS-232, interrupting the real-time reception and processing. With the method of combining tasks, the maximum delay time of touch response can be shortened by about 37.5ms, and the optimized delay time is about 89.5ms, which meets the requirement of not more than 100ms.
附图说明Description of drawings
为了更清楚地说明本发明实施方式的技术方案，下面将对实施方式中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本发明的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。In order to explain the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.
图1是本发明的触摸响应流程图；Fig. 1 is the touch response flow chart of the present invention;
图2是本发明的延时任务分析图；Fig. 2 is the time delay task analysis diagram of the present invention;
图3是本发明的周期任务延时分析图。FIG. 3 is an analysis diagram of the periodic task delay of the present invention.
具体实施方式Detailed ways
为使本发明实施方式的目的、技术方案和优点更加清楚，下面将结合本发明实施方式中的附图，对本发明实施方式中的技术方案进行清楚、完整地描述，显然，所描述的实施方式是本发明一部分实施方式，而不是全部的实施方式。基于本发明中的实施方式，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式，都属于本发明保护的范围。因此，以下对在附图中提供的本发明的实施方式的详细描述并非旨在限制要求保护的本发明的范围，而是仅仅表示本发明的选定实施方式。基于本发明中的实施方式，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式，都属于本发明保护的范围。In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
请参阅图1-3，一种红外触摸屏超高速书写响应系统及方法，包括控制处理单元和A/D转换单元，其中控制处理单元与A/D转换单元连接，其中A/D转换单元连接有RS232数据转换接口，通过RS232数据转换接口与红外触摸屏的数据接口连接。1-3, an infrared touch screen ultra-high-speed writing response system and method, including a control processing unit and an A/D conversion unit, wherein the control processing unit is connected with the A/D conversion unit, wherein the A/D conversion unit is connected with The RS232 data conversion interface is connected to the data interface of the infrared touch screen through the RS232 data conversion interface.
本实施例中，具体按以下步骤执行：In this embodiment, the specific steps are as follows:
S1:将主控模块RS-232查询接收和更新控制数据的任务周期缩短；S1: shorten the task period of the main control module RS-232 query reception and update control data;
S2:将更新触点数据的功能移植到查询接收RS-232的任务中；S2: Transplant the function of updating contact data into the task of querying and receiving RS-232;
S3:采用中断方式处理RS-232通讯，在中断服务函数中处理RS-232数据同时将触点数据发送到图形处理模块；S3: use the interrupt method to process RS-232 communication, process RS-232 data in the interrupt service function and send the contact data to the graphics processing module;
S4:减少红外扫描每个灯管的工作时间、减少灯管个数缩短红外触摸屏处理时间。S4: Reduce the working time of each lamp for infrared scanning, reduce the number of lamps, and shorten the processing time of the infrared touch screen.
本实施例中，红外触摸屏超高速书写响应分为10个阶段，分别为P1红外行列扫描、P2触点处理并发送、P33触点到主控模块的总线传输、P4主控模块触点接收处理、P5主控模块计算和设置画面参数、P6触点到图形处理模块的总线传输、P7图形处理模块对数据的接收处理、P8图形处理、P9视频信号传输和P10图形显示。In this embodiment, the ultra-high-speed writing response of the infrared touch screen is divided into 10 stages, which are P1 infrared row and column scanning, P2 contact processing and sending, P33 contact to the main control module bus transmission, P4 main control module contact receiving processing , P5 main control module to calculate and set picture parameters, P6 contact to graphics processing module bus transmission, P7 graphics processing module to receive data processing, P8 graphics processing, P9 video signal transmission and P10 graphics display.
任务P1和P2循环执行，执行周期(T)和执行时间(t)相同，需处理的事件在t1时刻或t2时刻发生时，均只有在下一周期才能得到处理，即在T2时刻完成处理，因此某事件发生Tasks P1 and P2 are executed cyclically, and the execution period (T) and execution time (t) are the same. When the event to be processed occurs at time t1 or time t2, it can only be processed in the next cycle, that is, the processing is completed at time T2, so an event occurs
到必定处理完成所需的最大时间TmaxT×2＝T+t＝T×2；The maximum time TmaxT×2=T+t=T×2 required to complete the certain processing;
任务执行的周期为T，任务执行时间为t，t＜T，事件在t1时刻或t2时刻发生时，均能在下一周期得到处理，即(T1+t)时刻完成，因此事件发生到处理完成的最大时间Tmax＝T+t；The period of task execution is T, and the task execution time is t, t<T. When the event occurs at time t1 or time t2, it can be processed in the next cycle, that is, at time (T1+t), so the event occurs until the processing is completed. The maximum time Tmax=T+t;
传输过程延时主要产生在P3、P6、P9过程，P6过程延时时间很短，可忽略不计；P9过程时间由液晶屏视频刷新率确定，不可变更；因此可通过提高波特率减小P3过程执行时间，RS-232波特率最高为115200bps，因此P3执行时间可减小为约1.4ms。The transmission process delay mainly occurs in the P3, P6, and P9 processes. The P6 process delay time is very short and can be ignored. The P9 process time is determined by the LCD screen video refresh rate and cannot be changed. Therefore, the P3 process can be reduced by increasing the baud rate. The process execution time, the RS-232 baud rate is up to 115200bps, so the P3 execution time can be reduced to about 1.4ms.
周期任务执行时间主要产生在P4、P5过程，缩短周期任务执行的时间可采用如下3种方法：The execution time of periodic tasks is mainly generated in the P4 and P5 processes. The following three methods can be used to shorten the execution time of periodic tasks:
(a)缩短任务执行周期(a) Shorten the task execution cycle
将主控模块rs-232查询接收和更新控制数据的任务周期缩短。该方法可以减少P4、P5的过程延时，但会影响主控模块上其他周期任务的执行，因此该方法不予采用。Shorten the task period of the main control module rs-232 query, receive and update control data. This method can reduce the process delay of P4 and P5, but will affect the execution of other periodic tasks on the main control module, so this method is not used.
(b)合并任务，减少过程(b) Combine tasks, reduce process
将更新触点数据的功能移植到查询接收RS-232的任务中，即将P5过程与P4过程合并。该方法能够减小P4、P5过程的延时，缩短触摸响应时间20ms且不会影响软件的功能和性能。The function of updating contact data is transplanted into the task of querying and receiving RS-232, that is, merging the P5 process with the P4 process. The method can reduce the delay of the P4 and P5 processes, shorten the touch response time by 20ms, and will not affect the function and performance of the software.
(c)中断处理(c) Interrupt handling
采用中断方式处理Rs-232通讯，在中断服务函数中处理RS-232数据同时将触点数据发送到图形处理模块。该方法可以缩短触摸响应时间20ms且不会影响软件的功能和性能。The Rs-232 communication is processed in an interrupt mode, and the RS-232 data is processed in the interrupt service function while the contact data is sent to the graphics processing module. This method can shorten the touch response time by 20ms without affecting the function and performance of the software.
本实施例中，红外触摸屏负责完成过程P1和P2，连续不断的周期执行，P1和P2之间没有时间间隙；P3为数据在总线上传输过程，具体RS-232信号进行总线传输；P4和P5为主控模块上运行的两个周期任务，任务周期均为20ms；P6为数据从总线发送到图形处理模块的过程，本发明通过cpci总线进行数据传输；P7和P8在图形处理模块上处理，两个环节循环执行，无时间间隔；P9为视频传输过程，具体为LVDS信号；P10为液晶显示屏刷新图像的过程In this embodiment, the infrared touch screen is responsible for completing the processes P1 and P2, which are executed continuously and periodically, and there is no time gap between P1 and P2; P3 is the data transmission process on the bus, and the specific RS-232 signal is used for bus transmission; P4 and P5 There are two periodic tasks running on the main control module, and the task cycle is 20ms; P6 is the process of sending data from the bus to the graphics processing module, and the present invention performs data transmission through the cpci bus; P7 and P8 are processed on the graphics processing module, The two links are executed cyclically without time interval; P9 is the video transmission process, specifically the LVDS signal; P10 is the process of refreshing the image on the LCD screen
以上所述仅为本发明的优选实施方式而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
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