CN103336612B - Touch screen control system based on serial communication and ARM embedded processing systems - Google Patents
Touch screen control system based on serial communication and ARM embedded processing systems Download PDFInfo
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- CN103336612B CN103336612B CN201310250572.0A CN201310250572A CN103336612B CN 103336612 B CN103336612 B CN 103336612B CN 201310250572 A CN201310250572 A CN 201310250572A CN 103336612 B CN103336612 B CN 103336612B
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Abstract
The invention discloses a kind of touch screen control system based on serial communication and ARM embedded processing systems.This system includes ARM and processes chip, serial ports transmitting-receiving control chip, nand flash memory, mobile DDR, LCD interface, the ARM embedded processing plate of USB interface, serial ports touch screen panel and touch panel device.Serial ports touch screen panel sends user operation signal to ARM embedded processing plate with serial data report form, ARM embedded processing plate carries out data communication by serial ports and signal handling equipment, then passes through the software system being loaded on ARM process chip and is shown on interface by result data.It is an advantage of the current invention that: by the mode of low cost, traditional display operation scrap build is become the operation equipment with touch screen input function, simultaneously without changing the hardware structure of original process system, just can play the operational advantage that touch screen is directly perceived, easy-to-use.
Description
Technical field
The present invention relates to a kind of touch screen control system, be specifically related to a kind of touch screen control system based on serial communication and ARM embedded processing systems.It is applicable to carry out low cost to traditional mouse-operated equipment and quickly add the application of touch screen function.
Background technology
Now, along with the development of touch screen technology and universal, increasing user to this novelty, easily man-machine interaction mode please oneself.Therefore, a lot of user oriented operation equipment, in order to improve user's experience, consider to add touch screen technology when product up-gradation and the replacement.If the software and hardware system of existing device is re-started exploitation, it is possible to can spend long time, and expend huge human and material resources, particularly when the exploitation of existing equipment depends on multiparty collaboration, the research and development expense of new equipment will be greatly increased.In order to adapt to the user demand of active user and reduce the development cost of new equipment, the present invention proposes the touch screen control system based on serial communication and ARM Embedded Hardware Platform, utilize touch screen technology, serial port communication technology, the cross-platform interface development technology of QT, the human-computer interaction function of equipment and core calculations process function are separated a human-computer interaction function and realized in this system platform, and use serial port protocol to carry out communication between two big funtion parts, thus on the hardware configuration basis not changing existing equipment, realize the quickly upgrading of product or the quick checking of new research and development functions of the equipments.
Summary of the invention
It is an object of the invention to provide a kind of touch screen control system based on serial communication and ARM embedded processing systems, traditional mouse input operation scrap build is become the equipment with touch screen input function, solves the low cost of legacy equipment mode of operation, upgrade problem efficiently.
The system of the present invention includes ARM embedded processing plate (comprise ARM and process chip, serial ports transmitting-receiving control chip, nand flash memory, mobile DDR, LCD interface and USB interface), serial ports touch screen panel and touch screen.
Described ARM embedded processing plate includes ARM and processes chip, serial ports transmitting-receiving control chip, nand flash memory, mobile DDR, LCD interface and USB interface, its concrete configuration is: the process chip of ARM11 framework, it is equipped with mobile DDR internal memory more than 256M byte and more than 1.5G byte N AND flash memory, has the RS-232 serial line interface of usb protocol interface, LCD interface and more than 2；ARM embedded processing plate is mounted with the driver of system bootstrap routine, linux embedded OS, USB, LCD, serial line interface and touch screen, and comprises the user-interface application program of serial ports transmitting-receiving operation, interface display/renewal, inter-process；
Described serial ports touch screen panel adopts input to be 4-line, the signal of the capacitor type of 5-line, 8-line or resistive type touch screen, is output as meeting the panel of RS-232 serial interface protocol specification；
Described touch screen adopts and shows that interface is output as 4-line, 5-line, the capacitor type of 8-line or resistive type touch screen with color LCD；
User operation signal on the touch screen of input is converted to form of datagrams by the serial ports touch screen panel of system, exports to ARM embedded processing plate through serial ports；User operation is carried out concrete manipulation response by the software system being loaded on ARM process chip by ARM embedded processing plate；Meanwhile, ARM embedded processing plate carries out data communication by serial ports and signal handling equipment, and the requirement of user is sent to signal handling equipment the result data of the signal handling equipment received, and updates and is shown on interface.
The present invention has the advantage that three below is main:
1 R&D costs are low, the time cycle is short.In order to the interpolation touch screen function of legacy equipment, the hardware configuration of original signal handling equipment need not be modified by native system, just can add the function of touch screen, and the driver of touch screen need not be developed according to original system, so can be substantially reduced cost and the time cycle of exploitation.Additionally, this patent system is also used as the fast verification of systemic-function and the interstage product of equipment replacement transformation.
2 strong adaptabilities, expansion are easily.Owing to this patent system is connected with signal processor by serial line interface, if therefore can support serial line interface the circuit board with processor can both as signal processor, such as general purpose computer, dsp processor, FPGA, single-chip microcomputer etc..Further, system have employed powerful ARM embedded processing chip, the expansion of the aspect such as multimedia, network can also be carried out except the household function of narration in patent.
3 touch screens have sturdy and durable, the saving feature such as space, directly perceived, good man-machine communication.Owing to having any of the above advantage, touch screen is as a kind of brand-new multimedia interactive carrier and good Consumer's Experience equipment so that increasing system considers to use it when upgrading and the replacement.
Accompanying drawing explanation
The hardware structure diagram of Fig. 1 system.
Fig. 2 ARM embedded processing hardens composition.
Fig. 3 ARM processes system on a chip software architecture diagram.
Detailed description of the invention
Aspect built by the hardware of system:
First it is ARM embedded processing plate (accompanying drawing 2), adopts the ARM chip of Samsung S3C6410 as important processor.This chip is the RSIC processor of a low-power consumption of Samsung's release, high performance-price ratio；It has abundant internal resource and powerful video processing capabilities based on ARM11 core A RM1176JZF-S framework, also supports mobile DDR and multiple nand flash memory；It can stable operation in the basic frequency of more than 667MHz, be integrated with multiple interfaces, such as composite video signal, photographic head, USB, SD card, LCD liquid crystal display screen, Ethernet etc., support maximum 4 serial line interfaces simultaneously；It additionally provides the external memory interface of optimization, can meet the data bandwidth requirement in high-speed communication.Due to the performance that these are prominent, it is widely used in the field such as mobile phone and general procedure.On ARM embedded processing plate, processing chip for ARM and be equipped with mobile DDR internal memory and the 2G byte N AND flash memory of 2 128M bytes, main memory and data storage when they run respectively as systems soft ware use.
Serial ports control chip adopts the MAX3232 chip of MAXIM company, equipped with 2 transceivers supporting pure RS-232 serial port protocol, and all can normal operation in 3.0V～5.5V voltage range.Serial line interface in system all adopts the serial port connector of 9 pin D types.
Secondly, touch screen panel uses PenMount company 9000CH type panel, inputting for 4-line, 5-line and 8-line resistance type touch screen, carry out the Frame output of the RS-232 serial line interface of 19200 baud rates, this panel can support the touch resolution of maximum 2048 × 2048.Touch screen panel adopts the AVR microprocessor of atmel corp ATMEGA8L type high efficiency, low-power consumption, completes the collection of the analogue signal of touch screen, analog digital conversion and data framing output.This microprocessor uses enhanced edition RISC Architecture, highest point reason ability is 16MIPS(clock frequency 16MHz), the programmable program storage of built-in 8kB, 512 byte EEPROM, 1KB internal SRAM, two 8bit intervalometers, 8 passages the abundant hardware resource such as 10bit precision analog-digital converter (ADC).Touch screen panel also uses the SP232AEN chip of SIPEX, carries out meeting the data output of the 120kbps speed of RS-232 serial port protocol.
Again, touch screen adopts 10.4 cun of resistance touch boards of 5-line, and display is the TFT color display of 10.4 cun of company of Youda, LCD interface, resolution 800 × 600.
The software kit system aspects of ARM embedded processing plate in system:
In software architecture (accompanying drawing 3), what first start after powering on is system bootstrap routine, then the operation of system resource is administered by operating system, the driver of USB, serial ports, display and touch screen is performed in interface driver part, restart user interface program, the various operational requirements of response user.
System guides loader (Bootloader) adopts the program's source code of Uboot1.1.6 version.U-Boot(UniversalBootloader), it is in compliance with the source code project that GPL clause is open, for providing hardware asset information when processing plate hardware initialization, thus guiding, loading the firmware program that embedded OS runs.It undertakes the guiding work of embedded Linux system.
(SuSE) Linux OS adopts the core system of 2.6.36 version.Owing to the peripheral hardware interface in native system pertains only to USB, serial line interface, LCD display and touch screen, thus can only retain the driver of USB, serial line interface, LCD display and touch screen in outside interface section, with the function of Simplified kernel.
User interface program, is based on the design of Qt4.8.2 storehouse in the Cross-border congestion management environment of QTCreator.It can be divided into three module serial ports transmitting-receiving operation modules, interfaces response/more new module and internal processing modules according to function.The data message of coming is sent when receiving signal processor on serial ports, user interface program calls " serial ports transmitting-receiving operation module " to carry out data parsing and is submitted to " internal processing modules ", then the concrete meaning according to data, performs corresponding operation (such as: parameter renewal, interface renewal etc.)；When user interface program receives user's operation on interface, call " interface response/more new module " to respond, process subsequently into " internal processing modules ", and according to concrete operation content, can be sent datagram to signal processor by " serial ports transmitting-receiving operation module ", it is also possible to updated the display at interface by " interface response/more new module ".
Claims (1)
1. based on a touch screen control system for serial communication and ARM embedded processing systems, including ARM embedded processing plate, serial ports touch screen panel and touch screen, it is characterised in that:
Described ARM embedded processing plate includes ARM and processes chip, serial ports transmitting-receiving control chip, nand flash memory, mobile DDR internal memory, LCD interface and USB interface, its concrete configuration is: the process chip of ARM11 framework, it is equipped with the DDR internal memory of 2 128M bytes and the nand flash memory of 2G byte, has usb protocol interface, LCD interface and 2 RS-232 serial line interfaces；ARM embedded processing plate is mounted with the driver of system bootstrap routine, linux embedded OS, USB interface, LCD interface, RS-232 serial line interface and touch screen, and comprises the user-interface application program of serial ports transmitting-receiving operation, interface display/renewal, inter-process；
Described serial ports touch screen panel adopts connectivity port to be 4-line, 5-line, the resistive type touch screen interface of 8-line or capacitive touch screen interface, and meets the panel of RS-232 serial interface protocol specification；
Described touch screen adopts and shows that interface is output as 4-line, 5-line, the resistive type touch screen of 8-line or capacitive touch screen with color LCD；
User operation signal on the touch screen of input is converted to form of datagrams by the serial ports touch screen panel of touch screen control system, exports to ARM embedded processing plate through serial ports；User operation is carried out concrete manipulation response by the software system being loaded on ARM process chip by ARM embedded processing plate；Meanwhile, ARM embedded processing plate carries out data communication by serial ports and signal handling equipment, the requirement of user is sent to signal handling equipment, and the data received from signal handling equipment renewal is shown on interface.
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| CN104808961B (en) * | 2015-05-15 | 2017-11-10 | 武汉精测电子技术股份有限公司 | The scripting adjusting method of display interface module parameter |
| CN111488228A (en) * | 2019-01-25 | 2020-08-04 | 上海原品网络科技有限公司 | Embedded game system |
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| CN200986700Y (en) * | 2006-10-26 | 2007-12-05 | 比亚迪股份有限公司 | Four wire system resistor type touch screen testing circuit |
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| KR101097837B1 (en) * | 2010-06-29 | 2011-12-23 | 이지넷소프트(주) | Touch screen apparatus using human interface device and operating method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN200986700Y (en) * | 2006-10-26 | 2007-12-05 | 比亚迪股份有限公司 | Four wire system resistor type touch screen testing circuit |
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| Title |
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| ARM HMS30C7202与触摸屏接口电路的设计;王洪等;《微计算机信息》;20070120;第23卷(第1-2期);第52，166-167页 * |
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