CN112596430A - Handwriting board circuit for accurate display of electronic book - Google Patents
Handwriting board circuit for accurate display of electronic book Download PDFInfo
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- CN112596430A CN112596430A CN202011409239.6A CN202011409239A CN112596430A CN 112596430 A CN112596430 A CN 112596430A CN 202011409239 A CN202011409239 A CN 202011409239A CN 112596430 A CN112596430 A CN 112596430A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
Abstract
The invention discloses a handwriting board circuit for accurately displaying an electronic book, wherein a system chip adopts an STM32F105RB chip, the circuit is divided into a power circuit, a wireless module circuit, a clock circuit, an alarm circuit, an LED indicator light circuit, an OLED display circuit, a BOOT circuit, a switch circuit, an A/D conversion circuit and a touch interface circuit, the power circuit is an independent circuit and consists of two three-terminal voltage regulators U7 and U8, the power circuit adopts a mode that 12V is subjected to voltage division, voltage stabilization and filtering to obtain 5V and 3.3V power supplies, the wireless module circuit, the clock circuit, the alarm circuit, the LED indicator light circuit, the OLED display circuit, the BOOT circuit, the switch circuit, the A/D conversion circuit and the touch interface circuit are divergently connected by taking the system chip as a center to record the motion direction of a pen point X, Y, so that the problem of writing distortion existing in the traditional pressure sensing mode of a resistance screen is avoided, has good market application prospect.
Description
Technical Field
The invention relates to the field of electronic handwriting boards, in particular to a handwriting board circuit for accurately displaying an electronic book.
Background
With the continuous progress of science and technology and society, electronic books are favored by many users due to the characteristics of energy conservation, environmental protection, low price, convenient storage and the like, and digital information equipment has a track input function which usually adopts a handwriting input mode. The traditional handwriting pen outputs graphs on a screen depending on which resistance screen generates pressure, but the input mode has high requirements on a pressure sensing system of the screen, and when the traditional handwriting pen receives pressure generated by a non-handwriting pen, the input graphs and characters are easy to deform, so that the accuracy of the graphs and characters is influenced. Especially in documents with high requirements for text accuracy, text distortion can affect the effectiveness of the document.
Disclosure of Invention
In order to overcome the problems of insufficient human-computer interaction and writing distortion, the invention provides a handwriting board circuit for accurate display of an electronic book, wherein the handwriting board circuit is connected with an ADS7843 chip through a touch screen interface, the touch screen generates X-axis and Y-axis motion signals, and the ADS7843 sampling analog-to-digital converter transmits the signals to a system chip for processing.
The technical scheme provided by the invention is that a handwriting board circuit for accurate display of an electronic book is characterized in that a system chip adopts an STM32F105RB chip, the circuit is divided into a power supply circuit, a wireless module circuit, a clock circuit, an alarm circuit, an LED indicator light circuit, an OLED display circuit, a BOOT circuit, a switch circuit, an A/D conversion circuit and a touch interface circuit, the power supply circuit is an independent circuit and consists of two three-terminal U7 and U8, the power supply circuit adopts 12V power supplies obtained by voltage division, voltage stabilization and filtering, and the wireless module circuit, the clock circuit, the alarm circuit, the LED indicator light circuit, the OLED display circuit, the BOOT circuit, the switch circuit, the A/D conversion circuit and the touch interface circuit are in divergent connection by taking the system chip as a center.
Furthermore, the wireless module circuit is composed of a chip NRF2401, the chip NRF2401 integrates devices such as a frequency synthesizer, a power amplifier, a crystal oscillator, a modulator and the like, six ports connected with the system chip are provided, pins 5, 6 and 7 of the chip NRF2401 are respectively connected with pins PB8, PB7 and PB6 of the system chip, pins 2, 3 and 4 of the chip NRF2401 are respectively connected with pins PC8, PC9 and PB5 of the system chip, and the chip NRF2401 adjusts the system to enter a standby mode, a transmission mode and a reception mode.
Two pins of a crystal oscillator X1 IN a clock circuit are respectively connected with an OSC _ IN pin and an OSC _ OUT pin of a system chip, a switch circuit is connected with a PC10 pin of the system chip, a diode IN an LED indicating lamp circuit is connected with a PB15 pin of the system chip, an alarm circuit comprises a triode Q1 and a buzzer B1, the base of the triode Q1 is connected with a PC6 pin of the system chip, the collector of the triode Q1 is connected with +5V voltage, the emitter of the triode Q1 is connected with a buzzer B1, pins 1 and 2 of a chip Header 3X2 IN a BOOT circuit are connected with +3V voltage, pins 3 and 4 are respectively connected with BOOT0 and BOOT1 pins of the system chip, and pins 5 and 6 are grounded.
Furthermore, the touch interface circuit comprises a chip ADS7843 and a touch screen interface JMPT, the chip ADS7843 is connected with secondary connection system chips PC1, PC2, PC3, PC4, PC5 and PC6 through 16 pins, 15 pins, 14 pins, 13 pins, 12 pins and 11 pins, pins 1, 2, 3 and 4 of the touch screen interface are respectively connected with Y-, X-, Y + and X + pins of the chip ADS7843, the touch screen generates X-axis and Y-axis motion signals, and the sampling analog-to-digital converter of the chip ADS7843 transmits the signals to the system chips for processing.
Furthermore, the OLED display circuit includes a display screen OLED1, where the CS pin, the RST pin, the D/C pin, the D0, and the D1 pin of the display screen OLED1 are respectively connected to the PA8, the PA9, the PA10, the PB10, and the PB11 pins of the system chip, and the system chip performs data transmission with the OLED display screen by controlling the five ports, so that the content to be displayed can be projected onto the screen of the OLED display screen.
Further, the A/D conversion circuit comprises a chip TLC549CD, three identical three-terminal comparators U5, U6, U7 and a five-terminal comparator U3, the stylus JP1 transmits touch signals to an analog/digital conversion module consisting of the comparators, the analog/digital conversion principle system is used for amplifying, filtering and comparing the signals, the converted digital signals are input to a 2-pin of the chip TLC549CD, and pins 5, 6 and 7 of the chip TLC549CD are respectively connected with pins PC0, PB1 and PB0 of the system chip.
The invention has the beneficial effects that: the touch screen generates X-axis and Y-axis motion signals, the ADS7843 sampling analog-to-digital converter transmits the signals to the system chip for processing, the motion track of the stylus can be fed back accurately and timely, the requirement of the resistance screen on the sensitivity of the sensor is reduced, and 'stains' generated by external pressure are avoided.
Drawings
FIG. 1: the system comprises a power circuit, a system chip local enlarged image, a clock circuit, a switch circuit, an alarm circuit and a wireless module circuit;
FIG. 2: an A/D conversion circuit;
FIG. 3: a touch interface circuit;
FIG. 4: LED pilot lamp circuit, OLED display circuit, BOOT circuit.
Detailed Description
Embodiment 1:
as shown in fig. 1 to 4: the power supply circuit divides and filters 12V direct current voltage to obtain 5V and 3.3V voltage for the system to use, the wireless module circuit sets the circuit system to enter a configuration mode, an external handwriting pen and a handwriting board are configured, the system enters a receiving mode after the configuration is successful, the clock circuit provides clock signals for the system, the alarm circuit prompts the system to enter a working state, the LED indicating lamp circuit indicating circuit enters the working state, the handwriting pen slides on a touch panel, the A/D conversion circuit converts the handwriting signals into digital signals which can be identified by a system chip, the system amplifies, filters and compares the signals by using an analog/digital conversion principle, the signals are transmitted to the system chip to be processed, the system chip identifies the signals and is connected with an ADS7843 chip by a touch screen interface, the touch screen generates X-axis and Y-axis motion signals, the ADS7843 sampling analog-to-digital converter transmits the signals to the system chip to be processed, the OLED display circuit displays the working state of the system, the system chip and the OLED carry out data interaction through the interface, the single system chip carries out data transmission with the OLED display screen through controlling the six ports, and contents to be displayed can be projected onto the OLED screen. When the handwriting pen moves out of the handwriting board or exceeds the identification area, the alarm circuit gives an alarm prompt.
Embodiment 2:
as shown in fig. 1 to 4: the power supply circuit divides and filters 12V direct current voltage to obtain 5V and 3.3V voltage for a system to use, the wireless module circuit sets the circuit system to enter a configuration mode, an external handwriting pen and a handwriting board are configured, the system enters a receiving mode after the configuration is successful, the BOOT circuit configuration system enters a BOOT starting mode, the system debugging is carried out under the mode, the clock circuit provides clock signals for the system, the alarm circuit prompts the system to enter a working state, the LED indicating lamp circuit indicating circuit enters the working state, the handwriting pen slides on a touch panel, the A/D conversion circuit converts the handwriting signals into digital signals which can be identified by a system chip, the system amplifies, filters and compares the voltage signals by utilizing an analog/digital conversion principle, then transmits the signals to the system chip to be processed, the system chip identifies the signals, and is connected with an ADS7843 chip through a touch screen interface, the touch screen generates X-axis and Y-axis motion signals, the ADS7843 sampling analog-to-digital converter transmits the signals to the system chip for processing, the OLED display circuit displays the working state of the system, the system chip and the OLED display screen perform data interaction through the interfaces, the single system chip performs data transmission with the OLED display screen by controlling the six ports, and contents to be displayed can be projected onto the OLED screen. When the handwriting pen moves out of the handwriting board or exceeds the identification area, the alarm circuit gives an alarm prompt.
In order to facilitate an understanding of the invention, the above description is given in more detail in connection with the accompanying drawings and the specific embodiments. The preferred embodiments of the present invention are shown in the drawings, but the present invention may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Claims (6)
1. The utility model provides a handwriting board circuit of accurate demonstration of electronic book, its characterized in that, the system chip adopts STM32F105RB chip, and the circuit divide into power supply circuit, wireless module circuit, clock circuit, alarm circuit, LED pilot lamp circuit, OLED display circuit, BOOT circuit, switch circuit, A/D converting circuit, touch interface circuit, power supply circuit is independent circuit, power supply circuit comprises two three-terminal regulator U7, U8, power supply circuit adopts 12V to obtain 5V and 3.3V power through partial pressure, steady voltage, filtering, wireless module circuit clock circuit, alarm circuit, LED pilot lamp circuit, OLED display circuit, BOOT circuit, switch circuit, A/D converting circuit, touch interface circuit use the system chip to connect as the center divergence.
2. The circuit of claim 1, wherein the wireless module circuit comprises a chip NRF2401, the chip NRF2401 integrates a frequency synthesizer, a power amplifier, a crystal oscillator, a modulator, and other devices, six ports connected to the system chip are provided, pins 5, 6, and 7 of the chip NRF2401 are respectively connected to pins PB8, PB7, and PB6 of the system chip, pins 2, 3, and 4 of the chip NRF2401 are respectively connected to pins PC8, PC9, and PB5 of the system chip, and the chip NRF2401 adjusts the system to enter a standby mode, a transmission mode, and a reception mode.
3. The circuit of claim 2, wherein two pins of a crystal oscillator X1 IN the clock circuit are respectively connected to an OSC _ IN pin and an OSC _ OUT pin of the system chip, the switch circuit is connected to a PC10 pin of the system chip, a diode IN the LED indicator light circuit is connected to a PB15 pin of the system chip, the alarm circuit includes a transistor Q1 and a buzzer B1, a base of the transistor Q1 is connected to a PC6 pin of the system chip, a collector of the transistor Q1 is connected to a +5V voltage, an emitter of the transistor Q1 is connected to the buzzer B1, and pins 1 and 2 and 3 and 4 of a chip Header 3X2 IN the BOOT circuit are respectively connected to pins of a BOOT0 and a BOOT1, 5 and 6 of the system chip and are grounded.
4. The handwriting board circuit for the precise display of the electronic book according to claim 3, wherein the touch interface circuit comprises a chip ADS7843 and a touch screen interface JMPT, the chip ADS7843 has 16, 15, 14, 13, 12 and 11 pins which are connected to the system chips PC1, PC2, PC3, PC4, PC5 and PC6, the 1, 2, 3 and 4 pins of the touch screen interface are respectively connected to the Y-, X-, Y + and X + pins of the chip ADS7843, the touch screen generates X-axis and Y-axis motion signals, and the chip ADS7843 sampling analog-to-digital converter transmits the signals to the system chips for processing.
5. The electronic book accurate display handwriting board circuit according to claim 4, wherein the OLED display circuit comprises a display screen OLED1, the CS pin, RST pin, D/C pin, D0 and D1 pin of the display screen OLED1 are respectively connected with the PA8, PA9, PA10, PB10 and PB11 pins of the system chip, and the system chip can project the content to be displayed on the screen of the OLED display screen by controlling the five ports to perform data transmission with the OLED display screen.
6. The circuit of claim 5, wherein the A/D converter circuit comprises a chip TLC549CD, three identical three-terminal comparators U5, U6, U7, and a five-terminal comparator U3, the stylus pen JP1 transmits the touch signal to an analog/digital conversion module composed of the comparators, the analog/digital conversion principle system is used for amplifying, filtering and comparing the signal, the converted digital signal is input to the 2 pins of the chip TLC549CD, and the 5, 6 and 7 pins of the chip TLC549CD are respectively connected with the PC0, PB1 and PB0 pins of the system chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011409239.6A CN112596430A (en) | 2020-12-03 | 2020-12-03 | Handwriting board circuit for accurate display of electronic book |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011409239.6A CN112596430A (en) | 2020-12-03 | 2020-12-03 | Handwriting board circuit for accurate display of electronic book |
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| Publication Number | Publication Date |
|---|---|
| CN112596430A true CN112596430A (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011409239.6A Pending CN112596430A (en) | 2020-12-03 | 2020-12-03 | Handwriting board circuit for accurate display of electronic book |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201017313Y (en) * | 2006-12-28 | 2008-02-06 | 天津津科电子系统工程有限公司 | Hand-written electric reading device |
| CN101587399A (en) * | 2009-02-09 | 2009-11-25 | 鑫能源科技(深圳)有限公司 | Electronic writing equipment and electronic writing system |
| TW201137850A (en) * | 2010-03-12 | 2011-11-01 | Semiconductor Energy Lab | Display device |
| CN102368189A (en) * | 2011-10-13 | 2012-03-07 | 无锡大麦创意设计有限公司 | Intelligent handwriting pad |
| KR101850075B1 (en) * | 2016-10-31 | 2018-05-31 | 주식회사 그로비스인포텍 | Catalogue ebook and catalogue ebook system |
-
2020
- 2020-12-03 CN CN202011409239.6A patent/CN112596430A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201017313Y (en) * | 2006-12-28 | 2008-02-06 | 天津津科电子系统工程有限公司 | Hand-written electric reading device |
| CN101587399A (en) * | 2009-02-09 | 2009-11-25 | 鑫能源科技(深圳)有限公司 | Electronic writing equipment and electronic writing system |
| TW201137850A (en) * | 2010-03-12 | 2011-11-01 | Semiconductor Energy Lab | Display device |
| CN102368189A (en) * | 2011-10-13 | 2012-03-07 | 无锡大麦创意设计有限公司 | Intelligent handwriting pad |
| KR101850075B1 (en) * | 2016-10-31 | 2018-05-31 | 주식회사 그로비스인포텍 | Catalogue ebook and catalogue ebook system |
Non-Patent Citations (1)
| Title |
|---|
| 赵哲: "ARM9平台基于Qt/Embedded的电子阅读器设计与实现", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
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Application publication date: 20210402 |
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