LCDWIKI ESP32-32E 2.8inch Display module

Tlhahisoleseding ya Sehlahiswa

Litlhaloso:

• Mohlala: E32R28T&E32N28T
• Boholo ba Pontšo: 2.8 inch
• Microcontroller: ESP32-32E
• Moetsi: LCDWIKI
• Websebaka: www.lcdwiki.com

Litaelo tsa Tšebeliso ea Sehlahisoa

Tlhaloso ea Mohloli:

Sehlahisoa se kenyelletsa lisebelisoa tse fapaneng joalo ka sample mananeo, lilaebrari tsa software, schematics ea hardware, le tse ling. Sheba lethathamo la Pack Information Pack bakeng sa lintlha tse qaqileng.

Litaelo tsa Software:

Ho hlahisa software bakeng sa module ea pontšo:

1. Theha tikoloho ea ntlafatso ea software ea ESP32.
2. Kenya lilaebrari tsa software ea batho ba bang ha ho hlokahala.
3. Bula kapa theha projeke ea software bakeng sa ho lokisa liphoso.
4. Matla ho mojule oa ponts'o, bokella, jarolla lenaneo, 'me u hlahlobe phello.
5. Haeba phello e sa lebeletsoe, fetola khoutu 'me u phete mokhoa ona.

Sheba litokomane tse bukeng ea 1-Demo bakeng sa mehato e qaqileng.

Litaelo tsa Hardware:
Litaelo tsa Hardware li fana ka ho fetaview ea lisebelisoa tsa module, litšoantšo tsa schematic, le litemoso tsa tšebeliso. Etsa bonnete ba ho latela litataiso tsena bakeng sa ts'ebetso e nepahetseng ea mojule oa ponts'o.

Lipotso Tse Botsoang Hangata

P: Nka fumana litaelo tsa ho seta tikoloho ea software hokae?
A: Litaelo tsa ho seta li ka fumanoa bukeng ea 1-_Demo hammoho le litokomane tse ling tse amehang.

P: Litekanyo tsa mojule oa ponts'o ke life?
A: Litekanyo tsa sehlahisoa le litšoantšo tsa 3D li ka fumanoa karolong ea 3-_Structure_Diagram ea lisebelisoa tsa sehlahisoa.

Tlhaloso ea Mohloli

Lenane la lisebelisoa le bontšitsoe setšoantšong se latelang:

Directory	Tlhaloso ea Litaba
1-Mohlala	Likarolo tsa sample khoutu ea lenaneo, laebrari ea software ea motho oa boraro eo sample lenaneo le itšetlehile ka, phetolo ea laeborari ea motho oa boraro file, tokomane ea litaelo tsa ho seta tikoloho ea software, le sample tokomane ea litaelo tsa lenaneo.
2 _Tlhaloso	Bontša tlhahiso ea sehlahisoa sa module, tlhahiso ea skrine ea LCD le khoutu ea ho qala ea IC ea mokhanni oa LCD.
3-Sebopeho_Sets'oants'o	Bontša boholo ba sehlahisoa sa module le litšoantšo tsa 3D tsa sehlahisoa
4- Leqephe la lintlha	LCD display driver Ill9341 data book, resistance drive driver XPT2046 data book, ESP32 master data book and hardware design guide document, USB to Serial IC(CH340C) buka ya data, audio ampbuka ea data ea lifier chip FM8002E, buka ea data ea 5V ho isa ho 3.3V le taolo ea tefiso ea betri Chip TP4054 lakane ea data.
5-Leano	Sebopeho sa thepa ea thepa, ESP32-WROOM-32E module 10 tafole ea kabo ea lisebelisoa, sephutheloana sa schematic le PCB component
6-User_Manual	Litokomane tsa basebelisi ba sehlahisoa
7ke-   Tool_software	WIFI le Bluetooth test APP le lisebelisoa tsa ho lokisa liphoso, USB to serial port driver, ESP32 Flash download tool software, software take up software, software take up software, JPG image processing software le serial port debugging tools.
8-Kapele_Qala	Ho hlokahala ho chesa moqomo file, sesebelisoa sa ho jarolla flash le litaelo tsa tšebeliso.

Litaelo tsa Software

Mehato ea nts'etsopele ea software ea ho bonts'a ke e latelang:

• Haha tikoloho ea ntlafatso ea software ea ESP32;
• ha ho hlokahala, tlisa lilaebrari tsa software tsa batho ba boraro e le motheo oa nts'etsopele;
• bula morero oa software hore o tlosoe, o ka boela oa theha morero o mocha oa software;
• matla ho mojule oa ponts'o, bokella le ho jarolla lenaneo la debugging, ebe o sheba ts'ebetso ea software e sebetsang;
• phello ea software ha e fihle ho se lebeletsoeng, tsoela pele ho fetola khoutu ea lenaneo, ebe o bokella le ho jarolla, ho fihlela phello e lekana le e lebelletsoeng;

Bakeng sa lintlha tse mabapi le mehato e fetileng, bona litokomane bukeng ea 1 1-Demo.

Litaelo tsa Hardware

Fetileview ea lisebelisoa tsa hardware ea module e bontšoa
Lisebelisoa tsa li-hardware tsa module li bonts'oa litšoantšong tse peli tse latelang:

Lisebelisoa tsa hardware li hlalosoa ka tsela e latelang:

1. LCD
   Boholo ba ponts'o ea LCD ke lisenthimithara tse 2.8, mokhanni oa IC ke ILI9341, 'me qeto ke 24 0x 32 0. ESP32 e hokahane ho sebelisa sebopeho sa puisano sa 4-wire SPI.
   • Kenyelletso ea molaoli oa ILI9341
     Molaoli oa ILI9341 o tšehetsa qeto e phahameng ea 240*320 le a172800-byte GRAM. E boetse e tšehetsa 8-bit, 9-bit, 16-bit, le 18-bit parallel port libese tsa data. E boetse e ts'ehetsa likou tsa serial tsa terata tse 3 le tse 4 tsa SPI. Kaha taolo e tšoanang e hloka palo e kholo ea likou tsa IO, e tloaelehileng haholo ke taolo ea boema-kepe ba SPI. ILI9341 e boetse e ts'ehetsa 65K, 262K RGB ponts'o ea 'mala,' mala oa ponts'o o ruile haholo, ha o ntse o ts'ehetsa ponts'o e potolohang le ponts'o ea moqolo le papali ea video, e bonts'a ka mekhoa e fapaneng.
     Molaoli oa ILI9341 o sebelisa 16bit (RGB565) ho laola ponts'o ea pixel, kahoo e ka bonts'a mebala ea 65K ka pixel. Boemo ba aterese ea pixel bo etsoa ka tatellano ea mela le likholomo, 'me tsela e ntseng e eketseha le e fokotsehang e khethoa ke mokhoa oa ho hlahloba. Mokhoa oa ho bonts'a ILI9341 o etsoa ka ho beha aterese ebe o beha boleng ba 'mala.
   • Kenyelletso ea protocol ea puisano ea SPI
     Nako ea mokhoa oa ho ngola ea bese ea 4 4-wire SPI e bontšoa setšoantšong se latelang:
     CSX ke khetho ea chip ea makhoba, 'me chip e tla lumelloa feela ha CSX e le maemong a tlase a matla.
     D/CX ke phini ea taolo ea data/taelo ea chip. Ha DCX e ngola litaelo maemong a tlase, data e ngotsoe maemong a phahameng SCL ke oache ea libese ea SPI, e nang le moeli o mong le o mong o ntseng o phahama o fetisang 1 bit ea data;
     SDA ke data e fetisoang ke SPI, e fetisang likotoana tse 8 tsa data hang. Sebopeho sa data se bontšoa setšoantšong se latelang:
     Phahamisa hanyane pele, fetisetsa pele.
     Bakeng sa puisano ea SPI, data e na le nako ea phetisetso, e kopantsoeng le karolo ea oache ea nako ea nnete (CPHA) le polarity ea oache (CPOL):
     Boemo ba CPOL bo lekanya boemo ba boemo bo sa sebetseng ba oache ea serial synchronous, ka CPOL=0, e bonts'ang boemo bo tlase. Protocol ea phetisetso ea lipara tsa CPOL
     Puisano e ne e se na tšusumetso e kaalo;
     Bophahamo ba CPHA bo etsa qeto ea hore na oache ea serial synchronous e bokella data moeling oa pele kapa oa bobeli oa ho tlola,
     Ha CPHL=0, etsa pokello ea lintlha karolong ea pele ea phetoho;
     Motsoako oa mefuta ena e 'meli ea mekhoa e mene ea puisano ea SPI, le SPI0 e sebelisoa hangata Chaena, moo CPHL=0 le CPOL=0
2. Resistive Touch Screen
   Sesepa sa ho ama se hanyetsang se boholo ba lisenthimithara tse 2.8 'me se hokahane le IC ea taolo ea XPT2046 ka lithakhisa tse 'ne: XL, XR, YU, YD.
3. Lethathamo la lintlha tsa ESP32ESP32-WROOMWROOM-32E
   Mojule ona o na le chip ea ESP32-DOWD-V3 e hahelletsoeng kahare, Xtensa dual-core 32-bit LX6 microprocessor, 'me e ts'ehetsa litefiso tsa oache ho fihla ho 240MHz. E na le 448KB ROM, 520KB SRAM, 16KB RTC SRAM, le 4MB QSPI Flash. 2.4GHz WIFI, Bluetooth V4.2 le Bluetooth Low power modules lia tšehetsoa. Li-GPIO tse 26 tsa kantle, karete ea SD ea tšehetso, UART, SPI, SDIO, I2C, LED PWM, motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC, TWAI le lisebelisoa tse ling.
4. Khadi ea MicroSD Slot
   Ho sebelisa mokhoa oa puisano oa SPI le khokahano ea ESP32, tšehetso ea likarete tsa MicroSD tsa bokhoni bo fapaneng.
5. RGB Leseli la mebala e meraro
   Mabone a LED a khubelu, a matala le a maputsoa a ka sebelisoa ho bontša boemo ba ho sebetsa ha lenaneo.
6. Serial Port
   Mojule oa kantle oa serial port o sebelisoa bakeng sa puisano ea serial port.
7. USB ho Serial Port ebe o tobetsa E le 'ngoe Khoasolla Circuit
   Sesebelisoa sa mantlha ke CH340C, pheletso e 'ngoe e hokahane le komporo ea USB, pheletso e' ngoe e hokahane le koung ea serial ea ESP32, e le ho fihlela USB ho TTL serial port.
   Ntle le moo, potoloho e le 'ngoe ea ho jarolla le eona e kentsoe, ke hore, ha o jarolla lenaneo, e ka kenya mokhoa oa ho jarolla ka bo eona, ntle le tlhoko ea ho ama kantle.
8. Sehokelo sa Battery
   TwoTwo-pin interface, e 'ngoe bakeng sa electrode e ntle, e' ngoe bakeng sa electrode e mpe, fihlella phepelo ea matla a betri le ho tjhaja.
9. Ho Chaja Battery le Potoloho ea Tsamaiso ea Ts'ebetso
   Sesebelisoa sa mantlha ke TP4054, potoloho ena e khona ho laola ha betri e tjhaja hajoale, betri e qosoa ka mokhoa o bolokehileng sebakeng sa saturation, empa hape e ka laola ho tsoa ha betri ka mokhoa o sireletsehileng.
10. BOOT Key
    Kamora hore mochini oa ponts'o o buloe, ho tobetsa ho tla theola IO0. Haeba motsotso oo mojule o buloang kapa ESP32 e setiloe bocha, ho theola IO0 ho tla kenya mokhoa oa ho jarolla. Linyeoe tse ling li ka sebelisoa e le likonopo tse tloaelehileng.
11. TypeType-C Interface
    Khokahano ea mantlha ea phepelo ea motlakase le sesebelisoa sa download sa module ea ponts'o. Hokela USB boema-kepeng ba serial le potoloho e le 'ngoe ea ho jarolla, e ka sebelisoa bakeng sa phepelo ea motlakase, khoaso le puisano ea serial.
12.  5V ho isa ho 3.3V Voltage Regulator Circuit
    Sesebelisoa sa mantlha ke molaoli oa ME6217C33M5G LDO. Le voltage regulator potoloho e tšehetsa 2V ~ 6.5V bophara voltage input, 3.3V e tsitsitseng voltage, 'me boholo ba tlhahiso ea hona joale ke 800mA, e ka kopanang ka botlalo le voltage le litlhoko tsa hajoale tsa mojule oa ponts'o.
13. RESETSA Senotlolo
    Kamora hore mojule oa ponts'o o buloe, ho tobetsa ho tla hula pinana ea ho seta ea ESP32 fatše (boemo ba kamehla bo hula), e le ho fihlela ts'ebetso ea ho seta bocha.
14. Resistive Touch Screen Control Circuit
    Sesebelisoa sa mantlha ke XPT2046, se buisanang le ESP32 ka SPI.
    Potoloho ena ke borokho bo pakeng tsa "resissive touch screen" le master ESP32, ea ikarabellang bakeng sa ho fetisetsa lintlha tse skrineng sa ho ama ho mong'a ESP32, e le ho fumana lihokahanyo tsa ntlha ea ho ama.
15. Atolosa Pin
    Kou ea ho kenya IO, GND, le 3.3V pin th at ha li sebelisoe mojuleng oa ESP32 li hlahisoa bakeng sa tšebeliso ea peripheral.
16. Backlight control circuit
    Sesebelisoa sa mantlha ke BSS138 field effect tube. Qetello e 'ngoe ea potoloho ena e hokahane le pini ea taolo ea backlight ho master ea ESP32,' me pheletso e 'ngoe e hokahane le palo e mpe ea leseli la LCD la LED l.amp. Backlight control pin e hula holimo, khanya ea morao, ho seng joalo e tima.
17. Sebuela-hole
    Li-terminals tsa wiring li tlameha ho hokahanngoa ka holimo. E sebelisoa ho fihlella libuela-hōle tsa monokotsoai le libuela-hole.
18. Matla a molumo amp potoloho ea lifier
    Sesebelisoa sa mantlha ke molumo oa FM8002E ampsetsiba sa IC. Qetello e 'ngoe ea potoloho ena e hokahane le pinana ea tlhahiso ea boleng ba ESP32 audio DAC 'me e 'ngoe e hokahane le sebopeho sa lenaka. Mosebetsi oa potoloho ena ke ho khanna matla a manyenyane ho rn kapa sebui ho utloahala. Bakeng sa phepelo ea matla a 5V, matla a phahameng a ho khanna ke 1.5W (moroalo 8 ohms) kapa 2W (mojaro 4 ohms).
19. SPI peripheral interface
    4-terata tshekaletseng segokanyimmediamentsi sa sebolokigolo. Etella pele phini ea khetho ea chip e sa sebelisoeng le phini ea sebopeho sa SPI e sebelisoang ke karete ea MicroSD, e ka sebelisetsoang lisebelisoa tsa kantle tsa SPI kapa likou tse tloaelehileng tsa IO.

Tlhaloso e qaqileng ea setšoantšo sa schematic sa module ea pontšo

1. TypeType-C interface potoloho
   Potolohong ena, D1 ke Schottky diode, e sebelisetsoang ho thibela hona joale ho khutlela morao. D2 ho D4 ke li-diode tsa ts'ireletso ea electrostatic surge ho thibela mojule oa ponts'o hore o senyehe ka lebaka la matla a mangata.tage kapa potoloho e khuts'oane. R1 ke khanyetso ea ho hulela fatše. USB1 ke bese ea Mofuta oa C. Mojule oa ponts'o o hokahana le phepelo ea motlakase ea TypeType-C, mananeo a ho jarolla, le puisano ea serial port ka USB1. Moo +5V le GND e leng positive power voltage le matshwao a fatshe USB_D D- le USB_D+ ke matshwao a fapaneng a USB, a fetisetswang lebopong la USB-to-serial circuit.
2. 5V ho isa ho 3.3V voltage regulator potoloho
   Potolohong ena, C16 ~ C19 ke "bypass filter capacitor", e sebelisetsoang ho boloka botsitso ba matla a ho kenya letsoho.tage le tlhahiso voltage. U1 ke 5V ho 3.3V LDO e nang le nomoro ea mohlala ME6217C33M5G. Hobane boholo ba lipotoloho tse mojuleng oa ponts'o li hloka phepelo ea motlakase ea 3.3V, 'me matla a kenyelletso ea sebopeho sa Mofuta oa C ha e le hantle ke 5V, kahoo vol.tagE regulator phetolo potoloho e r equired.
3. Resistive touch screen control circuit
   Potolohong ena, C25 le C27 ke li-bypass filter capacitor, tse sebelisetsoang ho boloka matla a ho kenya letsoho.tage botsitso. R22 ke lihanyetsi tse hulelang holimo tse sebelisoang ho boloka boemo ba phini bo le holimo. U4 ke XPT2046 control IC, mosebetsi oa IC ena ke ho fumana coordinate vol.tage bohlokoa ba ntlha ea ho ama ea "touch touch screen" ka X+, X X-, Y+, Y Y- pins tse 'nè, ebe ka phetoho ea ADC, boleng ba ADC bo fetisetsoa ho mong'a ESP32. ESP32 master e fetolela boleng ba ADC ho boleng ba khokahano ea pixel ea ponts'o. Pin ea PEN ke pina e sitisang, 'me boemo ba ho kenya bo tlase ha ketsahalo ea ho ama e etsahala.
4. USB ho koung ea serial le potoloho e le 'ngoe ea download e le 'ngoe
   Potolohong ena, U3 ke CH340C USB-to -serial IC, e sa hlokeng oscillator ea kantle ea kristale ho tsamaisa moralo oa potoloho. C6 ke "bypass filter capacitor" e sebelisoang ho boloka matla a ho kenya letsohotage botsitso. Q1 le Q2 ke li-triode tsa mofuta oa NPN, 'me R6 le R7 ke li-resistant tsa hona joale tse fokotsang moeli oa li-triode. Mosebetsi oa potoloho ena ke ho hlokomela USB ho serial port le ts'ebetso e le 'ngoe ea ho jarolla. Letšoao la USB le kenya letsoho le ho tsoa ka UD+ le UD UD- phini, 'me le fetisetsoa ho master ESP32 ka li-pin tsa RXD le TXD ka mor'a ho sokoloha. Molao-motheo oa potoloho ea ho penya ha 'ngoe feela:
   • Lithakhisa tsa RST le DTR tsa CH340C li hlahisa boemo bo phahameng ka ho sa feleng. Ka nako ena, li-triode tsa Q1 le Q2 ha li so bule, 'me lithakhisa tsa IO0 le lithapo tsa reset tsa taolo ea mantlha ea ESP32 li huleloa holimo.
   • Lithapo tsa RST le DTR tsa CH340C tse hlahisang maemo a tlase, ka nako ena, Q1 le Q2 triode li ntse li sa sebetse, 'me lithapo tsa IO0 le li-reset tsa taolo e kholo ea ESP32 li ntse li huleloa ho ea holimo.
   • Pini ea RST ea CH340C e lula e sa fetohe, 'me pinana ea DTR e hlahisa boemo bo phahameng. Ka nako ena, Q1 e ntse e khaotsoe, Q2 e ntse e tsoela pele, pinana ea IO0 ea mong'a ESP32 e ntse e huloa, 'me pinana ea reset e huloa fatše,' me ESP32 e kena sebakeng sa ho tsosolosa.
   • CH340C's RST pin e hlahisa boemo bo phahameng, pini ea DTR e hlahisa boemo bo tlase, ka nako ena Q1 e buletsoe, Q2 e tima, pini ea ho tsosolosa ea ESP32 e ke ke ea phahama hang-hang hobane capacitor e hokahaneng e qosoa, ESP32 e ntse e le teng. boemong ba ho tsosolosa, 'me pin ea IO0 hang-hang e huloa fatše, ka nako ena e tla kenya mokhoa oa ho jarolla.
5. Matla a molumo amppotoloho ea lifier
   Potolohong ena, R23, C7, C8 le C9 li etsa potoloho ea filthara ea RC, 'me R10 le R13 ke li-resistors tse ntlafatsang ts'ebetso. ampmoqhobi. Ha boleng ba ho hanyetsa ba R13 bo sa fetohe, boleng bo fokolang ba ho hanyetsa R10, bo boholoanyane ba molumo oa sebui sa ka ntle. C10 le C11 ke li-input coupling capacitors. R11 ke mohanyetsi oa ho hulela holimo. JP1 ke lenaka / boema-kepe ba sebui. U5 ke matla a molumo oa FM8002E ampsetsiba sa IC. Kamora ho kenngoa ke AUDIO_IN, lets'oao la audio la DAC le ampe netefalitsoeng ke FM8002E fumana tlhahiso ea d ho sebui/sebui ka liphini tsa VO1 le VO2. SHUTDOWN ke phini ea ho nolofalletsa FM8002E. Boemo bo tlase bo lumelletsoe. Ka ho sa feleng, boemo bo phahameng bo nolofalitsoe.
6. ESP32-WROOMWROOM-32E potoloho e ka sehloohong ea taolo
   Potolohong ena, C4 le C5 ke bypass filter capacitor, 'me U2 ke ESP32ESP32-WROOMWROOM-32E modules. Bakeng sa lintlha tse mabapi le potoloho ea kahare ea mojule ona, ka kopo sheba litokomane tsa semmuso.
7. Key reset potoloho
   Potolohong ena, KEY1 ke senotlolo, R4 ke mohanyetsi oa ho hula, 'me C3 ke eona e liehang ho sebetsa. Hlophisa molao-motheo:
   • Kamora ho bulela motlakase, litefiso tsa C3. Ka nako ena, C3 e lekana le potoloho e khuts'oane, phini ea RESET e thehiloe, ESP32 e kena boemong ba ho seta bocha.
   • Ha C3 e lefisoa, C3 e lekana le potoloho e bulehileng, phini ea RESET ea huloa, ho seta bocha ESP32 ho felile, 'me ESP32 e kena boemong bo tloaelehileng ba ho sebetsa.
   • Ha KEY1 e hatelloa, phini ea RESET e thehiloe, ESP32 e kena boemong ba ho tsosolosa, 'me C3 e lokolloa ka KEY1.
   • Ha KEY1 e lokolloa, C3 e tla lefisoa. Ka nako ena, C3 e lekana le potoloho e khuts'oane, phini ea RESET e thehiloe, ESP32 e ntse e le boemong ba RESET. Ka mor'a hore C3 e lefelloe, pinana ea ho tsosolosa e huloa, ESP32 e tsosolosoa 'me e kena boemong bo tloaelehileng ba ho sebetsa.
     Haeba RESET e sa atlehe, boleng ba mamello ea C3 bo ka eketsoa ka nepo ho liehisa pini ea reset ka nako e tlase.
8. Interface circuit ea serial module
   Potolohong ena, P2 ke setulo sa 4P 1.25mm, R29 le R30 ke li-resistors tsa impedance, 'me Q5 ke tube e sebetsang tšimong e laolang matla a ho kenya letsoho a 5V.
   R31 ke sehanyetsi se hulelang fatše. Hokela RXD0 le TXD0 ho li-serial pin, 'me u fe matla ho lithakhisa tse ling tse peli. Boema-kepe bona bo hokahantsoe le boema-kepe bo tšoanang le boema-kepe ba USB-to -serial port module.
9. Ntlafatsa IO le li-circuits tsa peripheral interface
   Potolohong ena, P3 le P4 ke litulo tsa 4P 1.25mm. SPI_CLK, SPI_MISO, SPI_MOSI lithakhisa li arolelanoa le liphini tsa SPI tsa karete ea MicroSD. Lithako tsa SPI_CS, IO35 ha li sebelisoe ke lisebelisoa tse ka holim'a boto, kahoo li tsamaisoa ho hokahanya SPI, hape li ka sebelisoa bakeng sa IO e tloaelehileng. Lintho tseo u lokelang ho li ela hloko:
   • IO35 e ka ba feela pi ns;
10. Tefo ea betri le potoloho ea taolo ea ho tsoa
    Potolohong ena, C20, C21, C22 le C23 ke bypass filter capacitor. U6 ke IC ea taolo ea tefo ea betri ea TP4054. R27 e laola nako ea ho tjhaja betri. JP2 ke setulo sa 2P 1.25mm, se hoketsoeng le beteri. Q3 ke P P-channel FET. R28 ke sehanyetsi sa marang-rang sa Q3 se hulelang fatše. TP4054 e tjhaja betri ka pini ea BAT, e nyane t he R27 khanyetso, e kholoanyane ea ho tjhaja hona joale, boholo ke 500mA. Q3 le R28 hammoho li theha potoloho ea betri, ha ho se na motlakase ka sebopeho sa Mofuta oa C, + 5V vol.tage ke 0, ebe heke ea Q3 e huleloa ho ea boemong bo tlaase, drainage le mohloli li ntse li le teng, 'me betri e fana ka matla ho module eohle ea pontšo. Ha e tsamaisoa ka sebopeho sa Mofuta oa C, +5V voltage ke 5V, ebe heke ea Q3 e phahame ka 5V, drainage le mohloli li khaotsoe, 'me phepelo ea betri y e sitisoa.
11. 18P LCD panel wire welding interface
    Potolohong ena, C24 ke "bypass filter capacitor", 'me QD1 ke 48P 0.8mmpitch liquid crystal screen welding interface. QD1 e na le pini ea lets'oao la resis tance touch screen, LCD screen voltage pin, phini ea puisano ea SPI, phini ea taolo le phini ea potoloho ea backlight. ESP32 e sebelisa lithakhisa tsena ho laola LCD le sekirini sa ho ama.
12. Khoasolla potoloho ea senotlolo
    Potolohong ena, KEY2 ke senotlolo 'me R5 ke mohanyetsi oa ho hula. IO0 e phahame ka mokhoa o ikhethileng 'me e tlase ha KEY2 e hatelloa. Tobetsa o hatelle KEY2, bulela kapa seta bocha, 'me ESP32 e tla kenya mokhoa oa ho jarolla. Maemong a mang, KEY2 e ka sebelisoa e le senotlolo se tloaelehileng.
13. Potoloho ea matla a betri
    Potolohong ena, R2 le R3 ke karolo e itseng ea voltage resistors, le C1 le C2 ke bypass filter capacitor. Matla a betri voltagKenyelletso ea lets'oao la e BAT + e feta ka har'a mohanyetsi oa karohano. BAT_ADC ke moqolotagE boleng lintlheng tse peli tsa R3, e fetisetsoang ho master ESP32 ka pini ea ho kenya, ebe e fetoloa ke ADC hore qetellong e fumane matla a betri.tage bohlokoa. Molumotage divider e sebelisoa hobane ESP32 ADC e fetolela boholo ba 3.3V, athe betri saturation vol.tage ke 4.2V, e tsoileng tseleng. Moqtage atisang ka 2 ke matla a sebele a betritage.
14. LCD backlight control circuit
    Potolohong ena, R24 ke khanyetso ea debugging mme e bolokiloe ka nakoana. Q4 ke N N-channel field effect tube, R25 ke Q4 grid pull-down resistor, 'me R26 ke sehanyetsi sa morao-rao sa morao-rao. Lebone la LCD le khanyang la LED lamp e boemong bo tšoanang, palo e ntle e hokahane le 3.3V, 'me palo e mpe e hokahane le drain ea Q4. Ha phini ea taolo LCD_BL e hlahisa molumo o phahamengtage, drain le palo ea mohloli oa Q4 li buletsoe. Ka nako ena, palo e mpe ea lebone la LCD e thehiloe fatše, 'me leseli le ka morao la LED lamp e buletswe mme e ntsha kganya.
    Ha phini ea taolo LCD_BL e hlahisa molumo o tlasetage, mokelikeli le mohloli oa Q4 li khaotsoe, 'me leseli le ka morao la skrine la LCD le emisitsoe, le lebone le ka morao la LED l.amp ha e butsoe. Ka kamehla, lebone la LCD le tima.
    Ho fokotsa khanyetso ea R26 ho ka eketsa khanya e phahameng ea lebone la morao.
    Ntle le moo, pinana ea LCD_BL e ka kenya lets'oao la PWM ho lokisa LCD backligh backlight.
15. RGB e meraro ea mebala e meraro ea taolo ea khanya ea potoloho
    Potolohong ena, LED2 ke RGB e mebala e meraro ea lamp, le R14~R16 ke l e mebala e meraro e meraroamp mohanyetsi oa hona joale oa moeli. LED2 e na le mabone a LED a khubelu, a botala le a maputsoa, ​​e leng ar e common anode connection, IO16, IO17 le IO22 ke lithapo tse tharo tsa taolo, tse khantšang mabone a LED boemong bo tlaase le ho tima mabone a LED boemong bo phahameng.
16. MicroSD karete slot segokanyimmediamentsi sa sebolokigolo
    Potolohong ena, SD_CARD1 ke sekotjana sa karete ea MicroSD. R17 ho isa ho R21 ke lihanyetsi tse hulelang holimo bakeng sa phini ka 'ngoe. C26 ke "bypass filter capacitor". Potoloho ena ea sehokelo e sebelisa mokhoa oa puisano oa SPI. E ts'ehetsa polokelo ea lebelo le holimo ea likarete tsa MicroSD.
    Hlokomela hore interf ace ena e arolelana bese ea SPI le SPI peripheral interface.

Litlhokomelo bakeng sa tšebeliso ea mojule oa ponts'o

1. Sesebelisoa sa ponts'o se qosoa ka betri, sebui sa kantle se bapala molumo, 'me skrine ea pontšo e boetse e sebetsa, ka nako ena kakaretso ea hona joale e ka feta 500mA. Tabeng ena, o hloka ho ela hloko boholo ba hona joale bo tšehetsoeng ke thapo ea Mofuta oa C le boholo ba hajoale bo tšehetsoeng ke sebopeho sa phepelo ea motlakase ho qoba phepelo e sa lekaneng ea matla.
2. Nakong ea ts'ebeliso, u se ke oa ama molumo oa LDOtage regulato r le taolo ea tefiso ea betri IC ka matsoho a hau ho qoba ho chesoa ke mocheso o phahameng.
3. Ha o hokela boema-kepe ba IO, ela hloko tšebeliso ea IO ho qoba ho hokela hampe mme tlhaloso ea khoutu ea lenaneo ha e tsamaellane.
4. Sebelisa sehlahisoa ka mokhoa o sireletsehileng le ka mabaka a utloahalang.

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Litokomane / Lisebelisoa

LCDWIKI ESP32-32E 2.8inch Display module [pdf] Bukana ea Mosebelisi ESP32-32E 2.8inch Display Module, ESP32-32E, 2.8inch Display Module, Display Module, Mojule

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