LCD wiki E32R28T 2.8inch ESP32-32E Display Module

Sehlahisoa sena ke 2.8-inch ESP32-32E E32R28T&E32N28T module ea ponts'o e nang le lisebelisoa tse fapaneng tsa lisebelisoa le lisebelisoa tsa software bakeng sa nts'etsopele.

Litaelo tsa Tšebeliso ea Sehlahisoa

Lethathamo la lisebelisoa le kenyelletsa sample mananeo, lilaebrari tsa software, litlhaloso tsa sehlahisoa, litšoantšo tsa sebopeho, databases, schematics, libuka tsa basebelisi, le software ea lisebelisoa.
Karolo ena e fana ka tlhalosoview ea lisebelisoa tsa hardware tse fumanehang mojuleng.

E hlalosa ka botlalo sets'oants'o sa moralo oa mojule oa ponts'o.
E fana ka litemoso tse lokelang ho nkuoa ha u ntse u sebelisa module ea ponts'o.

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 thuto ea lenaneo tokomane.
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 ILI9341 data book, resistance 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, 5V ho isa ho 3.3V le taolo ea tjhaja ya betri Chip TP4054 data sheet.
5-Leano	Sekema sa thepa ea thepa, ESP32-WROOM-32E mojule oa IO tafole ea kabo ea lisebelisoa, schematic, le sephutheloana sa karolo ea PCB.
6-User_Manual	Litokomane tsa basebelisi ba sehlahisoa
7-Tool_software	WIFI le Bluetooth test APP le lisebelisoa tsa ho lokisa liphoso, USB to serial port driver, ESP32 Flash download tool software, software ea ho nka litlhaku, software ea ho nka litšoantšo, software ea JPG image processing. le lisebelisoa tsa serial port debugging.
8-Kapele_Qala	Ho hlokahala ho chesa moqomo file, khantša sesebelisoa sa ho jarolla, 'me u sebelise litaelo.

Litaelo tsa Software

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

A. Haha tikoloho ea ntlafatso ea software ea ESP32.

B. Haeba ho hlokahala, tlisa lilaebrari tsa software tsa mokha oa boraro e le motheo oa nts'etsopele;
C. Bula projeke ea software hore e tlosoe, kapa u ka theha projeke e ncha ea software.

D. matla ho mojule oa ponts'o, bokella le ho jarolla lenaneo la debugging, ebe u sheba ts'ebetso ea software e sebetsang.
E. 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 fihla ho se lebeletsoeng.
Bakeng sa lintlha tse mabapi le mehato e fetileng, bona litokomane bukeng ea 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:

LCD

Boholo ba pontšo 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.
A. Selelekela ho molaoli oa ILI9341 Molaoli oa ILI9341 o tšehetsa qeto e phahameng ea 240 * 320 le GRAM ea 172800-byte. 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 ts'oanang e hloka palo e kholo ea likou tsa I / O, 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 pontšo ea moqolo le ho bapala video, le ho 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.
B. Kenyelletso ea protocol ea puisano ea SPI

Nako ea ho ngola ea bese ea SPI ea terata e 4 e bonts'oa 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 holimo

SCL ke oache ea libese ea SPI, e nang le moeli o mong le o mong o ntseng o phahama o fetisang data e le 'ngoe.
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

ESP32 WROOM 32E M odule

Mojule ona o na le chip ea ESP32-DOWD-V3 e hahelletsoeng ka hare, Xtensa dual-core 32-bit LX6 microprocessor, 'me e tšehetsa litekanyetso 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.

Khadi ea MicroSD Slot

Ho sebelisa mokhoa oa puisano oa SPI le khokahano ea ESP32, tšehetso ea likarete tsa MicroSD tsa bokhoni bo fapaneng.

RGB Three mmala Leseli

Mabone a LED a khubelu, a matala le a maputsoa a ka sebelisoa ho bontša boemo ba ho sebetsa ha lenaneo.

Serial Port

Mojule oa kantle oa serial port o sebelisoa bakeng sa puisano ea serial port.

USB ho Serial Port ebe o tobetsa ha 'ngoe Download 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.
Ho phaella moo, potoloho e le 'ngoe ea ho kopitsa e boetse e khomaretsoe, kahoo, ha u khoasolla lenaneo, e ka kenya mokhoa oa ho jarolla ka bo eona, ntle le tlhokahalo ea ho ama ka ntle.

Sehokelo sa Battery

Khokahano ea li-pin tse peli, e 'ngoe bakeng sa eleketrode e ntle, e' ngoe bakeng sa eleketrode e mpe, ho fihlella phepelo ea matla a betri le ho tjhaja.

Potoloho ea Taolo ea Battery le Taolo ea ho Hlakola

Sesebelisoa sa mantlha ke TP4054, potoloho ena e ka laola ho tjhaja ha betri hajoale, betri e qosoa ka mokhoa o sireletsehileng ho boemo ba saturation, empa hape e ka laola ka mokhoa o sireletsehileng ho tsoa ha betri.

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.

Mofuta oa C-C

Khokahano e kholo ea phepelo ea matla le segokanyimmediamentsi sa ho jarolla lenaneo la mojule oa 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.

5V ho isa ho 3.3V Voltage Regulator Circuit

Sesebelisoa sa mantlha ke molaoli oa ME6217C33M5G LDO.

Voltagpotoloho ea e regulator e tšehetsa 2A V ~ 6.5V bophara ba 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.

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.

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.

Atolosa Pin

Ho kenngoa ha IO port, GND, le 3.3V pin tse sa sebelisoeng mojuleng oa ESP32 li hlahisoa bakeng sa tšebeliso ea peripheral.

Backlight control circuit

Sesebelisoa sa mantlha ke tube ea BSS138 e sebetsang tšimong.
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.

Sebuela-hole

Li-terminals tsa wiring li tlameha ho hokahanngoa ka holimo. E sebelisoa ho fihlella libuela-hōle tsa monokotsoai le libuela-hole.

Matla a molumo amppotoloho 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 lenaka le lenyenyane la matla 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).

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 sebelisoang bakeng sa lisebelisoa tsa kantle tsa SPI kapa likou tse tloaelehileng tsa IO.

Tlhaloso e qaqileng ea setšoantšo sa schematic sa module ea pontšo

Mofuta oa 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 hula fatše. USB1 ke bese ea Mofuta oa C. Mojule oa ponts'o o hokahana le phepelo ea motlakase ea Mofuta oa C, mananeo a khoasolla, 'me o hokahana ka USB 1. Moo +5V le GND e leng positive vol.tage le matshwao a fatshe USB_D le USB_D+ ke matshwao a fapaneng a USB, a fetisetswang ho USB_D ho serial circuit.

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 tsa mojule oa ponts'o li hloka phepelo ea motlakase ea 3.3V, 'me matla a kenyelletso ea mofuta oa Cinterface ha e le hantle ke 5V, kahoo vol.tagE regulator e fetola potoloho ea hlokahala.

Resistive touch screen control circuit

Potolohong ena, C25 le C27 ke li-bypass filter capacitors, tse sebelisetsoang ho boloka matla a ho kenya letsoho.tage botsitso. R22 ke sehanyetsi sa ho hula se sebelisetsoang 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 -, Y+, le Y lipini 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.

USB ho serial port le ho tobetsa ha 'ngoe ho jarolla potoloho

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-resistance tsa hona joale tse fokotsang moeli oa li-triode. Mosebetsi oa potoloho ena ke ho elelloa ho USB-to-serial port le ho tobetsa ts'ebetso ea ho jarolla. Letšoao la USB le kenya letsoho le ho tsoa ka UD+ le UD, 'me le fetisetsoa ho mong'a ESP32 ka li-pin tsa RXD le TXD ka mor'a ho sokoloha. Molao-motheo oa potoloho ea ho penya ha 'ngoe:

A. 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 bone, 'me lithakhisa tsa IO0 le lithapo tsa reset tsa taolo e kholo ea ESP32 li huleloa holimo.
B. 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.
C. 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 sebetsa, pinana ea IO0 ea mong'a ESP32 e ntse e huloa, pinana ea reset e huloa fatše, 'me ESP32 e kena sebakeng sa ho tsosolosa.

D. 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.

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 bahanyetsi ba fetolang phaello ea ts'ebetso. ampmoqhobi. Ha boleng ba ho hanyetsa ba R13 bo sa fetohe, boleng bo fokolang ba ho hanyetsa ba R10, bo boholo ba molumo oa sebui sa ka ntle. C10 le C11 ke li-input coupling capacitors. R11 ke sehanyetsi sa ho hula. 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 hlahiswa ke phaello le tlhahiso ya FM8002E ho sebui/sebui ka diphini 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.

ESP32 WROOM 32E potoloho e kholo ea taolo

Potolohong ena, C4 le C5 ke bypass filter capacitor, 'me U2 ke ESP32 WROOM 32E modules. Bakeng sa lintlha tse mabapi le potoloho ea kahare ea mojule ona, ka kopo sheba litokomane tsa semmuso.

Key reset potoloho

Potolohong ena, KEY1 ke senotlolo, R4 ke mohanyetsi oa ho hula, 'me C3 ke capacitor ea ho lieha. Hlophisa molao-motheo:

A. Kamora ho bulela, litefiso tsa C3. Ka nako ena, C3 e lekana le potoloho e khutšoanyane, pinana ea RESET e thehiloe, 'me ESP32 e kena boemong ba ho tsosolosa.
B. Ha C3 e lefisoa, C3 e lekana le potoloho e bulehileng, phini ea RESET e huloa, ho tsosolosa ESP32 ho felile, 'me ESP32 e kena boemong bo tloaelehileng ba ho sebetsa.

C. Ha KEY1 e hatelloa, phini ea RESET e thehiloe, ESP32 e kena boemong ba ho tsosolosa, 'me C3 e lokolloa ka KEY1.
D. 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.

Potoloho ea li-interface tsa module ea serial

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 ntho e thibelang ho hula 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.

EX pand IO le li-circuits tsa peripheral interface

Potolohong ena, P3 le P4 ke litulo tsa 4P 1.25mm. SPI_CLK, SPI_MISO, le liphini tsa SPI_MOSI li arolelanoa le liphini tsa SPI tsa karete ea MicroSD. Lithako tsa SPI_CS, IO35 ha li sebelisoe ke lisebelisoa tsa boto, kahoo li tsamaisoa ho hokahanya SPI, hape li ka sebelisoa bakeng sa IO e tloaelehileng. Lintho tseo u lokelang ho li ela hloko:

A. IO35 e ka ba li-input pins feela.

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-channel FET. R28 ke sehanyetsi sa ho theola marang-rang sa Q3. TP4054 e tjhaja betri ka phini ea BAT; e nyane ea ho hanyetsa R27, e kholoanyane ea ho tjhaja hona joale, ka boholo ke 500mA. Q3 le R28 hammoho li theha potoloho ea betri, Ha ho se na phepelo ea motlakase ka sebopeho sa mofuta oa C, +5V vol.tage ke 0, ebe heke ea Q3 e huleloa ho ea boemong bo tlaase, draina 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 e sitisoa.

1 8P LCD phanele ea terata segokanyimmediamentsi sa sebolokigolo

Potolohong ena, C24 ke "bypass filter capacitor", 'me QD1 ke 48P 0.8mm pitch liquid crystal screen welding interface. QD1 e na le pini ea lets'oao la "touch 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.

Khoasolla potoloho ea senotlolo

Potolohong ena, KEY2 ke senotlolo 'me R5 ke mohanyetsi oa ho hula. IO0 e phahame ka ho sa feleng ebile e tlase ha KEY2 e tobetsoa. 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.

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.

LCD backlight control circuit

Potolohong ena, R24 ke khanyetso ea debugging mme e bolokiloe ka nakoana. Q4 ke N-channel field effect tube, R25 ke Q4 grid drop-down resistor, 'me R26 ke sehanyetsi sa morao-rao se thibelang khanya. Lebone la LCD le khanyang la LED lamp e boemong bo ts'oanang, palo e ntle e kopantsoe le 3.3V, 'me palo e mpe e hokahane le drain ea Q4. Ha phini ea taolo LCD_BL e hlahisa molumo o phahamengtage, metsi le lipalo tsa 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, phini ea LCD_BL e ka kenya lets'oao la PWM ho lokisa leseli la LCD.

RGB ea mebala e meraro ea ho laola leseli

Potolohong ena, LED2 ke RGB e mebala e meraro lamp, le R14~R16 ke l e mebala e meraroamp mohanyetsi oa hona joale oa moeli.
LED2 e na le mabone a LED a khubelu, a matala le a maputsoa, e leng likhokahano tse tloaelehileng tsa anode.

IO16, IO17 le IO22 ke lithakhisa tse tharo tsa taolo, tse khantšang mabone a LED boemong bo tlaase le ho tima mabone a LED boemong bo phahameng.

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 e potlakileng ea likarete tsa MicroSD.
Hlokomela hore sebopeho sena se arolelana bese ea SPI le SPI peripheral interface.

Litlhokomelo bakeng sa tšebeliso ea mojule oa ponts'o

Mojule oa ponts'o o 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 hona joale bo tšehetsoeng ke sebopeho sa phepelo ea matla ho qoba phepelo e sa lekaneng ea matla.

Nakong ea ts'ebeliso, u se ke oa ama molumo oa LDOtage regulator le taolo ea tefiso ea betri IC ka matsoho a hau ho qoba ho chesoa ke mocheso o phahameng.
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.
Sebelisa sehlahisoa ka mokhoa o sireletsehileng le ka mokhoa o utloahalang.

LBH

P: Ke fumana sampmananeo le lilaebrari tsa software?
- A: Likarolo tsa sampmananeo le lilaeborari li ka fumanoa bukeng ea 1-_Demo ea tlhaloso ea lisebelisoa.
P: Ke lisebelisoa life tse kenyellelitsoeng ho software ea sesebelisoa?
- A: Sesebelisoa sa sesebelisoa se kenyelletsa WIFI le Bluetooth test APP, lisebelisoa tsa ho lokisa liphoso, USB to serial port driver, ESP32 Flash download tool software, software ea ho nka litlhaku, software ea ho nka litšoantšo, software ea ho lokisa litšoantšo tsa JPG, le lisebelisoa tsa serial port debugging.

Litokomane / Lisebelisoa

Tlhaloso: LCD wiki E32R28T 2.8inch ESP32-32E Tlhaloso: [pdf] Bukana ea Mosebelisi
E32R28T, E32N28T, E32R28T 2.8inch ESP32-32E Display Module, E32R28T, 2.8inch ESP32-32E Display Module, ESP32-32E Pontšo ea Mojule, Mojule oa Pontšo, Mojule

Litšupiso

Bukana ea Mosebelisi

Tlhaloso: LCD wiki E32R28T 2.8inch ESP32-32E Tlhaloso:

Litlhaloso

Tlhahisoleseding ya Sehlahiswa