I-LCD wiki E32R28T 2.8inch ESP32-32E Bonisa Imojuli Manual yomsebenzisi

Lo mkhiqizo uyimojuli yokubonisa engu-2.8-intshi ESP32-32E E32R28T&E32N28T enezingxenyekazi zekhompuyutha ezihlukahlukene nezinsiza zesofthiwe zokuthuthukiswa.

Imiyalo yokusetshenziswa komkhiqizo

Uhlu lwemibhalo lwensiza lubandakanya u-sample izinhlelo, imitapo yolwazi yesofthiwe, ukucaciswa komkhiqizo, imidwebo yesakhiwo, imininingwane yedatha, izinhlelo zokusebenza, imanyuwali yomsebenzisi, nesofthiwe yamathuluzi.
Lesi sigaba sinikeza i-overview wezinsiza zehadiwe ezitholakala kumojula.

Ichaza umdwebo wohlelo lwemojuli yesibonisi ngokuningiliziwe.
Inikeza izinyathelo zokuphepha okufanele zithathwe ngenkathi usebenzisa imojula yokubonisa.

Incazelo Yensiza

Uhlu lwezinsiza luboniswa esithombeni esilandelayo:

Uhla lwemibhalo	Incazelo Yokuqukethwe
1-Idemo	I-sample ikhodi yohlelo, umtapo wolwazi wesofthiwe yenkampani yangaphandle i-sampUhlelo lwe-le luncike, ukushintshwa komtapo wolwazi wesofthiwe yenkampani yangaphandle file, idokhumenti yemiyalo yokusetha indawo yokuthuthukiswa kwesofthiwe, kanye ne-sampleziyalezo zohlelo idokhumenti.
2-Ukucaciswa	Ukucaciswa komkhiqizo wemojula, ukucaciswa kwesikrini se-LCD kanye nekhodi yokuqalisa ye-IC yomshayeli wokubonisa i-LCD.
3-Isakhiwo_Umdwebo	Bonisa ubukhulu bomkhiqizo wemojula kanye nemidwebo ye-3D yomkhiqizo
4-Ishidi le-data	Incwadi yedatha yomshayeli obonisa i-LCD ILI9341, incwadi yedatha yomshayeli wesikrini esithintwayo XPT2046, ibhuku ledatha eliyinhloko le-ESP32 kanye nedokhumenti yokuqondisa komklamo wezingxenyekazi zekhompyutha, ibhuku ledatha le-USB kuya ku-Serial IC(CH340C), okulalelwayo ampIncwadi yedatha ye-lifier chip FM8002E, i-5V ukuya ku-3.3V ibhuku ledatha yesilawuli kanye nokuphathwa kokushajwa kwebhethri ishidi ledatha le-Chip TP4054.
5-Okuhlelekile	I-schematic hardware schematic, ESP32-WROOM-32E module IO ithebula lokwabiwa kwensiza, i-schematic, kanye nephakheji yengxenye ye-PCB
6-Imaniwali yosebenzisayo	Amadokhumenti omsebenzisi womkhiqizo
7-Isofthiwe_yethuluzi	I-WIFI ne-Bluetooth yokuhlola i-APP namathuluzi okulungisa iphutha, i-USB kuya kumshayeli wembobo ye-serial, isofthiwe yethuluzi lokulanda i-Flash ESP32, isofthiwe yokuthatha izinhlamvu, isofthiwe yokuthatha izithombe, isofthiwe ye-JPG yokucubungula izithombe kanye namathuluzi e-serial debugging port.
8-Quick_Qala	Udinga ukushisa umgqomo file, khanyisa ithuluzi lokulanda, bese usebenzisa imiyalelo.

Imiyalo Yesoftware

Izinyathelo zokuthuthukisa isoftware yemojuli zimi kanje:

A. Yakha indawo yokuthuthukisa isofthiwe yesikhulumi se-ESP32.

B. Uma kunesidingo, ngenisa imitapo yolwazi yesofthiwe yomuntu wesithathu njengesisekelo sokuthuthukiswa;
C. Vula iphrojekthi yesofthiwe ukuze isuswe iphutha, noma ungaphinda udale iphrojekthi yesofthiwe entsha.

D. amandla kumojula yesibonisi, hlanganisa futhi ulande uhlelo lokususa iphutha, bese uhlola umphumela wokusebenza kwesoftware.
E. Umphumela wesofthiwe awufinyeleli kokulindelwe, qhubeka ulungisa ikhodi yohlelo, bese uhlanganisa futhi ulande, kuze kube umphumela ufinyelela kulokho okulindelekile.
Ukuze uthole imininingwane mayelana nezinyathelo ezandulele, bheka imibhalo kuhla lwemibhalo Yedemo engu-1.

Hardware Imiyalelo

Kuphelileview yezinsiza zehadiwe yemojuli iyaboniswa

Izinsiza ze-Hardware zemojuli ziboniswa emibalweni emibili elandelayo:

Izinsiza zehardware zichazwa kanje:

I-LCD

Usayizi wokuboniswa kwe-LCD ungamayintshi angu-2.8, umshayeli we-IC ngu-ILI9341, futhi ukulungiswa kungu-24 0x 32 0. I-ESP32 ixhunywe kusetshenziswa isixhumi esibonakalayo sokuxhumana se-SPI enezintambo ezingu-4.
A. Isethulo sesilawuli se-ILI9341 Isilawuli se-ILI9341 sisekela ukulungiswa okuphezulu okungu-240*320 kanye ne-172800-byte GRAM. Iphinde isekele i-8-bit, 9-bit, 16-bit, kanye ne-18-bit yamabhasi edatha embobo ahambisanayo. Futhi isekela izimbobo ze-serial ze-SPI ezinezintambo ezi-3 nezingu-4. Njengoba ukulawula okuhambisanayo kudinga inombolo enkulu yezimbobo ze-I/O, evame kakhulu ukulawulwa kwembobo ye-SPI. I-ILI9341 iphinde isekele i-65K, i-262K RGB ukubonisa umbala, umbala wokubonisa ucebile kakhulu, kuyilapho usekela isibonisi esijikelezayo nokuboniswa kokuskrola nokudlalwa kwevidiyo, nokuboniswa ngezindlela ezihlukahlukene.

Isilawuli se-ILI9341 sisebenzisa i-16bit (RGB565) ukulawula isibonisi sephikseli, ukuze sikwazi ukubonisa imibala efika ku-65K ngephikseli ngayinye. Ukulungiselelwa kwekheli lephikseli kwenziwa ngokulandelana kwemigqa namakholomu, futhi indlela ekhuphukayo neyancipha inqunywa imodi yokuskena. Indlela yokubonisa ye-ILI9341 yenziwa ngokusetha ikheli bese usetha inani lombala.
B. Isingeniso sephrothokholi yokuxhumana ye-SPI

Isikhathi semodi yokubhala yebhasi le-SPI enezintambo ezi-4 siboniswa esithombeni esilandelayo:

I-CSX iwukukhetha kwe-chip yesigqila, futhi i-chip izonikwa amandla kuphela uma i-CSX isezingeni eliphansi lamandla.
I-D/CX iyiphinikhodi yokulawula idatha/yomyalo ye-chip. Uma i-DCX ibhala imiyalo emazingeni aphansi, idatha ibhalwa emazingeni aphezulu

I-SCL iwashi lebhasi le-SPI, unqenqema ngalunye olukhuphukayo luthumela ibhithi elilodwa ledatha.
I-SDA idatha edluliswa yi-SPI, edlulisa amabhithi edatha angu-8 ngesikhathi esisodwa. Ifomethi yedatha iboniswa emfanekisweni olandelayo:

Phakamisa kancane kuqala, dlulisela kuqala.
Ngokuxhumana kwe-SPI, idatha inesikhathi sokudlulisa, nenhlanganisela yesigaba sewashi lesikhathi sangempela (CPHA) kanye ne-polarity yewashi (CPOL):
Izinga le-CPOL linquma izinga lokungenzi lutho lewashi le-serial synchronous, ne-CPOL=0, ekhombisa ileveli ephansi. I-CPOL pair transmission protocol
Ingxoxo ayizange ibe nethonya elikhulu.
Ubude be-CPHA bunquma ukuthi ingabe iwashi le-serial synchronous liqoqa idatha onqenqemeni lokugxuma lwewashi lokuqala noma lesibili,
Uma CPHL=0, yenza ukuqoqwa kwedatha onqenqemeni lwenguquko yokuqala;
Inhlanganisela yalezi zindlela ezimbili zokuxhumana ze-SPI, kanye ne-SPI0 isetshenziswa kakhulu e-China, lapho i-CPHL=0 kanye ne-CPOL=0

ESP32 WROOM 32E M module

Le mojula ine-chip ye-ESP32-DOWD-V3 eyakhelwe ngaphakathi, i-Xtensa dual-core 32-bit LX6 microprocessor, futhi isekela amazinga wewashi afika ku-240MHz. Ine-448KB ROM, 520KB SRAM, 16KB RTC SRAM, kanye ne-4MB QSPI Flash. 2.4GHz WiFi,
I-Bluetooth V4.2 namamojula we-Bluetooth Amandla Aphansi ayasekelwa. Ama-GPIO angama-26 angaphandle, ikhadi le-SD elisekelayo, i-UART, SPI, SDIO, I2C, LED PWM, motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC, TWAI nezinye izinto eziphathelene nomngcele.

I-MicroSD Card Slot

Kusetshenziswa imodi yokuxhumana ye-SPI nokuxhumeka kwe-ESP32, ukusekelwa kwamakhadi e-MicroSD amakhono ahlukahlukene.

I-RGB Three color Light

Amalambu e-LED abomvu, aluhlaza, naluhlaza angasetshenziswa ukukhombisa isimo sokusebenza sohlelo.

Imbobo ye-serial

I-serial port module isetshenziselwa ukuxhumana kwe-serial port.

I-USB ku-serial Port bese uchofoza okukodwa u-Download Circuit

Idivayisi ewumgogodla yi-CH340C, indawo eyodwa ixhunywe ku-USB yekhompyutha, enye ingxenye ixhunywe kumbobo ye-serial ye-ESP32, ukuze kuzuzwe i-USB ku-serial port ye-TTL.
Ngaphezu kwalokho, isekethe yokulanda ngokuchofoza okukodwa nayo inamathiselwe, okungukuthi, lapho ulanda uhlelo, ingangena ngokuzenzakalelayo kwimodi yokulanda, ngaphandle kwesidingo sokuthinta ngaphandle.

Isixhumi esibonakalayo sebhethri

Isixhumi esibonakalayo esinamaphini amabili, eyodwa eye-electrode ephozithivu, enye eye-electrode eyinegethivu, ukuze ufinyelele amandla ebhethri nokushaja.

Ukushajwa Kwebhethri Nomjikelezo Wokulawula Ukukhipha

Idivayisi eyinhloko yi-TP4054, le sekhethi ingakwazi ukulawula ukushaja kwebhethri yamanje, ibhethri ishajwe ngokuphephile esimweni sokugcwala, kodwa futhi ingalawula ngokuphepha ukuphuma kwebhethri.

I-BOOT Key

Ngemuva kokuthi imojuli yokubonisa ivuliwe, ukucindezela kuzokwehlisa i-IO0. Uma isikhashana imojuli ivuliwe noma i-ESP32 isethwe kabusha, ukwehlisa i-IO0 kuzofaka imodi yokulanda. Ezinye izimo zingasetshenziswa njengezinkinobho ezijwayelekile.

I-Type-C Interface

Isixhumi esibonakalayo esiyinhloko sokuphakelwa kwamandla kanye nesixhumi esibonakalayo sokulanda uhlelo semojula yokubonisa. Xhuma i-USB embotsheni ye-serial kanye nesekethe yokukhipha ngokuchofoza kanye, ingasetshenziselwa ukunikezwa kwamandla, ukulanda kanye nokuxhumana kwe-serial.

5V kuya ku-3.3V Voltage Circuit Regulator

Idivayisi eyinhloko isilawuli se-ME6217C33M5G LDO.

IVoltagIsifunda somlawuli sisekela i-2A V~6.5V ububanzitage input, 3.3V voltage okukhiphayo, futhi okukhiphayo okuphezulu kwamanje ngu-800mA, okungahlangabezana ngokugcwele nevolumutage kanye nezidingo zamanje zemojula yokubonisa.

SETHA KABUSHA Ukhiye

Ngemva kokuthi imojula yesibonisi ivuliwe, ukucindezela kuzodonsela phansi iphinikhodi yokusetha kabusha ye-ESP32 (isimo esizenzakalelayo sidonsela phezulu), ukuze kuzuzwe umsebenzi wokusetha kabusha.

Umjikelezo Wokulawula Isikrini Sokuthinta

Idivayisi ewumgogodla yi-XPT2046, exhumana ne-ESP32 nge-SPI.
Lo mjikelezo uyibhuloho eliphakathi kwesikrini esithintwayo esiphikisayo kanye ne-ESP32 master, enesibopho sokudlulisa idatha esesikrinini sokuthinta ku-ESP32 master, ukuze kutholwe izixhumanisi zendawo yokuthinta.

Nweba Iphinikhodi

Imbobo ye-IO yokufaka, i-GND, nephinikhodi engu-3.3V engasetshenziswa kumojula ye-ESP32 ikhishwa ukuze isetshenziswe i-peripheral.

I-backlight control circuit

Idivayisi ewumgogodla iyishubhu ye-BSS138 yomphumela wenkundla.
Ingxenye eyodwa yalesi sekethi ixhunywe kwiphinikhodi yokulawula ukukhanya kwangemuva ku-ESP32 master, kanti enye ixhunywe esigxotsheni esinegethivu sesikrini se-LCD se-backlight LED l.amp.
Iphinikhodi yokulawula ukukhanya kwangemuva idonsela phezulu, ukukhanya emuva, uma kungenjalo kucishiwe.

Isixhumi esibonakalayo sesipikha

Amatheminali ezintambo kufanele axhumeke mpo. Isetshenziselwa ukufinyelela izipikha ze-mono nezipikha.

Amandla omsindo ampi-lifier circuit

Idivayisi eyinhloko umsindo we-FM8002E ampi-lifier IC.
Ingxenye eyodwa yale sekhethi ixhunywe kuphini lokuphuma inani le-ESP32 audio DAC kanti enye ixhunywe kusixhumi esibonakalayo sophondo.
Umsebenzi walesi sekethi ukushayela uphondo lwamandla amancane noma isipika ukuze sizwakale. Ngokunikezwa kwamandla we-5V, amandla okushayela aphezulu ngu-1.5W (umthwalo ongu-8 ohms) noma u-2W (umthwalo ongu-4 ohms).

I-SPI peripheral interface

I-interface evundlile yezintambo ezi-4. Hola iphinikhodi yokukhetha engasetshenziswanga kanye nephinikhodi ye-SPI esetshenziswa ikhadi le-MicroSD, engasetshenziselwa amadivaysi e-SPI angaphandle noma amachweba ajwayelekile e-IO.

Incazelo enemininingwane yomdwebo wohlelo lwemojuli yokubonisa

Isekethe yesixhumi esibonakalayo sohlobo C

Kulo mjikelezo, i-D1 iyi-diode ye-Schottky, esetshenziselwa ukuvimbela yamanje ukuthi ingahlehli. I-D2 kuya ku-D4 ama-diode okuvikela ukukhuphuka kwe-electrostatic ukuvimbela imojula yokubonisa ukuthi yonakaliswe ngenxa yevolthi eyeqile.tage noma isifunda esifushane. U-R1 ukumelana nokudonsela phansi. I-USB1 iyibhasi yohlobo C. Imojula yokubonisa ixhumeka ekunikezeni amandla oHlobo C, izinhlelo zokulanda, futhi ixhumana nge-USB 1. Lapho i-+5V ne-GND kukhona ivolthi yamandla ephozithivutagI-e namasiginali aphansi i-USB_D ne-USB_D+ amasiginali e-USB ahlukile, adluliselwa ku-USB esembhobho kuya kusekethe ye-serial.

5V kuya ku-3.3V ivolumutagi-regulator circuit

Kulo mjikelezo, i-C16~C19 iyi-bypass filter capacitor, esetshenziselwa ukugcina ukuzinza kwevolthi yokufaka.tage kanye nevolumu yokuphumayotage. I-U1 iyi-5V kuya ku-3.3V LDO enenombolo yemodeli i-ME6217C33M5G. Ngoba amasekhethi amaningi kumojula yokubonisa adinga ugesi ongu-3.3V, futhi okokufaka kwamandla ohlobo lwe-Cinterface ngokuyisisekelo kungu-5V, ngakho-ke ivolthitagIsifunda sokuguqulwa kwesilawuli siyadingeka.

Umjikelezo wokulawula isikrini sokuthinta

Kulo mjikelezo, i-C25 ne-C27 ama-bypass filter capacitor, asetshenziselwa ukugcina ivolumu yokufaka.tage ukuzinza. I-R22 iyisivikeli sokudonsa esisetshenziselwa ukugcina isimo sephinikhodi esimisiwe siphezulu. I-U4 i-XPT2046 control IC, Umsebenzi wale IC ukuthola i-coordinate vol.tagInani elingu-e lephoyinti lokuthinta lesikrini sokuthinta sokumelana ngamaphinikhodi angu-X+, X –, Y+, kanye no-Y amane, bese ngokuguqulwa kwe-ADC, inani le-ADC lidluliselwe ku-ESP32 master. Inkosi ye-ESP32 ibe isiguqulela inani le-ADC libe inani le-pixel lokudidiyela lesibonisi. Iphinikhodi ye-PEN iyiphinikhodi yokuphazamisa, futhi ileveli yokufaka iphansi uma kwenzeka umcimbi wokuthinta.

I-USB ku-serial port kanye nesekethe yokulanda ngokuchofoza okukodwa

Kulo mbuthano, i-U3 iyi-CH340C USB-to-serial IC, engadingi i-crystal oscillator yangaphandle ukwenza lula ukwakheka kwesekethe. I-C6 iyi-bypass filter capacitor esetshenziselwa ukugcina ivolumu yokufakatage ukuzinza. I-Q1 ne-Q2 zingama-triode ohlobo lwe-NPN, kanti i-R6 ne-R7 yizici zamanje ezikhawulela isisekelo se-triode. Umsebenzi walesi sekethi ukubona ku-USB-to-serial port kanye nomsebenzi wokuchofoza wokulanda. Isiginali ye-USB okokufaka nokuphumayo ngamaphini e-UD+ nawe-UD, futhi idluliselwa ku-ESP32 master ngamaphini e-RXD ne-TXD ngemva kokuguqulwa. Umgomo wesekethe wokuchofoza okukodwa:

A. Amaphinikhodi we-RST kanye ne-DTR we-CH340C okukhipha izinga eliphezulu ngokuzenzakalelayo. Ngalesi sikhathi, i-Q1 ne-Q2 triode ayivuliwe, futhi izikhonkwane ze-IO0 nezikhonkwane zokusetha kabusha zokulawula okuyinhloko kwe-ESP32 zidonselwa ezingeni eliphezulu.
B. Izikhonkwane ze-RST ne-DTR zamazinga aphansi okukhiphayo we-CH340C, ngalesi sikhathi, i-Q1 ne-Q2 triode azikakavulwa, futhi amaphinikhodi e-IO0 namaphinikhodi okusetha kabusha okulawula okuyinhloko kwe-ESP32 kusadonselwa emazingeni aphezulu.
C. Iphinikhodi ye-RST ye-CH340C ihlala ingashintshiwe, futhi iphinikhodi ye-DTR ikhipha izinga eliphezulu. Ngalesi sikhathi, i-Q1 isanqanyuliwe, i-Q2 ivuliwe, iphinikhodi ye-IO0 ye-ESP32 master isadonselwa phezulu, iphinikhodi yokusetha kabusha idonselwa phansi, futhi i-ESP32 ingena esimweni sokusetha kabusha.

D. Iphinikhodi ye-RST ye-CH340C ikhipha izinga eliphezulu, iphinikhodi ye-DTR ikhipha izinga eliphansi, ngalesi sikhathi i-Q1 ivuliwe, i-Q2 icishiwe, iphinikhodi yokusetha kabusha yokulawula okuyinhloko kwe-ESP32 ngeke ibe phezulu ngokushesha ngoba i-capacitor exhunyiwe ishajiwe, i-ESP32 isesimeni sokusetha kabusha, futhi iphinikhodi ye-IO0 izodonswa ngokushesha ngalesi sikhathi, iphinikhodi izodonswa phansi ngokushesha.

Amandla omsindo ampi-lifier circuit

Kule sekethe, u-R23, C7, C8, kanye ne-C9 bakha isekethe yesihlungi se-RC, kanti u-R10 no-R13 yizinqamuleli ezilungisa inzuzo yokusebenza. ampi-lifier. Uma inani lokumelana le-R13 lingashintshiwe, i-value yokuphikiswa encane ye-R10, ivolumu enkulu yesipika sangaphandle. I-C10 ne-C11 zingama-coupling capacitor okokufaka. I-R11 iyisivimbe sokudonsa phezulu. I-JP1 iyimbobo yophondo/yesipikha. I-U5 ingamandla omsindo we-FM8002E ampi-lifier IC. Ngemva kokufaka nge-AUDIO_IN, isignali yomsindo ye-DAC ithi ampkuqinisekiswa inzuzo ye-FM8002E nokuphumayo kusipika/isipika ngamaphinikhodi e-VO1 ne-VO2. I-SHUTDOWN iyiphinikhodi yokunika amandla i-FM8002E. Izinga eliphansi livuliwe. Ngokuzenzakalelayo, izinga eliphezulu livuliwe.

Isekethe yokulawula eyinhloko ye-ESP32 WROOM 32E

Kulo mjikelezo, i-C4 ne-C5 zingama-bypass filter capacitor, kanti i-U2 ingamamojuli ESP32 WROOM 32E. Ukuze uthole imininingwane mayelana nokujikeleza kwangaphakathi kwale mojuli, sicela ubheke imibhalo esemthethweni.

Umjikelezo wokusetha kabusha ukhiye

Kulo mjikelezo, i-KEY1 iyisihluthulelo, i-R4 iyisinqamuleli sokudonsa, futhi i-C3 iyi-capacitor yokulibaziseka. Setha kabusha isimiso:

A. Ngemuva kokukhanyisa, i-C3 iyashaja. Ngalesi sikhathi, i-C3 ilingana nomjikelezo omfushane, iphinikhodi ye-RESET isekelwe, futhi i-ESP32 ingena esimweni sokusetha kabusha.
B. Uma i-C3 ishajwa, i-C3 ilingana nokuvula isekethe, iphinikhodi ye-RESET iyadonswa, ukusetha kabusha kwe-ESP32 kuqediwe, futhi i-ESP32 ingena esimweni esivamile sokusebenza.

C. Uma u-KEY1 icindezelwa, iphinikhodi ye-RESET iba phansi, i-ESP32 ingena esimweni sokusetha kabusha, futhi i-C3 ikhishwe nge-KEY1.
D. Uma i-KEY1 ikhishwa, i-C3 iyashajwa. Ngalesi sikhathi, i-C3 ilingana nokujikeleza okufushane, iphinikhodi ye-RESET isekelwe, i-ESP32 isesesimo se-RESET. Ngemva kokushajwa kwe-C3, iphinikhodi yokusetha kabusha iyadonswa, i-ESP32 isethwe kabusha futhi ingena esimweni sokusebenza esivamile.

Uma UKUSETHWA KABUSHA kungaphumeleli, inani lokubekezelela le-C3 lingakhushulwa ngokufanelekile ukuze kubambezeleke iphinikhodi yokusetha kabusha isikhathi seleveli ephansi.

I-interface circuit ye-serial module

Kulo mjikelezo, i-P2 iyisihlalo se-4P 1.25mm, i-R29 kanye ne-R30 yizinqamuleli zebhalansi ye-impedance, futhi i-Q5 iyishubhu lomphumela wenkundla elawula ukunikezwa kwamandla okufakwayo okungu-5V.

I-R31 iyisivikeli sokudonsa phansi. Xhuma i-RXD0 ne-TXD0 kuma-serial pin, futhi unikeze amandla kwamanye amaphini amabili. Le mbobo ixhunywe kwimbobo ye-serial efanayo nemojuli yembobo ye-USB-to-serial engaphakathi.

I-EX pand IO kanye namasekhethi esixhumi esibonakalayo

Kulo mjikelezo, i-P3 a ne-P4 iyizihlalo ze-4P 1.25mm. I-SPI_CLK, SPI_MISO, nezikhonkwane ze-SPI_MOSI kwabelwana ngazo nezikhonkwane ze-SPI zekhadi le-MicroSD. Izikhonkwane ze-SPI_CS, IO35 azisetshenziswa emishinini yebhodi, ngakho ziholelwa ngaphandle ukuze zixhume i-SPI, futhi zingasetshenziselwa i-IO evamile. Izinto okufanele uziqaphele:

A. I-IO35 ingaba izikhonkwane zokufaka kuphela.

Ukushajwa kwebhethri kanye nesekhethi yokuphathwa kokukhipha

Kule sekethe, i-C20, i-C21, i-C22, ne-C23 ama-bypass filter capacitor. I-U6 iyi-IC yokuphatha ukushajwa kwebhethri ye-TP4054. I-R27 ilawula ukushaja kwebhethri. I-JP2 iyisihlalo sokuphakama esingu-2P 1.25mm, esixhunywe ebhethrini. I-Q3 iyi-P-channel FET. I-R28 iyigridi yokudonsa phansi ye-Q3. I-TP4054 ishaja ibhethri ngephinikhodi ye-BAT; okuncanyana ukumelana no-R27, ukushaja kwamanje kukhudlwana, okuwumkhawulo kungu-500mA. I-Q3 kanye ne-R28 ndawonye bakha isekethe yokukhipha ibhethri, Uma ugesi ungekho ngesixhumi esibonakalayo sohlobo C, i- +5V vol.tagu-e ngu-0, bese isango le-Q3 lidonselwa phansi liye ezingeni eliphansi, i-drain kanye nomthombo kuvuliwe, futhi ibhethri linikeza amandla kuyo yonke imojula yokubonisa. Uma inikwa amandla ngesixhumi esibonakalayo sohlobo C, i-+5V voltagI-e ingu-5V, bese kuthi isango le-Q3 libe ngu-5V ukuphakama, i-drain kanye nomthombo kuyanqanyulwa, futhi ukunikezwa kwebhethri kuyaphazamiseka.

1 8P LCD wire welding interface

Kulo mjikelezo, i-C24 iyi-bypass filter capacitor, futhi i-QD1 iyisixhumi esibonakalayo se-48P 0.8mm pitch liquid crystal welding screen. I-QD1 inephinikhodi yesignali yesikrini sokuthinta, isikrini se-LCD esingu-voltagIphinikhodi ye-e, iphinikhodi yokuxhumana ye-SPI, iphinikhodi yokulawula kanye nephinikhodi yesekethe ye-backlight. I-ESP32 isebenzisa lezi phini ukuze ilawule i-LCD nesikrini sokuthinta.

Landa isekethe yokhiye

Kule sekethe, i-KEY2 ingukhiye kanti u-R5 uyi-pull up resistor. I-IO0 iphezulu ngokuzenzakalelayo futhi iphansi uma u-KEY2 icindezelwa. Cindezela bese ubamba KEY2, vula noma usethe kabusha, futhi i-ESP32 izongena kumodi yokukhipha. Kwezinye izimo, i-KEY2 ingasetshenziswa njengokhiye ojwayelekile.

Isekhethi yokuthola amandla ebhethri

Kule sekethe, u-R2 no-R3 bayingxenye yevolumutagama-e resistors, kanye ne-C1 ne-C2 angama-bypass filter capacitor. Ibhethri voltagI-e BAT+ yokufaka isignali idlula kusihlukanisi. I-BAT_ADC ivolumutagI-e value kuzo zombili iziphetho ze-R3, edluliselwa ku-ESP32 master ngephinikhodi yokufaka bese iguqulwa yi-ADC ukuze ekugcineni ithole ivolumu yebhethri.tage value. UmqulutagI-e divider isetshenziswa ngoba i-ESP32 ADC iguqula ubuningi obungu-3.3V, kuyilapho i-voltage yokugcwala kwebhethritagi-e ingu-4.2V, engekho ebangeni. I-voltagi-e iphindwe ngo-2 ingumthamo webhethri wangempelatage.

I-LCD backlight control circuit

Kule sekethe, i-R24 iwukumelana nokulungisa iphutha futhi iyagcinwa isikhashana. I-Q4 iyishubhu yomphumela wenkundla ye-N-channel, i-R25 iyigridi ye-Q4 yokudonsela phansi, futhi i-R26 iyisivimbeli sokunciphisa i-backlight samanje. I-backlight ye-LCD ye-LED Lamp isesimweni esifanayo, isigxobo esihle sixhunywe ku-3.3V, futhi isigxobo esinegethivu sixhunywe ku-drain ye-Q4. Uma iphinikhodi i-LCD_BL ikhipha ivolumu ephezulutage, amapayipi okukhipha amanzi kanye nomthombo we-Q4 avuliwe. Ngalesi sikhathi, isigxobo esingalungile se-backlight ye-LCD sigxiliwe, kanye ne-backlight LED lamp iyakhanyisa futhi ikhipha ukukhanya.
Uma iphinikhodi i-LCD_BL ikhipha ivolumu ephansitage, i-drain kanye nomthombo we-Q4 kunqanyuliwe, futhi ukukhanya kwe-backlight kwesikrini se-LCD kumisiwe, kanye ne-backlight LED lamp ayivuliwe. Ngokuzenzakalelayo, ukukhanya kwangemuva kwe-LCD kuvaliwe.

Ukunciphisa ukumelana ne-R26 kungakhuphula ukukhanya okukhulu kwe-backlight.
Ngaphezu kwalokho, iphinikhodi ye-LCD_BL ingafaka isignali ye-PWM ukuze ilungise ukukhanya kwe-LCD emuva.

Isifunda sokulawula ukukhanya esinemibala emithathu ye-RGB

Kule sekethe, i-LED2 iyi-RGB enemibala emithathu lamp, futhi u-R14~R16 uwu-l onemibala emithathuamp i-resistor yokukhawulela yamanje.
I-LED2 iqukethe amalambu e-LED abomvu, aluhlaza, naluhlaza okwesibhakabhaka, okuyizixhumanisi ezivamile ze-anode.

IO16, IO17 kanye ne-IO22 izikhonkwane ezintathu zokulawula, ezikhanyisa izibani ze-LED ezingeni eliphansi futhi zicime izibani ze-LED ezingeni eliphezulu.

I-MicroSD card slot interface circuit

Kule sekhethi, i-SD_CARD1 iyimbobo yekhadi le-MicroSD. Ama-R17 kuya ku-R21 ayizinqamuleli zokudonsa iphini ngalinye. I-C26 iyi-bypass filter capacitor. Lesi sixhumi esibonakalayo samukela imodi yokuxhumana ye-SPI. Isekela ukugcinwa kwejubane eliphezulu kwamakhadi e-MicroSD.
Qaphela ukuthi lesi sixhumi esibonakalayo sabelana ngebhasi le-SPI ne-SPI peripheral interface.

Izinyathelo zokuphepha zokusebenzisa imojula yesibonisi

Imojula yokubonisa ishajwa ngebhethri, isipikha sangaphandle sidlala umsindo, futhi isikrini sokubonisa siyasebenza; ngalesi sikhathi, inani lamanje lingadlula i-500mA. Kulokhu, udinga ukunaka ubuningi bamanje obusekelwa ikhebuli yohlobo C kanye nenani eliphezulu lamanje elisekelwa isixhumi esibonakalayo sokuphakelwa kwamandla ukuze ugweme ukunikezwa kwamandla anganele.

Ngesikhathi sokusebenzisa, ungathinti ivolumu ye-LDOtagIsilawuli se-e kanye nokuphathwa kokushajwa kwebhethri IC ngezandla zakho ukugwema ukushiswa amazinga okushisa aphezulu.
Lapho uxhuma imbobo ye-IO, naka ukusetshenziswa kwe-IO ukuze ugweme ukuxhuma kabi futhi nencazelo yekhodi yohlelo ayifani.
Sebenzisa umkhiqizo ngokuphepha nangokunengqondo.

FAQ

Q: Ngingena kanjani ku-samplezinhlelo nemitapo yolwazi yesoftware?
- A: I-sample izinhlelo nemitapo ingatholakala kuhla lwemibhalo 1-_Demo lwencazelo yensiza.
Q: Yimaphi amathuluzi afakwe ku-software yamathuluzi?
- A: Isofthiwe yamathuluzi ihlanganisa i-WIFI ne-Bluetooth yokuhlola i-APP, amathuluzi okulungisa iphutha, i-USB kuya kumshayeli wembobo ye-serial, isofthiwe yethuluzi lokulanda i-ESP32 Flash, isofthiwe yokuthatha izinhlamvu, isofthiwe yokuthatha izithombe, isofthiwe ye-JPG yokucubungula izithombe, namathuluzi e-serial wokususa amaphutha echwebeni.

Amadokhumenti / Izinsiza

I-LCD wiki E32R28T 2.8inch ESP32-32E Display Module [pdf] Imaniwali yosebenzisayo
E32R28T, E32N28T, E32R28T 2.8inch ESP32-32E Display Module, E32R28T, 2.8inch ESP32-32E Display Module, ESP32-32E Display Module, Display Module, Module

Izithenjwa

Imaniwali yosebenzisayo

I-LCD wiki E32R28T 2.8inch ESP32-32E Display Module

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