LCDWIKI ESP32-32E 2.8inch Display Module User Manual

Mankhwalawa akuphatikizapo zinthu zosiyanasiyana monga sample mapulogalamu, library library, hardware schematics, ndi zina. Onani mndandanda wa Pack Information Pack kuti mumve zambiri.

Malangizo a Mapulogalamu:

Kupanga mapulogalamu a module yowonetsera:

Pangani malo opangira mapulogalamu a ESP32.
Lowetsani malaibulale a pulogalamu ya chipani chachitatu ngati pakufunika.

Tsegulani kapena pangani pulojekiti yamapulogalamu kuti muchotse zolakwika.
Yambitsani gawo lowonetsera, phatikizani, tsitsani pulogalamuyo, ndikuwona zotsatira zake.

Ngati zotsatira zake sizili monga momwe zikuyembekezeredwa, sinthani kachidindo ndikubwereza ndondomekoyi.

Onani zolembedwa mu 1-Demo chikwatu kuti mudziwe zambiri.

Malangizo a Hardware:
Malangizo a Hardware amakupatsani mwayi wowonjezeraview za zothandizira ma module, zojambula zamakonzedwe, ndi njira zodzitetezera kuti zigwiritsidwe ntchito. Onetsetsani kuti mukutsatira malangizowa kuti mugwiritse ntchito moyenera gawo lowonetsera.

Mafunso Ofunsidwa Kawirikawiri

Q: Kodi ndingapeze kuti malangizo oyendetsera chilengedwe cha mapulogalamu?
A: Malangizo okhazikitsa angapezeke mu 1-_Demo chikwatu pamodzi ndi zolemba zina zoyenera.

Q: Kodi miyeso ya module yowonetsera ndi yotani?
A: Kukula kwazinthu ndi zojambula za 3D zitha kupezeka mu gawo la 3-_Structure_Diagram lazinthu zomwe zimapangidwa.

Rsource Description

Buku lothandizira likuwonetsedwa mu chithunzi chotsatirachi:

Directory	Kufotokozera Kwazinthu
1-Chiwonetsero	Aample pulogalamu code, lachitatu chipani mapulogalamu laibulale kuti sample pulogalamu amadalira, lachitatu chipani mapulogalamu laibulale m'malo file, chikalata cha malangizo a kukhazikitsa mapulogalamu a mapulogalamu, ndi sampndi chikalata cha malangizo a pulogalamu.
2 _Kufotokozera	Onetsani mawonekedwe amtundu wazinthu, mawonekedwe a LCD skrini ndi LCD yowonetsa driver IC code yoyambira.
3-Structure_Diagram	Onetsani kukula kwa zinthu za module ndi zojambula za 3D
4- Tsamba lazambiri	Dalaivala wa LCD wowonetsa IL9341, bukhu la data la resistance touch screen XPT2046, ESP32 master data book and hardware design guide document, USB to Serial IC(CH340C) data book, audio amplifier Chip FM8002E deta bukhu, 5V kuti 3.3V deta regulator ndi kasamalidwe batire mtengo Chip TP4054 deta pepala.
5-Zosangalatsa	Zopangira zida zamagetsi, ESP32-WROOM-32E gawo 10 tebulo logawa zinthu, phukusi lachidule la PCB
6-User_Manual	Zolemba za ogwiritsa ntchito
7 ndi- Tool_software	WIFI ndi Bluetooth test APP ndi zida zowonongeka, USB kupita ku serial port driver, ESP32 Flash download tool software, character take-up software, image take-up software, JPG image processing software and serial port debugging tools.
8-Mwachangu_Yambani	Kufunika kuwotcha bin file, kung'anima kutsitsa chida ndi malangizo ntchito.

Malangizo a Mapulogalamu

Njira zowonetsera ma module a pulogalamuyo ndi izi:

Pangani malo opangira mapulogalamu a ESP32;
ngati kuli kofunikira, lowetsani malaibulale a mapulogalamu a chipani chachitatu ngati maziko a chitukuko;

tsegulani pulojekiti yamapulogalamu kuti iwonongeke, mutha kupanganso pulogalamu yatsopano yamapulogalamu;
mphamvu pa gawo lowonetsera, phatikizani ndi kukopera pulogalamu yowonongeka, ndiyeno yang'anani momwe mapulogalamu akuyendera;

zotsatira za pulogalamuyo sizifika zomwe zikuyembekezeredwa, pitilizani kusintha kachidindo ka pulogalamuyo, kenako phatikizani ndikutsitsa, mpaka zotsatira zake zikhala zomwe zikuyembekezeredwa;

Kuti mumve zambiri zazomwe zapitazi, onani zolembedwa mu 1 1-Demo directory.

Malangizo a Hardware

Zathaview Ma module a hardware akuwonetsedwa
Zida za hardware za module zikuwonetsedwa muzithunzi ziwiri zotsatirazi:

Zida za hardware zikufotokozedwa motere:

LCD
Chiwonetsero cha LCD ndi 2.8 mainchesi, dalaivala IC ndi ILI9341, ndipo chisankho ndi 24 0x 32 0. ESP32 imagwirizanitsidwa pogwiritsa ntchito mawonekedwe a 4-waya a SPI.
- Chidziwitso cha wowongolera ILI9341
  Wowongolera ILI9341 amathandizira kusamvana kwakukulu kwa 240 * 320 ndi a172800-byte GRAM. Imathandiziranso ma 8-bit, 9-bit, 16-bit, ndi 18-bit mabasi a data ofanana. Imathandiziranso ma 3-waya ndi ma 4-waya a SPI siriyo madoko. Popeza kuwongolera kofananira kumafuna madoko ambiri a IO, chofala kwambiri ndi SPI serial port control. ILI9341 imathandizanso 65K, 262K RGB mawonetsedwe amtundu, mtundu wowonetsera ndi wolemera kwambiri, pamene akuthandizira mawonedwe ozungulira ndi mawonedwe a mpukutu ndi kusewera mavidiyo, kuwonetsera m'njira zosiyanasiyana.
  Woyang'anira ILI9341 amagwiritsa ntchito 16bit (RGB565) kuwongolera mawonekedwe a pixel, kotero amatha kuwonetsa mpaka mitundu ya 65K pa pixel. Kuyika adilesi ya pixel kumachitika motsatira mizere ndi mizere, ndipo njira yowonjezereka ndi yocheperako imatsimikiziridwa ndi njira yojambulira. Njira yowonetsera ILI9341 imachitika pokhazikitsa adilesi ndikuyika mtengo wamtundu.
- Chiyambi cha SPI communication protocol
  Nthawi yolembera ya basi ya 4 4-waya SPI ikuwonetsedwa pachithunzi chotsatira:
  CSX ndi kusankha tchipisi cha akapolo, ndipo chip chidzayatsidwa kokha pamene CSX ili pamlingo wochepa mphamvu.
  D/CX ndiye pini yowongolera deta / lamulo la chip. Pamene DCX ikulemba malamulo pazigawo zotsika, deta imalembedwa pamtunda wapamwamba SCL ndi wotchi ya basi ya SPI, ndi kukwera kulikonse komwe kumatumiza 1 pang'ono;
  SDA ndi data yofalitsidwa ndi SPI, yomwe imatumiza ma data 8 nthawi imodzi. Mawonekedwe a data akuwonetsedwa pachithunzi chotsatira:
  Pang'ono pang'ono, perekani poyamba.
  Pakulankhulana kwa SPI, data ili ndi nthawi yotumizira, kuphatikiza gawo la wotchi yeniyeni (CPHA) ndi polarity wa wotchi (CPOL):
  Mulingo wa CPOL umatsimikizira kuchuluka kwa wotchi yolumikizana, yokhala ndi CPOL=0, kuwonetsa kutsika. CPOL pair transmission protocol
  Kukambitsirana kunalibe chikoka chachikulu;
  Kutalika kwa CPHA kumatsimikizira ngati wotchi ya synchronous imasonkhanitsa deta pamphepete mwa wotchi yoyamba kapena yachiwiri,
  Pamene CPHL=0, sonkhanitsani deta kumapeto kwa kusintha koyamba;
  Kuphatikiza kwa mitundu iwiriyi njira zinayi zoyankhulirana za SPI, ndipo SPI0 imagwiritsidwa ntchito kwambiri ku China, komwe CPHL=0 ndi CPOL=0
Resistive Touch Screen
Chojambula chogwira ntchito ndi mainchesi 2.8 kukula kwake ndipo chimalumikizidwa ndi XPT2046 control IC kudzera pamapini anayi: XL, XR, YU, YD.
Chithunzi cha ESP32ESP32-WROOMWROOM-32E
Gawoli lili ndi chipangizo cha ESP32-DOWD-V3 chomangidwa, Xtensa dual-core 32-bit LX6 microprocessor, ndipo imathandizira mawotchi mpaka 240MHz. Ili ndi 448KB ROM, 520KB SRAM, 16KB RTC SRAM, ndi 4MB QSPI Flash. 2.4GHz WIFI, Bluetooth V4.2 ndi Bluetooth Low power modules amathandizidwa. Ma GPIO 26 akunja, SD khadi yothandizira, UART, SPI, SDIO, I2C, LED PWM, motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC, TWAI ndi zotumphukira zina.
Khadi la MicroSD Slot
Kugwiritsa ntchito njira yolumikizirana ya SPI ndi kulumikizana kwa ESP32, kuthandizira kwamakhadi a MicroSD amitundu yosiyanasiyana.
RGB Kuwala kwamitundu itatu
Magetsi ofiira, obiriwira ndi abuluu a LED angagwiritsidwe ntchito kusonyeza momwe pulogalamuyo ikugwirira ntchito.
Seri Port
Gawo lakunja la doko lakunja limagwiritsidwa ntchito polumikizana ndi serial port.
USB kupita ku seri Port ndikudina kumodzi Tsitsani Circuit
Chipangizo chachikulu ndi CH340C, mbali imodzi imalumikizidwa ndi kompyuta ya USB, mbali imodzi imalumikizidwa ndi doko la ESP32, kuti mukwaniritse USB kupita kudoko la TTL.
Kuphatikiza apo, kutsitsa kumodzi kokhako kumalumikizidwanso, ndiko kuti, pakutsitsa pulogalamuyo, imatha kulowa munjira yotsitsa, popanda kufunikira kukhudza kunja.
Battery Interface
Maonekedwe a TwoTwo-pin, imodzi ya electrode yabwino, imodzi ya electrode negative, ipeza mphamvu ya batri ndi kulipiritsa.
Battery Charg e ndi Discharge Management Circuit
Chipangizo chachikulu ndi TP4054, derali limatha kuwongolera batire pakalipano, batire imayimbidwa bwino kuti ifike pamalo okhazikika, komanso imatha kuwongolera kutulutsa kwa batri.
BOOT Key
Gawo lowonetsera litayatsidwa, kukanikiza kudzatsitsa IO0. Ngati nthawi yomwe gawoli layatsidwa kapena ESP32 yakhazikitsidwa, kutsitsa IO0 kudzalowa munjira yotsitsa. Nkhani zina zitha kugwiritsidwa ntchito ngati mabatani wamba.
TypeType-C Interface
Chiwonetsero chachikulu chamagetsi ndi pulogalamu yotsitsa mawonekedwe a gawo lowonetsera. Lumikizani USB ku doko la serial ndikudina kamodzi kutsitsa dera, lingagwiritsidwe ntchito popereka mphamvu, kutsitsa ndi kulumikizana kwakanthawi.
5V mpaka 3.3V Voltagndi Regulator Circuit
Chipangizo chachikulu ndi chowongolera cha ME6217C33M5G LDO. Ndi voltagE regulator dera amathandizira 2V ~ 6.5V lonse voltage input, 3.3V khola voltage linanena bungwe, ndipo kutulutsa kwakukulu komweku ndi 800mA, komwe kumatha kukwaniritsa voliyumutage ndi zofunikira zapano za module yowonetsera.
Bwezeraninso Kiyi
Gawo lowonetsera litayatsidwa, kukanikiza kudzakokera pini yokhazikitsiranso ESP32 pansi (malo osakhazikika amakoka), kuti mukwaniritse ntchito yokonzanso.

Resistive Touch Screen Control Circuit
Chipangizo chachikulu ndi XPT2046, chomwe chimalumikizana ndi ESP32 kudzera mu SPI.
Dera ili ndi mlatho pakati pa chotchinga chotchinga chotchinga ndi mbuye wa ESP32, yemwe ali ndi udindo wotumiza zidziwitso pakompyuta kupita kwa mbuye wa ESP32, kuti apeze zolumikizira za malo okhudza.
Wonjezerani Pin
Doko la IO lolowetsa, GND, ndi 3.3V pin th pa sizikugwiritsidwa ntchito pa gawo la ESP32 zimatsogozedwa kuti zigwiritsidwe ntchito pozungulira.
Backlight control circuit
Chipangizo chachikulu ndi BSS138 field effect chubu. Mapeto amodzi a derali amalumikizidwa ndi pini yowongolera kuwala kwa backlight pa ESP32 master, ndipo mbali inayo imalumikizidwa ndi mtengo woyipa wa LCD screen backlight LED l.amp. Pini yowongolera ma backlight imakoka, kuwala kumbuyo, kwina kuzimitsa.

Mawonekedwe a speaker
Mawaya ma terminals ayenera kulumikizidwa molunjika. Amagwiritsidwa ntchito pofikira ma mono speaker ndi zokuzira mawu.
Mphamvu zomvera amp lifier circuit
Chipangizo chachikulu ndi mawu a FM8002E ampwopereka IC. Mapeto amodzi a derali amalumikizidwa ndi pini yotulutsa mtengo ya ESP32 audio DAC ndipo mbali inayo imalumikizidwa ndi mawonekedwe a nyanga. Ntchito ya dera ili ndikuyendetsa kachidutswa kakang'ono ka ho rn kapena speaker to sound. Pamagetsi a 5V, mphamvu yayikulu yoyendetsa ndi 1.5W (katundu 8 ohms) kapena 2W (katundu 4 ohms).
SPI zotumphukira mawonekedwe
4-waya yopingasa mawonekedwe. Tulutsani pini yosankha chip yomwe sinagwiritsidwe ntchito ndi pini yolumikizira ya SPI yogwiritsidwa ntchito ndi khadi ya MicroSD, yomwe ingagwiritsidwe ntchito pazida zakunja za SPI kapena madoko wamba a IO.

Kufotokozera mwatsatanetsatane kwa chithunzi cha schematic cha module yowonetsera

TypeType-C mawonekedwe ozungulira
Muderali, D1 ndi diode ya Schottky, yomwe imagwiritsidwa ntchito kuletsa zomwe zikuchitika kuti zisinthe. D2 mpaka D4 ndi ma electrostatic surge protection diode kuti ateteze gawo lowonetsera kuti lisawonongeke chifukwa champhamvu kwambiri.tage kapena dera lalifupi. R1 ndiye kukana kukokera pansi. USB1 ndi basi ya Type-C. Gawo lowonetsera limalumikizana ndi magetsi a TypeType-C, mapulogalamu otsitsa, ndi kulumikizana kwa doko kudzera pa USB1. Kumene +5V ndi GND ali ndi mphamvu yamphamvu voltage ndi ma siginecha apansi USB_D D- ndi USB_D+ ndi ma siginecha a USB osiyanitsidwa, omwe amatumizidwa kumayendedwe apa USB USB-to-seerial.
5V mpaka 3.3V voltagndi woyang'anira dera
Muderali, C16 ~ C19 ndiye cholumikizira fyuluta, chomwe chimagwiritsidwa ntchito kusungitsa kukhazikika kwa voliyumu yolowera.tage ndi zotuluka voltage. U1 ndi 5V mpaka 3.3V LDO yokhala ndi nambala yachitsanzo ME6217C33M5G. Chifukwa mabwalo ambiri pamagawo owonetsera amafunikira magetsi a 3.3V, ndipo kuyika kwamphamvu kwa mawonekedwe a Type Type-C kwenikweni ndi 5V, kotero vol.tage regulator kutembenuka dera ndi r equired.

Resistive touch screen control circuit
Muderali, C25 ndi C27 ndi bypass fyuluta capacitors, amene ntchito kusunga th e input vol.tagndi kukhazikika. R22 ndi zokokera mmwamba zotsutsa zomwe zimagwiritsidwa ntchito kusunga pini yosasinthika kukhala yokwera. U4 ndi XPT2046 control IC, ntchito ya IC iyi ndikupeza coordinate vol.tage mtengo wa touch point of the resistance touch screen kudzera X+, X X-, Y+, Y Y- four pin, ndiyeno kudzera mu ADC conversion, ADC value is transmitted to ESP32 master. Mbuye wa ESP32 ndiye amasintha mtengo wa ADC kukhala mtengo wogwirizanitsa ma pixel wa chiwonetserocho. Pini ya PEN ndi pini yosokoneza, ndipo mulingo wolowetsa umakhala wotsika pakachitika chochitika.
USB kupita ku doko la serial ndi kutsitsa kumodzi kumodzi
Muderali, U3 ndi CH340C USB USB-to -seerial IC, yomwe sifunikira oscillator yakunja ya kristalo kuti ithandizire kupanga dera. C6 ndi bypass fyuluta capacitor yomwe imagwiritsidwa ntchito kusunga voliyumu yoloweratagndi kukhazikika. Q1 ndi Q2 ndi ma triodes amtundu wa NPN, ndipo R6 ndi R7 ndi ma triode base ochepetsa zopinga zapano. Ntchito ya derali ndikuzindikira USB kupita ku doko la serial ndi kutsitsa kumodzi kumodzi. Chizindikiro cha USB ndikulowetsa ndi kutulutsa kudzera pa UD+ ndi UD UD- mapini, ndipo imatumizidwa kwa mbuye wa ESP32 kudzera pa mapini a RXD ndi TXD mutatha kutembenuka. Kutsitsa kumodzi kumodzi:
- Zikhomo za RST ndi DTR za CH340C zotulutsa mulingo wapamwamba mokhazikika. Pakadali pano, Q1 ndi Q2 triode siziyatsidwa, ndipo ma IO0 ndi mapini obwezeretsanso a ESP32 main control amakokedwa mpaka pamlingo wapamwamba.
- Zikhomo za RST ndi DTR za CH340C zotulutsa zotsika, panthawiyi, Q1 ndi Q2 triode sizilipo, ndipo mapini a IO0 ndi mapini obwezeretsanso a ESP32 akuwongolera akadali amakokedwa mpaka pamwamba.
- Pini ya RST ya CH340C imakhalabe yosasinthika, ndipo pini ya DTR imatulutsa mulingo wapamwamba. Panthawiyi, Q1 ikadadulidwa, Q2 ikugwiritsidwa ntchito, pini ya IO0 ya mbuye wa ESP32 imakokedwabe, ndipo pini yobwezeretsanso imatsitsidwa, ndipo ESP32 imalowa m'malo okonzanso.
- Pini ya CH340C ya RST imatulutsa mulingo wapamwamba, pini ya DTR imatulutsa mulingo wochepa, panthawiyi Q1 yayatsidwa, Q2 yazimitsidwa, pini yokhazikitsiranso ya ESP32 main control siidzakhala yokwera chifukwa cholumikizira cholumikizidwa chikuyimbidwa, ESP32 ikadali mu reset state, ndipo pini ya IO0 ikatsitsidwa nthawi yomweyo imatsitsidwa.

Mphamvu zomvera amplifier circuit
Muderali, R23, C7, C8 ndi C9 amapanga RC fyuluta dera, ndipo R10 ndi R13 ndi mapindu kusintha resistors ntchito. ampmpulumutsi. Pamene mtengo wotsutsa wa R13 sunasinthidwe, mtengo wotsutsa wa R10 wocheperako, wokulirapo wa voliyumu wa wokamba nkhani wakunja. C10 ndi C11 ndi ma coupling capacitors olowa. R11 ndiye chokokera mmwamba chotsutsa. JP1 ndiye doko / doko loyankhulira. U5 ndi mphamvu ya audio ya FM8002E ampwopereka IC. Pambuyo polowetsa ndi AUDIO_IN, siginecha ya audio ya DAC imakhala ampzotsimikiziridwa ndi FM8002E peza d zotulutsa kwa wokamba nkhani/wolankhulira ndi ma VO1 ndi VO2 pini. SHUTDOWN ndiye pini yothandizira FM8002E. Mulingo wochepa umathandizidwa. Mwachikhazikitso, mlingo wapamwamba umathandizidwa.
ESP32-WROOMWROOM-32E main control circuit
Muderali, C4 ndi C5 ndi bypass fyuluta capacitor, ndipo U2 ndi ESP32ESP32-WROOMWROOM-32E modules. Kuti mudziwe zambiri za gawo lamkati la gawoli, chonde onani zolemba zovomerezeka.
Kiyi yobwezeretsanso dera
Muderali, KEY1 ndiye fungulo, R4 ndiye chokoka chokokera mmwamba, ndipo C3 ndiye wochedwa capacitor. Bwezerani mfundo:
- Pambuyo poyatsa mphamvu, C3 imalipira. Panthawiyi, C3 ikufanana ndi dera lalifupi,pini ya RESET imakhazikitsidwa, ESP32 ikulowa mu reset state.
- C3 ikachajitsidwa, C3 imafanana ndi kutsegula dera, pini ya RESET imakokedwa, kubwezeretsanso kwa ESP32 kwatha, ndipo ESP32 imalowa m'malo ogwirira ntchito.
- KEY1 ikakanikizidwa, pini ya RESET imakhazikika, ESP32 imalowa m'malo okonzanso, ndipo C3 imatulutsidwa kudzera mu KEY1.
- KEY1 ikatulutsidwa, C3 imaperekedwa. Panthawiyi, C3 ikufanana ndi dera lalifupi, pini ya RESET imakhazikitsidwa, ESP32 ikadali mu RESET state. C3 ikatha, pini yokhazikitsiranso imakokedwa, ESP32 imakhazikitsidwanso ndikulowa m'malo ogwirira ntchito.
  Ngati RESET sinapambane, mtengo wololera wa C3 ukhoza kuwonjezeka moyenerera kuti muchedwetse pini yobwezeretsanso nthawi yotsika.
Chiyankhulo chozungulira cha serial module
Muderali, P2 ndi 4P 1.25mm phula mpando, R29 ndi R30 ndi impedance balance resistors, ndipo Q5 ndi munda zotsatira chubu kulamulira 5V athandizira magetsi.
R31 ndi chopinga chokokera pansi. Lumikizani RXD0 ndi TXD0 ku ma serial pin, ndikupereka mphamvu kumapini ena awiriwo. Dokoli limalumikizidwa ndi doko lomwelo monga gawo la USB USB-to -seri port.
Wonjezerani IO ndi ma peripheral interface circuit circuit
Muderali, P3 ndi P4 ndi mipando 4P 1.25mm phula. SPI_CLK, SPI_MISO,SPI_MOSI mapini amagawidwa ndi mapini a SPI khadi ya MicroSD. Mapini SPI_CS, IO35 sagwiritsidwa ntchito ndi zida zapa board, chifukwa chake amatsogozedwa kuti alumikizane ndi SPI, ndipo atha kugwiritsidwanso ntchito pa IO wamba. Zomwe muyenera kuyang'anira:
- IO35 ikhoza kukhala ma pi ns;
Battery charge and discharge management circuit
Mu dera ili, C20, C21, C22 ndi C23 ndi bypass fyuluta capacitors. U6 ndiye kasamalidwe ka batire la TP4054 IC. R27 imayang'anira kuchuluka kwa batire. JP2 ndi mpando wa 2P 1.25mm, wolumikizidwa ndi batri. Q3 ndi P P-channel FET. R28 ndi Q3 grid kukokera pansi resistor. TP4054 imayitanitsa batire kudzera pa pini ya BAT, yaying'ono t iye R27 kukana, kukulirapo komwe kulipiritsa, kuchuluka kwake ndi 500mA. Q3 ndi R28 palimodzi amapanga gawo lotulutsa batire, pomwe palibe magetsi kudzera pa mawonekedwe a Type-C, + 5V vol.tage ndi 0, ndiye chipata cha Q3 chimatsitsidwa mpaka pansi, kukhetsa ndi gwero zili, ndipo batri imapereka mphamvu ku gawo lonse lowonetsera. Ikayendetsedwa kudzera pamtundu wa Type-C, +5V voltage ndi 5V, ndiye chipata cha Q3 ndi 5V pamwamba, kukhetsa ndi gwero zimadulidwa, ndipo batire suppl y imasokonekera.
18P LCD gulu waya kuwotcherera mawonekedwe
Muderali, C24 ndi bypass fyuluta capacitor, ndipo QD1 ndi 48P 0.8mmpitch liquid crystal screen kuwotcherera mawonekedwe. QD1 ili ndi pini ya resis tance touch screen, LCD screen voltagpini ya e, pini yolumikizirana ya SPI, pini yowongolera ndi pini yoyendera ma backlight. ESP32 imagwiritsa ntchito zikhomozi kuwongolera LCD ndi touch screen.

Tsitsani makiyi ozungulira
Muderali, KEY2 ndiye fungulo ndipo R5 ndiye chokokera mmwamba. IO0 ndiyokwera kwambiri komanso yotsika pamene KEY2 ikanikizidwa. Dinani ndikugwira KEY2, yambitsani kapena yambitsaninso, ndipo ESP32 idzalowetsamo kutsitsa. Nthawi zina, KEY2 itha kugwiritsidwa ntchito ngati kiyi wamba.
Mphamvu yamagetsi yamagetsi ya batri
Muderali, R2 ndi R3 ndi gawo la voltage resistors, ndi C1 ndi C2 ndi bypass fyuluta capacitors. Mphamvu ya batri voltagKulowetsa kwa ma sign a BAT + kumadutsa pagawo logawanitsa. BAT_ADC ndiye voltage mtengo pamapeto onse a R3, omwe amaperekedwa kwa mbuye wa ESP32 kudzera pa pini yolowera, kenako amasinthidwa ndi ADC kuti pamapeto pake apeze mphamvu ya batri.tagndi mtengo. Voltage divider imagwiritsidwa ntchito chifukwa ESP32 ADC imatembenuza kuchuluka kwa 3.3V, pomwe batire yodzaza mphamvu.tage ndi 4.2V, yomwe ili kunja kwake. Voltage kuchulukitsidwa ndi 2 ndiye batire yeniyeni voltage.
LCD backlight control circuit
Muderali, R24 ndiye kukana kosokoneza ndipo imasungidwa kwakanthawi. Q4 ndi N N-channel field effect chubu, R25 ndiye Q4 grid kukokera pansi resistor, ndipo R26 ndiye backlight current limiting resistor. LCD backlight LED Lamp ili m'malo ofanana, mtengo wabwino umalumikizidwa ndi 3.3V, ndipo mtengo woyipa umalumikizidwa ndi kukhetsa kwa Q4. Pamene pini yowongolera LCD_BL imatulutsa mphamvu zambiritage, kukhetsa ndi gwero la Q4 zimayatsidwa. Panthawiyi, mzati woipa wa LCD backlight wakhazikika, ndi kuwala kwa LED Lamp imayatsidwa ndikutulutsa kuwala.
Pamene pini yowongolera LCD_BL imatulutsa mphamvu yotsikatage, kukhetsa ndi gwero la Q4 zadulidwa, ndipo kuwala koyipa kwa chophimba cha LCD kuyimitsidwa, ndi kuwala kwa LED l.amp sichiyatsidwa. Mwachikhazikitso, LCD backlight yazimitsidwa.
Kuchepetsa kukana kwa R26 kumatha kukulitsa kuwala kowala kwa backlight.
Kuphatikiza apo, pini ya LCD_BL imatha kulowetsa chizindikiro cha PWM kuti isinthe LCD backligh backlight.

RGB yowongolera kuwala kwamitundu itatu
Muderali, LED2 ndi RGB yamitundu itatu lamp, ndipo R14~R16 ndi l yamitundu itatuamp panopa kuchepetsa resistor. LED2 ili ndi magetsi ofiira, obiriwira ndi a buluu a LED, omwe ndi a common anode connection, IO16, IO17 ndi IO22 ndi zikhomo zitatu zowongolera, zomwe zimayatsa nyali za LED pamlingo wochepa ndikuzimitsa nyali za LED pamtunda wapamwamba.
MicroSD khadi slot mawonekedwe dera
Muderali, SD_CARD1 ndi MicroSD khadi slot. R17 mpaka R21 ndi zokokera mmwamba zopinga pa pini iliyonse. C26 ndiye bypass fyuluta capacitor. Mawonekedwewa amatengera njira yolumikizirana ya SPI. Imathandizira kusungirako kwambiri kwamakhadi a MicroSD.
Dziwani kuti interf ace iyi imagawana basi ya SPI ndi mawonekedwe otumphukira a SPI.

Njira zodzitetezera pakugwiritsa ntchito ma module

Ma module owonetsera amaperekedwa ndi batri, wokamba nkhani wakunja amasewera mawu, ndipo chiwonetsero chowonetsera chikugwiranso ntchito, panthawiyi chiwerengero chonsecho chikhoza kupitirira 500mA. Pakadali pano, muyenera kulabadira kuchuluka komweko komwe kumathandizidwa ndi chingwe cha Type-C komanso kuchuluka komwe kumathandizidwa ndi mawonekedwe amagetsi kuti mupewe magetsi osakwanira.
Mukamagwiritsa ntchito, musakhudze voliyumu ya LDOtage regulato r ndi kasamalidwe ka batire IC ndi manja anu kuti musawotchedwe ndi kutentha kwambiri.
Mukalumikiza doko la IO, tcherani khutu ku kagwiritsidwe ntchito ka IO kuti mupewe kusokonekera ndipo tanthauzo la khodi ya pulogalamu silikugwirizana.

Gwiritsani ntchito mankhwalawa mosamala komanso mwanzeru.

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Zolemba / Zothandizira

LCDWIKI ESP32-32E 2.8inch chiwonetsero chazithunzi [pdf] Buku Logwiritsa Ntchito
ESP32-32E 2.8inch Display Module, ESP32-32E, 2.8inch Display Module, Display Module, Module

Maumboni

Buku Logwiritsa Ntchito

LCDWIKI ESP32-32E 2.8inch chiwonetsero chazithunzi

Zambiri Zamalonda

Malangizo Ogwiritsira Ntchito Zogulitsa