I-LCDWIKI ESP32-32E 2.8intshi yokuBonisa iModyuli yeNcwadi yoMsebenzisi

Imveliso ibandakanya izixhobo ezahlukeneyo ezifana sample iinkqubo, iilayibrari zesoftware, ischematics sehardware, nokunye. Jonga kwikhathalogu yePakethi yoLwazi lweMveliso ngolwazi oluthe kratya.

Imiyalelo yeSoftware:

Ukuphuhlisa isoftwe yemodyuli yokubonisa:

Yakha i-ESP32 iqonga lokusingqongileyo lophuhliso lwesoftware.
Thatha ngaphandle iilayibrari zesoftware yomntu wesithathu ukuba kuyimfuneko.

Vula okanye wenze iprojekthi yesoftware yolungiso lweempazamo.
Amandla kwimodyuli yokubonisa, qokelela, khuphela inkqubo, kwaye ujonge umphumo.

Ukuba umphumo awukho njengoko kulindelwe, guqula ikhowudi kwaye uphinde inkqubo.

Jonga kuxwebhu olukwi-1-Demo directory ngamanyathelo aneenkcukacha.

Imiyalelo yeHardware:
Imiyalelo yehardware ibonelela ngaphezuluview yezibonelelo zemodyuli, imizobo yeskim, kunye nezilumkiso zokusetyenziswa. Qinisekisa ukulandela ezi zikhokelo ekusebenzeni ngokufanelekileyo kwemodyuli yokubonisa.

Imibuzo ebuzwa qho

Q: Ndingayifumana phi imiyalelo yokuseta inkqubo yophuhliso lwesoftware?
A: Imiyalelo yokuseta inokufumaneka kulawulo lwe-1-_Demo kunye namanye amaxwebhu afanelekileyo.

Umbuzo: Yeyiphi imilinganiselo yemodyuli yokubonisa?
A: Imilinganiselo yemveliso kunye nemizobo ye-3D inokufumaneka kwi-3-_Structure_Diagram icandelo lezibonelelo zemveliso.

Inkcazelo yoMthombo

Uvimba weefayili wemithombo ubonisiwe kulo mfanekiso ulandelayo:

Uluhlu	Inkcazo yomxholo
1-Idemo	I sample ikhowudi yenkqubo, ilayibrari software yomntu wesithathu ukuba sample nkqubo ixhomekeke, ithala leencwadi lesoftware yomntu wesithathu endaweni file, uxwebhu lomyalelo wocwangciso lophuhliso lwesoftware, kunye nesample uxwebhu lomyalelo wenkqubo.
2 _Inkcazo	Ukucaciswa kwemveliso yemodyuli, ukucaciswa kwesikrini se-LCD kunye ne-LCD yokubonisa umqhubi we-IC ikhowudi yokuqalisa.
3-Ulwakhiwo_Umzobo	Bonisa imilinganiselo yemveliso yemodyuli kunye nemizobo yemveliso ye-3D
4- Ishiti yedatha	LCD umqhubi bonisa Ill9341 incwadi yedatha, ukumelana touch screen umqhubi XPT2046 incwadi yedatha, ESP32 inkosi yedatha incwadi kunye noxwebhu lwesikhokelo soyilo hardware, USB ukuya Uthotho IC(CH340C) incwadi yedata, audio ampI-lifier chip FM8002E yedatha yedatha, i-5V ukuya kwi-3.3V incwadi yedatha yomlawuli kunye nolawulo lwentlawulo yebhetri ye-Chip TP4054 yedatha yedatha.
5-Zocwangco	Imveliso ye-hardware schematic, imodyuli ye-ESP32-WROOM-32E 10 itheyibhile yolwabiwo lwezixhobo, iskimu kunye nephakheji yecandelo lePCB
6-Incwadi yokusebenzisa	Amaxwebhu omsebenzisi wemveliso
7I- Isixhobo_isoftware	I-WIFI kunye neBluetooth yokuvavanya i-APP kunye nezixhobo zokulungisa izixhobo, i-USB kumqhubi we-serial port, i-ESP32 i-Flash download tool software, isofthiwe yokuthatha umlingiswa, isofthiwe yokuthatha umfanekiso, i-software ye-JPG yokucubungula imifanekiso kunye nezixhobo ze-serial port debugging.
8-Quick_Qalisa	Kufuneka utshise umgqomo file, isixhobo sokukhuphela isibane kunye nemiyalelo yokusebenzisa.

Imiyalelo yeSoftware

Bonisa amanyathelo ophuhliso lwesoftware yemodyuli ami ngolu hlobo lulandelayo:

Yakha i-ESP32 indawo yophuhliso lwesoftware;
ukuba kuyimfuneko, ngenisa amathala eencwadi esoftware yomntu wesithathu njengesiseko sophuhliso;

vula iprojekthi yesoftware ukuba ilungiswe, unokwenza kwakhona iprojekthi yesoftware entsha;
amandla kwimodyuli yokubonisa, qokelela kwaye ukhuphele inkqubo yolungiso lweempazamo, kwaye emva koko ujonge isiphumo esisebenzayo sesoftware;

isoftware effect ayifikeleli kulindelweyo, qhubeka ulungisa ikhowudi yeprogram, kwaye emva koko uqokelele kwaye ukhuphele, de isiphumo sifikelele kulindelweyo;

Ukufumana iinkcukacha malunga namanyathelo andulelayo, bona amaxwebhu kuluhlu lwe-1 1-Demo.

Hardware Imiyalelo

Ngaphezuluview yezixhobo zemodyuli zehardware iyaboniswa
Izixhobo zemodyuli zehardware ziboniswa kula manani mabini alandelayo:

Izixhobo zehardware zichazwa ngolu hlobo lulandelayo:

LCD
Ubungakanani bomboniso we-LCD yi-intshi ye-2.8, umqhubi we-IC yi-ILI9341, kunye nesisombululo 24 0x 32 0. I-ESP32 ixhunyiwe usebenzisa i-4-wire SPI yonxibelelwano ujongano.
- Intshayelelo kumlawuli we-ILI9341
  Umlawuli we-ILI9341 uxhasa isisombululo esiphezulu se-240 * 320 kunye ne-a172800-byte GRAM. Ikwaxhasa i-8-bit, 9-bit, 16-bit, kunye ne-18-bit parallel port data bus. Ikwaxhasa i-3-wire kunye ne-4-wire SPI serial port. Ekubeni ulawulo olunxuseneyo lufuna inani elikhulu lamazibuko e-IO, eyona ixhaphakileyo yi-SPI yolawulo lwe-serial port. I-ILI9341 iphinde ixhase i-65K, i-262K RGB umboniso wombala, umbala wokubonisa ucebile kakhulu, ngelixa uxhasa umboniso ojikelezayo kunye nokuskrola umboniso kunye nokudlala kwevidiyo, ukubonisa ngeendlela ezahlukeneyo.
  Umlawuli we-ILI9341 usebenzisa i-16bit (RGB565) ukulawula umboniso we-pixel, ngoko unokubonisa ukuya kwimibala ye-65K ngepikseli nganye. Ukusetwa kwedilesi ye-pixel kwenziwa ngokulandelelana kwemigca kunye neekholamu, kwaye isalathiso esinyukayo kunye esihlayo sichongwa yimodi yokuskena. Indlela yokubonisa i-ILI9341 yenziwa ngokuseta idilesi kwaye emva koko ubeke ixabiso lombala.
- Intshayelelo ye-SPI yonxibelelwano protocol
  Ixesha lendlela yokubhala yebhasi ye-SPI ye-4 4-wire iboniswe kulo mzobo ulandelayo:
  CSX lukhetho lwetshiphu yekhoboka, kwaye itshiphu iya kwenziwa kuphela xa i-CSX ikwinqanaba eliphantsi lamandla.
  I-D/CX yiphini yedatha/yomyalelo wetshiphu. Xa i-DCX ibhala imiyalelo kumanqanaba aphantsi, idatha ibhalwa kumanqanaba aphezulu SCL yiwotshi yebhasi ye-SPI, kunye nomphetho ngamnye okhulayo ohambisa i-1 bit yedatha;
  I-SDA yidatha ehanjiswa yi-SPI, ehambisa i-8 bits yedatha kanye. Ifomathi yedatha iboniswe kulo mfanekiso ulandelayo:
  Inqanaba eliphezulu kuqala, thumela kuqala.
  Kunxibelelwano lwe-SPI, idatha inexesha lothumelo, kunye nendibaniselwano yesigaba sewotshi yexesha langempela (CPHA) kunye ne-polarity yewotshi (CPOL):
  Inqanaba le-CPOL limisela inqanaba lokungenzi nto lewotshi yesiriyali ehambelanayo, kunye ne-CPOL=0, ebonisa umgangatho ophantsi. Iprotokholi yothumelo lwe-CPOL
  Ingxoxo ayizange ibe nempembelelo ingako;
  Umphakamo we-CPHA umisela ukuba iwotshi elandelelanayo iqokelela idatha kumda wokutsiba iwotshi yokuqala okanye yesibini,
  Xa CPHL=0, yenza uqokelelo lwedatha kumda wenguqu yokuqala;
  Ukudityaniswa kwezi ndlela zimbini zeendlela zonxibelelwano ze-SPI, kunye ne-SPI0 isetyenziswa ngokuqhelekileyo e-China, apho i-CPHL=0 kunye ne-CPOL=0
Ikhusi loMbane elichasayo
Isikrini sokuthintela esichasayo si-2.8 intshi ngobukhulu kwaye sixhunywe kwi-XPT2046 yokulawula i-IC ngokusebenzisa izikhonkwane ezine: XL, XR, YU, YD.
Imodyuli ye-ESP32ESP32-WROOMWROOM-32E
Le modyuli ine-chip ye-ESP32-DOWD-V3 eyakhelwe-ngaphakathi, i-Xtensa i-double-core 32-bit LX6 microprocessor, kwaye ixhasa amazinga ewotshi ukuya kwi-240MHz. Ine-448KB ROM, 520KB SRAM, 16KB RTC SRAM, kunye ne-4MB QSPI Flash. I-2.4GHz WIFI, iBluetooth V4.2 kunye neBluetooth Iimodyuli zamandla aphantsi zixhaswa. I-GPIOs yangaphandle ye-26, ikhadi le-SD lenkxaso, i-UART, i-SPI, i-SDIO, i-I2C, i-LED PWM, i-motor PWM, i-I2S, i-IR, i-pulse counter, i-GPIO, i-capacitive touch sensor, i-ADC, i-DAC, i-TWAI kunye nezinye iiperipherals.
Slot yekhadi le-MicroSD
Ukusebenzisa imodi yonxibelelwano ye-SPI kunye noqhagamshelwano lwe-ESP32, inkxaso yamakhadi e-MicroSD yamandla ahlukeneyo.
RGB Ukukhanya okunemibala emithathu
Izibane ze-LED ezibomvu, eziluhlaza kunye neziluhlaza zingasetyenziselwa ukubonisa imeko esebenzayo yeprogram.
Uthotho lwezibuko
Imodyuli yothotho lwangaphandle isetyenziselwa unxibelelwano lwezibuko lothotho.
I-USB ukuya kwi-Serial Port kunye ne-One-cofa Khuphela iSekethe
Isixhobo esiphambili yi-CH340C, enye isiphelo siqhagamshelwe kwi-USB yekhompyuter, enye isiphelo siqhagamshelwe kwi-ESP32 ye-serial port, ukuze kuphunyezwe i-USB kwi-serial port ye-TTL.
Ukongezelela, isekethe yokukhuphela enye inqakrazo enye nayo iqhotyoshelweyo, oko kukuthi, xa ukhuphela inkqubo, inokungena ngokuzenzekelayo kwimodi yokukhuphela, ngaphandle kwesidingo sokuchukumisa ngaphandle.
Ujongano Lwebhetri
Ujongano lwe-Two-pin, enye yeye-electrode elungileyo, enye yeye-electrode engalunganga, ukufikelela kumbane webhetri kunye nokutshaja.
Intlawulo yebhetri kunye neSekethe yoLawulo lokuKhupha
Isixhobo esingundoqo yi-TP4054, le sekethi inokulawula ukutshaja kwebhetri yangoku, ibhetri ihlawuliswe ngokukhuselekileyo kwindawo yokugcwala, kodwa inokulawula ngokukhuselekileyo ukukhutshwa kwebhetri.
Iqhosha le-BOOT
Emva kokuba imodyuli yokubonisa ivuliwe, ukucofa kuya kuthoba i-IO0. Ukuba umzuzwana imodyuli ivuliwe okanye i-ESP32 isetyenzisiwe, ukuthoba i-IO0 kuyakungena kwindlela yokukhuphela. Ezinye iimeko zingasetyenziswa njengamaqhosha aqhelekileyo.
TypeType-C Interface
Ujongano olungundoqo lonikezelo lwamandla kunye neprogram yenza ujongano lokhuphelo lwemodyuli yokubonisa. Xhuma i-USB kwi-port ye-serial kunye nesekethe yokukhuphela okukodwa, ingasetyenziselwa ukunikezelwa kwamandla, ukukhuphela kunye nonxibelelwano lwe-serial.
I-5V ukuya kwi-3.3V Voltage ISekethe yoMlawuli
Isixhobo esingundoqo sisilawuli se-ME6217C33M5G LDO. Th e voltagi-e regulator circuit ixhasa i-2V ~ 6.5V ububanzi voltage igalelo, 3.3V stable voltage-output, kunye nemveliso ephezulu yangoku yi-800mA, enokuthi ihlangabezane ngokupheleleyo ne-voltage kunye neemfuno zangoku zemodyuli yokubonisa.
SETHA kwakhona iqhosha
Emva kokuba imodyuli yokubonisa ivuliwe, ukucinezela kuya kutsala i-ESP32 yokusetha kwakhona iphini phantsi (imeko engagqibekanga itsalwa phezulu), ukuze kuphunyezwe umsebenzi wokuseta kwakhona.

ISekethe yoLawulo lweSkrini sokuLawula iSkrini
Isixhobo esingundoqo yi-XPT2046, enxibelelana ne-ESP32 nge-SPI.
Le ngqungquthela yibhuloho phakathi kwesikrini sokuthintela esichasayo kunye ne-ESP32 master, ejongene nokudlulisa idatha kwi-screen touch kwi-master ESP32, ukwenzela ukuba ufumane i-coordinates ye-touch point.
Yandisa iPin
Igalelo IO port, GND, kunye 3.3V pin th at azisetyenziswanga kwimodyuli yeESP32 zikhokelwe ngaphandle kusetyenziso lweperipheral.
Isekethe yokulawula ukukhanya ngasemva
Isixhobo esingundoqo yi-BSS138 ityhubhu yempembelelo yentsimi. Esinye isiphelo sale sekethi siqhagamshelwe kwiphini yokulawula ukukhanya ngasemva kwi-ESP32 master, kwaye esinye isiphelo siqhagamshelwe kwipali engafanelekanga ye-LCD yesikrini sokukhanyisa ukukhanya kwe-LED l.amp. I-backlight control pin tsala phezulu, ukukhanya ngasemva, kungenjalo icime.

Ujongano lwesithethi
Iitheminali zocingo kufuneka ziqhagamshelwe ngokuthe nkqo. Isetyenziselwa ukufikelela kwi-mono speaker kunye ne-loudspeakers.
Amandla omsindo amp isiphaluka se-lifier
Isixhobo esingundoqo yi-FM8002E yomsindo ampisihlanguli IC. Esinye isiphelo sale sekethi siqhagamshelwe kwi-ESP32 yomsindo we-DAC yokukhupha i-pin yexabiso kwaye esinye isiphelo siqhagamshelwe kwi-interface yephondo. Umsebenzi wesi sekethi kukuqhuba i-ho rn encinci yamandla okanye isithethi kwisandi. Ukunikezelwa kwamandla e-5V, amandla ombane aphezulu yi-1.5W (umthwalo we-8 ohms) okanye i-2W (umthwalo we-4 ohms).
SPI peripheral interface
I-4-wire interface ethe tye. Khokela iphini lokukhetha letshiphu elingasetyenziswanga kunye nephini lojongano lweSPI olusetyenziswa likhadi leMicroSD, elingasetyenziselwa izixhobo zeSPI zangaphandle okanye izibuko ze-IO eziqhelekileyo.

Ingcaciso ebanzi yomzobo weskim semodyuli yokubonisa

Uhlobo lwe-C interface yesekethe
Kule sekethe, i-D1 yi-diode ye-Schottky, esetyenziselwa ukukhusela i-current ekubuyiseleni umva. I-D2 ukuya kwi-D4 ziidiode zokukhusela i-electrostatic surge ukukhusela imodyuli yokubonisa ukuba yonakaliswe ngenxa yomthamo omkhulu.tage okanye isiphaluka esifutshane. I-R1 kukutsalela ezantsi ukuxhathisa. I-USB1 luHlobo lwebhasi yebhasi . Imodyuli yokubonisa idibanisa kwi-TypeType-C yamandla ombane, iinkqubo zokukhuphela, kunye nonxibelelwano lwe-serial port nge-USB1. Apho i-+5V kunye ne-GND zingamandla avumayo voltage kunye nemiqondiso emhlabeni USB_D D- kunye USB_D+ iimpawu USB umahluko, ezithi zidluliselwe kwi-onboard USB USB-ukuya -isekethe yothotho.
5V ukuya kwi-3.3V voltage umlawuli wesekethe
Kulo mjikelezo, i-C16 ~ C19 yi-capacitor yokucoca i-bypass, esetyenziselwa ukugcina ukuzinza kwe-voltage input.tage kunye nesiphumo voltage. I-U1 yi-5V ukuya kwi-3.3V LDO enenombolo yomzekelo i-ME6217C33M5G. Ngenxa yokuba uninzi lweesekethe kwimodyuli yokubonisa zidinga umbane we-3.3V, kwaye igalelo lamandla kuhlobo lwe-C interface luyi-5V, ngoko ke ivolthitagI-e efunekayo yokuguqulwa kwesekethe yesilawuli.

Ulawulo lwesekethe yokulawula isikrini sokuthintela
Kule sekethe, i-C25 kunye ne-C27 zi-capacitors zokucoca, ezisetyenziselwa ukugcina i-voltage input vol.tage uzinzo. I-R22 zizixhasi zokutsalela phezulu ezisetyenziselwa ukugcina isikhonkwane esihlala sihleli siphezulu. I-U4 yi-XPT2046 yolawulo IC, umsebenzi wale IC kukufumana ulungelelwaniso lwevolthi.tagIxabiso le-touch point ye-screen touch touch nge-X +, X X-, Y +, Y Y- ezine izikhonkwane, kwaye emva koko ngokuguqulwa kwe-ADC, ixabiso le-ADC lidluliselwa kwi-ESP32 master. I-ESP32 master iguqula ixabiso le-ADC kwixabiso le-pixel lokulungelelaniswa komboniso. I-PEN pin i-pin yokuphazamisa i-touch pin, kwaye inqanaba lokufaka liphantsi xa kwenzeka isiganeko sokuchukumisa.
I-USB kwi-serial port kunye nokucofa okukodwa kwesekethe yokukhuphela
Kule sekethe, i-U3 yi-CH340C USB-to-serial IC, engadingi i-crystal oscillator yangaphandle ukuququzelela uyilo lwesekethe. I-C6 yi-capacitor yokucoca i-bypass esetyenziselwa ukugcina umthamo wegalelotage uzinzo. I-Q1 kunye ne-Q2 zii-triodes zohlobo lwe-NPN, kunye ne-R6 kunye ne-R7 zi-triode ezisisiseko zokunciphisa i-resistors zangoku. Umsebenzi wale sekethi kukuqonda i-USB kwi-serial port kunye nokucofa okukodwa kokukhuphela umsebenzi. Isiginali ye-USB igalelo kunye nemveliso nge-UD+ kunye ne-UD UD- izikhonkwane, kwaye idluliselwa kwi-ESP32 master nge-RXD kunye ne-TXD izikhonkwane emva kokuguqulwa. Umgaqo wesekethe yokucofa kube kanye:
- I-RST kunye ne-DTR izikhonkwane ze-CH340C ezikhupha umgangatho ophezulu ngokungagqibekanga. Ngeli xesha, i-Q1 kunye ne-Q2 triode azikho, kwaye i-IO0 izikhonkwane kunye nezikhonkwane zokusetha ngokutsha zolawulo oluphambili lwe-ESP32 zitsalwa ukuya kwinqanaba eliphezulu.
- I-RST kunye ne-DTR izikhonkwane ze-CH340C ezikhupha amanqanaba aphantsi, ngeli xesha, i-Q1 kunye ne-Q2 i-triode ayisekho, kwaye i-IO0 izikhonkwane kunye nezikhonkwane zokusetha ngokutsha zolawulo oluphambili lwe-ESP32 zisatsalwa ukuya kumazinga aphezulu.
- Iphini ye-RST ye-CH340C ihlala ingatshintshi, kwaye i-DTR pin ikhupha izinga eliphezulu. Ngeli xesha, i-Q1 isanqunyulwa, i-Q2 ivuliwe, iphini ye-IO0 ye-ESP32 master isatsalwa phezulu, kwaye i-pin yokusetha kabusha ikhutshwe phantsi, kwaye i-ESP32 ingena kwisimo sokusetha kwakhona.
- I-CH340C ye-RST pin ikhupha umgangatho ophezulu, i-DTR pin ikhupha inqanaba eliphantsi, ngeli xesha i-Q1 ivuliwe, i-Q2 icinyiwe, i-pin yokusetha kwakhona ye-ESP32 yolawulo oluphambili ayiyi kuba ngokukhawuleza ely ibe phezulu ngenxa yokuba i-capacitor edibeneyo ihlawuliswa, i-ESP32 ikwimeko yokusetha kwakhona, kwaye i-IO0 pin ifakwe kweli xesha ukukhuphela ngokukhawuleza iya kukhupha.

Amandla omsindo ampisiphaluka se-lifier
Kule sekethi, i-R23, i-C7, i-C8 kunye ne-C9 zenza i-RC filter circuit, kunye ne-R10 kunye ne-R13 yinzuzo yokulungelelanisa i-resistors yokusebenza. ampisihlanguli. Xa ixabiso lokuchasana le-R13 lingatshintshi, ixabiso elincinci lokumelana ne-R10, i-volume enkulu ye-volume yesithethi sangaphandle. I-C10 kunye ne-C11 ziyi-input coupling capacitors. I-R11 sisixhasi sokutsalela phezulu. JP1 luphondo / izibuko isithethi. I-U5 ngamandla omsindo we-FM8002E ampisihlanguli IC. Emva kwegalelo ngu-AUDIO_IN, i-audio DAC isignali ampiqiniswe yi-FM8002E ifumana i-d output kwisithethi/isithethi nge-VO1 kunye ne-VO2 pins. I-SHUTDOWN sisixhobo sokuvumela i-FM8002E. Umgangatho ophantsi unikwe amandla. Ngokungagqibekanga, umgangatho ophezulu uvuliwe.
I-ESP32-WROOMWROOM-32E isiphaluka solawulo oluphambili
Kule sekethe, i-C4 kunye ne-C5 yi-capacitors yokucoca i-bypass, kunye ne-U2 ziimodyuli ze-ESP32ESP32-WROOMWROOM-32E. Ngeenkcukacha malunga nesekethe yangaphakathi yale modyuli, nceda ujonge kumaxwebhu asemthethweni.
Ukuseta kabusha isekethe
Kule sekethe, i-KEY1 isitshixo, i-R4 yi-resistor pull-up, kunye ne-C3 yi-capacitor yokulibaziseka. Seta ngokutsha umgaqo:
- Emva kombane wombane, i-C3 iyabiza. Ngeli xesha, i-C3 ilingana nesekethe emfutshane,I-PIN ye-RESET isekelwe, i-ESP32 ingena kwimeko yokusetha kwakhona.
- Xa i-C3 ihlawuliswa, i-C3 ilingana nokuvula isekethe, i-RESET pin iyatsalwa, ukusetwa kwakhona kwe-ESP32 kugqityiwe, kwaye i-ESP32 ingena kwimeko yokusebenza eqhelekileyo.
- Xa i-KEY1 icinezelwe, i-PIN ye-RESET isekelwe phantsi, i-ESP32 ingena kwimeko yokusetha kwakhona, kwaye i-C3 ikhutshwe nge-KEY1.
- Xa i-KEY1 ikhutshiwe, i-C3 ihlawuliswa. Ngeli xesha, i-C3 ilingana neesekethe ezimfutshane, i-RESET pin isekelwe, i-ESP32 isekwimeko ye-RESET. Emva kokuba i-C3 ihlawulwe, iphini lokuseta ngokutsha liyatsalwa, i-ESP32 iphinda isetyenziswe kwaye ingena kwisimo esiqhelekileyo sokusebenza.
  Ukuba i-RESET ayiphumelelanga, ixabiso lonyamezelo lwe-C3 linokunyuswa ngokufanelekileyo ukulibazisa i-pin yokusetha kwakhona ixesha eliphantsi.
Isekethe yojongano lwemodyuli yothotho
Kule sekethe, i-P2 yi-4P 1.25mm i-pitch seat, i-R29 kunye ne-R30 yi-resistors ye-impedance balance, kunye ne-Q5 yi-tube yempembelelo yentsimi elawula ukunikezelwa kwamandla okufaka i-5V.
I-R31 sisixhasi sokutsalela ezantsi. Qhagamshela i-RXD0 kunye ne-TXD0 kwizikhonkwane zesiriyali, kwaye unikeze amandla kwezinye izikhonkwane ezimbini. Eli zibuko liqhagamshelwe kuthotho lwezibuko njengebhodi ye-USB-ukuya kwimodyuli ye-serial port.
Yandisa i-IO kunye neesekethe ze-peripheral interface
Kule sekethe, i-P3 kunye ne-P4 yi-4P 1.25mm izihlalo ze-pitch. SPI_CLK, SPI_MISO,SPI_MOSI izikhonkwane kwabelwana ngazo nekhadi leMicroSD izikhonkwane zeSPI. Izikhonkwane ze-SPI_CS, i-IO35 azisetyenziswanga kwizixhobo ezikwibhodi, ngoko zikhokelelwa ngaphandle ukudibanisa i-SPI, kwaye zingasetyenziselwa i-IO eqhelekileyo. Izinto ekufuneka uzilumkele:
- IO35 inokuba yi-pi ns kuphela;
Intlawulo yebhetri kunye nesekethe yolawulo lokukhutshwa
Kule sekethe, i-C20, i-C21, i-C22 kunye ne-C23 yi-bypass filter capacitors. I-U6 lulawulo lwentlawulo yebhetri yeTP4054 IC. I-R27 ilawula umsinga wokutshaja kwebhetri. I-JP2 yi-2P 1.25mm pitch seat, eqhagamshelwe kwibhetri. I-Q3 yi-P P-channel FET. I-R28 yi-Q3 igridi yokutsalela ezantsi isixhasi. I-TP4054 ihlawulisa ibhetri ngephini ye-BAT, encinci t i-R27 ukumelana, inkulu ukutshaja okwangoku, ubuninzi be-500mA. I-Q3 kunye ne-R28 kunye zenza isekethe yokukhupha ibhetri, xa kungekho mbane ngoNxibelelwano lwe-Type-C, i-5V vol.tage yi-0, emva koko isango le-Q3 litsalwa phantsi kwinqanaba eliphantsi, i-drain kunye nomthombo uvuliwe, kwaye ibhetri inika amandla kuyo yonke imodyuli yokubonisa. Xa inikwe amandla ngonxibelelwano lwe-Type-C, +5V voltage yi-5V, emva koko isango le-Q3 liphezulu kwi-5V, i-drain kunye nomthombo unqunyulwe, kwaye i-battery suppl y iphazamisekile.
Ipaneli ye-LCD ye-18P i-welding interface ye-wire welding
Kule sekethe, i-C24 yi-bypass filter capacitor, kunye ne-QD1 yi-48P 0.8mmpitch liquid crystal welding interface. I-QD1 ine-resis tance touch screen pin signal, LCD screen voltagI-e pin, ipini yonxibelelwano ye-SPI, i-pin yokulawula kunye ne-backlight circuit circuit. I-ESP32 isebenzisa ezi zikhonkwane ukulawula i-LCD kunye nesikrini sokuchukumisa.

Khuphela isekethe engundoqo
Kule sekethi, i-KEY2 sisitshixo kwaye i-R5 yi-resistor yokutsalela phezulu. IO0 iphezulu ngokungagqibekanga kwaye iphantsi xa i-KEY2 icinezelwe. Cinezela kwaye ubambe i-KEY2, vula okanye usete ngokutsha, kwaye i-ESP32 iya kungena kwindlela yokukhuphela. Kwezinye iimeko, i-KEY2 ingasetyenziswa njengeqhosha eliqhelekileyo.
Amandla ebhetri wokucima isekethe
Kule sekethe, i-R2 kunye ne-R3 ziyi-partial voltage resistors, kunye ne-C1 kunye ne-C2 zii-capacitors zokucoca nge-bypass. Ibhetri voltagI-eBAT + igalelo lomqondiso lidlula kwi-resistor yesahluli. BAT_ADC ngumqulutagixabiso kuzo zozibini iziphelo ze-R3, egqithiselwa kwi-ESP32 master nge-pin yokufaka, kwaye emva koko iguqulwe yi-ADC ukuze ekugqibeleni ifumane i-volt yebhetri.tagixabiso e. UmqulutagI-e divider isetyenziswa ngenxa yokuba i-ESP32 ADC iguqula ubuninzi be-3.3V, ngelixa ibhetri ye-saturation vol.tage yi-4.2V, engaphandle koluhlu. Umqulu ofunyenweyotagi-e iphindaphindwe ngo-2 ngowona mthamo webhetritage.
LCD backlight control circuit
Kule sekethi, i-R24 luxhathiso lokulungiswa kweempazamo kwaye igcinwe okwethutyana. I-Q4 yi-tube ye-N N-channel yempembelelo yentsimi, i-R25 yi-Q4 igridi yokutsalela phantsi, kunye ne-R26 yi-backlight yangoku yokukhawulela i-resistor. Isibane sangasemva se-LCD se-LED lamp ikwimeko ehambelanayo, i-polepositive ixhunywe kwi-3.3V, kwaye i-pole negative ixhunywe kwi-drain ye-Q4. Xa isikhonkwane solawulo LCD_BL iziphumo zomthamo ophezulutage, i-drain kunye ne-source pole ye-Q4 ivuliwe. Ngeli xesha, i-pali engafanelekanga ye-LCD backlight isekelwe, kunye ne-backlight LED lamp iyalayitwa kwaye ikhupha ukukhanya.
Xa isikhonkwane solawulo LCD_BL sikhupha umthamo ophantsitage, umsele kunye nomthombo we-Q4 unqunyulwe, kwaye ukukhanya okungekuhle kwesikrini se-LCD kunqunyanyisiwe, kunye ne-backlight LED l.amp ayivulwanga. Ngokungagqibekanga, i-backlight ye-LCD icinyiwe.
Ukunciphisa ukuxhathisa kwe-R26 kunokunyusa ukukhanya okuphezulu kokukhanya ngasemva.
Ukongeza, isikhonkwane seLCD_BL sinokufaka isiginali yePWM ukunyenyisa isibane sangasemva seLCD.

I-RGB yesekethe yokulawula ukukhanya kwemibala emithathu
Kule sekethe, i-LED2 yi-RGB emithathu-mibala emithathu lamp, kunye ne-R14~R16 yi-l enemibala emithathuamp isixhasi sokukhawulela sangoku. I-LED2 iqulethe izibane ze-LED ezibomvu, eziluhlaza kunye nohlaza okwesibhakabhaka, okuyi-ar e common anode connection, IO16, IO17 kunye ne-IO22 zizikhonkwane ezintathu zokulawula, ezikhanyisa izibane ze-LED kwinqanaba eliphantsi kunye nokucima izibane ze-LED kwinqanaba eliphezulu.
MicroSD ikhadi slot interface yesekethe
Kule sekethi, SD_CARD1 yiMicroSD khadi slot. I-R17 ukuya kwi-R21 zizixhasi zokutsalela phezulu kwiphini ngalinye. I-C26 yi-capacitor yokucoca i-bypass. Le sekethe yojongano ithatha imo yonxibelelwano ye-SPI. Ixhasa ukugcinwa kwesantya esiphezulu samakhadi e-MicroSD.
Qaphela ukuba le interf ace yabelana ngebhasi yeSPI kunye neSPI peripheral interface.

Imiqathango yokusetyenziswa kwemodyuli yokubonisa

Imodyuli yokubonisa ihlawuliswa ibhetri, isithethi sangaphandle sidlala i-audio, kwaye isikrini sokubonisa siyasebenza, ngeli xesha inani langoku lingadlula i-500mA. Kule meko, kufuneka ubeke ingqalelo kubuninzi obukhoyo obuxhaswe yi-Cable Type-C cable kunye neyona nto ikhoyo ngoku ixhaswe yi-interface yokubonelela ngombane ukuphepha ukunikezelwa kwamandla anganeleyo.
Ngexesha lokusetyenziswa, ungachukumisi i-LDO voltage regulato r kunye nolawulo lwentlawulo yebhetri IC ngezandla zakho ukuphepha ukutshiswa ngubushushu obuphezulu.
Xa udibanisa i-port ye-IO, qaphela ukusetyenziswa kwe-IO ukuphepha ukudibanisa kunye nenkcazo yekhowudi yeprogram ayifani.

Sebenzisa imveliso ngokukhuselekileyo kwaye uqiqe ngokufanelekileyo.

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LCDWIKI ESP32-32E 2.8intshi yokubonisa imodyuli [pdf] Incwadi yokusebenzisa
ESP32-32E 2.8inch Imodyuli yokubonisa, ESP32-32E, 2.8inch imodyuli yokubonisa, imodyuli yokubonisa, imodyuli

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LCDWIKI ESP32-32E 2.8intshi yokubonisa imodyuli

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