LCD wiki E32R28T 2.8inch ESP32-32E Bonisa imodyuli yoMsebenzisi

Uvimba weefayili wemithombo ubandakanya sampiiprogram, iilayibrari zesoftware, iinkcukacha zemveliso, imizobo yesakhiwo, ii-database, ischematics, iincwadana zabasebenzisi, kunye nesoftware yesixhobo.
Eli candelo libonelela ngaphezuluview yezixhobo zehardware ezikhoyo kwimodyuli.

Ichaza umzobo weskim semodyuli yokubonisa ngokweenkcukacha.
Inika izilumkiso ekufuneka zithathwe ngelixa usebenzisa imodyuli yokubonisa.

Inkcazelo yezibonelelo

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 miyalelo yenkqubo uxwebhu.
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 umboniso umqhubi ILI9341 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 ampLifier chip FM8002E incwadi yedatha, 5V ukuya 3.3V incwadi yedatha yomlawuli kunye nolawulo lwentlawulo yebhetri Chip TP4054 data sheet.
5-Zocwangco	Imveliso yesixhobo seskimu, i-ESP32-WROOM-32E imodyuli ye-IO yokwabelwa kwezixhobo zetafile, isikimu, kunye nephakheji yecandelo le-PCB
6-Incwadi yokusebenzisa	Amaxwebhu omsebenzisi wemveliso
7-Isixhobo_isoftware	I-WIFI kunye neBluetooth yovavanyo lwe-APP kunye nezixhobo zokulungisa iimpazamo, i-USB kumqhubi we-serial port, i-ESP32 Flash software yokukhuphela isixhobo, isoftware yokuthatha umlinganiswa, isoftware yokuthatha umfanekiso, isoftware yeJPG kunye nezixhobo ze-serial port debugging.
8-Quick_Qalisa	Kufuneka utshise umgqomo file, danyaza isixhobo sokukhuphela, kwaye usebenzise imiyalelo.

Imiyalelo yeSoftware

Bonisa amanyathelo ophuhliso lwesoftware yemodyuli ami ngolu hlobo lulandelayo:

A. Yakha i-ESP32 indawo yophuhliso lwesoftware.

B. Ukuba kuyimfuneko, ngenisa iilayibrari zesoftware yomntu wesithathu njengesiseko sophuhliso;
C. Vula iprojekthi yesoftware ukuze ilungiswe, okanye unokwenza iprojekthi yesoftware entsha.

D. amandla kwimodyuli yokubonisa, qokelela kwaye ukhuphele inkqubo yolungiso lweempazamo, kwaye emva koko ujonge isiphumo esisebenzayo sesoftware.
E. Isiphumo sesoftware asifikeleli ekulindelweyo, qhubeka ulungisa ikhowudi yeprogram, kwaye emva koko uqokelele kwaye ukhuphele, de kube umphumo ufikelele ekulindelweyo.
Ukufumana iinkcukacha malunga namanyathelo andulelayo, bona amaxwebhu kuluhlu lweDemo olu-1.

Hardware Imiyalelo

Ngaphezuluview Uluhlu lwezixhobo zemodyuli ziyaboniswa

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 ngu-24 0x 32 0. I-ESP32 ixhunyiwe usebenzisa i-4-wire SPI yonxibelelwano lwe-interface.
A. Intshayelelo kumlawuli we-ILI9341 Umlawuli we-ILI9341 uxhasa isisombululo esiphezulu se-240 * 320 kunye ne-172800-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 lezibuko ze-I/O, 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 nokudlalwa kwevidiyo, kunye nokubonisa 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.
B. Intshayelelo ye-SPI yonxibelelwano protocol

Ixesha lemowudi yokubhala yebhasi ye-SPI yeentambo ezi-4 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

I-SCL yiwotshi yebhasi ye-SPI, kunye nomphetho ngamnye onyukayo uhambisa 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

ESP32 WROOM 32E M imodyuli

Le modyuli ine-chip ye-ESP32-DOWD-V3 eyakhelwe-ngaphakathi, i-Xtensa dual-core 32-bit LX6 microprocessor, kwaye ixhasa amaxabiso ewotshi ukuya kuthi ga kwi-240MHz. Ine-448KB ROM, 520KB SRAM, 16KB RTC SRAM, kunye ne-4MB QSPI Flash. 2.4GHz WiFi,
IBluetooth V4.2 kunye neBluetooth Low Power modules 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 Three umbala Light

Izibane ezibomvu, eziluhlaza, nebhlowu ze-LED zingasetyenziswa ukubonisa ubume benkqubo.

Uthotho lwezibuko

Imodyuli yothotho lwangaphandle isetyenziselwa unxibelelwano lwezibuko lothotho.

I-USB ukuya kwi-Serial Port kunye nokucofa okukodwa 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.
Ukongeza, isekethe yokukhuphela inqakrazo enye nayo iqhotyoshelwe, oko kukuthi, xa ukhuphela inkqubo, inokungena ngokuzenzekelayo kwimodi yokukhuphela, ngaphandle kwesidingo sokuchukumisa ngaphandle.

Ujongano Lwebhetri

Ujongano lwe-pin ezimbini, enye ye-electrode elungileyo, enye yeye-electrode engalunganga, ukufikelela kumbane webhetri kunye nokutshaja.

Ukutsalwa kwebhetri 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.

Uhlobo lwe-C ujongano

Ujongano lonikezelo lwamandla oluphambili kunye nenkqubo yokukhuphela ujongano 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.

IVoltagi-e regulator circuit ixhasa i-2A V ~ 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 le-IO port, GND, kunye ne-3.3V yephini engasetyenziswanga kwimodyuli ye-ESP32 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 ampisiphaluka 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 wale sekethi kukuqhuba isigodlo samandla esincinci 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.

Inkcazo eneenkcukacha zomzobo weskimu wemodyuli 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 luxhathiso lokutsalela phantsi. I-USB1 yibhasi yohlobo C. Imodyuli yokubonisa idibanisa unikezelo lwamandla ohlobo lwe-C, iinkqubo zokukhuphela, kunye nokunxibelelana nge-USB 1. Apho +5V kunye ne-GND ziyivolthi elungileyo yamandlatage kunye nemiqondiso emhlabeni USB_D kunye USB_D+ iimpawu USB ezahlukeneyo, ezithi zidluliselwe kwi-board USB kwisekethi 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 ohlobo lweCinterface luyi-5V, ngoko ke ivolthitagI-e regulator conversion circuit iyafuneka.

Ulawulo lwesekethe yokulawula isikrini sokuthintela

Kule sekethe, i-C25 kunye ne-C27 zi-capacitors zokucoca i-bypass, ezisetyenziselwa ukugcina i-voltage input.tage uzinzo. I-R22 sisixhasi sokutsalela phezulu esisetyenziselwa ukugcina imo yephini yokumisela iphezulu. U4 yiXPT2046 yolawulo IC, Umsebenzi wale IC kukufumana ulungelelwaniso lwevolthi.tagIxabiso le-touch point ye-screen touch touch ngokusebenzisa i-X +, i-X -, i-Y +, kunye ne-Y ezine izikhonkwane, 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 ze-NPN, kunye ne-R6 kunye ne-R7 ziziseko ze-triode ezinciphisa i-resistors zangoku. Umsebenzi wale sekethi kukuqonda kwi-USB-to-serial port kunye nomsebenzi wokukhuphela ngokucofa. Isignali ye-USB igalelo kunye nemveliso ngokusebenzisa i-UD + kunye ne-UD izikhonkwane, kwaye idluliselwa kwi-ESP32 master nge-RXD kunye ne-TXD izikhonkwane emva kokuguqulwa. Umgaqo wesekethe yokucofa-kanye:

A. I-RST kunye ne-DTR izikhonkwane ze-CH340C ezikhupha umgangatho ophezulu ngokungagqibekanga. Ngeli xesha, i-Q1 kunye ne-Q2 i-triode ayikho, kwaye i-IO0 izikhonkwane kunye nezikhonkwane zokusetha ngokutsha ze-ESP32 ulawulo oluphambili lutsalwa ukuya kumgangatho ophezulu.
B. 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.
C. Iphini ye-RST ye-CH340C ihlala ingatshintshi, kwaye i-DTR pin ikhupha izinga eliphezulu. Ngeli xesha, i-Q1 isanqunyulwa, i-Q2 ivuliwe, i-IO0 pin ye-ESP32 master isatsalwa phezulu, i-pin yokusetha kabusha ikhutshwe, kwaye i-ESP32 ingena kwisimo sokusetha kwakhona.

D. 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 zizixhasi zokulungisa inzuzo yokusebenza. ampisihlanguli. Xa ixabiso lokumelana ne-R13 lingatshintshi, ixabiso elincinci lokuchasana le-R10, likhulu umthamo wesithethi 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 ampibonakaliswe yi-FM8002E inzuzo kunye nemveliso kwisithethi / isithethi nge-VO1 kunye ne-VO2 pins. I-SHUTDOWN sisixhobo sokuvumela i-FM8002E. Umgangatho ophantsi unikwe amandla. Ngokungagqibekanga, umgangatho ophezulu uvuliwe.

I-ESP32 WROOM 32E isiphaluka solawulo oluphambili

Kule sekethe, i-C4 kunye ne-C5 yi-capacitors yokucoca i-bypass, kunye ne-U2 ziimodyuli ze-ESP32 WROOM 32E. Ngeenkcukacha malunga nesekethe yangaphakathi yale modyuli, nceda ujonge kumaxwebhu asemthethweni.

Ukuseta kabusha isekethe

Kule sekethe, i-KEY1 isitshixo, i-R4 yi-resistor yokutsala, kunye ne-C3 yi-capacitor yokulibaziseka. Seta ngokutsha umgaqo:

A. Emva kokukhanyisa, i-C3 ihlawulisa. Ngeli xesha, i-C3 ilingana nesiphaluka esifutshane, i-RESET pin isekelwe, kwaye i-ESP32 ingena kwisimo sokusetha kwakhona.
B. Xa i-C3 ihlawuliswa, i-C3 ilingana nokuvula isiphaluka, i-RESET pin itsalwa phezulu, ukuseta kwakhona kwe-ESP32 kugqityiwe, kwaye i-ESP32 ingena kwimeko yokusebenza eqhelekileyo.

C. Xa i-KEY1 icinezelwe, i-PIN ye-RESET isekelwe phantsi, i-ESP32 ingena kwimeko yokusetha kwakhona, kwaye i-C3 ikhutshwe nge-KEY1.
D. 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 ye-interface yemodyuli 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 phantsi. Qhagamshela i-RXD0 kunye ne-TXD0 kwizikhonkwane zesiriyali, kwaye unikeze amandla kwezinye izikhonkwane ezimbini. Eli zibuko liqhagamshelwe kuthotho lwezibuko njengemodyuli ekwibhodi ye-USB-ukuya kuthotho.

I-EX pand IO kunye neesekethe ze-peripheral interface

Kule sekethe, i-P3 kunye ne-P4 yi-4P 1.25mm izihlalo ze-pitch. SPI_CLK, SPI_MISO, kunye SPI_MOSI izikhonkwane kwabelwana ngekhadi MicroSD izikhonkwane SPI. Izikhonkwane ze-SPI_CS, IO35 azisetyenziswanga kwizixhobo zebhodi, ngoko zikhokelelwa ngaphandle ukudibanisa i-SPI, kwaye zingasetyenziselwa i-IO eqhelekileyo. Izinto ekufuneka uzilumkele:

A. IO35 inokuba zizikhonkwane zokufaka 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-channel FET. I-R28 sisixhasi sokutsalela phantsi kwegridi ye-Q3. I-TP4054 ihlawulisa ibhetri nge-BAT pin; incinci ukuxhathisa i-R27, inkulu ukutshaja okwangoku, kunye nobuninzi be-500mA. I-Q3 kunye ne-R28 kunye zenza isekethe yokukhupha ibhetri, xa kungekho mbane ngoNxibelelwano lweC, +5V vol.tage yi-0, emva koko isango le-Q3 litsalwa phantsi ukuya kwinqanaba eliphantsi, i-drain kunye nomthombo uvuliwe, kwaye ibhetri inika amandla kuyo yonke imodyuli yokubonisa. Xa inikwe amandla ngoNxibelelwano lweC, +5V voltage i-5V, ngoko isango le-Q3 liphezulu i-5V, i-drain kunye nomthombo iyanqunyulwa, kwaye ukunikezelwa kwebhetri kuphazamisekile.

1 8P LCD panel welding interface

Kule sekethe, i-C24 yi-bypass filter capacitor, kunye ne-QD1 yi-48P 0.8mm ye-pitch liquid crystal welding interface. I-QD1 inephini lophawu lokuthintela isikrini, i-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 sekethe, i-KEY2 sisitshixo kwaye i-R5 yi-resistor yokudonsa. IO0 iphezulu ngokungagqibekanga kwaye iphantsi xa i-KEY2 icinezelwe. Cofa kwaye ubambe i-KEY2, vula okanye usete ngokutsha, kwaye i-ESP32 iya kungena kwindlela yokukhuphela. Kwezinye iimeko, i-KEY2 ingasetyenziswa njengeqhosha eliqhelekileyo.

Isekethe yokufumanisa amandla ebhetri

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 umbane webhetri.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 yityhubhu yempembelelo yentsimi ye-N-channel, i-R25 yi-Q4 igridi yokutsalwa phantsi kwegridi, kunye ne-R26 yi-backlight yangoku yokukhawulela i-resistor. Isibane sangasemva se-LCD se-LED lamp ikwimeko ehambelanayo, i-pole positive ixhunywe kwi-3.3V, kwaye i-pole negative ixhunywe kwi-drain ye-Q4. Xa isikhonkwane solawulo LCD_BL iziphumo zomthamo ophezulutage, i-drain kunye neepali zomthombo we-Q4 zivuliwe. Ngeli xesha, i-pali engafanelekanga ye-LCD backlight isekelwe, kunye ne-backlight LED lamp iyalayitwa kwaye ikhupha ukukhanya.
Xa isikhonkwane solawulo LCD_BL sikhupha ivolthi ephantsitage, 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, i-LCD_BL pin inokufaka uphawu lwePWM ukulungisa isibane sangasemva seLCD.

I-RGB yesiphaluka sokulawula ukukhanya kwemibala emithathu

Kule sekethe, i-LED2 yi-RGB enemibala emithathu lamp, kunye ne-R14~R16 ngu-l onemibala emithathuamp isixhasi sokukhawulela sangoku.
I-LED2 iqulethe izibane ezibomvu, eziluhlaza, kunye neziluhlaza ze-LED, ezilunxibelelwano oluqhelekileyo lwe-anode.

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 olujongano lwabelana ngebhasi yeSPI kunye neSPI peripheral interface.

Imiqathango yokusetyenziswa kwemodyuli yokubonisa

Imodyuli yokubonisa ihlawuliswa ngebhetri, isithethi sangaphandle sidlala i-audio, kwaye isikrini sokubonisa siyasebenza; ngeli xesha, itotali yangoku ingadlula i-500mA. Kule meko, kufuneka ubeke ingqalelo ubuninzi obukhoyo obuxhaswe yi-Cable Cable kunye neyona nto ikhoyo ngoku ixhaswe yi-interface yonikezelo lwamandla ukuphepha ukunikezelwa kwamandla okunganeleyo.

Ngexesha lokusetyenziswa, ungachukumisi i-LDO voltagumlawuli kunye nolawulo lwentlawulo yebhetri IC ngezandla zakho ukunqanda ukutshiswa ngamaqondo obushushu aphezulu.
Xa udibanisa i-port ye-IO, qaphela ukusetyenziswa kwe-IO ukuphepha ukudibanisa kunye nenkcazo yekhowudi yeprogram ayifani.
Sebenzisa imveliso ngokukhuselekileyo nangengqiqo.

FAQ

Umbuzo: Ndingena njani kwi-sampiinkqubo kunye namathala eencwadi ekhompyutheni?
- A: I sampiinkqubo kunye namathala eencwadi anokufumaneka kwi-1-_Idemo kavimba wenkcazelo yomthombo.
Q: Zeziphi izixhobo ezibandakanyiweyo kwisoftware yesixhobo?
- A: I-software yesixhobo iquka i-WIFI kunye ne-Bluetooth yokuvavanya i-APP, izixhobo zokulungisa izixhobo, i-USB kumqhubi we-serial port, i-ESP32 Flash yokukhuphela isofthiwe yesixhobo, isofthiwe yokuthatha i-software, isofthiwe yokuthatha umfanekiso, isofthiwe ye-JPG yokucubungula umfanekiso, kunye nezixhobo ze-serial port debugging.

Amaxwebhu / Izibonelelo

LCD wiki E32R28T 2.8inch ESP32-32E Imodyuli yokubonisa [pdf] Incwadi yokusebenzisa
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LCD wiki E32R28T 2.8inch ESP32-32E Imodyuli yokubonisa

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