LCDWIKI ESP32-32E 2.8inch Display Module Mushandisi Manual

Chigadzirwa chacho chinosanganisira zvinhu zvakasiyana-siyana zvakadai se sample mapurogiramu, maraibhurari esoftware, hardware schematics, nezvimwe. Tarisa kune Chigadzirwa Ruzivo Pack catalog kuti uwane ruzivo rwakadzama.

Software Instruction:

Kugadzira software yekuratidzira module:

Vaka iyo ESP32 papuratifomu software yekuvandudza nharaunda.
Ngenisa wechitatu-bato software maraibhurari kana zvichidikanwa.

Vhura kana gadzira chirongwa chesoftware chekugadzirisa.
Simba pane yekuratidzira module, unganidza, dhawunirodha chirongwa, uye tarisa maitiro.

Kana mhedzisiro isiri sezvaitarisirwa, shandura kodhi uye dzokorora maitiro.

Tarisa kune zvinyorwa zviri mu1-Demo dhairekitori kuti uwane akadzama matanho.

Hardware Mirayiridzo:
Iyo hardware mirairo inopa pamusoroview yemodule zviwanikwa, schematic dhayagiramu, uye matanho ekushandisa. Ita shuwa yekutevedzera aya madhiraivha ekushanda kwakaringana kweanoratidza module.

Mibvunzo Inowanzo bvunzwa

Mubvunzo: Ndingawane kupi iyo software yekuvandudza nharaunda yekumisikidza mirairo?
A: Mirayiridzo yekuseta inogona kuwanikwa mu1-_Demo dhairekitori pamwe nemamwe magwaro akakodzera.

Mubvunzo: Ndeapi zviyero zvemodhi yekuratidzira?
A: Zviyero zvechigadzirwa uye 3D kudhirowa zvinogona kuwanikwa muchikamu che3-_Structure_Diagram chezviwanikwa zvechigadzirwa.

Rsource Description

Iyo resource directory inoratidzwa mumufananidzo unotevera:

Directory	Tsanangudzo Yemukati
1-Demo	Iyo sample purogiramu kodhi, yechitatu-bato software raibhurari iyo sample chirongwa chinotsamira pane, yechitatu-bato software raibhurari kutsiva file, iyo software yekuvandudza nharaunda setup yekuraira gwaro, uye iyo sample chirongwa chekuraira gwaro.
2 _Tsanangudzo	Ratidza module chigadzirwa kutsanangurwa, LCD skrini kutsanangurwa uye LCD kuratidza mutyairi IC yekutanga kodhi.
3-Structure_Diagram	Ratidza module chigadzirwa zviyero uye chigadzirwa 3D kudhirowa
4- DataSheet	LCD kuratidza mutyairi ILL9341 data bhuku, kuramba touch screen driver XPT2046 data book, ESP32 master data book uye hardware dhizaini dhizaini gwaro, USB kuSerial IC(CH340C) bhuku redata, audio amplifier chip FM8002E data bhuku, 5V kusvika 3.3V regulator data bhuku uye bhatiri kuchaja manejimendi Chip TP4054 data sheet.
5-Zvirongwa	Chigadzirwa hardware schematic, ESP32-WROOM-32E module gumi resource yekugovera tafura, schematic uye PCB chikamu pasuru
6-User_Manual	Chigadzirwa chemushandisi zvinyorwa
7I- Tool_software	WIFI neBluetooth test APP uye maturusi ekugadzirisa, USB kune serial port mutyairi, ESP32 Flash download tool software, character take-up software, image take-up software, JPG image processing software uye serial port debugging tools.
8-Kurumidza_Kutanga	Kuda kupisa bhini file, flash download tool uye mirayiridzo yekushandisa.

Software Instructions

Ratidza module software yekuvandudza matanho ndeaya anotevera:

Vaka ESP32 papuratifomu software yekuvandudza nharaunda;
kana zvichidikanwa, pinza wechitatu-bato-software maraibhurari sehwaro hwebudiriro;

vhura iyo software purojekiti kuti igadziriswe, iwe unogona zvakare kugadzira nyowani software purojekiti;
simba pane yekuratidzira module, unganidza uye dhawunirodha chirongwa chekugadzirisa, uye wobva watarisa iyo software inoshanda maitiro;

iyo software mhedzisiro haisviki pane inotarisirwa, ramba uchigadzirisa kodhi yepurogiramu, uye wozounganidza uye kurodha, kusvika mhedzisiro yasvika pane inotarisirwa;

Kuti uwane rumwe ruzivo nezve matanho apfuura, ona zvinyorwa mu 1 1-Demo dhairekitori.

Hardware Instructions

Overview yemodule hardware zviwanikwa inoratidzwa
Module hardware zviwanikwa zvinoratidzwa mune zvinotevera manhamba maviri:

Zviwanikwa zvehardware zvinotsanangurwa sezvizvi:

LCD
Iyo LCD inoratidzira saizi ndeye 2.8 inches, mutyairi IC ndiye ILI9341, uye sarudzo ndeye 24 0x 32 0. ESP32 yakabatana uchishandisa 4-waya SPI yekutaurirana interface.
- Nhanganyaya kune ILI9341 controller
  Iyo ILI9341 controller inotsigira resolution yepamusoro ye240*320 uye a172800-byte GRAM. Inotsigirawo 8-bit, 9-bit, 16-bit, uye 18-bit parallel port data mabhasi. Iyo zvakare inotsigira 3-waya uye 4-waya SPI serial ports. Sezvo parallel control inoda nhamba huru yeIO ports, inonyanya kuzivikanwa ndeye SPI serial port control. Iyo ILI9341 inotsigirawo 65K, 262K RGB kuratidzwa kwemavara, kuratidza ruvara kwakapfuma kwazvo, uku ichitsigira kutenderera kuratidzwa uye kupepeta kuratidza uye kutamba kwevhidhiyo, kuratidza nenzira dzakasiyana siyana.
  Iyo ILI9341 controller inoshandisa 16bit (RGB565) kudzora pixel kuratidza, saka inogona kuratidza anosvika 65K mavara papixel. Iyo pixel kero yekumisikidza inoitwa mukurongeka kwemitsara nemakoramu, uye iyo inowedzera uye inodzikira nzira inotarwa neiyo scanning mode. Iyo ILI9341 nzira yekuratidzira inoitwa nekuseta kero uyezve kuseta kukosha kwemavara.
- Nhanganyaya kune SPI kutaurirana protocol
  Iyo yekunyora modhi yenguva ye4 4-waya SPI bhazi inoratidzwa mumufananidzo unotevera:
  CSX isarudzo yevaranda chip, uye chip inozogoneswa chete kana CSX iri padanho remagetsi rakaderera.
  D/CX ndiyo data/command control pini yechip. Kana DCX ichinyora mirairo pamazinga akaderera, data inonyorwa pamazinga akakwirira SCL ndiyo SPI bhazi wachi, neimwe inosimuka mupendero ichiendesa 1 bit yedata;
  SDA ndiyo data inofambiswa neSPI, iyo inotumira 8 bits yedata kamwechete. Iyo data format inoratidzwa mumufananidzo unotevera:
  Yakakwira zvishoma kutanga, tumira kutanga.
  Pakutaurirana kweSPI, data ine nguva yekufambisa, ine musanganiswa weiyo chaiyo-nguva wachi chikamu (CPHA) uye wachi polarity (CPOL):
  Iyo nhanho yeCPOL inosarudza kusashanda mamiriro eiyo serial synchronous wachi, ine CPOL=0, ichiratidza yakaderera mwero. CPOL pair transmission protocol
  Hurukuro yacho yakanga isina simba guru;
  Kureba kweCPHA kunotarisa kana serial synchronous wachi inounganidza data pane yekutanga kana yechipiri wachi kusvetuka kumucheto,
  Kana CPHL=0, ita kuunganidza data padanho rekutanga shanduko;
  Kubatanidzwa kwezviviri izvi mafomu mana SPI nzira dzekutaurirana, uye SPI0 inowanzoshandiswa kuChina, uko CPHL=0 uye CPOL=0
Resistive Touch Screen
Iyo resistive touch screen ndeye 2.8 inches muhukuru uye yakabatana neXPT2046 control IC kuburikidza nemapini mana: XL, XR, YU, YD.
ESP32ESP32-WROOMWROOM-32E Module
Iyi module ine yakavakirwa-mukati ESP32-DOWD-V3 chip, Xtensa dual-core 32-bit LX6 microprocessor, uye inotsigira wachi mareti kusvika ku240MHz. Iine 448KB ROM, 520KB SRAM, 16KB RTC SRAM, uye 4MB QSPI Flash. 2.4GHz WIFI, Bluetooth V4.2 uye Bluetooth Low power modules inotsigirwa. Ekunze makumi maviri nematanhatu GPIOs, inotsigira SD kadhi, UART, SPI, SDIO, I26C, LED PWM, mota PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC, TWAI uye mamwe maperipherals.
MicroSD Card Slot
Uchishandisa SPI yekutaurirana modhi uye ESP32 yekubatanidza, tsigiro yeMicroSD makadhi eakasiyana siyana.
RGB Matatu-mavara Chiedza
Mwenje tsvuku, girini uye yebhuruu LED inogona kushandiswa kuratidza mamiriro echirongwa.
Serial Port
Iyo yekunze serial port module inoshandiswa kune serial port kutaurirana.
USB kuSerial Port uye Imwe -tinya Dhawunirodha Circuit
Iyo yakakosha mudziyo ndeye CH340C, imwe magumo yakabatana nekombuta USB, imwe magumo yakabatana neESP32 serial port, kuitira kuti uwane USB kune TTL serial port.
Uye zvakare, imwe yekudzvanya kudhawunirodha wedunhu yakasungirirwawo, ndiko kuti, pakurodha chirongwa, inogona otomatiki kupinda iyo yekurodha modhi, pasina chikonzero chekubata nekunze.
Battery Interface
MaviriTwo-pini interface, imwe yeiyo yakanaka electrode, imwe yeasina kunaka electrode, svika iyo bhatiri magetsi uye kuchaja.
Battery Charg e uye Discharge Management Circuit
Chishandiso chepakati iTP4054, dunhu iri rinogona kudzora bhatiri yekuchaja ikozvino, bhatiri rakachajwa zvakachengeteka kune saturation state, asi zvakare rinogona kudzora zvakachengeteka kubuda kwebhatiri.
BOOT Key
Mushure mekunge module yekuratidzira yabatidzwa, kudzvanya kunodzikisa IO0. Kana iyo nguva iyo module yakabatidzwa kana iyo ESP32 ikagadziridzwa, kudzikisa IO0 kunopinza yekurodha modhi. Mamwe makesi anogona kushandiswa seakajairwa mabhatani.
TypeType-C Interface
Iyo huru yekupa magetsi interface uye chirongwa dhawunirodha interface yekuratidzira module. Batanidza USB kune serial port uye imwechete-tinya kurodha wedunhu, inogona kushandiswa kugovera magetsi, kurodha uye serial kutaurirana.
5V kusvika 3.3V Voltage Regulator Circuit
Iyo yakakosha mudziyo ndeye ME6217C33M5G LDO regulator. Th e voltage regulator circuit inotsigira 2V ~ 6.5V yakafara voltage input, 3.3V yakagadzikana voltage kubuda, uye iyo yakanyanya kubuda ikozvino 800mA, iyo inogona kusangana zvizere nevoltage uye zvazvino zvinodikanwa zvekuratidzira module.
RESET Kiyi
Mushure mekunge modhiyo yekuratidzira yabatidzwa, kudzvanya kunodhonza ESP32 reset pini pasi (iyo yakasarudzika mamiriro inodhonza kumusoro), kuitira kuti uwane iyo reset basa.

Resistive Kubata Screen Kudzora Circuit
Iyo yakakosha mudziyo ndeye XPT2046, iyo inotaurirana neESP32 kuburikidza neSPI.
Iri redunhu ndiro bhiriji pakati peresitive touch screen uye ESP32 tenzi, ane basa rekufambisa iyo data pachiratidziro chekubata kune ESP32 tenzi, kuitira kuti uwane zvinorongeka zvepanobata.
Wedzera Pini
Yekupinza IO chiteshi, GND, uye 3.3V pini th pa isingashandiswe paESP32 module inotungamirwa kunze kwekushandiswa kweperipheral.
Backlight control circuit
Iyo yakakosha mudziyo ndeye BSS138 munda maitiro chubhu. Imwe magumo edunhu iri yakabatana nepini yekudzora backlight pane ESP32 tenzi, uye imwe magumo yakabatana neakaipa danda reLCD screen backlight LED l.amp. Backlight control pini dhonza kumusoro, back light, zvikasadaro kure.

Mutauriri interface
Wiring terminals dzinofanira kubatanidzwa vertically. Inoshandiswa kuwana mono speaker nema loudspeakers.
Audio simba amp Lifier circuit
Iyo yakakosha mudziyo ndeye FM8002E odhiyo amplifier IC. Imwe magumo edunhu iri yakabatana neESP32 odhiyo DAC kukosha kwepini yekubuda uye imwe magumo yakabatana kune iyo nyanga interface. Basa redunhu iri kutyaira diki simba ho rn kana speaker kuti inzwike. Kune magetsi e5V, iyo yakanyanya dhiraivha simba ndeye 1.5W (mutoro 8 ohms) kana 2W (mutoro 4 ohms).
SPI peripheral interface
4-waya horizontal interface. Tungamira kunze isina kushandiswa chip pini yekusarudza uye SPI interface pini inoshandiswa neMicroSD kadhi, iyo inogona kushandiswa kune ekunze SPI zvishandiso kana zvakajairika IO ports.

Tsananguro yakadzama yeiyo schematic dhayagiramu yekuratidzira module

TypeType-C interface yedunhu
Mudunhu iri, D1 ndiyo Schottky diode, iyo inoshandiswa kudzivirira ikozvino kubva kumashure. D2 kusvika kuD4 ndeye electrostatic surge dziviriro diode kudzivirira iyo yekuratidzira module kubva mukukuvadzwa nekuda kwekuwanda vol.tage kana dunhu pfupi. R1 ndiko kudhonza-pasi kuramba. USB1 ibhasi Type-C . Iyo yekuratidzira module inobatanidza neTypeType-C magetsi ekupa, kurodha zvirongwa, uye serial port kutaurirana kuburikidza ne USB1. Iko +5V neGND zviri positive simba voltage uye masiginecha epasi USB_D D- uye USB_D+ akasiyana masaini e USB, ayo anofambiswa kune onboard USB USB-ku-serial wedunhu.
5V kusvika 3.3V voltage regulator circuit
Mudunhu iri, C16 ~ C19 ndiyo bypass filter capacitor, iyo inoshandiswa kuchengetedza kugadzikana kweiyo inopinza vol.tage uye goho voltage. Iyo U1 ndeye 5V kusvika 3.3V LDO ine nhamba yemuenzaniso ME6217C33M5G. Nekuti mazhinji emaseketi ari padhizaini module anoda 3.3V magetsi, uye simba rekuisa reType Type-C interface rinonyanya 5V, saka vol.tage regulator shanduko yedunhu inodiwa.

Resistive touch screen control circuit
Mudunhu iri, C25 neC27 ibypass filter capacitors, ayo anoshandiswa kuchengetedza th e input vol.tage kugadzikana. R22 ndeyekudhonza-up resistors inoshandiswa kuchengetedza iyo default pini nyika yakakwira. U4 ndiyo XPT2046 control IC, basa reiyi IC ndere kuwana coordination vol.tage kukosha kweiyo touch point yekupikisa kubata screen kuburikidza neX+, X X-, Y+, Y Y- mana mapini, uyezve kuburikidza neADC kutendeuka, kukosha kweADC kunoendeswa kune ESP32 tenzi. Iyo ESP32 tenzi inobva yashandura kukosha kweADC kune pixel coordinate kukosha kwechiratidziro. Pini yePEN ipini yekubata-bata, uye nhanho yekupinza yakadzikira kana chiitiko chekubata chikaitika.
USB kune serial port uye imwechete-tinya kurodha wedunhu
Mudunhu iri, U3 ndeye CH340C USB USB-ku-serial IC, iyo isingade yekunze crystal oscillator kuti ifambise dhizaini yedunhu. C6 is a bypass sefa capacitor inoshandiswa kuchengetedza vhoriyamu yekupindatage kugadzikana. Q1 neQ2 iNPN mhando nhatu, uye R6 neR7 matriode base inodzikamisa zvinopikisa zvino. Basa redunhu iri kuona USB kune serial port uye imwechete-tinya kurodha basa. Iyo USB siginecha inopinza uye inobuda kuburikidza neUD+ uye UD UD- pini, uye inotumirwa kune ESP32 tenzi kuburikidza neRXD uye TXD mapini mushure mekutendeuka. Imwe-tinya-kamwe kurodha wedunhu musimboti:
- Iyo RST uye DTR mapini eCH340C inoburitsa yakakwira mwero nekusarudzika. Panguva ino, iyo Q1 uye Q2 triode haisi kubatika, uye iyo IO0 mapini uye reset mapini eESP32 main control anodhonzwa kusvika padanho repamusoro.
- Iyo RST neDTR mapini eCH340C inobuda yakaderera mazinga, panguva ino, iyo Q1 neQ2 triode haisati yabatidzwa, uye maIO0 mapini nemapini ereset eESP32 main control achiri kudhonzwa kusvika kumusoro.
- Iyo RST pini yeCH340C inoramba isina kuchinjika, uye iyo DTR pini inoburitsa yakakwira mwero. Panguva ino, Q1 ichiri kugurwa, Q2 iripo, iyo IO0 pini yeESP32 tenzi ichiri kudhonzwa kumusoro, uye pini yekumisikidza inodhonzwa pasi, uye ESP32 inopinda munzvimbo yekumisikidza.
- CH340C's RST pini inoburitsa yakakwira mwero, DTR pini inoburitsa yakaderera, panguva ino Q1 iripo, Q2 yadzimwa, pini reset yeESP32 main control haizove yakakwira nekuti iyo yakabatana capacitor inochajirwa, ESP32 ichiri mu reset state, uye IO0 pini panguva iyi inodonhedzwa pasi, iyo nguva yekudhawunirodha ichadhonzwa pasi pakarepo.

Audio simba ampLifier circuit
Mudunhu iri, R23, C7, C8 neC9 inoumba RC sefa redunhu, uye R10 neR13 ndiyo inogadzirisa zvigadziriso zvekushanda. amplifier. Kana kukosha kwekupikisa kweR13 kusina kuchinjwa, kuduku kukosha kwekupikisa kweR10, iyo yakakura volume yemutauri wekunze. C10 uye C11 ndiwo anopinza coupling capacitors. R11 ndiyo yekudhonza-up resistor. JP1 ndiyo nyanga/mutauri chiteshi. Iyo U5 ndiyo FM8002E redhiyo simba amplifier IC. Mushure mekuisa neAUDIO_IN, iyo odhiyo yeDAC siginecha ndeye ampinokwenenzverwa neFM8002E kuwana d inobuda kumutauri/mutauri nemapini eVO1 neVO2. SHUTDOWN ndiyo pini yekugonesa yeFM8002E. Iyo yakaderera mwero inogoneswa. Nekutadza, chiyero chepamusoro chinogoneswa.
ESP32-WROOMWROOM-32E main control circuit
Mudunhu iri, C4 neC5 ibypass filter capacitors, uye U2 iESP32ESP32-WROOMWROOM-32E modules. Kuti uwane ruzivo nezve yemukati wedunhu remu module iyi, ndapota tarisa kune zviri pamutemo zvinyorwa.
Key reset circuit
Mudunhu iri, KEY1 ndiyo kiyi, R4 ndiyo inodhonza-up resistor, uye C3 ndiyo inononoka capacitor. Reset musimboti:
- Mushure mesimba remagetsi, C3 inochaja. Panguva ino, C3 yakaenzana nepfupi redunhu,RESET pini yakatsikwa, ESP32 inopinda mune reset state.
- Kana C3 ichichajwa, C3 yakaenzana nekuvhura dunhu, RESET pini inodhonzwa kumusoro, ESP32 reset yapera, uye ESP32 inopinda munzvimbo yakajairika yekushanda.
- Kana KEY1 ikadzvanywa, pini yeRESET yakadzikwa, ESP32 inopinda munzvimbo yekumisikidza, uye C3 inoburitswa kuburikidza neKEY1.
- Kana KEY1 yaburitswa, C3 inobhadhariswa. Panguva ino, C3 yakaenzana nepfupi pfupi, RESET pini yakadzikwa, ESP32 ichiri muRESET state. Mushure mekunge C3 yachajwa, pini yekumisikidza inodhonzwa kumusoro, ESP32 inogadzwa patsva uye inopinda munzvimbo yakajairika yekushanda.
  Kana iyo RESET isingabudiriri, kukosha kwekushivirira kweC3 kunogona kukwidziridzwa zvakakodzera kuti kunonoke pini reset yakaderera nhanho nguva.
Interface circuit ye serial module
Mudunhu iri, P2 ndeye 4P 1.25mm pitch seat, R29 uye R30 impedance balance resistors, uye Q5 inzvimbo yemumunda inodzora iyo 5V yekupinza magetsi.
R31 inodhonza-kudzika resistor. Batanidza RXD0 uye TXD0 kune serial pini, uye ipa simba kune mamwe mapini maviri. Chiteshi ichi chakabatana kune imwecheteyo serial port seyaya paboard USB USB-ku-serial port module.
Wedzera IO uye peripheral interface yedunhu matunhu
Mudunhu iri, P3 a uye P4 ndeye 4P 1.25mm pitch zvigaro. SPI_CLK, SPI_MISO,SPI_MOSI mapini anogoverwa neMicroSD card SPI pini. Mapini SPI_CS, IO35 haashandiswe ne-on-board zvishandiso, saka anotungamirwa kuti abatanidze SPI, uye anogona zvakare kushandiswa kune yakajairika IO. Zvinhu zvekutarisira:
- IO35 inogona chete kupinza pi ns;
Battery charge uye discharge management circuit
Mudunhu iri, C20, C21, C22 uye C23 zviri bypass filter capacitors. U6 ndiyo TP4054 bhatiri yekuchaja manejimendi IC. R27 inodzora bhatiri yekuchaja ikozvino. JP2 i2P 1.25mm pitch seat, yakabatana nebhatiri. Q3 iP P-chiteshi FET. R28 ndeye Q3 grid kudhonza-pasi resistor. TP4054 inochaja bhatiri kuburikidza nepini yeBAT, idiki t iye R27 kuramba, iyo hombe yekuchaja ikozvino, iyo yepamusoro i500mA. Q3 neR28 pamwe chete zvinoumba bhatiri rekuburitsa dunhu, kana pasina magetsi kuburikidza neType Type-C interface, iyo +5V vol.tage is 0, ipapo gedhi reQ3 rinodhonzwa pasi kusvika padanho rakaderera, dhiraini uye sosi iripo, uye bhatiri rinopa simba kune yese module yekuratidzira. Kana yaiswa simba kuburikidza neType Type-C interface, iyo +5V voltage is 5V, ipapo gedhi reQ3 rakakwirira 5V, dhiraini uye sosi zvakagurwa, uye bhatiri suppl y rinokanganiswa.
18P LCD panel wire welding interface
Mudunhu iri, C24 ndiyo bypass filter capacitor, uye QD1 ndiyo 48P 0.8mmpitch liquid crystal screen welding interface. Iyo QD1 ine resis tance touch screen pini, LCD skrini voltage pin, SPI yekukurukurirana pini, pini yekudzora uye backlight redunhu pini. Iyo ESP32 inoshandisa mapini aya kudzora LCD uye yekubata sikirini.

Dhawunirodha kiyi yedunhu
Mudunhu iri, KEY2 ndiyo kiyi uye R5 ndiyo inodhonza-up resistor. IO0 yakakwira bydefault uye yakaderera kana KEY2 yakatsikirirwa. Dzvanya uye ubate KEY2, simba kana kusetazve, uye ESP32 ichapinda yekurodha modhi. Mune zvimwe zviitiko, KEY2 inogona kushandiswa sekiyi yakajairika.
Battery power de tection circuit
Mudunhu iri, R2 neR3 dzine chikamu voltage resistors, uye C1 neC2 zviri bypass filter capacitors. Bhatiri voltageBAT + yekuisa chiratidzo inopfuura nemudivider resistor. BAT_ADC ndiro voltage kukosha kumagumo ese eR3, iyo inotumirwa kune ESP32 tenzi kuburikidza nepini yekupinza, uye yozoshandurwa neADC kuti pakupedzisira uwane bhatiri vol.tage value. The voltage divider inoshandiswa nekuti ESP32 ADC inoshandura yakakwira 3.3V, ukuwo bhatiri saturation vol.tage i4.2V, iyo iri kunze kwepakati. The akawana voltage yakapetwa ne2 ndiro chairo bhatiri voltage.
LCD backlight control circuit
Mudunhu iri, R24 ndiyo inopikisa debugging uye inochengetwa kwenguva pfupi. Q4 ndiyo N N-channel field effect chubhu, R25 ndiyo Q4 grid kudhonza-pasi resistor, uye R26 ndiyo backlight ikozvino inodzikamisa resistor. Iyo LCD backlight LED lamp iri muparallel state, danda rakanaka rakabatana ne 3.3V, uye danda risina kunaka rakabatana nekudonha kweQ4. Kana pini yekudzora LCD_BL inoburitsa yakakwira voltage, iyo yekudonhedza uye sosi pole yeQ4 inobatidzwa. Panguva ino, danda rakashata reLCD backlight rakadzikwa, uye backlight LED lamp inobatidzwa uye inoburitsa mwenje.
Kana pini yekudzora LCD_BL inoburitsa yakaderera voltage, iyo yekudonha uye sosi yeQ4 yakagurwa, uye iyo isina kunaka backlight yeLCD skrini inomiswa, uye backlight LED l.amp haina kubatidzwa. By default, LCD backlight yakadzimwa.
Kuderedza iyo R26 kuramba kunogona kuwedzera kupenya kwakanyanya kweiyo backlight.
Pamusoro pezvo, pini yeLCD_BL inogona kuisa chiratidzo chePWM kugadzirisa LCD backligh backlight.

RGB matatu-mavara matatu-mavara ekudzora mwenje wedunhu
Mudunhu iri, LED2 iRGB matatu-mavara matatu lamp, uye R14~R16 itatu-mavara matatu lamp ikozvino kumisa resistor. LED2 ine mwenje tsvuku, yegirinhi uye yebhuruu LED, izvo ar e common anode connection, IO16, IO17 uye IO22 mapini matatu ekudzora, anovhenekera mwenje we LED padanho rakaderera uye anodzima mwenje we LED padanho repamusoro.
MicroSD kadhi slot interface wedunhu
Mudunhu rino, SD_CARD1 ndiyo MicroSD kadhi slot. R17 kusvika kuR21 ndiwo madhonzera ekudhonza-up resistors papini yega yega. C26 ndiyo bypass filter capacitor. Iyi interface yedunhu inotora SPI yekutaurirana modhi. Inotsigira yakakwirira-kumhanya kuchengetedza kweMicroSD makadhi.
Ziva kuti iyi interf ace inogovera SPI bhazi neSPI peripheral interface.

Chengetedzo yekushandisa kuratidza module

Iyo module yekuratidzira inochajirwa nebhatiri, mutauri wekunze anoridza odhiyo, uye skrini yekuratidzira iri kushandawo, panguva ino iyo yakazara ikozvino inogona kudarika 500mA. Muchiitiko ichi, iwe unofanirwa kutarisisa kune yakanyanya ikozvino inotsigirwa neType Type-C tambo uye iyo yakanyanya ikozvino inotsigirwa neiyo magetsi ekuisa interface kudzivirira kusakwana kwemagetsi.
Panguva yekushandiswa, usabata iyo LDO voltage regulato r uye bhatiri kuchaja manejimendi IC nemaoko ako kudzivirira kupiswa nekushisa kwakanyanya.
Kana uchibatanidza iyo IO port, teerera kune iyo IO kushandiswa kudzivirira kukanganisa uye iyo purogiramu kodhi tsanangudzo haienderane.

Shandisa chigadzirwa zvakachengeteka uye zvine musoro.

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Zvinyorwa / Zvishandiso

LCDWIKI ESP32-32E 2.8inch Display Module [pdf] User Manual
ESP32-32E 2.8inch Ratidza Module, ESP32-32E, 2.8inch Ratidza Module, Ratidza Module, Module

References

User Manual

LCDWIKI ESP32-32E 2.8inch Display Module

Product Information

Mirayiridzo Yekushandiswa Kwechigadzirwa