Tam sim no cia peb qhia txog cov teeb meem uas tau ntsib los ntawm cov phooj ywg uas nyuam qhuav coj MCU los tsav lub vijtsam LCD.
1. Tsis muaj zaub
A: Hardware teeb meem
1: Qhov xwm txheej no yog qhov teeb meem tshwm sim los ntawm ntau tus neeg. Thaum ntsib qhov teeb meem no, thawj zaug sib raug rau cov ntaub ntawv kho vajtse pdf, thiab xyuas kom meej tias tsis muaj teeb meem nrog koj cov xaim. Yog tias nws yog 51 ib leeg-chip microcomputer, koj yuav tsum ntxiv 10K rub-up mus rau PO chaw nres nkoj. Kev tawm tsam, txwv tsis pub nws yuav tsis tshwm sim ib txwm.
2 :: Kuj xyuam xim rau txoj kev sib txuas ntawm tus pin thib peb VO. Qhov no yog tus pin muaj peev xwm. Qhov zawv zawg kawg ntawm 10k qhov sib txawv ntawm qhov sib txawv yog txuas nrog vo tus pin, ib qho kawg ntawm qhov kawg txuas nrog vcc, thiab lwm qhov kawg yuav tsum tau txuas nrog raws li cov khoom siv. Yog tias siv 1602, lwm qhov kawg tuaj yeem txuas nrog gnd. Txawm li cas los xij, rau 12864, 18-pin mark yog siv. Yog hais tias nws yog NC, ces lwm kawg yog grounded. Yog tias nws yog VEE, ces nws txuas nrog 18-pin. Pin 18 yog qhov tsis zoo siab tso zis davhlau ya nyob twg. Raws li qhov no, koj yuav tsum paub tseeb tias koj qhov kev sib piv yog qhov tseeb rau qhov kev hloov pauv kev sib txuas.
3: Rau qhov teeb meem ntawm serial thiab parallel xaiv. Serial Parallel Selection Hais txog 12864 nrog lub tsev qiv ntawv font (1602 plaub-xaim tsav tsheb tseem hu ua serial driver), yog tias muaj PSB tus pin, ces koj lub vijtsam tuaj yeem txhawb nqa serial parallel. Kev xaiv ntawm serial thiab parallel yog txiav txim siab los ntawm lub peev xwm ntawm PSB tus pin. Feem ntau, qib qis yog hom serial, thiab qib siab yog hom sib luag. Qee cov comrades tau txhais lub peev xwm ntawm PSB thaum siv nws, tab sis tsis muaj cov zaub. Qhov no yog vim li cas koj yuav tsum tau xyuam xim rau cov pob qij txha ntawm lub LCM board, tshwj xeeb tshaj yog cov pob qij txha txuas nrog PSB pins uas ua raws li jumpers. Vim tias feem ntau cov tuam ntxhab tau teeb tsa hom kev sib txuas ua ntej thaum lawv tawm hauv lub Hoobkas, uas txuas nrog lub peev xwm siab (VCC). Nyob rau hauv cov ntaub ntawv no, rov solder lub solder sib koom jumper thiab txuas mus rau ib tug tsawg muaj peev xwm. Nws yog ib qho teeb meem me me uas qhov yuam kev xaiv hom tsis tshwm sim. Vim muaj qhov sib txawv ntawm lub vijtsam, koj tuaj yeem ua rau lub vijtsam lossis lub khoos phis tawj ib zaug thaum tsav tsheb. Vim tias qhov kev xaiv tsis raug, lub peev xwm txhais tau sib npaug rau qhov luv luv. Nkag siab.
B: Software teeb meem
Cov teeb meem software feem ntau txhais tau hais tias cov pins tau teev tseg tsis raug. Qhov xwm txheej no tshwm sim rau cov pib tshiab. Thaum luam lwm tus neeg cov kev pab cuam los yog template program ntawm lub vijtsam nws tus kheej, tus pin txhais tsis tau hloov. Qhov xwm txheej no kuj yooj yim. Koj tsuas yog yuav tsum tau hloov cov pins. Tsuas yog redefine qhov chaw nres nkoj sib xws.
Ob, cov zaub tsis meej
A: Lub peev xwm ntawm vo pin (pin 3) ntawm qhov screen tsis yog lawm. Yog tias koj txuas qhov sib piv Circuit Court raws li kuv tau hais los saum toj no, koj tsuas yog yuav tsum tau kho lub pob qhov rooj potentiometer, thiab thaum kawg koj tuaj yeem tau txais qhov sib piv uas koj txaus siab rau thiab ua kom pom qhov tseeb tshaj plaws. Feem ntau, qhov voltage ntawm tus pin no yog hais txog -6.2V, thiab cov nyhuv ntawm qhov voltage yog qhov zoo tshaj plaws.
B: Teeb meem kev siv hluav taws xob
Ntau tus phooj ywg ua qhov kev sim ntawm lub rooj sib tham npaj ua tiav. Lub hwj chim mov yog muab los ntawm USB chaw nres nkoj ntawm lub computer. Nyob rau hauv cov ntaub ntawv no, cov zaub yog feem ntau tsis meej. Yog vim li cas yog lub hwj chim tam sim no tsis txaus, vim US B chaw nres nkoj ntawm lub computer yog 500mA fais fab mov. Hauv cov xwm txheej zoo li no, kev siv hluav taws xob sab nraud tuaj yeem daws tau.
Peb, lwm yam teeb meem
A. Rau qee cov cim nrog lub tsev qiv ntawv font 12864, qee cov cim tsis tuaj yeem tso tawm ib txwm. Qhov no yog ib qho teeb meem ntawm lub compiler, vim hais tias lub compiler yuav cia li lim Oxfd, thiab lub internal code ntawm Suav cim koj xav tso saib tshwm sim rau muaj daim teb no, thiab cov feem ntau yog" peb" thiab" tooj"."" thiab lwm yam, muaj ob txoj hauv kev los daws qhov teeb meem no:;
1: Siv cov cai sab hauv ncaj qha hauv qhov program
2: Ntxiv thaj ua rau thaj rau kev txhim kho (keil) ib puag ncig
B: Txiav txim siab qhov ua haujlwm voltage ntawm qhov screen
Niaj hnub no, muaj ob hom kev siv cov ntxaij vab tshaus: 3.3V thiab 5V. Nco ntsoov xyuas nws, txwv tsis pub lub vijtsam yuav raug hlawv, thiab yuav tsis muaj ntau tshaj 100 yuan. Qhov tseeb, tag nrho 12864 txoj kev xaim yog txhua yam ua tau, tsuas yog ob peb taw VEE, VO, BLA, BLK tsis' tsis paub yuav txuas nws li cas, tam sim no txuas cov kab kos: YXD-12864D-02
