Momwe Mungachitire BkuyimbaaSensa?

1. Mbiri

Kawirikawiri, tikamathetsa vuto la sensa, choyamba timafunika kuiyatsa, yomwe imatchedwanso kuti sensor browningup. Gawo ili la ntchito nthawi zambiri limachitidwa ndi dalaivala, koma nthawi zina limafunikanso kuchitidwa ndi injiniya wokonza.

Koma kwenikweni, ngati zikuyenda bwino, mutatha kukonza sensa, adilesi ya i2c, ndi sensor chip_id mu sensa yoyendetsa, chithunzicho chikhoza kupangidwa, koma nthawi zambiri, nthawi zambiri sichimakhala chosalala, ndipo mavuto ambiri amakumana nawo.

 

2. Njira yobweretsera sensa

Ikani ku fakitale ya masensa kuti mudziwe zofunikira za Sensor setting, kuphatikizapo resolution, Mclk, frame rate, bit width ya output raw image, ndi chiwerengero cha mipi_lane. Ngati kuli kofunikira, fotokozani kuti mipi rate yapamwamba kwambiri yomwe imathandizidwa ndi nsanjayi siingadutse;

Mukamaliza kukonza, sinthani dalaivala wa sensa, choyamba sinthani sensa, adilesi ya I2C, chip_id;

Pezani chithunzi cha bolodi la amayi, tsimikizirani kasinthidwe kogwirizana ndi zida, ndikukonza pin control ya mclk, reset, pwrdn, i2c mu dts malinga ndi chithunzi cha bolodi la amayi;

Pambuyo poti masitepe omwe ali pamwambapa atsirizidwa, ngati palibe vuto ndi zida zamagetsi, mutha kuyatsa chithunzicho, kenako ndikukonza nthawi yowonekera ya sensa, kuchuluka kwa analog ndi ma registers ena mwatsatanetsatane malinga ndi deta ya sensa;

 

3. Chidule cha Vuto

a. Kodi mungadziwe bwanji ma pin a reset, pwrdn, i2c, mclk?

Choyamba, muyenera kuphunzira kuwerenga chithunzi cha schematic. Ndinasokonezeka kwambiri nditapeza chithunzicho pachiyambi. Ndinkaona kuti panali zinthu zambiri zomwe zinali zovuta. Sindinkadziwa koyambira. Ndipotu, palibe malo ambiri oti ndiziyang'anira. Sindikufunika kumvetsetsa chithunzi chonsecho.

Chifukwa timakonza kamera makamaka, timapeza gawo la mawonekedwe a MIPI_CSI, monga momwe zasonyezedwera pa Chithunzi a, ndipo timangoyang'ana kwambiri pa ma pin olamulira a CM_RST_L (reset), CM_PWRDN (pwrdn), CM_I2C_SCL (i2c_clk), CM_I2C_SDA (i2c_data), ndi CM_MCLK (mclk) mmwamba.

 

b. I2C yalephera?

Adilesi ya i2c yakonzedwa molakwika: Kawirikawiri, i2c ili ndi maadiresi awiri, ndipo mulingo wake umasiyana ikakokedwa mmwamba kapena pansi.

Yang'anani vuto la magetsi a hardware AVDD, DVDD, IOVDD, magetsi atatu a hardware ena ndi magetsi osasinthasintha, ndipo magetsi ena atatu amayendetsedwa ndi mapulogalamu. Ngati akuyang'aniridwa ndi mapulogalamu, muyenera kuwonjezera magetsi atatuwa ku driver control pin.

Kapangidwe ka pini ya mclk ndi kolakwika: mungagwiritse ntchito oscilloscope kuti muyese ngati wotchi yomwe yaperekedwa ku sensa ikupezeka, kapena ngati wotchiyo ndi yolondola, monga: 24MHz, 27MHz.

Kakonzedwe kolakwika ka i2c pin: Kawirikawiri, mutha kuyang'ana fayilo yofanana ya pinmux-pins ya main control kuti mutsimikizire ngati GPIO yofananayo yafotokozedwa bwino;

 

c. Palibe chithunzi kapena zachilendo pachithunzicho;

Lowetsani lamulo kumbali ya ISP kuti muwone ngati pali cholakwika mu kutumiza kwa mipi.

Chizindikiro cha mipi chingayesedwe ndi oscilloscope.

Tengani chithunzi chosaphika kuti muwone ngati pali cholakwika chilichonse. Ngati chithunzi chosaphika chili ndi cholakwika, nthawi zambiri chimakhala vuto ndi makina a sensa. Funsani munthu wochokera ku fakitale yoyambirira ya masensa kuti aone.

Pambuyo powonjezera kuchuluka kwa mphamvu, pali mikwingwirima yolunjika (yomwe imatchedwanso FPN), yomwe imagwirizana ndi sensa, ndipo nthawi zambiri imapeza fakitale yoyambirira ya sensa yoti igwire nayo;