Yuav ua li cas Bsuab nrovaSensor?

1. Keeb kwm

Feem ntau, thaum peb debug cov nyhuv ntawm lub sensor, peb yuav tsum xub teeb nws, uas tseem hu ua sensor coj. Qhov haujlwm no feem ntau yog ua los ntawm tus tsav tsheb engineer, tab sis qee zaum nws kuj yuav tsum tau ua los ntawm tus kws kho tsheb tuning.

Tab sis qhov tseeb, yog tias nws mus zoo, tom qab teeb tsa lub teeb tsa sensor, i2c chaw nyob, thiab sensor chip_id hauv sensor tsav, daim duab tuaj yeem tsim tawm, tab sis feem ntau, nws feem ntau tsis du, thiab ntau yam teeb meem yuav raug ntsib. .

 

2. Cov txheej txheem nqa nqa sensor

Thov mus rau lub Hoobkas sensor rau qhov yuav tsum tau specifications ntawm lub Sensor teeb, nrog rau kev daws teeb meem, Mclk, ncej tus nqi, me ntsis dav ntawm cov zis cov duab raw, thiab tus naj npawb ntawm mipi_lanes. Yog tias tsim nyog, piav qhia tias qhov siab tshaj plaws mipi tus nqi txhawb nqa los ntawm lub platform tsis tuaj yeem tshaj;

Tom qab tau txais qhov teeb tsa, teeb tsa tus tsav tsheb sensor, ua ntej teeb tsa lub teeb tsa sensor, I2C chaw nyob, chip_id;

Tau txais daim duab schematic ntawm lub motherboard, paub meej tias kho vajtse ntsig txog kev teeb tsa, thiab teeb tsa tus pin tswj mclk, rov pib dua, pwrdn, i2c hauv dts raws li daim duab schematic ntawm lub motherboard;

Tom qab cov kauj ruam saum toj no ua tiav, yog tias tsis muaj teeb meem nrog cov cuab yeej kho vajtse, koj tuaj yeem yooj yim teeb tsa daim duab, thiab tom qab ntawd teeb tsa lub sensor lub sij hawm raug, analog nce thiab lwm yam kev sau npe hauv kev nthuav dav raws li cov ntaub ntawv sensor;

 

3. Cov ntsiab lus ntawm cov teeb meem

a. Yuav ua li cas los txiav txim tus pins ntawm pib dua, pwrdn, i2c, mclk?

Ua ntej tshaj plaws, koj yuav tsum kawm nyeem daim duab schematic. Kuv tsis meej pem heev thaum kuv tau txais daim duab thaum pib. Kuv xav tias muaj ntau yam hauv kev ntxhov siab. Kuv tsis paub yuav pib qhov twg. Qhov tseeb, tsis muaj ntau qhov chaw los saib xyuas. Kuv tsis tas yuav nkag siab tag nrho daim duab.

Vim tias peb feem ntau teeb tsa lub koob yees duab, nrhiav MIPI_CSI interface ib feem, raws li qhia hauv daim duab a, thiab tsuas yog tsom rau cov tswj tus pins ntawm CM_RST_L (pib dua), CM_PWRDN (pwrdn), CM_I2C_SCL (i2c_clk), CM_I2C_SDA (i2c_data), thiab mclk) ua

 

b. I2C ua tsis tau?

Qhov chaw nyob i2c tau teeb tsa tsis raug: Feem ntau, i2c muaj ob qhov chaw nyob, thiab qib sib txawv thaum nws rub los yog nqis.

Txheeb xyuas qhov teeb meem ntawm cov khoom siv hluav taws xob kho vajtse AVDD, DVDD, IOVDD, peb lub zog hluav taws xob ntawm qee qhov khoom siv hluav taws xob tsis tu ncua, thiab qee qhov peb lub zog hluav taws xob yog tswj los ntawm software. Yog tias nws tau tswj hwm los ntawm software, koj yuav tsum tau ntxiv peb lub zog hluav taws xob rau tus tsav tsheb tswj tus pin.

Kev teeb tsa ntawm mclk tus pin tsis yog lawm: koj tuaj yeem siv oscilloscope los ntsuas seb lub moos muab rau lub sensor puas muaj, lossis seb lub moos puas yog, xws li: 24MHz, 27MHz.

I2c pin configuration tsis raug: Feem ntau, koj tuaj yeem tshawb xyuas cov ntaub ntawv sib txuas pinmux-pins ntawm lub ntsiab tswj kom paub meej tias qhov sib thooj GPIO tau raug txhais kom raug;

 

c. Tsis muaj duab lossis txawv txav hauv daim duab;

Nkag mus rau cov lus txib ntawm ISP sab los xyuas seb puas muaj qhov yuam kev hauv kev sib kis ntawm mipi.

Lub teeb liab mipi tuaj yeem ntsuas nrog oscilloscope.

Rub daim duab nyoos kom pom tias muaj qhov txawv txav. Yog tias muaj qhov txawv txav hauv daim duab nyoos, nws feem ntau yog teeb meem nrog qhov teeb tsa sensor. Nug ib tus neeg los ntawm thawj lub Hoobkas sensor los xyuas nws.

Tom qab nce qhov nce, muaj kab txaij ntsug (tseem hu ua FPN), uas muaj feem xyuam rau lub sensor, thiab feem ntau pom cov thawj sensor Hoobkas los nrog;