Yuav ua li cas rau Bsuab nrovibLub Sensor?

1. Keeb Kwm

Feem ntau, thaum peb debug qhov cuam tshuam ntawm lub sensor, peb yuav tsum xub ua kom nws ci, uas tseem hu ua sensor bringup. Qhov no ntawm txoj haujlwm feem ntau yog ua los ntawm tus kws tsav tsheb, tab sis qee zaum nws kuj yuav tsum tau ua los ntawm tus kws kho tshuab.

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

 

2. Cov txheej txheem coj los ntawm sensor

Thov rau lub Hoobkas sensor rau cov lus qhia xav tau ntawm qhov chaw Sensor, suav nrog kev daws teeb meem, Mclk, tus nqi thav duab, qhov dav ntawm cov duab raw tso zis, thiab tus lej 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 dhau;

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

Tau txais daim duab qhia txog lub motherboard, paub meej tias qhov kho vajtse cuam tshuam nrog kev teeb tsa, thiab teeb tsa tus pin tswj ntawm mclk, pib dua, pwrdn, i2c hauv dts raws li daim duab qhia txog lub motherboard;

Tom qab ua tiav cov kauj ruam saum toj no, yog tias tsis muaj teeb meem nrog cov khoom siv kho vajtse, koj tuaj yeem ua kom daim duab ci, thiab tom qab ntawd teeb tsa lub sijhawm raug lub sensor, analog nce thiab lwm yam registers kom meej raws li cov ntaub ntawv sensor;

 

3. Kev piav qhia txog teeb meem

a. Yuav ua li cas thiaj paub cov pins ntawm reset, pwrdn, i2c, mclk?

Ua ntej tshaj plaws, koj yuav tsum kawm nyeem daim duab qhia txog qhov teeb meem. Kuv tsis meej pem heev thaum kuv tau txais daim duab thaum pib. Kuv xav tias muaj ntau yam dhau lawm hauv qhov teeb meem. Kuv tsis paub yuav pib qhov twg. Qhov tseeb, tsis muaj ntau qhov chaw uas yuav tsum tau them sai sai. Kuv tsis tas yuav nkag siab tag nrho daim duab.

Vim tias peb feem ntau teeb tsa lub koob yees duab, nrhiav qhov MIPI_CSI interface ib feem, raws li pom hauv Daim Duab a, thiab tsuas yog tsom mus rau cov pins tswj ntawm CM_RST_L (pib dua), CM_PWRDN (pwrdn), CM_I2C_SCL (i2c_clk), CM_I2C_SDA (i2c_data), thiab CM_MCLK (mclk) mus txog.

 

b. I2C tsis ua haujlwm?

Qhov chaw nyob i2c raug teeb tsa tsis raug: Feem ntau, i2c muaj ob qhov chaw nyob, thiab qib sib txawv thaum nws rub mus rau saum lossis nqis.

Tshawb xyuas qhov teeb meem ntawm cov khoom siv fais fab AVDD, DVDD, IOVDD, peb lub zog ntawm qee cov khoom siv yog cov khoom siv fais fab tas li, thiab qee peb lub zog yog tswj los ntawm software. Yog tias nws raug tswj los ntawm software, koj yuav tsum ntxiv peb lub zog no rau tus tsav tsheb tswj tus pin.

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

Kev teeb tsa tus pin i2c tsis raug: Feem ntau, koj tuaj yeem tshawb xyuas cov ntaub ntawv pinmux-pins ntawm qhov kev tswj hwm tseem ceeb kom paub meej tias GPIO sib xws tau txhais kom raug;

 

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

Sau cov lus txib rau sab ISP kom paub seb puas muaj qhov yuam kev hauv kev xa xov ntawm mipi.

Lub teeb liab mipi tuaj yeem ntsuas tau nrog lub oscilloscope.

Mus saib daim duab raw seb puas muaj qhov txawv txav. Yog tias muaj qhov txawv txav hauv daim duab raw, feem ntau nws yog teeb meem nrog qhov chaw teeb tsa sensor. Nug ib tus neeg los ntawm lub Hoobkas sensor thawj zaug los xyuas nws.

Tom qab nce qhov nce, muaj cov kab ntsug (tseem hu ua FPN), uas muaj feem cuam tshuam nrog lub sensor, thiab feem ntau nrhiav lub Hoobkas sensor qub los daws;