Yadda ake yin BringupwaniFirikwensin?

1. Bayani

Gabaɗaya, idan muka gyara tasirin na'urar firikwensin, da farko muna buƙatar kunna shi, wanda kuma ake kira da na'urar buɗewa. Wannan ɓangaren aikin galibi injiniyan direba ne ke yin sa, amma wani lokacin kuma injiniyan gyarawa ne ke yin sa.

Amma a zahiri, idan ya yi kyau, bayan saita saitunan firikwensin, adireshin i2c, da firikwensin chip_id a cikin direban firikwensin, ana iya samar da hoton, amma a mafi yawan lokuta, sau da yawa ba shi da santsi sosai, kuma za a ci karo da matsaloli da yawa.

 

2. Tsarin ɗaga firikwensin

Aika zuwa masana'antar firikwensin don takamaiman bayanai da ake buƙata na saitin Sensor, gami da ƙuduri, Mclk, ƙimar firam, faɗin bit na hoton da aka fitar, da adadin mipi_lanes. Idan ya cancanta, bayyana cewa matsakaicin ƙimar mipi da dandamali ke tallafawa ba za a iya wuce shi ba;

Bayan samun saitin, saita direban firikwensin, da farko saita saitin firikwensin, adireshin I2C, chip_id;

Sami zane-zanen tsarin motherboard, tabbatar da tsarin da ya shafi hardware, kuma saita ikon sarrafa fil na mclk, sake saitawa, pwrdn, i2c a cikin dts bisa ga zane-zanen tsarin motherboard;

Bayan an kammala matakan da ke sama, idan babu matsala da kayan aikin, za ku iya haskaka hoton, sannan ku saita lokacin fallasa na'urar firikwensin, ribar analog da sauran rajista dalla-dalla bisa ga takardar bayanai ta na'urar firikwensin;

 

3. Takaitaccen bayani game da matsalar

a. Yadda ake tantance fil ɗin sake saitawa, pwrdn, i2c, mclk?

Da farko dai, dole ne ka koyi karanta zane-zanen zane. Na rikice sosai lokacin da na sami zane a farkon. Na ji cewa akwai abubuwa da yawa a cikin rikici. Ban san inda zan fara ba. A gaskiya ma, babu wurare da yawa da zan kula da su. Ba na buƙatar fahimtar cikakken zane.

Domin galibi muna saita kyamarar, nemo ɓangaren haɗin MIPI_CSI, kamar yadda aka nuna a Hoto na a, kuma kawai a mai da hankali kan fil ɗin sarrafawa na CM_RST_L (sake saitawa), CM_PWRDN (pwrdn), CM_I2C_SCL (i2c_clk), CM_I2C_SDA (i2c_data), da CM_MCLK (mclk) sama

 

b. I2C ya gaza?

An tsara adireshin i2c ba daidai ba: Gabaɗaya, i2c yana da adiresoshi guda biyu, kuma matakin ya bambanta lokacin da aka ja shi sama ko ƙasa.

Duba matsalar samar da wutar lantarki ta hardware AVDD, DVDD, IOVDD, samar da wutar lantarki guda uku na wasu hardware wutar lantarki ce mai ci gaba, kuma wasu samar da wutar lantarki guda uku software ne ke sarrafa su. Idan software ne ke sarrafa su, kuna buƙatar ƙara waɗannan samar da wutar lantarki guda uku zuwa fil ɗin sarrafa direba.

Tsarin fil ɗin mclk ba daidai ba ne: za ku iya amfani da oscilloscope don auna ko agogon da aka ba wa firikwensin yana samuwa, ko kuma ko agogon daidai ne, kamar: 24MHz, 27MHz.

Tsarin fil ɗin i2c mara daidai: Gabaɗaya, zaku iya duba fayil ɗin pinmux-pins ɗin da ya dace na babban sarrafawa don tabbatar da ko an bayyana GPIO ɗin da ya dace daidai;

 

c. Babu hoto ko wani abu mara kyau a cikin hoton;

Shigar da umarnin da ke gefen ISP don duba ko akwai kuskure a cikin watsa mipi.

Ana iya auna siginar mipi da oscilloscope.

Ɗauki hoton da ba a san shi ba don ganin ko akwai wani rashin daidaituwa. Idan akwai rashin daidaituwa a cikin hoton da ba a san shi ba, gabaɗaya matsala ce da saitin firikwensin. Tambayi wani daga masana'antar firikwensin ta asali ya duba shi.

Bayan ƙara yawan riba, akwai layukan tsaye (wanda kuma ake kira FPN), waɗanda ke da alaƙa da na'urar firikwensin, kuma gabaɗaya suna nemo masana'antar firikwensin ta asali don magancewa;