Yadda za a BringupaSensor?

1. Fage

Gabaɗaya, idan muka cire tasirin firikwensin, da farko muna buƙatar haskaka shi, wanda kuma ake kira Sensor bringup.Wannan bangare na aikin injiniyan direba ne ya fi yin shi, amma wani lokacin ma sai an yi shi da injin gyara.

Amma a zahiri, idan yana tafiya da kyau, bayan daidaita saitunan firikwensin, adireshin i2c, da Sensor chip_id a cikin direban firikwensin, za a iya samar da hoton, amma a mafi yawan lokuta, sau da yawa ba ya da santsi, kuma za a iya fuskantar matsaloli da yawa. .

 

2. Tsarin kawowa Sensor

Aiwatar zuwa masana'antar firikwensin don ƙayyadaddun da ake buƙata na saitin Sensor, gami da ƙuduri, Mclk, ƙimar firam, ɗan faɗin ɗanyen hoton fitarwa, 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, fara saita saitin firikwensin, adireshin I2C, chip_id;

Sami zane mai tsari na motherboard, tabbatar da tsarin da ke da alaƙa da kayan masarufi, kuma saita ikon sarrafa fil na mclk, sake saiti, pwrdn, i2c a cikin dts bisa ga zane-zane na motherboard;

Bayan an kammala matakan da ke sama, idan babu matsala tare da kayan aikin, zaku iya haskaka hoton, sannan ku tsara lokacin bayyanar firikwensin, riba analog da sauran rajista dalla-dalla bisa ga takaddar bayanan firikwensin;

 

3. Matsala ta taƙaita

a.Yadda za a ƙayyade fil na sake saiti, pwrdn, i2c, mclk?

Da farko, dole ne ku koyi karanta zane-zane.Na rikice sosai lokacin da na sami zane a farkon.Na ji cewa abubuwa sun yi yawa a cikin rikici.Ban san ta ina zan fara ba.A gaskiya, babu wurare da yawa da za a kula da su.Bana buƙatar fahimtar duka zanen.

Domin mun fi daidaita kyamarar, nemo ɓangaren MIPI_CSI, kamar yadda aka nuna a cikin Hoto a, kuma kawai mayar da hankali kan ma'aunin sarrafawa na CM_RST_L (sake saitin), CM_PWRDN (pwrdn), CM_I2C_SCL (i2c_clk), CM_I2C_SDA (i2c_data ), da (CMK_M) mclk) zuwa

 

b.I2C ya kasa?

An tsara adireshin i2c ba daidai ba: Gabaɗaya, i2c yana da adireshi biyu, kuma matakin ya bambanta idan an ja ko ƙasa.

Bincika matsalar samar da wutar lantarki ta hardware AVDD, DVDD, IOVDD, wutar lantarki guda uku na wasu na'urori suna samar da wutar lantarki akai-akai, kuma wasu kayan wuta guda uku ana sarrafa su ta hanyar software.Idan software ce ke sarrafa ta, kuna buƙatar ƙara waɗannan kayan wuta guda uku zuwa fil ɗin sarrafa direba.

Tsarin mclk fil ba daidai ba ne: kuna iya amfani da oscilloscope don auna ko agogon da aka bayar ga firikwensin yana samuwa, ko kuma agogon daidai yake, kamar: 24MHz, 27MHz.

Ba daidai ba saitin fil na i2c: Gabaɗaya, zaku iya bincika fayil ɗin pinmux-pins daidai na babban iko don tabbatar da ko an ayyana GPIO daidai daidai;

 

c.Babu hoto ko rashin daidaituwa a hoto;

Shigar da umarni a gefen ISP don bincika ko akwai kuskure a cikin watsa mipi.

Ana iya auna siginar mipi tare da oscilloscope.

Ɗauki ɗanyen hoton don ganin ko akwai wani rashin daidaituwa.Idan akwai rashin daidaituwa a cikin ɗanyen hoto, gabaɗaya matsala ce tare da saitin firikwensin.Tambayi wani daga asalin masana'antar firikwensin ya duba ta.

Bayan karuwar riba, akwai ratsi a tsaye (wanda ake kira FPN), waɗanda ke da alaƙa da firikwensin, kuma gabaɗaya nemo masana'antar firikwensin asali don magance;