Camera board • IMX219 - Setting black level adjust

I'm taking RAW8 images with the IMX219 sensor and the darkest values are usually 16. According to the datasheet (https://www.opensourceinstruments.com/E ... X219PQ.pdf), the "average value of the black level is adjusted to 64d", and for RAW8, this is divided by 4, i.e. 16.

I want to change this value to 0 (i.e. no pedestal), and apparently there are registers (0xD1EA and 0xD1EB, RW) that can be set. However, I've tried setting them in my custom driver but the darkest values are still mainly 16. There were no errors when setting the registers, but I didn't get what I want either (lowest value 0).

These registers are not in the Raspberry Pi drivers, and the only resource that I've found that references these registers is https://qiita.com/kan573/items/5634fe3b2287b41da534 and I'm not even sure if it worked for this person.

According to the datasheet, "manufacturer specific registers" are in 0x3000 - 0x5FFF, and to access these, there's a special command sequence. However, these obviously don't include 0xD1EA/B, and there's no indication how they could be accessed.

Has anyone tried setting these registers successfully?

Statistics: Posted by darrenfoong — Sun Jul 07, 2024 8:34 am — Replies 0 — Views 10

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