Ov2640 set black and white and then set brightness.

[wdouglas1999]

When I set the OV2640 to black and white it works. When i set the brightness it works. The issue is when I try to set them together the brightness works but the image is not black and white. Any way to fix this?

[UCTRONICS]

@wdouglas1999 Hi, You should check 2640 register configuration information. Maybe it exist conflict.

Regards,

[Dzandaa]

I have the same problem with Brightness, Contrast, Saturation, etc... The last command reset the other.

[mosazahany]

Strange problems in adjusting the saturationand the brightness in ov2640 These bugs do not actually exist and are a problem of the available documents When you execute the following commands set_brightness(s,2); set_contrast(s,2); set_brightness(s,2); The last command is always active and the previous commands are canceled. To solve this problem, you must activate the desired effect and this is done with the following command

Run the following command at the end of all settings.

unsigned char enable_effect= 1(saturation and hue enable)+ 2(aditional saturation enable)+ 4(brighnes and contrast enable)+ 8(spital effect1 enable green -> blue)+ 16(spital effect1 enable gray -> read)+ 32(remove (UV) in YUV color system)+ 64(enable negative effect)+ 128(remove (Y) in YUV color system) ; write_SCCB(0xff, 0x00); write_SCCB(0x7c, 0x00); write_SCCB(0x7d,enable_effect);

command write_SCCB(0x7c, ADRESS); Preparing the address for data injection

ofter that use The following command to inject data write_SCCB(0x7d,byte_0); write_SCCB(0x7d,byte_1); write_SCCB(0x7d,byte_2); . . .

The memory structure is as follows byte_0 =enable_effect byte_0->bit0 =saturation and hue byte_0->bit1 =saturation enable byte_0->bit2 =brighnes and contrast enable byte_0->bit3 =green -> blue spitial effect (Antique and blunish and greenish and readdish and b&w) enable byte_0->bit4 =gray -> read spitial effect (Antique and blunish and greenish and readdish and b&w) enable byte_0->bit5 =remove (UV) in YUV color system byte_0->bit6 =negative enable byte_0->bit7 =remove (Y) in YUV color system byte_1 =saturation1 0-255 byte_2 =hue 0-255 byte_3 =saturation2 0-255 byte_4 =reenter saturation2 in documents byte_5 =spital effect green -> blue 0-255 byte_6 =spital effect gray -> read 0-255 byte_7 =contrast uper eadge 0-255 byte_8 =contrast lower eadge 0-255 byte_9 =brighnes 0-255 byte_10= if byte_10==4 contrast effective

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