i.MX ProcessorsのトピックRe: Change OV5640 Register Using I2C

Change OV5640 Register Using I2C

giritharanr — Wed, 23 Mar 2016 07:39:25 GMT

Hi ,

I am new to this,please help me to solve my issue,

I want to change some register values of ov5640.c driver file from user space c API.

I tried this link( https://www.kernel.org/doc/Documentation/i2c/dev-interface ) .But in this c program i can't change my register value..Here i attach my i2c code.please kindly gothrough it.

Thanks in Advance!.

With REGARDS,

R.Giritharan

Original Attachment has been moved to: i2c_ov5640.c.zip

Re: Change OV5640 Register Using I2C

igorpadykov — Wed, 23 Mar 2016 10:31:43 GMT

Hi Giritharan

I think it is necessary to use platform specific i2c api as used

for example in unit tests (refer to attached part of it,

I2C Test With mt9v111 camera mxc_i2c_test.c), sources

can be found

http://downloads.yoctoproject.org/mirror/sources/imx-test-5.2.tar.gz

Best regards

igor

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Re: Change OV5640 Register Using I2C

giritharanr — Wed, 23 Mar 2016 10:46:59 GMT

Hi igor,

Thanks for your reply.

i saw the source code which you attach.

my doubt is , for example i want to change the register 0x5000 value from 0x06 to 0xff from user space...so as per my attached code if i give the reg value of 0x5000 means it won't taken.i don't know why?

so register is not written properly.

please find any solution to over write the register values at run time.

Thanks in advance!

With Regards,

R.Giritharan

Re: Change OV5640 Register Using I2C

jimmychan — Thu, 24 Mar 2016 08:00:56 GMT

One suggestion:

You can read the ioctl part in driver source code ov5640.c. You can modify/add one ioctl function and then call that ioctl for changing the register value in user space.