TDA4VM: Add I2C register mask support in I2C script in PSDKR

Keelung Yang

Part Number: TDA4VM

Hi,

We're usiing PSDKR v7.2 and adding new sensor drivers.

Sometime only some bits in register need to updated. and some datasheets require no modifying reserved bits in registers.

But there is no mask field both in

I2cParams, defined in imaging/sensor_drv/include/iss_sensors.h

and Board_I2cRegProgObj, defined in pdk_jacinto_07_01_05_14/packages/ti/board/src/devices/common/common.h

So it's very convenient and helpfull if mask supported in I2C script APIs.

over 3 years ago

0 Brijesh Jadav over 3 years ago

TI__Guru**** 475965 points

Hi Keelung Yang,

This needs to be taken care in the specific driver. The top level sensor layer is generic layer, so it cannot support this feature.

Regards,

Brijesh

0 Keelung Yang over 3 years ago in reply to Brijesh Jadav

Expert 1786 points

Hi Brijesh,

I don't think it's should be taken care in the specific driver, since mask is just in bit logistic and independent of hardware.

So there is no need to implement it in driver level.

0 Brijesh Jadav over 3 years ago in reply to Keelung Yang

TI__Guru**** 475965 points

Hi Keelung Yang,

What is the mask? Could you give some more information?

Typically in I2C, entire register would get updated. I really doubt that we can set field in the register in I2C.

Regards,

Brijesh

0 Keelung Yang over 3 years ago in reply to Brijesh Jadav

Expert 1786 points

Hi Brijesh,

You need to read it and apply user defined mask, and then write it back.

0 Keelung Yang over 3 years ago in reply to Brijesh Jadav

Expert 1786 points

Like this I2cMaskedParams, I copied and modiied from I2cParams.
And BTW, nRegValue's comment is not correct. this issue existed at least in PSDKR v7.2 ~ 8.0

0 Brijesh Jadav over 3 years ago in reply to Keelung Yang

TI__Guru**** 475965 points

Hi Keelung Yang,

Currently there is no plan to use this structure to do read, modify and write operation, using this structure.

Regards,

Brijesh

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TDA4VM: Add I2C register mask support in I2C script in PSDKR