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Re: Going to look into the touch sensor input on the NXP FRDM boards

Jan Van Winkel <jan.van_winkel@...>
 

Hi Lars,

I only played with the idea to integrate a touch controller but had no time yet to start on it.
On the location of the driver I have the feeling that a new, input device, API would  be more suitable then reusing the sensor framework.

Regards,
Jan

On Wed, Aug 1, 2018 at 5:22 PM Lars Knudsen <larsgk@...> wrote:
Hi,

I am planning to do support for the TSI on the Freescale/NXP FRDM boards and was wondering if work already has been done in the area.

I found https://github.com/zephyrproject-rtos/zephyr/blob/master/ext/hal/nxp/mcux/drivers/kinetis/fsl_tsi_v4.h but didn't see any tie to existing code, e.g. for the FRDM-KL25Z 

Did anyone do anything in the area?  If not, I'd like to do it as a sensor driver, but have a few questions:

1. as this is driven by the mcu and the implementation is very specific to the board(s), will it still fit under /drivers/sensor ?

2. mapping the 1D 'distance'/position on the touch slider to a sensor channel, the closest is SENSOR_CHAN_DISTANCE, which (by comment) fits a different purpose.  Might it make sense to introduce XYZ enums for position/distance here:

br
Lars
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