Example of slide down, left, up, right, and a long press using gpio_dt_spec and GPIO_DT_SPEC_GET_OR with CST816S

[lcj]

I'm trying to get touch working on a PineTime_DevKit0 board using a CST816S touch device, but I don't see a good example for it using 

GPIO_DT_SPEC_GET_OR.

const struct gpio_dt_spec touch_spec = GPIO_DT_SPEC_GET_OR(DT_ALIAS(touch), gpios, {0});
static struct gpio_callback touch_cb;

I would like to capture:

Slide Down

Slide Left

Slide Up

Slide Right

Long Press

[Menon]

Hello,
I am sorry, but we are short staffed this week due to Public Holidays in Norway. We will be back on Monday 22nd and hope to be able to answer all incoming requests within a couple of days, depending on the backlog. I am sorry for the inconvenience.

 

Best regards,
Abhijith

[lcj]

No problems, Abhijith. Thank you.

[Menon]

Hello,

Sorry for the long response time. You can refer to Button sample inside the nRF connect SDK. You can find the same sample under ncs\v2.x.x\zephyr\samples\basic\button.

There is a blog from Nordic, written for Capacitive Touch on the nRF52 series which might be useful for you but please see that it's based on our old nRF5 SDK.

Kind Regards,

Abhijith

[khelmutlord]

The CST816S touch device you mentioned is actually an I2C device. There is in-tree Zephyr support for this device and it is accessible using the "kscan" driver: https://docs.zephyrproject.org/3.2.0/hardware/peripherals/kscan.html

There is an existing kscan example for touchscreens. This does not specifically use the CST part but should be a good starting point:

github.com/.../kscan_touch