#PinePhone Touch Panel is undocumented ... So we decipher the official Android driver

Article: https://lupyuen.github.io/articles/touch2?2#goodix-gt917s-touch-panel

Let's read the Product ID from #PinePhone Touch Panel over I2C

Article: https://lupyuen.github.io/articles/touch2?3#read-the-product-id

Let's poll #PinePhone Touch Panel for Touch Data ... Before we switch to #NuttX Interrupts

Article: https://lupyuen.github.io/articles/touch2?4#poll-the-touch-panel

Here's how we read a Touch Point from #PinePhone Touch Panel

Article: https://lupyuen.github.io/articles/touch2?5#read-a-touch-point

How we attach a #NuttX Interrupt Handler to #PinePhone Touch Panel

Article: https://lupyuen.github.io/articles/touch2?6#attach-our-interrupt-handler

#PinePhone Touch Panel fires too many Interrupts! We need to throttle them

Article: https://lupyuen.github.io/articles/touch2?6#attach-our-interrupt-handler

Let's throttle the Interrupts from #PinePhone Touch Panel ... So #NuttX RTOS doesn't get overwhelmed

Article: https://lupyuen.github.io/articles/touch2?7#handle-interrupts-from-touch-panel

Simple test of our Interrupt Handler for #PinePhone Touch Panel ... On Apache #NuttX RTOS

Article: https://lupyuen.github.io/articles/touch2?8#test-our-interrupt-handler

We create a #NuttX Kernel Driver for #PinePhone Touch Panel

Article: https://lupyuen.github.io/articles/touch2?9#nuttx-touch-panel-driver

We register our #NuttX Driver for #PinePhone Touch Panel at "/dev/input0"

Article: https://lupyuen.github.io/articles/touch2?10#register-touch-panel-driver

Reading a Touch Sample from our #NuttX Driver for #PinePhone Touch Panel

Article: https://lupyuen.github.io/articles/touch2?11#read-a-touch-sample

Here's how we configure #LVGL on #PinePhone for Apache #NuttX RTOS ... Don't forget lv_port_tick!

Article: https://lupyuen.github.io/articles/touch2?12#lvgl-calls-our-driver

How #LVGL calls our #NuttX Driver to read #PinePhone's Touch Panel

Article: https://lupyuen.github.io/articles/touch2?15#lvgl-calls-our-driver

Creating our own #LVGL Touchscreen Apps for #PinePhone and Apache #NuttX RTOS

Article: https://lupyuen.github.io/articles/touch2?15#lvgl-calls-our-driver

Our #NuttX Driver for #PinePhone Touch Panel has these Limitations

Article: https://lupyuen.github.io/articles/touch2?16#driver-limitations

Everything we know about the Capacitive Touch Panel inside #PinePhone @PINE64 ... And how we created the driver for Apache #NuttX RTOS

https://lupyuen.github.io/articles/touch2

@lupyuen hello, thanks for all this doc!
Do you have an idea why the touchpanel is always generating an interrupt? It defeats interput purpose...

@oliv Thanks! Yep the non-stop interrupts is a total mystery to me too.

PinePhone's Touch Panel isn't documented, so we need to decipher the official Android Driver to see it can fix the interrupts...

https://github.com/goodix/gt9xx_driver_android/blob/master/gt9xx.c