<![CDATA[[M5Tab5] How to de-init the GT911 touch panel?]]>I'm creating a firmware manager project (which loads bin firmwares from the SD card and runs them on the device), for the Tab5 with ESP-IDF v5.4.1 and LVGL. I have finished the firmware flashing functions (through ESP32's built-in OTA functions) but now I met a problem with the Tab5's GT911 touch panel.
Since the Launcher shall reboot the system after loading a firmware (to boot into the firmware), I simply called esp_restart() to reboot the ESP32.
But after the ESP32 reboots, the touch panel isn't working (the screen shows the UI though). The touch panel works if I manually rebooted the device with the power button. I think that's a problem with the GT911 touch driver not being correctly de-initialized, but I didn't find any functions to de-init the touch panel.
Are there any ways to de-init the GT911 touch driver, or any ways to make sure the firmware, after a software reboot, can have access to the touch panel?
Since this is a firmware manager project, I can't modify the user's custom firmware, so any methods that involves changing the user's firmware won't work for me.
My project's repo is at: https://github.com/ImLunchtime/Tab5_Launcher

]]>https://community.m5stack.com/topic/7722/m5tab5-how-to-de-init-the-gt911-touch-panelRSS for NodeWed, 29 Apr 2026 11:30:07 GMTWed, 30 Jul 2025 08:32:40 GMT60<![CDATA[Reply to [M5Tab5] How to de-init the GT911 touch panel? on Wed, 30 Jul 2025 09:00:03 GMT]]>Problem already fixed with only two lines of code:

esp_sleep_enable_timer_wakeup(50000); // 50ms
esp_deep_sleep_start();

A very short deep sleep will power off the GT911 chip and power it on again, so that fixes the problem.
Thanks to the chatbot!

]]>https://community.m5stack.com/post/29660https://community.m5stack.com/post/29660Wed, 30 Jul 2025 09:00:03 GMT