<![CDATA[[Tab5] How to de-init the 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/7723/tab5-how-to-de-init-the-touch-panelRSS for NodeWed, 29 Apr 2026 11:29:57 GMTWed, 30 Jul 2025 08:37:03 GMT60<![CDATA[Reply to [Tab5] How to de-init the touch panel? on Wed, 30 Jul 2025 08:52:04 GMT]]>@ImLunchtime 有建议欢迎多提~

]]>https://community.m5stack.com/post/29659https://community.m5stack.com/post/29659Wed, 30 Jul 2025 08:52:04 GMT<![CDATA[Reply to [Tab5] How to de-init the touch panel? on Wed, 30 Jul 2025 08:51:27 GMT]]>@yuyun2000 chatbot还是有点用的 这是它的回复里最后一个方法（也是唯一一个能用的）

]]>https://community.m5stack.com/post/29658https://community.m5stack.com/post/29658Wed, 30 Jul 2025 08:51:27 GMT<![CDATA[Reply to [Tab5] How to de-init the touch panel? on Wed, 30 Jul 2025 08:50:41 GMT]]>Yes, the GT911 chip only needs to be turned off and then on again.

]]>https://community.m5stack.com/post/29657https://community.m5stack.com/post/29657Wed, 30 Jul 2025 08:50:41 GMT<![CDATA[Reply to [Tab5] How to de-init the touch panel? on Wed, 30 Jul 2025 08:50:28 GMT]]>@ImLunchtime chatbot是否解决了你的问题？ 他的回复有什么帮助？

]]>https://community.m5stack.com/post/29656https://community.m5stack.com/post/29656Wed, 30 Jul 2025 08:50:28 GMT<![CDATA[Reply to [Tab5] How to de-init the touch panel? on Wed, 30 Jul 2025 08:50:00 GMT]]>Problem fixed with just two lines of code:

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

I used this to replace esp_restart() and it worked. Putting the device to deep-sleep makes use of the PMS150G chip and basically turned the device off and then on again, so actually there is a way to let the device force a full reboot on itself.

]]>https://community.m5stack.com/post/29655https://community.m5stack.com/post/29655Wed, 30 Jul 2025 08:50:00 GMT