Gt911 Register Map !free!

Mastering the GT911 Touch Controller: A Complete Guide to the Register Map

The GT911 is one of the most popular capacitive touch panel controllers in the embedded world. Found in everything from Raspberry Pi touchscreens and DIY handheld gaming consoles to industrial HMIs and automotive displays, its popularity stems from its robust noise immunity, support for up to 5 simultaneous touches, and low cost. However, for engineers and hobbyists alike, the true power of the GT911 lies hidden within its register map.

Spurious Touches / Ghost Touches

This is almost always a threshold (0x8105) issue. If set too low (e.g., <30), environmental noise triggers false touches. Increase to 120 and test. gt911 register map

// Read number of touch points
uint8_t touch_count = 0;
i2c_read(0x5D, 0x8101, &touch_count, 1);

0x5D (default, with INT pin pulled high during reset)
0x14 (alternative)

: The master sends the device address (write bit), followed by a 16-bit register address and then the data bytes. Read Operation Mastering the GT911 Touch Controller: A Complete Guide