Commonly 0x5D or 0x14 , depending on how the INT pin is pulled during reset.
uint16_t x_pos = (x_high << 8) | x_low; uint16_t y_pos = (y_high << 8) | y_low; Use code with caution. Step-by-Step Touch Reading Workflow
Often used for soft resets or changing the operating mode (e.g., switching from active sensing to low-power sleep).
Sum all the byte values within the configuration array from 0x8047 to 0x80FE . Take the two's complement of this sum (or mask it: (~sum + 1) & 0xFF ) and write this single byte to register 0x80FF . Set the Config Fresh Flag ( 0x80FE ): Write 0x01 to this register. The gt911 register map
1 means new touch data is ready to be read. 0 means no new data.
Goodix GT911 is a capacitive touch controller that uses an I2C interface to communicate with a host processor. The register map is divided into functional blocks for commands, configuration, and touch data status. I2C Communication Basics Slave Address: usually has two selectable 7-bit I2C addresses, , depending on the state of the pins during startup. Register Address Size: Unlike many simple I2C devices, the 16-bit register addresses Focus LCDs Key Register Map Blocks Address Range (Hex) Description Command Register Used to send real-time commands (e.g., reset, sleep). Configuration Registers
Your configuration resolution registers do not match your actual physical panel orientation. Adjust the "Module Switch 1" register ( 0x804D ) to flip or mirror axes. Commonly 0x5D or 0x14 , depending on how
This volatile workspace updates at frequencies up to 100Hz when human touch alters the local capacitance field. Driving routines rely on this layout to translate field metrics to system mouse/pointer ticks. :
After reading all touch points, always write 0x00 back to 0x8009 . If you fail to do this, the GT911 will stop sending interrupts.
Write 0x00 back to register 0x814F to unlock the buffer for the next scan cycle. Take the two's complement of this sum (or
: Accepts parameters like 0x00 (Read coordinate mode), 0x01 (Sleep mode), and specialized gesture wake values.
Before executing your configuration routine, query the product ID registers to verify stable I2C communication and confirm that the connected hardware is an authentic Go to product viewer dialog for this item.