Gt911 Register Map _verified_ Online

Read the byte array starting at 0x8047 through 0x8100 to analyze your hardware's default configurations. Step 3: Write New Settings (If Needed)

Each touch point uses (TrackID + coordinates + size)

Configures touch orientations, reversing X/Y axes, or swapping X and Y axes to match display rotations. 0x8056 (Interrupt Trigger Mode): 0x00 : Rising edge trigger 0x01 : Falling edge trigger 0x02 : Low-level trigger 0x03 : High-level trigger The Checksum and Update Flag gt911 register map

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

bit7 indicates if data is ready to be read; lower bits show the number of touch points. Point 1 X-Low Read the byte array starting at 0x8047 through

Contains real-time touch information (x/y coordinates, touch IDs). Key Register Address Ranges 0x8047 – 0x80FF : Configuration Region (Read/Write) 0x8100 – 0x813F : Coordinate Data Region (Read Only) 0x8140 – 0x814E : Product ID and Information (Read Only) 2. Detailed Breakdown of Key Registers

int gt911_read_touches(gt911_touch_t *touches, int max_touches) uint8_t status = i2c_read_u8(GT911_ADDR, GT911_STATUS); The register map is divided into functional blocks

After writing a new configuration block to 0x8040 – 0x80FD , you must:

The GT911 categorizes its 16-bit register addresses into four distinct functional zones. Memory addresses are transmitted with the Most Significant Byte (MSB) first during I2C transactions. Address Range Description Configuration Registers Controls resolution, touch thresholds, and hardware pins. 0x8140 – 0x81A7 Coordinate Information

What (Arduino, ESP-IDF, Linux kernel) you are using Your target screen resolution and interface