Map __exclusive__ — Gt911 Register

Introduction

But here is the trap: Register 0x80FE is the Checksum, and 0x80FF is the Refresh Flag. gt911 register map

As Alex sipped his coffee, he began to review the GT911 register map, making sure everything was in order for the new product launch. He checked the configuration registers, ensuring that the chip was set to the correct mode of operation. He then verified the data registers, which stored the touch data collected by the chip. Introduction But here is the trap: Register 0x80FE

return touch_count;

| Byte offset | Field | |-------------|-------| | +0 | Track ID | | +1 | X coordinate (low byte) | | +2 | X coordinate (high byte) | | +3 | Y coordinate (low byte) | | +4 | Y coordinate (high byte) | | +5 | Touch area (size/pressure) | | Byte offset | Field | |-------------|-------| |

// Read the first touch point (7 bytes) uint8_t raw[35]; // Space for up to 5 touches * 7 bytes i2c_read_bytes(GT911_ADDR, GT911_TOUCH1, raw, touch_count * 7);