Gt911 Register Map !!top!! -

The datasheet says, "Calculate the checksum of bytes 0x8047 to 0x80FD, then store the low byte at 0x80FE." Fine. But then you write 0x01 to 0x80FF... and the GT911 throws a tantrum if your checksum is wrong. It will simply ignore your config and revert to its internal "dumb" defaults. I spent two hours debugging why my X/Y axes were swapped until I realized I had a classic off-by-one in my checksum loop. The GT911 does not forgive. It does not forget.

is a high-performance 5-point capacitive touch controller commonly used in tablets and embedded systems. It utilizes an gt911 register map

Only the lower 12 bits are valid. The upper 4 bits of the high byte are reserved or used for flags. The datasheet says, "Calculate the checksum of bytes

during startup to verify you are talking to the correct hardware before applying configurations. ESD Protection: Regularly write and check the value at register if your device operates in high-interference environments. 3. Register Map It will simply ignore your config and revert

Monitor the INT pin or poll the Status Register (0x814E) until Bit 7 becomes 1 .