Module st7789 

Sitronix ST7789 TFT controller (4-wire SPI, RGB565).

Small ST7789 panels expose only a window of the controller’s 240×320 frame memory, so every panel has a native size, a memory offset and a rotation-dependent MADCTL. Panel captures that once, and Panel::geometry derives the window for any Rotation at compile time.

The driver streams pixel bytes as given. It does no conversion and keeps no buffer, so a framebuffer that already stores big-endian RGB565 can be sent with zero copies (and, on ESP32 targets, straight from RAM via DMA).

Modules

cmd

Command opcodes used by the driver.

madctl

MADCTL bits.

Structs

Geometry

The drawable window for one panel + rotation.

InitStep

One step of a controller initialisation script.

Panel

How a physical panel sits inside the controller’s frame memory.

St7789

ST7789 driver.

Enums

Error

Driver error: either the SPI device or the DC pin failed.

Rotation

Screen rotation, clockwise from the panel’s native portrait orientation.

Constants

M5_ST7789V2_INIT

Power, voltage and gamma settings for the ST7789V2 panels M5Stack ships (Cardputer, StickC Plus family). Values are from M5GFX’s Panel_ST7789 (MIT, © M5Stack); porch and frame-rate registers are left at reset defaults, as M5GFX does, because they differ between panel lots.

Functions

hard_reset

Pulses a hardware reset line (active low) and waits for the controller.