EpdByte()

Syntax

EpdByte(wColumn As Word, wRow As Word, bData As Byte, bPlane As Byte)

Parameters

wColumn — X-position, byte-aligned (i.e. wColumn addresses a full 8-pixel-wide byte, not an individual pixel column)

wRow — Y-position, pixel-aligned

bData — Byte to write

bPlane — Which GRAM plane to write to (EPD_Plane_BW/EPD_Plane_OLD or EPD_Plane_RY/EPD_Plane_NEW)

Sends a byte to the given position in the corresponding driver IC GRAM plane.

This is the smallest unit of data (8 pixels/bits) that the driver GRAM actually accepts — every write to the display, whether from a frame buffer or built pixel-by-pixel via EpdPixel(), ultimately comes down to a sequence of EpdByte() calls like this one.
It's the true low-level primitive this whole library's EPD output is built on.

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