Layer Registers - Layer Registers - 5.2 English

Layer Registers - Layer Registers - 5.2 English - PG243

Video Mixer LogiCORE IP Product Guide (PG243)

Document ID

PG243

Release Date

2024-01-02

Version

5.2 English

Table: Layer Registers provides a detailed description of all the registers that apply to layers 0 through 16. Overlay layer 1 registers start at base address 0x0200, overlay layer 2 registers start at base address 0x300, and so forth.

Mixer IP has one primary layer, which we mention as layer0. It supports up to 16 overlay layers (Layer 1 to Layer 16). Layer 0 does not have any register for programming. For all overlay layers (Layer 1 to Layer 16) the registers are at identical offsets. Layer 1 registers start at base address 0x200, Layer 2 registers start at base address 0x300 and so forth. Layer 16 registers start at base address 0x1100. In this section, the register description number represents a number from 2 to 11.

Table 2-12: Layer Registers
Address (hex) BASEADDR+	Register Name	Access Type	Description
0x0200	Layer 1 Alpha	R/W	Alpha blending value for layer 1 ranging from 0 = Fully transparent 256 = Fully opaque
0x0208	Layer 1 Start X	R/W	X position of the top left corner of layer 1, relative to the background layer.
0x0210	Layer 1 Start Y	R/W	Y position of the top left corner of layer 1, relative to the background layer
0x0218	Layer 1 Width	R/W	Active width (in pixels) of layer 1.
0x0220	Layer 1 Stride	R/W	Active stride (in bytes) of layer 1.
0x0228	Layer 1 Height	R/W	Active height (in lines) of layer 1.
0x0230	Layer 1 Scale Factor	R/W	Scale factor for layer 1 ranging from 0 = No scaling 1 = 2x scaling (horizontally and vertically) 2 = 4x scaling (horizontally and vertically)
0x0240	Layer 1 Plane 1 Buffer	R/W	Start address of plane 1 of frame buffer for layer 1. Only valid in case layer 1 is a memory layer.
0x024C	Layer 1 Plane 2 Buffer	R/W	Start address of plane 2 of frame buffer for layer 1. Only valid in case layer 1 is a memory layer and a semi-planar video format is selected.