PARK_PTR_REG (Park Pointer Register – Offset 28h) - 6.3 English

AXI Video Direct Memory Access v6.3 Product Guide (PG020)

Document ID: PG020
Release Date: 2022-06-08
Version: 6.3 English

This register provides Park Pointer registers for the Memory Map to Stream and Stream to Memory Map VDMA transfer Management.

Figure 2-7: PARK_PTR_REG Register
X-Ref Target - Figure 2-7

Table 2-9: PARK_PTR_REG Register Details
Bits	Field Name	Default Value	Access Type	Description
31–29	Reserved	0h	RO	Writing to these bits has no effect, and they are always read as zeros.
28–24	WrFrmStore	0h	RO	Write Frame Store number. Indicates current frame number being operated on by the S2MM channel. During VDMA operations this value continually updates as each frame is processed. During error conditions, the value is updated with the frame number being operated on when the error occurred. It will again start tracking the current frame number when all errors are cleared.
23–21	Reserved	0h	RO	Writing to these bits has no effect, and they are always read as zeros.
20–16	RdFrmStore	0h	RO	Read Frame Store number. Indicates the frame number being operated on by the MM2S channel. During VDMA operations this value continually updates as each frame is processed. During error conditions, the value is updated with the frame number being operated on when the error occurred. It will again start tracking the current frame number when all errors are cleared.
15–13	Reserved	0h	RO	Writing to these bits has no effect, and they are always read as zeros.
12–8	WrFrmPtrRef	0h	R/W	Write Frame Pointer Reference. When Parked (S2MM_VDMACR.Circular_Park = 0), S2MM channel parks on the buffer referenced by this frame number.
7–5	Reserved	0h	RO	Writing to these bits has no effect, and they are always read as zeros.
4–0	RdFrmPtrRef	0h	R/W	Read Frame Pointer Reference. When Parked (MM2S_VDMACR.Circular_Park = 0) the MM2S channel parks on the buffer referenced by this frame number.