Xilinx IP Ethernet AVB Endpoint v2.4 UG492 - Manual (Page 86)

86 www.xilinx.com Ethernet AVB Endpoint User Guide
UG492 September 21, 2010
Chapter 9: Precise Timing Protocol Packet Buffers
The “Software Drivers” provided with the core, using the PLB and dedicated interrupt,
will use this interface to decode, and then act on, the received PTP packet information.
X-Ref Target - Figure 9-2
Figure 9-2: Rx PTP Packet Buffer
Rx PTP Packet Buffers
Buffer Number Buffer Base Address
0
1
2
3
4
5
6
7
0x0000
0x0100
0x0200
0x0300
0x0400
0x0500
0x0600
0x0700
Single Rx PTP Packet Buffer
Address (+ Buffer Base Address)
byte-wide data
0xFF
0xFE
0xFD
0xFC
0x00
frame size
PTP Frame Data
unused
timestamp[7:0]
timestamp[15:8]
timestamp[23:16]
timestamp[31:24]
0x0800
0x0900
0x0A00
0x0B00
0x0C00
0x0D00
0x0E00
0x0F00
8
9
10
11
12
13
14
15