Xilinx IP Ethernet AVB Endpoint v2.4 UG492 Manual de usuario Pagina 33
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Ethernet AVB Endpoint User Guide www.xilinx.com 33
UG492 September 21, 2010
Typical Implementation
Figure 3-2 illustrates that the Ethernet AVB Endpoint core supports the two main types of
data interfaces at the client side:
1. The AV traffic interface is intended for the Quality of Service audio/video data.
Illustrated are a number of audio/video sources (for example, a DVD player), and a
number of audio/video sinks (for example, a TV set). The Ethernet AVB Endpoint
gives priority to the AV traffic interface over the legacy traffic interface, as dictated by
IEEE P802.1Qav 75% bandwidth restrictions.
2. The legacy traffic interface is maintained for best effort ethernet data: Ethernet as we
know it today (for example, the PC surfing the internet in Figure 3-1). Wherever
possible, priority is given to the AV traffic interface (as dictated by IEEE P802.1Qav
bandwidth restrictions) but a minimum of 25% of the total Ethernet bandwidth is
always available for legacy ethernet applications.
The AV traffic interface in Figure 3-2 is shown as interfacing to a 1722 Packet Manager
block. The IEEE1722 is also an evolving standard which will specify the embedding of
audio/video data streams into Ethernet Packets. The 1722 headers within these packets
can optionally include presentation time stamp information. Contact Xilinx for further
system-level information.
- LogiCORE 1
- Ethernet AVB 1
- Endpoint v2.4 1
- Revision History 2
- Table of Contents 3
- Chapter 5: Core Architecture 4
- Chapter 13: Software Drivers 6
- Kit (EDK) 7
- Schedule of Figures 9
- UG492 September 21, 2010 10
- Schedule of Tables 13
- About This Guide 17
- Conventions 18
- Online Document 19
- List of Abbreviations 20
- Preface: About This Guide 22
- Recommended Design Experience 24
- Additional Core Resources 24
- Technical Support 24
- Feedback 24
- Document 25
- Chapter 1: Introduction 26
- Licensing the Core 27
- Obtaining Your License Key 28
- Installing the License File 28
- Bridging 29
- AVB Specifications 30
- P802.1Qav 31
- Typical Implementation 32
- Component Name 36
- Core Delivery Format 36
- Ethernet AVB GUI Page 2 37
- Output Generation 38
- Core Architecture 39
- EDK pcore Format 41
- Functional Block Description 42
- Tx Arbiter 43
- Rx Splitter 43
- MAC Header Filters 43
- Tx PTP Packet Buffers 44
- Tx Time Stamp 44
- Rx PTP Packet Buffers 44
- Rx Time Stamp 44
- Tri-Mode Ethernet MACs 46
- Core Interfaces 47
- Legacy Traffic Interface 48
- AV Traffic Interface 49
- MAC Transmitter Interface 50
- MAC Receiver Interface 51
- MAC Management Interface 51
- PLB Interface 53
- Chapter 5: Core Architecture 54
- Interrupt Signals 55
- PTP Signals 56
- Chapter 6 57
- Tx AV Traffic I/F 59
- Tx Arbiter Bandwidth Control 63
- Chapter 7 65
- Legacy MAC Header Filters 67
- Match Pattern Register 70
- Match Enable Register 70
- VLAN Priority Match 72
- Any Other Combinations 72
- Rx AV Traffic I/F 73
- Errored AV Traffic Reception 74
- Chapter 8 75
- ,” which 76
- RTC Implementation 77
- (Step 2) Synchronized RTC 78
- Time Stamping Logic 79
- Chapter 9 83
- Rx PTP Packet Buffer 85
- Configuration and Status 87
- Single Write Transaction 89
- Rx Filtering Control Register 93
- RTC Offset Control Registers 94
- Current RTC Value Registers 95
- RTC Interrupt Clear Register 96
- Phase Adjustment Register 97
- MAC Address Filter Registers 100
- MAC MDIO Registers 101
- Constraining the Core 103
- signal: 104
- Required Constraints 107
- "rtc_regs_sample"; 109
- System Integration 111
- Introduction 124
- EDK Tool Domain 125
- Ethernet 125
- MHS File Syntax 127
- AXI_Ethernet Configuration 130
- Software Drivers 131
- Clock Slave 132
- Software System Integration 132
- Core Initialization 134
- Ethernet AVB Endpoint Setup 134
- Quick Start Example Design 137
- Generating the Core 139
- Simulating the Example Design 141
- What’s Next? 142
- Chapter 15 143
- Directory and File Contents 144
- <component name>/doc 145
- Table 15-9: Timing Directory 148
- Implementation Scripts 151
- Simulation Scripts 151
- Example Design 152
- Top-Level Example Design HDL 153
- Ethernet Frame Stimulus 153
- Ethernet Frame Checker 154
- Loopback Module 154
- PLB Module 155
- Demonstration Test Bench 156
- Customizing the Test Bench 157
- X-Ref Target - Figure 15-3C 158
- Development Kit (EDK) 165
- RTC Time Stamp Accuracy 167
- 0 40 80 120 160 200 240RTC 168
- RTC Sampling Error 169
- Sampling 170
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