Cirrus-logic CobraNet User Manual download pdf (Page 5)

CobraNet Programmer’s Reference

Table of Contents

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.1 CobraNet Terminology ........................................................................................................7

1.2 Protocol ...............................................................................................................................9

1.2.1 Beat Packet.........................................................................................................9

1.2.2 Isochronous Data Packet (or Bundle) .................................................................9

1.2.3 Reservation Packet .............................................................................................9

1.2.4 Serial Bridge Packet............................................................................................9

1.3 Timing and Performance...................................................................................................10

1.4 Bundle Addressing types .................................................................................................. 11

2. Control Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.1 Serial Bridge......................................................................................................................12

2.2 Packet Bridge.................................................................................................................... 13

2.2.1 Packet Bridge Buffer Data Format .................................................................... 13

Processor-dependent Layout of Packet Bridge Buffers..............................13

24-bit HMI Packet Bridge Buffer Data Format ............................................14

32-bit HMI Packet Bridge Buffer Data Format ............................................14

2.2.2 Packet Bridge Receive Filtering ........................................................................15

3. Network Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.1 CobraNet Audio.................................................................................................................16

3.2 Serial Bridge......................................................................................................................16

3.3 Packet Bridge.................................................................................................................... 16

3.4 BOOTP..............................................................................................................................16

3.5 RARP (partial support) ......................................................................................................17

3.6 ICMP (partial support) ....................................................................................................... 17

3.7 ARP...................................................................................................................................17

3.8 IP.......................................................................................................................................17

3.9 UDP................................................................................................................................... 18

3.10 TFTP ............................................................................................................................... 18

3.11 SNMP..............................................................................................................................18

4. Audio Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.1 Audio Routing Channels ...................................................................................................19

4.2 Bundle Transmitters ..........................................................................................................20

4.3 Bundle Receivers ..............................................................................................................20

4.4 Loopback...........................................................................................................................20

4.5 Output Channel Duplication .............................................................................................. 20

4.6 Meters ...............................................................................................................................21

4.7 Low-latency Audio Support ............................................................................................... 21

4.8 96 kHz Sample Rate Support............................................................................................ 23

5. Management Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.1 Flash .................................................................................................................................25

5.2 Persistence .......................................................................................................................26

5.3 Watch Dog ........................................................................................................................26

5.4 SNMP Extension Agent.....................................................................................................27

6. Management Interface Variable Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6.1 Legend .............................................................................................................................. 28

6.2 Data Types........................................................................................................................ 29

6.2.1 DisplayString .....................................................................................................29

6.2.2 OID.................................................................................................................... 29

6.2.3 IpAddress ..........................................................................................................29

6.2.4 PhysAddress .....................................................................................................30

6.2.5 TimeTicks..........................................................................................................30

1 2 3 4 5 6 7 8 9 10 ... 146 147

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Cirrus-logic CobraNet User Manual Page 5

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