Search found 279 matches

by Andy
Tue Oct 18, 2016 4:00 pm
Forum: Q&A
Topic: AVB VendorID
Replies: 4
Views: 11853

Re: AVB VendorID

OK slight complication - the Vendor ID part of 1722.1 doesn't exist anymore. The XMOS implementation is out of date in this regard with what was published in the final standard. The ratified standard has a single 64-bit field called the entity_model_id instead of two separate 32-bit fields named ven...
by Andy
Tue Oct 18, 2016 12:19 pm
Forum: Q&A
Topic: AVB VendorID
Replies: 4
Views: 11853

Re: AVB VendorID

Every AVB endpoint contains an unique Entity ID advertised by 1722.1. This ID is an EUI-64 which is usually computed from the the MAC address of the primary network port on your device. See http://standards.ieee.org/develop/regauth/tut/eui64.pdf If you don't already own a block of MAC addresses, you...
by Andy
Wed Sep 28, 2016 4:46 pm
Forum: Other XMOS Development Kits
Topic: xCORE-200 MC Audio AVB (AN00203) @ 100 Mbps
Replies: 4
Views: 6651

Re: xCORE-200 MC Audio AVB (AN00203) @ 100 Mbps

Try tweaking the 100Mb delay values (350 ns) in the PHY driver in main.xc to get approx the same pdelay value as 1G:

Code: Select all

  eth.set_ingress_timestamp_latency(0, LINK_100_MBPS_FULL_DUPLEX, 350);
  eth.set_egress_timestamp_latency(0, LINK_100_MBPS_FULL_DUPLEX, 350);
by Andy
Wed Sep 28, 2016 3:45 pm
Forum: Other XMOS Development Kits
Topic: xCORE-200 MC Audio AVB (AN00203) @ 100 Mbps
Replies: 4
Views: 6651

Re: xCORE-200 MC Audio AVB (AN00203) @ 100 Mbps

What's the output if you enable

#define DEBUG_PRINT_AS_CAPABLE 1

in gptp.xc?
by Andy
Sat Mar 12, 2016 1:17 pm
Forum: Other XMOS Development Kits
Topic: AVB-DC at < 48kHz?
Replies: 4
Views: 5809

Re: AVB-DC at < 48kHz?

OS X currently supports AVB sample rates that are integer multiples of 48 kHz only.
by Andy
Thu Aug 20, 2015 10:49 am
Forum: Q&A
Topic: Error Building Gigabit AVB example
Replies: 5
Views: 6070

Answer 3744

Make sure you're using the latest version v1.0.2 of AN00202.
by Andy
Mon Aug 17, 2015 11:17 am
Forum: Q&A
Topic: Using I2S on xCore-200 Multichannel Audio Platform
Replies: 1
Views: 2364

Answer

Yes, there are through-hole test points on the board labelled LRCLK and SCLK.

by Andy
Tue Jul 21, 2015 8:08 pm
Forum: Development Tools and Programming
Topic: Adding ethertype filter disables mac address filters
Replies: 2
Views: 3413

Re: Adding ethertype filter disables mac address filters

Thanks for the feedback Gerry. We will review the documentation and continue to improve it. With regards to code examples, these are typically delivered through application notes on the website: https://www.xmos.com/support/appnotes?subcategory=Networking%20examples AN00120 and AN00199 have been upd...
by Andy
Wed Jul 08, 2015 5:49 pm
Forum: Other Applications
Topic: Question about Gigabit-Ethernet-AVB-endpoint-example
Replies: 4
Views: 5522

Re: Question about Gigabit-Ethernet-AVB-endpoint-example

Yes MCLK stands for master clock. AVB v6 multiplied the master clock frequency by 2 (24.576 *2) to achieve a 48 to 96 kHz sample rate change. A 49.152 MHz master clock isn't supported by lib_i2s so the master clock is now fixed at a constant frequency and the master clock to bit clock ratio is modif...