Search found 360 matches

by CousinItt
Tue Feb 27, 2024 7:04 pm
Forum: Development Tools and Programming
Topic: Sporadic "crosstalk" from I2C into TDM mic input when ports and SW on the same slice or connector
Replies: 3
Views: 1593

Re: Sporadic "crosstalk" from I2C into TDM mic input when ports and SW on the same slice or connector

Once more than five cores in a tile are busy then they are allocated less time, so that might be responsible. Alternatively you might really have some interference (or both!). You could distinguish between them by adding a task that uses processor time but does not have any side effects that could g...
by CousinItt
Fri Feb 23, 2024 8:33 pm
Forum: Development Tools and Programming
Topic: how to trigger an event/select on buffered port output ?
Replies: 3
Views: 1898

Re: how to trigger an event/select on buffered port output ?

Could you use xC to handle the timestamp directly on the output? I don't know if it would be a bit more efficient, but probably more readable.

See section 6.8 in the XMOS programming guide.
by CousinItt
Thu Jan 25, 2024 4:58 pm
Forum: xcore.ai Evaluation Kit
Topic: SPI Flash Partition Table
Replies: 5
Views: 3774

Re: SPI Flash Partition Table

I would have thought the partitions are packed, so the position of each one (apart from the first) is variable depending on the partition size. Can you inspect the fl_BootImageInfo structure to determine how big a partition is? It would then be just a matter of adding on the size of each partition t...
by CousinItt
Thu Jan 25, 2024 2:26 pm
Forum: Development Tools and Programming
Topic: Technical Guide to C for xcore - new YouTube tutorial
Replies: 7
Views: 4568

Re: Technical Guide to C for xcore - new YouTube tutorial

True enough Ross - I hadn't realised but the YouTube channel has the same video from Sept 21. Apologies if I misled anyone. I agree with fabriceo: interfaces are still a blind spot in the new C-style development path. Many of the existing libraries use interfaces and it's still not clear (to me anyw...
by CousinItt
Wed Jan 17, 2024 12:20 pm
Forum: Development Tools and Programming
Topic: Dual issue mode / 64 bit memory alignment
Replies: 4
Views: 7122

Re: Dual issue mode / 64 bit memory alignment

1) There are some threads here on the forum claiming that for dual issue mode, the memory of arrays and structs must be aligned to 64 bit otherwise some unpredictable things happen. Is this really true? I have not found this restriction anywhere in the official XMOS documents, yet. And I think it w...
by CousinItt
Sat Jan 06, 2024 4:53 pm
Forum: Other XMOS Development Kits
Topic: XTAG4 as a cheap devboard or add-on
Replies: 2
Views: 114006

Re: XTAG4 as a cheap devboard or add-on

Good luck and keep us posted