Search found 22 matches
- Wed Sep 26, 2018 1:45 pm
- Forum: XMOS Devices
- Topic: Memory limitations for instructions per thread
- Replies: 26
- Views: 49223
Re: Memory limitations for instructions per thread
I use the XEF232-1024 and for tile[0] I am utilising 220kB total and more than 60kB in a single thread(size of functions from analysis without data and stack) without a problem. I compile with -O3 and -mno-dual-issue. There does not seem to be memory limitation per core/thread. Basic question but ha...
- Wed Oct 18, 2017 4:02 pm
- Forum: Development Tools and Programming
- Topic: SliceKit x200 boot from SPI Slave
- Replies: 4
- Views: 4834
Re: SliceKit x200 boot from SPI Slave
Hi, My mistake as I had not read the datasheet for this device and based my knowledge on the devices that have embedded flash. I understand better now. From your first post it looks like you have the correct pins connected between the RPi and xmos.(X0D00 chip select(controlled from RPi),X0D10 clock(...
- Wed Oct 18, 2017 12:19 pm
- Forum: Development Tools and Programming
- Topic: SliceKit x200 boot from SPI Slave
- Replies: 4
- Views: 4834
Re: SliceKit x200 boot from SPI Slave
Hi, There is no SPI Slave mode. If X0D05 is high then device will boot from link. The links do not use spi communications. To boot from the flash X0D05 and X0D06 must be low. Making the xmos boot through an xmos link from the RPi, having the PRi behave as an xmos master will be very difficult if not...
- Wed Oct 11, 2017 12:12 pm
- Forum: Other Applications
- Topic: Gigabit PHY (AR8035 replacement)?
- Replies: 12
- Views: 21485
Re: Gigabit PHY (AR8035 replacement)?
I have just designed the TI DP83867IR/CR in a product. It seems to work without a problem. The only change required was to use a PHY Address of 0x0 instead of 0x4.
- Thu Jul 13, 2017 9:39 am
- Forum: Other Applications
- Topic: Xu224 can't boot up, flash can be written and read
- Replies: 6
- Views: 12665
Re: Xu224 can't boot up, flash can be written and read
Yes you need to add a pull up resistor to pin X2D06 for tiles 2 and 3 to boot from link as noted in the datasheet. Also add pull downs or ensure that X2D04, X2D05, X2D07 are low during reset.
- Wed Jul 12, 2017 11:00 am
- Forum: XMOS Devices
- Topic: Stability Test
- Replies: 4
- Views: 6082
Re: Stability Test
I did not do it on purpose. I had a problem with the switching regulator supplying the 1.0V and it was dropping to ~0.93V(with more ripple than it should have as well). The problems that I observed was in USB communications and debug communication which would only some times. The other problem that ...
- Wed Jul 12, 2017 9:26 am
- Forum: XMOS Devices
- Topic: Stability Test
- Replies: 4
- Views: 6082
Re: Stability Test
I can tell from personal experience that a core voltage bellow the specification of 0.95V will definitely create problems and I have seen here in this forum at least another case where a low voltage was creating intermittent errors.
- Sun Jul 02, 2017 7:39 am
- Forum: XMOS Devices
- Topic: Recommendation for XE232-1024-FB374?
- Replies: 4
- Views: 7925
Re: Recommendation for XE232-1024-FB374?
Hi,
I have designed the XEF232-1024-FB374 in a 4 layer PCB with 0.10/0.15mm trace/spacing and 0.45/0.15mm vias using only 2 layers for signal and utilising >90% of the IO pins.
Regards,
I have designed the XEF232-1024-FB374 in a 4 layer PCB with 0.10/0.15mm trace/spacing and 0.45/0.15mm vias using only 2 layers for signal and utilising >90% of the IO pins.
Regards,
- Mon Jun 12, 2017 10:14 pm
- Forum: General Questions
- Topic: Multi Core example
- Replies: 9
- Views: 20950
Re: Multi Core example
Hi, I can only guess what you are trying to achieve but here are some comments on your code: The channels inputs and outputs are blocking. You will find in the documentation that they might have some buffering but initially you need to assume they do not, to build your code correctly. This means tha...
- Fri Mar 10, 2017 6:54 am
- Forum: Q&A
- Topic: debug_printf() alternative
- Replies: 3
- Views: 4877
Re: debug_printf() alternative
Hi, I think these 5 things are required to use printf to debug through the xscope 1) An Xscope Link must be defined in the device XN file. 2) Your project directory must include a config.xscope file with the correct settings 3) Your build command(make file) must include the -fxscope option 4) In the...