XMOS embedded processors. Heart of XMOS technology, XCore.com

Why do I have to rebuild my project before flashing?

Mon, 28 May 2012 02:05:05 GMT

Replies: 0
Views: 3
Last Post By: mifay ON: Mon May 28, 2012 2:05 am
Topic By: mifay ON: Mon May 28, 2012 2:05 am
Strangely, I always need to Clean my build before flashing my program into my XK-1A. Otherwise, the program won't be flashed into my XK-1A even though it's written in the console that the flashing succeeded.

Is there a Serial.available() function for xmos uart?

Mon, 28 May 2012 02:00:46 GMT

Replies: 0
Views: 4
Last Post By: mifay ON: Mon May 28, 2012 2:00 am
Topic By: mifay ON: Mon May 28, 2012 2:00 am
I've looked around a little in xmos uart modules and I couldn't find an equivalent to Arduino's Serial.available() function. Does someone know an equivalent function?

Re: XMOS IMU In Progress

Sun, 27 May 2012 23:26:33 GMT

Replies: 5
Views: 236
Last Post By: rp181 ON: Sun May 27, 2012 11:26 pm
Topic By: rp181 ON: Sun May 27, 2012 11:26 pm
Rest of the hardware added, works great!
http://i.imgur.com/Z6dxK.jpg
http://i.imgur.com/rMtml.jpg

Re: New rocket design : XMOS will fly high in the sky!

Sun, 27 May 2012 00:30:32 GMT

Replies: 5
Views: 387
Last Post By: mifay ON: Sun May 27, 2012 12:30 am
Topic By: mifay ON: Sun May 27, 2012 12:30 am
I'm bumping this thread for a small update about our test launch.

Everything went successfully and we're feeling well prepared for June competition! Here's an astonishing picture of our baby.

There's more here : http://www.facebook.com/pages/Société-Technique-Oronos/219113011480767

(Sorry about the link, unicode doesn't seem supported)

using xflash to generate an image file for SPI flash...

Fri, 25 May 2012 23:01:34 GMT

Replies: 0
Views: 52
Last Post By: yzoer ON: Fri May 25, 2012 11:01 pm
Topic By: yzoer ON: Fri May 25, 2012 11:01 pm
Howdy!

I'm working on a board and would like to program my flash devices using my t(rusty) eprom programmer. XFlash takes the option -o filename which generates a file.

Aside from the numerous warnings and what not xflash outputs, can I just burn the file into flash and then solder it on the board? Seems like I should be able to but figured I'd ask here first...

-Yvo

Re: XTAG-2 firmware

Fri, 25 May 2012 13:12:06 GMT

Replies: 1
Views: 111
Last Post By: XMatt ON: Fri May 25, 2012 1:12 pm
Topic By: XMatt ON: Fri May 25, 2012 1:12 pm
Yes that is the firmware XMOS use for the XTAG-2 and it is kept up to date with any bugfixes and enhancements we have.

Re: Choosing between OTP memory and SPI flash memory

Thu, 24 May 2012 22:17:26 GMT

Replies: 4
Views: 242
Last Post By: yzoer ON: Thu May 24, 2012 10:17 pm
Topic By: yzoer ON: Thu May 24, 2012 10:17 pm
I'll answer that last question myself...

Looking at the documentation (RTFM), there are numerous ways to program / reprogram your flash, which is awesome!

Considering you can encrypt data, run upgrades and what not, it looks like flash seems to be the way to go unless you build your own loader that say, boots from a FAT formatted SD card (tempting...) and you want to store that in OTP.

libflash takes up about 3k with just one device enabled, which is a fair chunk of memory. Having said that, an SD-card interface + FAT filesystem will probably take up more...

-Yvo

Re: Internal pull-ups

Thu, 24 May 2012 21:07:04 GMT

Replies: 2
Views: 233
Last Post By: yzoer ON: Thu May 24, 2012 9:07 pm
Topic By: yzoer ON: Thu May 24, 2012 9:07 pm
Figured as much :-) Thanks for the reply!

-Yvo

Re: Internal pull-ups

Thu, 24 May 2012 21:07:04 GMT

Replies: 2
Views: 233
Last Post By: yzoer ON: Thu May 24, 2012 9:07 pm
Topic By: Andy ON: Thu May 24, 2012 8:40 pm
Hi yzoer,

The I/O on the L series has internal pull downs not pull ups. They are not strong enough to guarantee a defined external value and shouldn't be used in place of resistors.

Re: Choosing between OTP memory and SPI flash memory

Thu, 24 May 2012 22:17:26 GMT

Replies: 4
Views: 242
Last Post By: yzoer ON: Thu May 24, 2012 10:17 pm
Topic By: yzoer ON: Thu May 24, 2012 5:18 pm
@octal

Just read that you can actually encrypt your SPI data, which is nice :-) I take it I can just burn the binary image using an external (eprom) programmer?

-Yvo