Work in Progress

[decipha]

as many already know the DEC is a project that I've been working on for fun in my spare time whenever I get any

with that said its not high on the priority list so don't expect a release for a little while

I also just changed over from quad atmels 2560s to a single ARM so its been quite a transition

[Shaker666]

ARM is pretty good. Is it a Cortex M3 or M4?

[decipha]

M3

84 mhz
96k sram
512k flash

...and running out of memory quick

[Shaker666]

96K of SRAM is pretty big, though. What compiler are you using? I found that IAR's Embedded Workbench produces binaries smaller and more optimized than GCC. However, with 512K of flash you can store a lot of constants in there instead of consuming SRAM. M3 doesn't have dedicated floating point hardware, but I guess that depends on the application. I used to program a lot of Luminary Micro chips, but we've moved to NXP since TI bought LM out and found a ton of issues with their stuff. LM's programming API and documentation was stellar, though.

[decipha]

im using the AVR compiler same as the atmel on the quarterhorse

at this point it would be more of a headache than its worth for me to change compilers but if i do run out of memory i'll definitely look into it, I'm not too worried about memory just yet since i don't foresee having too much more memory intensive code left, the two largest memory hogs are the gps/navigation coding and the wireless coding for the ieee interface, right now im working out bugs (mostly incompatible memory structure mathematics) and making the code much more efficient, it has been working out pretty well though, currently I have a complete loop occurring about every 5000 microseconds (200 - 210 hz) which is pretty darn fast as compared to say a GUFB ecu which loops about every 36,000 microseconds (from what i gathered from sailorbob, he sent me some logs that chris grey made for him a while back when he was doing some testing for him), which says alot considering i'm using about 10x as much memory with only 6x the processing power

i don't use any floating points for efficiency purposes so its no biggie, i met the main programmer for i want to say motec or some other ecu, but anywho they used texas instrument IC's at the time and he said if he could do it again he wouldn't have used them, he didnt tell me why though and i didn't ask but he said he told me to stay clear of them for ecu's

i have a lot of volatile variables since just about anything can be dynamically altered during an interrupt so i use a good bit of ram, just about any variable can chang at any given time