can i use adafruit trinket 5v with neopixel

I can probably juggle everything into a single asm block - though it makes the code/world a lot uglier to do so (though everything is hidden enough behind macros at the moment that it should be doable). you are limited to fewer operands than there are physical registers, even less when considering that a read/write variable takes up two operand slots!) (Don't even get me started on some of the other arbitrary limitations of asm blocks, e.g. Really, the big issue is that gcc kind of treats asm as an afterthought - but it's what we have to live with. In fact, when I only listed the individual variables that were used, frequently gcc would fuck things up all over the place, not just with timing, but also with variable assignments/uses. The reason why I had to list all the variables with all the asm blocks was, actually, to prevent exactly the type of juggling that gcc is doing here. Yes, my approach is ok - with the gcc versions that i've used so far. I can still send a report to the gcc people if you can build a minimal test case (and ideally confirm the behavior on your system). In any case I think that the compiler is 'formally' allowed to put code between distinct inline assembly blocks, even if it may be impractical (or even stupid?) to do so, hence having the critical code ending up into a single inline assembly block is the most robust solution. I see some blue and green (even if not always in the correct position) instead of all white, sbrs and out are now one after the other but I can still see the dummy MOVWes after that (I am using avr-objdump to see the assembly):īTW is your approach of using the same ASM_VARS for any inline assembly block OK? I mean aren't you kind of lying to the compiler when you say you used registers which you have not? 4 cycles - load a byte from ram into the scaling scratch space with the given offset, clear the target var, clear carry #define LD2(B,O) asm _volatile_('ldd %, Z + %' ASM_VARS ) load a byte from ram into the given var with the given offset +#define QLO2(B, N) asm _volatile_('sbrs %, ' #N ' out %, %' ASM_VARS ) #define QLO2(B, N) asm _volatile_('sbrs %, ' #N ASM_VARS ) LO1 2 cycles, sbrs on flipping the lne to lo if we're pushing out a 0 Diff -git a/clockless_trinket.h b/clockless_trinket.h

Can i use adafruit trinket 5v with neopixel