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Ayke van Laethem 06e298c514 ws2812: write inline assembly using C instead of Go

This is better for various reasons:

  * I don't like the inline assembly implementation in TinyGo. It kinda
    works, but it's hard to use correctly.
  * The Go version had a subtle bug: the i and value variables weren't
    marked as modified. The compiler produced correct code by chance. In
    GCC-style inline assembly, it's possible to correctly mark it as an
    input+output operand.
  * LLVM 14 has some changes to inline assembly that change how memory
    operands can be created. Instead of supporting that, I'd like to get
    rid of memory operands entirely (and possibly inline assembly in
    general).

I did some light testing: the ARM assembly changed a bit but not in any
way that should have a practical effect, and the RISC-V assembly didn't
change at all.

2022-04-21 11:10:18 +02:00

gen-ws2812.go

ws2812: write inline assembly using C instead of Go

2022-04-21 11:10:18 +02:00

ws2812_avr.go

all: use build directives for both Go1.17 and earlier versions

2021-09-16 18:31:33 +02:00

ws2812_cortexm.go

Revert "Added support for 125MHz to WS2812 for RP2040"

2022-02-14 01:06:23 -05:00

ws2812_generic.go

all: use build directives for both Go1.17 and earlier versions