I'm working on modifying this project FASTER NEOPIXELS To be able to address multiple strings of WS2812 LEDs, and have been having a terrible time of it. I've literally spend like 5 hours researching, and I can't for the life of me get it. instead of this... #define PIXEL_PORT PORTB #define PIXE…

I don't know about passing to an assembler block, but to pass a PORT to a 'C' function you have to pass the a pointer to it. For example: #include "Arduino.h" void setBit(volatile uint8_t *portPtr); void setup() { setBit(&PORTB); setBit(&PORTC); } void loop() { } void setBit(volatile uint8_t…

Ok, I simplified it based on your suggestions, no dice. BT_LED_CONTROLLER.ino (10.8 KB)

Is there any reason you want to write your code in assembly beside to torture yourself?

So now you have to go figure out what the '_SFR_IO_ADDR' does and is it still appropriate to use it now that you're no longer using the PORTB macro. EDIT: FYI, it's defined in sfr_defs.h.

Maybe this will help. &PORTB returns the 'memory' address, you need the 'IO' address. &PORTB - __SFR_OFFSET returns the 'IO' address. (C variable) void SetBit( volatile uint8_t *port, uint8_t bit ) { port = port - __SFR_OFFSET; asm("sbi %0, %1" : : "I" (port),"I" (bit) ); } void setup() { p…

I want to do something like this. sendBit(byte PORT, int BIT, bool bitVal) { asm volatile( "sbi %[port], %[bit] \n\t" //etc "cbi %[port], %[bit] \n\t" // etc :: [port] "I"(_SFR_IO_ADDR(PORT)), [bit] "I"(BIT), [onCycles] "I"(N…

Passing PORT and BIT as parameters to asm block

Projects Programming

naja452 April 5, 2019, 7:55pm 2

Also here's my full code.

BT_LED_CONTROLLER.ino (10.9 KB)

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Passing PORT and BIT as parameters to asm block

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