get the amount to advance the pointer by

beat16 generates a 16-bit 'sawtooth' wave at a given BPM

beat16 generates a 16-bit 'sawtooth' wave at a given BPM, with BPM specified in Q8.8 fixed-point format; e.g. for this function, 120 BPM MUST BE speci

get the dithering option currently set for this controller

initialize the SPI subssytem

square root for 16-bit integers About three times faster and five times smaller than Arduino's general sqrt on AVR.

stop the SPI output. Pretty much a NOP with software, as there's no registers to kick

Simplified form of bits rotating function. Based on code found here - http://www.hackersdelight.org/hdcodetxt/transpose8.c.txt - rotating data into L

triwave8: triangle (sawtooth) wave generator. Useful for turning a one-byte ever-increasing value into a one-byte value that oscillates up and down.

wait until the SPI subsystem is ready for more data to write. A NOP when bitbanging

take abs() of a signed 8-bit uint8_t

beat8 generates an 8-bit 'sawtooth' wave at a given BPM

blurColumns: perform a blur1d on each column of a rectangular matrix

blurRows: perform a blur1d on every row of a rectangular matrix

zero out the led data managed by this controller

Helper routine to divide a 32-bit value by 1024, returning only the low 16 bits. You'd think this would be just result = (in32 >> 10) & 0xFFFF; and on

ease8InOutCubic: 8-bit cubic ease-in / ease-out function Takes around 18 cycles on AVR

-- Fill RMT buffer Puts 32 bits of pixel data into the next 32 slots in the RMT memory Each data bit is represented by a 32-bit RMT item that specifie

-- Get or create the buffer for the pixel data We can't allocate it ahead of time because we don't have the PixelController object until show is calle

-- Init pulse buffer Set up the buffer that will hold all of the pulse items for this controller. This function is only used when the built-in RMT dri

__attribute__ ((noinline))

__attribute__ ((noinline))

8x8 bit multiplication, with 8 bit result

selectBasedOnHashBit performs this: result = (hash & (1<<bitnumber)) ? a : b but with an AVR asm version that's smaller and quicker than C (and probab

Set the global brightness scaling @param scale a 0-255 value for how much to scale all leds before writing them out

Set the maximum power to be used, given in milliwatts @param milliwatts - the max power draw desired, in milliwatts

Set the maximum power to be used, given in volts and milliamps. @param volts - how many volts the leds are being driven at (usually 5) @param milliamp

show function using the "attached to this controller" led data

-- Start this controller on the given channel This function just initiates the RMT write; it does not wait for it to finish.

A raw set of writing byte values, assumes setup/init/waiting done elsewhere (static for use by adjustment classes)

default values are UNITIALIZED

create an led controller object, add it to the chain of controllers

PixelSet copy constructor

default values are UNINITIALIZED