Generate an 8-bit random number

This version of scale8 does not clean up the R1 register on AVR If you are doing several 'scale8's in a row, use this, and then explicitly call cleanu

scale one byte by a second one, which is treated as the numerator of a fraction whose denominator is 256 In other words, it computes i * (scale / 256)

naive writeByte implelentation, simply calls writeBit on the 8 bits in the byte.

add one byte to another, saturating at 0xFF @param i - first byte to add @param j - second byte to add @returns the sum of i & j, capped at 0xFF

Clean up the r1 register after a series of *LEAVING_R1_DIRTY calls

subtract one byte from another, saturating at 0x00 @returns i - j with a floor of 0

Generate a 16 bit random number

there are 1024 microseconds per overflow counter tick.

advance the data pointer forward, adjust position counter

naive writeByte implelentation, simply calls writeBit on the 8 bits in the byte.

beatsin88 generates a 16-bit sine wave at a given BPM, that oscillates within a given range. For this function, BPM MUST BE SPECIFIED as a Q8.8 fixed-

Do we have n pixels left to process?

Helper functions to get around gcc stupidities

step the dithering forward

beatsin8 generates an 8-bit sine wave at a given BPM, that oscillates within a given range.

write a byte out via SPI (returns immediately on writing register)

get the next controller in the chain after this one. will return NULL at the end of the chain

Get the number of leds in the first controller @returns the number of LEDs in the first controller

cubicwave8: cubic waveform generator. Spends visibly more time at the limits than 'sine' does.

Get a pointer to led data for the first controller @returns pointer to the CRGB buffer for the first controller

The "video" version of scale8 guarantees that the output will be only be zero if one or both of the inputs are zero. If both inputs are non-zero, the

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

saturating 8x8 bit multiplication, with 8 bit result @returns the product of i * j, capping at 0xFF

beatsin16 generates a 16-bit sine wave at a given BPM, that oscillates within a given range.

often one wants a separator and an integer, do a helper

In place modifying version of scale8_video, also this version of nscale8_video does not clean up the R1 register on AVR If you are doing several 'scal

This version of scale8_video does not clean up the R1 register on AVR If you are doing several 'scale8_video's in a row, use this, and then explicitly

Get the average of the R, G, and B values

scale three one byte values by a fourth one, which is treated as the numerator of a fraction whose demominator is 256 In other words, it computes r,g,

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

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

Calculate an integer average of two signed 7-bit integers (int8_t) If the first argument is even, result is rounded down. If the first argument is odd

blur1d: one-dimensional blur filter. Spreads light to 2 line neighbors. blur2d: two-dimensional blur filter. Spreads light to 8 XY neighbors. 0 = no

-- Convert a byte into RMT pulses This function is only used when the built-in RMT driver is chosen

linear interpolation between two unsigned 16-bit values, with 16-bit fraction

linear interpolation between two unsigned 8-bit values, with 8-bit fraction

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

This function sets up a palette of black and white stripes, using code. Since the palette is effectively an array of sixteen CRGB colors, the various

beat8 generates an 8-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

Fast 8-bit approximation of cos(x). This approximation never varies more than 2% from the floating point value you'd get by doing float s = (cos(x) *

get the dithering option currently set for this controller