Using PIC SPI to control WS2812b neopixel

gistfile1.txt

void WS281x_Send() {
    //[My] WS2812b seems sensitive only to timing of high, signal can be low for any period less than 50us reset.
    //Using PIC at 32Mhz, SPI at FOSC/4 = 8Mhz
    //Write one SPI byte per WS2812 bit,
    //for WS2812 1 bit use pattern 0b01111110 which is high for 6x125=750ns
    //for WS2812 0 bit use pattern 0b00111000 which is high for 3x125=375ns
    //(keep first SPI bit low as this affects timings - SPI SDO goes high early before the clock starts)
    //and ignore delays between SPI bytes as it stays low
    for (char b=0; b < 3 * LED_COUNT; ++b) {
        char colour = WS281x_buffer[b];
        for (char i = 7; i < 8; --i) {
            SPI1_WriteByte((colour & 1U << i) ? 0b01111110 : 0b00111000);
        }
    }
}

v1 tested on PIC16F15214