WS2812

This is a simple library for controlling WS2812 LEDs with an CH552 microcontroller. It is based on the WS2812 datasheet and the CH552 datasheet.

Fig. 16 WS2812 LED Strip

Table 5 Pin Mapping for WS2812

PIN	GPIO CH552
DOUT	P3.3

#define delay 100
#define NeoPixel 16 // Number Neopixel conect
#define level 100 // Ilumination level 0 to 255

void randomColorSequence(void) {

for(int j=0;j<NeoPixel;j++){
    uint8_t red = rand() % level;
    uint8_t green = rand() % level;
    uint8_t blue = rand() % level;
    uint8_t num = rand() % NeoPixel;

    for(int i=0; i<num; i++){
        NEO_writeColor(0, 0, 0);
    }
    NEO_writeColor(red, green, blue);
    DLY_ms(delay);
    NEO_writeColor(0, 0, 0);
    }

    for(int l=0; l<9; l++){
        NEO_writeColor(0, 0, 0);
    }

}

void colorSequence(void) {

for(int j=0;j<=NeoPixel;j++){
        uint8_t red = rand() % level;
        uint8_t green = rand() % level;
        uint8_t blue = rand() % level;
    for(int i=0; i<j; i++){
        NEO_writeColor(red, green, blue);
    }
    DLY_ms(delay);
    for(int l=0; l<j; l++){
        NEO_writeColor(0, 0, 0);
    }
}
}

// ===================================================================================
// Main Function
// ===================================================================================
void main(void) {
NEO_init();                       // init NeoPixels
CLK_config();                     // configure system clock
DLY_ms(delay);                       // wait for clock to settle

// Loop
while (1) {
    randomColorSequence();
    DLY_ms(100);
    colorSequence();
    DLY_ms(100);
}
}