allocatepixels.ino

uint8_t *pixels;             // global pixel array
uint8_t NUMPIXELS    = 8;    // number of leds/pixels
uint8_t NUMBYTES     = 3;    // bytes per pixel, RGBW = 4, RGB = 3
uint16_t BUFFBYTES   = NUMPIXELS*NUMBYTES; // bytes to allocate for pixel array

void allocPixelArray(uint8_t numPixels,uint8_t numBytes){
	NUMPIXELS  = numPixels;
	NUMBYTES   = numBytes;
	BUFFBYTES  = numPixels*numBytes;
	Serial.println("allocating " + (String)BUFFBYTES + " bytes");
	if(pixels) free(pixels); // free memory
	pixels = (uint8_t *)malloc(BUFFBYTES); // allocate new memory
	memset(pixels, 0, BUFFBYTES );
}

void allocPixelArray(){
	allocPixelArray(NUMPIXELS,NUMBYTES);
}