Customizing NeoPixel Compatible LED Ring (WS2812) colors and brightness using ILI9341 2.8" Touch Screen Lcd, the color is modulated using RGB 24 bit values.

Note :

Later in the code, the conversion from RGB 24 bits to RGB 16 bits is due to a method (fillRoudRect) that accepts only uint16_t colors as arguments, we use this function to represent the resulting color on screen from different r g b values selected

Documentation

barClicked()

Detect which bar is clicked (brightness, red, blue green)

lightLamp()

light the neo pixel lamp using the RGB values picked on screen

decimalToBinary(int color, int array)

transfer a color represented in decimal to binary and save it in an array passed as an argument - in our case, the array is a global variable-

binaryToDecimal(int array)

return decimal representation (uint16_t) of a color represented in binary (array of 16 bits)

brightnessInput()

draw the brightness bar

modulateBrightness()

on screen touch, reads the brightness value entered by user

updateBrightnessBar()

change brightness bar width to match brightness value

redInput()

draw the red bar

modulateRed()

on screen touch, reads the red color value entered by user

updateRedBar()

change red bar width to match red color value

greenInput()

draw the green bar

modulateGreen()

on screen touch, reads the green color value entered by user

updateGreenBar()

change red bar width to match green color value

blueInput()

draw the blue bar

modulateBlue()

on screen touch, reads the blue color value entered by user

updateBlueBar()

change red bar width to match blue color value

displayColorOnScreen()

draw the rectangle that displays the current choosed color

updateColorOnScreen()

on modifying r g b values update the color displayed on screen

display()

populate the screen (r g b brightness bars + color)