/*
 * Method to convert a number to BCD.
 * If a number is odd last nibble will be wet F.
 *
 * minSize can be used to set the number of minimum digits to represent.
 * Examples:
 *    numberToBCD(1)     = [0x1F]
 *    numberToBCD(1, 2)  = [0x01]
 *    numberToBCD(1, 3)  = [0x00, 0x1F]
 *    numberToBCD(1, 4)  = [0x00, 0x01]
 *    numberToBCD(12)    = [0x12]
 *    numberToBCD(12, 3) = [0x01, 0x2F]
 *    numberToBCD(123)   = [0x12, 0x3F]
 *    numberToBCD(1234)  = [0x12, 0x34]
 */
function numberToBCD(number, minSize = 0) {
    const digits = [];
    let numDigits = 1;
    if (number > 0) numDigits = Math.floor(Math.log10(number)) + 1;
    let toFill = 0;
    if (numDigits < minSize) toFill = minSize - numDigits;

    let evenPosition = (numDigits + toFill)%2 == 0;
    if (!evenPosition) digits.push(0x0F); // Add filler value 0xF to last digit
    while ((number + toFill) > 0) {
        const digit = number%10;
        if (number == 0) --toFill;
        if (evenPosition) digits.push(digit);
        else digits[digits.length - 1] |= (digit << 4);
        number = Math.floor(number/10);
        evenPosition = !evenPosition;
    }

    // Add 0 case
    if (digits.lenght == 0) digits.push(0x0F);

    return digits.reverse();
}