caclChannelValue

main5.c

uint32_t caclChannelValue(uint8_t level)
{
    uint32_t val = 0;

    // 0 
    if(level == 0) {
        val = 0x88888888;
    }
    // 255
    else if (level == 255) {
        val = 0xeeeeeeee;
    }
    else {
        // apply 4-bit 0xe HIGH pattern wherever level bits are 1.
        val = 0x88888888;
        for (uint8_t i = 0; i < 8; i++) {
            if((1 << i) & level) {
                uint32_t mask = ~(0x0f << 4*i);
                uint32_t patt = (0x0e << 4*i);
                val = (val & mask) | patt;
            }
        }

        // swap 16 bits
        val = (val >> 16) | (val << 16);
    }

    return val;
}