So, you want to reverse the bits in a byte. That is, the bits should move so:
from: 7 6 5 4 3 2 1 0
to: 0 1 2 3 4 5 6 7
This code will do it, inelegantly - you can find much better algorithms if you search. Can you see how it works though?
uint8_t reverse_bits(uint8_t byte)
{
return ((byte & 0x01) << 7)
|((byte & 0x02) << 5)
|((byte & 0x04) << 3)
|((byte & 0x08) << 1)
|((byte & 0x10) >> 1)
|((byte & 0x20) >> 3)
|((byte & 0x40) >> 5)
|((byte & 0x80) >> 7);
}
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…