Matimus wrote: > Craig wrote: > > I'm trying to switch binary numbers around so that the MSB becomes the > > LSB etc. > > What do you mean 'binary numbers'? They are all binary. If you mean the > int type, they are 32 bits long and there are 16 bits between the MSB > and LSB (Most/Least Significant _Byte_). Do you want to swap the most > significant word with the least significant word? Swap the most > significant nibble with the least significant nibble in a Byte? Or do > you want to completely reverse the bit order? > > To swap nibbles in a byte: > > reverseVal = (val & 0xf) << 4 | (val & 0xf0) >> 4 > > Basicly you are going to need to use the bit operators (|,&, << and >>) > to get what you need. If you could be more specific perhaps I could be > of more help.
Thanks so much for the response. I have an array of individual bytes which will eventually make up a binary bitmap image that is loaded onto an LCD screen (1 = black dot, 0 = white dot). At the moment each byte is reversed to what it should be (completely reverse the bit order): e.g 00111101 should be 10111100, 11001100 should be 00110011, etc. It is not an int problem as such, it is more a bit level swap if you get what I mean. If you could help that would be great. -- http://mail.python.org/mailman/listinfo/python-list
