Linked Questions

How can I set, clear, and toggle a bit?

I've been attempting to learn C in my spare time, and other languages (C#, Java, etc.) have the same concept (and often the same operators)... At a core level, what does bit-shifting (<<, >&...

I was facing this unique problem of generating a bit-mask based on the input parameter. For example, if param = 2, then the mask will be 0x3 (11b) if param = 5, then the mask will be 0x1F (1 1111b) ...

Say I have a byte like this 1010XXXX where the X values could be anything. I want to set the lower four bits to a specific pattern, say 1100, while leaving the upper four bits unaffected. How would I ...

I've been looking at posts about masks, but I still can't get my head around how to extract certain bits from a number in C. Say if we have an integer number, 0001 1010 0100 1011, its hexadecimal ...

How would I simplify all of this into one line? REG &= ~BITA; REG &= ~BITB; REG &= ~BITC; REG &= ~BITD; REG &= ~BITE;

I know there is another post here that is how to clear a single bit, but how about a whole byte? For example, if I had 00000000 00000000 00101100 11000100 and I wanted to clear the second chunk so it ...

How can I set multiple bits to 0 in C when working with CR registers with SPI? I know that for setting individual bits I do: SPI1->CR1 |= (1<<2); // To set bit 2 SPI1->CR1 &= ~(1<&...

I am working on a toy file system, I am using a bitset to keep track of used and unused pages. I am using an array of ints (in order to use GCC's built in bit ops.) to represent the bitset. I am not ...

I haven't been able to find an answer to this on Google, nor do I have any better search ideas. If I have a 2 byte number, a mask, and a third number, how do I replace the masked bits with the third ...

I have packed data of rgba values in an 16 bit short, so for each channel goes 4bit, how can I change specific channel only, lets say I want to change red channel to it's value devided by two. I know ...