bit()

Description

Create a bitmask with a single bit set at a specific position. Useful for bitwise operations, like setting, clearing, or testing specific bits in a byte or register.

Syntax

Use the following function to set the bit state on the

n

bit(n)

Parameters

The function admits the following parameter:

n

n

Returns

The function returns an unsigned byte (aka uint8_t) with only bit n set to

1

0

Example Code

Modify a given byte

x

1

1uint8_t x = 0b00000000; // initial byte 
2
3void setup() {
4  Serial.begin(9600);
5  
6  int index = 6; // index of the bit to modify
7  
8  x |= bit(index-1);
9
10  Serial.print("The resulting byte is: ");
11  Serial.println(x, BIN);
12 
13}
14
15void loop() {
16}

Note

This is what the

bit()

1#define bit(n) (1 << (n))

See also

• bitClear()
• bitRead()
• bitSet()
• bitWrite()
• highByte()
• lowByte()