Basic Library
Digital I/O
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Math
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Bits and Bytes
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Utility
Bits and Bytes
This library is used for bits and bytes operations.
lowByte
- Description
- Extracts the low-order (rightmost) byte of a variable (i.e. a word). For example, extracts 0x34 when given a parameter of 0x1234.
- Syntax
- lowByte(x)
- Parameters
- x: A value of any type
- Returns
- 1 byte (unsigned char)
highByte
- Description
- Extracts the high-order (leftmost) byte of a word. For example, extracts 0x12 when given a parameter of 0x1234.
- Syntax
- highByte(x)
- Parameters
- x: A value of any type
- Returns
- 1 byte (unsigned char)
bitRead
- Description
- Reads the specified bit.
- Syntax
- bitRead(x, n)
- Parameters
- x: A value of any type
n: The position of the bit to be read - Returns
- The value of the bit (0 or 1)
bitWrite
- Description
- Writes the specified bit.
- Syntax
- bitWrite(x, n, b)
- Parameters
- x: A value of any type
n: The location of the bit to write
b: The value to write to the bit (0 or 1) - Returns
- None
bitSet
- Description
- Sets (writes 1 to) the specified bit.
- Syntax
- bitSet(x, n)
- Parameters
- x: A value of any type
n: The location of the bit to be set to 1 - Returns
- None
bitClear
- Description
- Sets (writes 0 to) the specified bit.
- Syntax
- bitClear(x, n)
- Parameters
- x: A value of any type
n: The location of the bit to be set to 0 - Returns
- None
bit
- Description
- Computes the value of the specified bit (bit 0 is 1, bit 1 is 2, bit 2 is 4, etc.).
- Syntax
- bit(n)
- Parameters
- n: The location of the bit that will be calculated
- Returns
- The value of the bit
Sample Program
Sample for lowByte and highByte.
#include <Arduino.h>
void setup()
{
uint16_t data = 0x1234;
Serial.begin(9600);
while(!Serial.available()); // wait to key press.
Serial.println(data, HEX);
Serial.println(lowByte(data), HEX);
Serial.println(highByte(data), HEX);
}
void loop()
{
}