Embedded Programming: Data Types, Operators Embedded Programming
1. Unit-IV
On-Chip Peripherals And Programming
Embedded Programming: Data Types,
Operators Embedded Programming: Data
Conversion, I/O Programming Timer/Counter:
Operating Modes, Programming.
UART:Operating Modes, Programming.
2. data types
• The primary data types used in Embedded C
are: int (integer), char (character), float
(floating point), double (double precision
floating point), along with modifiers like
"unsigned" and "short" to adjust the size and
range of the data depending on the specific
hardware requirements; "void" is also used for
functions that don't return any value.
3. Key points about data types in Embedded C:
• Int: Most commonly used for whole numbers, usually signed
by default.
• Char: Represents a single character.
• Unsigned: Can be used with integer types to store only
positive values, allowing for a larger positive range.
• Short: Can be used to declare smaller integer variables,
often useful for memory-constrained systems.
• Float/Double: Used for decimal values, with "double"
offering higher precision at the cost of more memory usage.
4. Important considerations when choosing data types in Embedded
C:
• Memory constraints:
• Microcontrollers often have limited memory, so choosing the
smallest appropriate data type is crucial.
• Hardware specific details:
• The exact size and range of each data type can vary depending
on the microcontroller architecture.
• Bit manipulation:
• Embedded systems often require direct manipulation of
individual bits, which can be achieved using bitwise operators.
