Summary:
Introduction to Big Endian and Little Endian:
- Big Endian: Most significant byte is stored at the smallest memory address.
- Little Endian: Least significant byte is stored at the smallest memory address.
Explanation Using a 32-Bit Example:
- Decimal number 133,124 represented in hexadecimal and binary formats.
Hexadecimal Representation:
- Big Endian: Most significant digit is on the left.
- Representation: 133124 (in hexadecimal).
Conversion to Little Endian:
- Move eight bits at a time.
- Rearrange the bytes accordingly:
- First 8 bits remain in place.
- Next 8 bits move to the second position.
- Following 8 bits move to the third position.
- Final 8 bits move to the fourth position.
Binary Representation:
- Similar process in binary format:
- Move the binary bits in groups of eight.
- First 8 bits remain in place.
- Next 8 bits move to the second position.
- Following 8 bits move to the third position.
- Final 8 bits move to the fourth position.
- Similar process in binary format:
Significance of Bit Position:
- Example given with bit positions and their respective powers of two.
- Emphasizes the importance of bit ordering in determining the value of each bit.
GPS Data Format:
- Clarification that GPS data is always in Big Endian format.
- Most significant bit is on the left, least significant bit is on the right.
Conclusion:
- Understanding the difference between Big Endian and Little Endian is essential in data representation.
- GPS data follows the Big Endian format, with the most significant bit first and the least significant bit last.
This summary provides a clear explanation of the difference between Big Endian and Little Endian data formats using a 32-bit example, demonstrating their significance in data representation and emphasizing the adherence of GPS data to the Big Endian format.