Storage Architecture
Memory allocation schemas often utilize fixed-size arrays where the start and end of the storage area are logically connected to enable continuous data reuse. A circular buffer implements this model to manage high-speed data streams between asynchronous processes. This mechanism avoids the overhead of shifting array elements.
Memory is treated as a continuous ring.
Pointer Management
Read/write operations rely on two independent indices that track the boundaries of active data. When a sensor writes to the circular buffer, the write index advances to the next position. A read operation follows behind, advancing the read index as data is consumed.
If the write pointer catches up to the read pointer, the buffer is full.
Overwrite Boundary
Data loss prevention is a critical requirement in real-time embedded systems. When the circular buffer becomes full, incoming samples must either be rejected or write over the oldest unread data. This choice determines the stability of the measurement pipeline.
In most telemetry applications, older points are overwritten to maintain current readings. This behavior must be configured to prevent buffer overflows from corrupting critical state information.
System Utility
Filters designed for data smoothing benefit from this structure. Digital signal processing routines pull a continuous window of points from the buffer to compute moving averages. This approach stabilizes data throughput.
