Component: Circular Buffer (16-bit) (Buffer)

Author	Matrix Ltd
Version	1.5
Category	Buffer

Circular Buffer (16-bit) component

Circular buffer component allowing easy and efficient first in first out (FIFO) style data storage. Also features macros to allow you to check for specific 16-bit values.

Component Source Code

Please click here to download the component source project: FC_Comp_Source_temp/CircularBuffer16.fcfx

Please click here to view the component source code (Beta): FC_Comp_Source_temp/CircularBuffer16.fcfx

Detailed description

No detailed description exists yet for this component

Examples

No additional examples

Macro reference

FlushBuffer

	FlushBuffer
Clears the contents of the buffer and re-initialises the index locations.
- VOID	Return

GetData

	GetData
Reads the next available 16-bit value from the circular buffer, Returns the default value if the buffer is empty.
- UINT	Return

GetIndexedValue

	GetIndexedValue
Gets the value of a single 16-bit value at a known location in the buffer. Leaves the buffer contents and pointers untouched.
- UINT	address
- UINT	Return

GetNumberValues

	GetNumberValues
Returns the number of valid 16-bit data values currently stored inside the buffer.
- UINT	Return

LookForValues

	LookForValues
Scans the buffer for an array of specific values. Returns 0 if the value is not found. Returns 1 if the value is found.
- UINT	Values
- BYTE	NumValues
The number of values you wish to try and match
- BYTE	RemoveContent
0=Leave data alone, 1=Remove data from buffer
- BYTE	ResetFind
0=Continue the find from the last operation, 1=Start again
- BYTE	Return

PeekData

	PeekData
Reads the next available 16-bit data value from the circular buffer without advancing the current index, Returns the default value if the buffer is empty.
- UINT	Return

PutData

	PutData
Add a 16-bit value to the next free location inside the circular buffer. If the data goes into the buffer correctly then return 1. Otherwise the buffer is full and the return value will equal 0.
- UINT	Data
- BYTE	Return

WaitForValues

	WaitForValues
Waits for an array of values to appear in the circular buffer. Returns 0 to indicate a timeout. Returns 1 to indicate the data has been found.
- UINT	Values
- BYTE	NumValues
Number of values to try and look for
- BYTE	RemoveContent
0=Leave the buffer contents untouched, 1=Remove values as you go
- UINT	Timeout
Max amount of time to wait in milliseconds before returning 0=WaitForever
- BYTE	Return

Property reference

	Properties
	Buffer Size
Sets the number of byte elements inside the circular buffer. The maximum number of bytes that can be stored at any one time is this number minus 1.
	Storage Type
When buffer is full this property decides what to do. Store first x values - Will retain the information inside the buffer, new data will be discarded. Store last x values - Will discard the oldest location in the buffer and overwrite with new data.
	Memory Type
	Default Return Data
Specifies the value returned by the receive function when there is no data held in the buffer