FIFO implementation. More...

Functions
uint32_t	app_fifo_init (app_fifo_t p_fifo, uint8_t p_buf, uint16_t buf_size)
	Function for initializing the FIFO. More...

uint32_t	app_fifo_put (app_fifo_t *p_fifo, uint8_t byte)
	Function for adding an element to the FIFO. More...

uint32_t	app_fifo_get (app_fifo_t p_fifo, uint8_t p_byte)
	Function for getting the next element from the FIFO. More...

uint32_t	app_fifo_flush (app_fifo_t *p_fifo)
	Function for flushing the FIFO. More...

Data Structures
struct	app_fifo_t
	A FIFO instance structure. Keeps track of which bytes to read and write next. Also it keeps the information about which memory is allocated for the buffer and its size. This needs to be initialized by app_fifo_init() before use. More...

Detailed Description

The size of the FIFO buffer has to be a power of two.

Note: The FIFO implementation only guarantees correct behaviour when having one producer and one consumer. If more than one interrupt level writes to the FIFO data might be lost or over-written.

Function Documentation

Parameters

[out]	p_fifo	FIFO object.
[in]	p_buf	FIFO buffer for storing data. The buffer size has to be a power of two.
[in]	buf_size	Size of the FIFO buffer provided, has to be a power of 2.

Return values

NRF_SUCCESS	If initialization was successful.
NRF_ERROR_NULL	If a NULL pointer is provided as buffer.
NRF_ERROR_INVALID_LENGTH	If size of buffer provided is not a power of two.

Parameters

[in]	p_fifo	Pointer to the FIFO.
[in]	byte	Data byte to add to the FIFO.

Return values

NRF_SUCCESS	If an element has been successfully added to the FIFO.
NRF_ERROR_NO_MEM	If the FIFO is full.

Parameters

[in]	p_fifo	Pointer to the FIFO.
[out]	p_byte	Byte fetched from the FIFO.

Return values

NRF_SUCCESS	If an element was returned.
NRF_ERROR_NOT_FOUND	If there is no more elements in the queue.

uint32_t app_fifo_flush ( app_fifo_t * p_fifo )

Parameters

[in] p_fifo Pointer to the FIFO.

Return values

NRF_SUCCESS If the FIFO flushed successfully.