neorv32_slink.h File Reference

Stream Link Interface HW driver header file. More...

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Functions
int	neorv32_slink_available (void)
void	neorv32_slink_setup (uint32_t rx_irq_en, uint32_t tx_irq_en)
void	neorv32_slink_enable (void)
void	neorv32_slink_disable (void)
int	neorv32_slink_get_link_num (int sel)
int	neorv32_slink_get_fifo_depth (int sel)
int	neorv32_slink_tx (int link_id, uint32_t tx_data, int last)
int	neorv32_slink_rx (int link_id, uint32_t *rx_data)

Detailed Description

Stream Link Interface HW driver header file.

Function Documentation

neorv32_slink_available()

int neorv32_slink_available

(

void

)

Check if stream link interface was synthesized.

Returns

0 if SLINK was not synthesized, 1 if SLINK is available.

neorv32_slink_disable()

void neorv32_slink_disable

(

void

)

Deactivate stream link interface.

Note

This will also clear all link FIFOs.

neorv32_slink_enable()

void neorv32_slink_enable

(

void

)

Activate stream link interface.

neorv32_slink_get_fifo_depth()

int neorv32_slink_get_fifo_depth

(

int

sel

)

Get FIFO depth of RX/TX links

Parameters

[in]

sel

0 = RX, =!0 TX

Returns

FIFO depth of RX/TX links (1..32768); 0 if no RX/TX links implemented.

neorv32_slink_get_link_num()

int neorv32_slink_get_link_num

(

int

sel

)

Get number of implemented RX/TX links

Warning

This function overrides NEORV32_SLINK.CTRL!

Parameters

[in]

sel

0 = RX, =!0 TX

Returns

Number of implemented RX/TX links (0..8).

neorv32_slink_rx()

int neorv32_slink_rx	(	int	link_id,
		uint32_t *	rx_data
	)

Read data from RX stream link i (non-blocking)

Parameters

[in]	link_id	Link ID (0..7).
[in]	rx_data	Pointer for received data.

Returns

0 if data was received, -1 if no data available, +1 if data was received and data was marked as "end of packet".

neorv32_slink_setup()

void neorv32_slink_setup	(	uint32_t	rx_irq_en,
		uint32_t	tx_irq_en
	)

Configure and enable SLINK.

Parameters

[in]	rx_irq_en	Enable RX interrupt for link i
[in]	tx_irq_en	Enable TX interrupt for link i

neorv32_slink_tx()

int neorv32_slink_tx	(	int	link_id,
		uint32_t	tx_data,
		int	last
	)

Write data to TX stream link i (non-blocking)

Parameters

[in]	link_id	Link ID (0..7).
[in]	tx_data	Data to send to link.
[in]	last	Set to 1 to indicate this is the "end of packet".

Returns

0 if data was send, -1 if link is still busy (FIFO full)