neorv32_trng.c File Reference

True Random Number Generator (TRNG) HW driver source file. More...

#include <neorv32.h>

Functions
int	neorv32_trng_available (void)
void	neorv32_trng_enable (void)
void	neorv32_trng_disable (void)
void	neorv32_trng_fifo_clear (void)
int	neorv32_trng_get_fifo_depth (void)
int	neorv32_trng_data_avail (void)
uint8_t	neorv32_trng_data_get (void)
int	neorv32_trng_check_sim_mode (void)

Detailed Description

True Random Number Generator (TRNG) HW driver source file.

Function Documentation

neorv32_trng_available()

int neorv32_trng_available

(

void

)

Check if TRNG unit was synthesized.

Returns

0 if TRNG was not synthesized, non-zero if TRNG is available.

neorv32_trng_check_sim_mode()

int neorv32_trng_check_sim_mode

(

void

)

Check if TRNG is implemented using SIMULATION mode.

Warning

In simulation mode the physical entropy source is replaced by a PRNG (LFSR) with very bad random quality.

Returns

Simulation mode active when not zero.

neorv32_trng_data_avail()

int neorv32_trng_data_avail

(

void

)

Check if at least one byte of random is available.

Returns

0 if no data available, non-zero if at least one byte is available.

neorv32_trng_data_get()

uint8_t neorv32_trng_data_get

(

void

)

Get random data byte from TRNG (non-blocking). Check before if data is available using neorv32_trng_data_avail().

Returns

Random data byte.

neorv32_trng_disable()

void neorv32_trng_disable

(

void

)

Reset and disable TRNG.

neorv32_trng_enable()

void neorv32_trng_enable

(

void

)

Reset and enable TRNG.

neorv32_trng_fifo_clear()

void neorv32_trng_fifo_clear

(

void

)

Flush TRNG random data FIFO.

neorv32_trng_get_fifo_depth()

int neorv32_trng_get_fifo_depth

(

void

)

Get TRNG FIFO depth.

Returns

TRNG FIFO size (number of entries).