neorv32_trng.h

Go to the documentation of this file.

// ================================================================================ //
// The NEORV32 RISC-V Processor - https://github.com/stnolting/neorv32              //
// Copyright (c) NEORV32 contributors.                                              //
// Copyright (c) 2020 - 2024 Stephan Nolting. All rights reserved.                  //
// Licensed under the BSD-3-Clause license, see LICENSE for details.                //
// SPDX-License-Identifier: BSD-3-Clause                                            //
// ================================================================================ //
 
#ifndef neorv32_trng_h
#define neorv32_trng_h
 
#include <stdint.h>
 
 
/**********************************************************************/
typedef volatile struct __attribute__((packed,aligned(4))) {
  uint32_t CTRL;  
} neorv32_trng_t;
 
#define NEORV32_TRNG ((neorv32_trng_t*) (NEORV32_TRNG_BASE))
 
enum NEORV32_TRNG_CTRL_enum {
  TRNG_CTRL_DATA_LSB        =  0, 
  TRNG_CTRL_DATA_MSB        =  7, 
  TRNG_CTRL_FIFO_LSB        = 16, 
  TRNG_CTRL_FIFO_MSB        = 19, 
  TRNG_CTRL_IRQ_SEL         = 27, 
  TRNG_CTRL_FIFO_CLR        = 28, 
  TRNG_CTRL_SIM_MODE        = 29, 
  TRNG_CTRL_EN              = 30, 
  TRNG_CTRL_VALID           = 31  
};
/**********************************************************************/
int  neorv32_trng_available(void);
void neorv32_trng_enable(int irq_sel);
void neorv32_trng_disable(void);
void neorv32_trng_fifo_clear(void);
int  neorv32_trng_get_fifo_depth(void);
int  neorv32_trng_get(uint8_t *data);
int  neorv32_trng_check_sim_mode(void);
#endif // neorv32_trng_h