neorv32_wdt.h

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// ================================================================================ //
// The NEORV32 RISC-V Processor - https://github.com/stnolting/neorv32              //
// Copyright (c) NEORV32 contributors.                                              //
// Copyright (c) 2020 - 2025 Stephan Nolting. All rights reserved.                  //
// Licensed under the BSD-3-Clause license, see LICENSE for details.                //
// SPDX-License-Identifier: BSD-3-Clause                                            //
// ================================================================================ //

 
#ifndef NEORV32_WDT_H
#define NEORV32_WDT_H
 
#include <stdint.h>
 
 
/**********************************************************************/
typedef volatile struct __attribute__((packed,aligned(4))) {
  uint32_t CTRL;  
  uint32_t RESET; 
} neorv32_wdt_t;

#define NEORV32_WDT ((neorv32_wdt_t*) (NEORV32_WDT_BASE))

enum NEORV32_WDT_CTRL_enum {
  WDT_CTRL_EN          =  0, 
  WDT_CTRL_LOCK        =  1, 
  WDT_CTRL_RCAUSE_LO   =  2, 
  WDT_CTRL_RCAUSE_HI   =  3, 
 
  WDT_CTRL_TIMEOUT_LSB =  8, 
  WDT_CTRL_TIMEOUT_MSB = 31  
};

 
 
/**********************************************************************/
#define WDT_PASSWORD (0x709D1AB3)
 
 
/**********************************************************************/
enum NEORV32_WDT_RCAUSE_enum {
  WDT_RCAUSE_EXT = 0b00, 
  WDT_RCAUSE_OCD = 0b01, 
  WDT_RCAUSE_TMO = 0b10, 
  WDT_RCAUSE_ACC = 0b11  
};
 
 
/**********************************************************************/
int  neorv32_wdt_available(void);
void neorv32_wdt_setup(uint32_t timeout, int lock);
int  neorv32_wdt_disable(void);
void neorv32_wdt_feed(uint32_t password);
void neorv32_wdt_force_hwreset(void);
int  neorv32_wdt_get_cause(void);
 
 
#endif // NEORV32_WDT_H