neorv32_wdt.h

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// #################################################################################################
// # << NEORV32: neorv32_wdt.h - Watchdog Timer (WDT) HW Driver >>                                 #
// # ********************************************************************************************* #
// # BSD 3-Clause License                                                                          #
// #                                                                                               #
// # Copyright (c) 2023, Stephan Nolting. All rights reserved.                                     #
// #                                                                                               #
// # Redistribution and use in source and binary forms, with or without modification, are          #
// # permitted provided that the following conditions are met:                                     #
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// #    conditions and the following disclaimer.                                                   #
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// # 2. Redistributions in binary form must reproduce the above copyright notice, this list of     #
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// # The NEORV32 Processor - https://github.com/stnolting/neorv32              (c) Stephan Nolting #
// #################################################################################################
 
 
/**********************************************************************/
#ifndef neorv32_wdt_h
#define neorv32_wdt_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_DBEN        =  2, 
  WDT_CTRL_SEN         =  3, 
  WDT_CTRL_STRICT      =  4, 
  WDT_CTRL_RCAUSE_LO   =  5, 
  WDT_CTRL_RCAUSE_HI   =  6, 
  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_WDT = 0b10  
};
 
 
/**********************************************************************/
int  neorv32_wdt_available(void);
void neorv32_wdt_setup(uint32_t timeout, int lock, int debug_en, int sleep_en, int strict);
int  neorv32_wdt_disable(void);
void neorv32_wdt_feed(void);
int  neorv32_wdt_get_cause(void);
#endif // neorv32_wdt_h