ra8_lpm_safe_boot.h

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#pragma once
 
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif

typedef enum : uint16_t {
  k_ra8_lpm_safe_boot_prcr_unlock = 0xA502U, 
  k_ra8_lpm_safe_boot_prcr_relock = 0xA500U, 
} ra8_lpm_safe_boot_prcr_t;

typedef enum : uintptr_t {
  k_ra8_lpm_safe_boot_prcr_addr    = 0x4001E3FAUL, 
  k_ra8_lpm_safe_boot_sbycr_addr   = 0x4001E00CUL, 
  k_ra8_lpm_safe_boot_lpscr_addr   = 0x4001EA90UL, 
  k_ra8_lpm_safe_boot_dpsbycr_addr = 0x4001EA00UL, 
} ra8_lpm_safe_boot_addr_t;

typedef enum : uint8_t {
  k_ra8_lpm_safe_boot_lpscr_sleep   = 0x00U, 
  k_ra8_lpm_safe_boot_sbycr_reset   = 0x40U, 
  k_ra8_lpm_safe_boot_dpsbycr_reset = 0x14U, 
} ra8_lpm_safe_boot_val_t;

[[gnu::always_inline]] static inline void ra8_lpm_safe_boot(void)
{
#ifndef RA8_OFF_TARGET
  /* SYSC.PRCR (16-bit, write-protect key) */
  volatile uint16_t* const prcr = (volatile uint16_t*)k_ra8_lpm_safe_boot_prcr_addr;
  /* SBYCR (8-bit) -- Standby Control Register */
  volatile uint8_t* const sbycr = (volatile uint8_t*)k_ra8_lpm_safe_boot_sbycr_addr;
  /* LPSCR (8-bit) -- Low Power State Control Register */
  volatile uint8_t* const lpscr = (volatile uint8_t*)k_ra8_lpm_safe_boot_lpscr_addr;
  /* DPSBYCR (8-bit) -- Deep Software Standby Ctrl */
  volatile uint8_t* const dpsbycr = (volatile uint8_t*)k_ra8_lpm_safe_boot_dpsbycr_addr;
 
  *prcr    = (uint16_t)k_ra8_lpm_safe_boot_prcr_unlock;
  *lpscr   = (uint8_t)k_ra8_lpm_safe_boot_lpscr_sleep;
  *sbycr   = (uint8_t)k_ra8_lpm_safe_boot_sbycr_reset;
  *dpsbycr = (uint8_t)k_ra8_lpm_safe_boot_dpsbycr_reset;
  *prcr    = (uint16_t)k_ra8_lpm_safe_boot_prcr_relock;
#endif /* RA8_OFF_TARGET */
}
 
#ifdef __cplusplus
}
#endif