System¶
A hardware independent interface for starting and resetting the system.
Description¶
The API allows the user to detect whether a debugger is connected,
sissue a soft reset, and enumerate the reset causes. The functions are
implemented in the MCU specific directories e.g. hal_reset_cause.c,
hal_system.c, and hal_system_start.c in
/hw/mcu/nordic/nrf52xxx/src/ directory for Nordic nRF52 series of
chips.
API¶
-
enum
hal_reset_reason¶ Reboot reason.
Values:
-
enumerator
HAL_RESET_POR¶ Power on Reset.
-
enumerator
HAL_RESET_PIN¶ Caused by Reset Pin.
-
enumerator
HAL_RESET_WATCHDOG¶ Caused by Watchdog.
-
enumerator
HAL_RESET_SOFT¶ Soft reset, either system reset or crash.
-
enumerator
HAL_RESET_BROWNOUT¶ Low supply voltage.
-
enumerator
HAL_RESET_REQUESTED¶ Restart due to user request.
-
enumerator
-
void hal_system_reset (void) __attribute((noreturn)) System reset.
-
void hal_system_start (void *img_start) __attribute((noreturn)) Called by bootloader to start loaded program.
-
void hal_system_restart (void *img_start) __attribute((noreturn)) Called by split app loader to start the app program.
-
int
hal_debugger_connected(void)¶ Returns non-zero if there is a HW debugger attached.
-
enum hal_reset_reason
hal_reset_cause(void)¶ Return the reboot reason.
- Return
A reboot reason
-
const char *
hal_reset_cause_str(void)¶ Return the reboot reason as a string.
- Return
String describing previous reset reason
-
void
hal_system_clock_start(void)¶ Starts clocks needed by system.