Power-fail comparator (hal_pof) [nRF24LE1 HAL]

---

The Power-fail comparator provides the MCU with an early warning of impending power failure. A flag wil be raised when the system supply voltage is below a configurable threshold voltage.

Enumerations
enum	hal_pof_threshold_t { HAL_POF_THRESHOLD_2_1V = 0x00, HAL_POF_THRESHOLD_2_3V = 0x20, HAL_POF_THRESHOLD_2_5V = 0x40, HAL_POF_THRESHOLD_2_7V = 0x60 }
Functions
void	hal_pof_enable (_Bool enable)
void	hal_pof_set_threshold (hal_pof_threshold_t threshold)
_Bool	hal_pof_warning (void)

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Enumeration Type Documentation

enum hal_pof_threshold_t

An enum used for different POF thresholds.

Enumerator:

HAL_POF_THRESHOLD_2_1V
HAL_POF_THRESHOLD_2_3V
HAL_POF_THRESHOLD_2_5V
HAL_POF_THRESHOLD_2_7V

Definition at line 34 of file hal_pof.h.

{
  HAL_POF_THRESHOLD_2_1V = 0x00,
  HAL_POF_THRESHOLD_2_3V = 0x20,
  HAL_POF_THRESHOLD_2_5V = 0x40,
  HAL_POF_THRESHOLD_2_7V = 0x60
} hal_pof_threshold_t;

---

Function Documentation

void hal_pof_enable

(

_Bool

enable )

Function to enable or disable the Power-fail comparator

Parameters:

enable

Boolean value. True = enable, false = disable.

Definition at line 21 of file hal_pof.c.

{
    if(enable)
        POFCON |= 0x80;
    else
        POFCON &= ~0x80;
}

void hal_pof_set_threshold

(

hal_pof_threshold_t

threshold )

Function setting the threshold voltage for the Power-fail comparator

Parameters:

threshold

selects the threshold for the Power-fail comparator HAL_POF_THRESHOLD_2_1V HAL_POF_THRESHOLD_2_3V HAL_POF_THRESHOLD_2_5V HAL_POF_THRESHOLD_2_7V

Definition at line 29 of file hal_pof.c.

{
    POFCON &= ~0x60;
    POFCON |= ((uint8_t)threshold & 0x60);
}

_Bool hal_pof_warning

(

void

)

Checks for low voltage warning from the Power-fail comparator

Definition at line 35 of file hal_pof.c.

{
    if(POFCON & 0x10)
        return true;
    else
        return false;
}