Power supply measurement#

Power supply measurement HW abstraction designed for development boards with coin cell battery support, i.e. Thunderboard and Dev Kit. Not suitable for other applications.

Functions#

void
sl_power_supply_get_characteristics(uint8_t *type, float *voltage, float *ir)
float
sl_power_supply_measure_voltage(unsigned int avg)

Macros#

#define
SL_POWER_SUPPLY_TYPE_UNKNOWN 0

Unknown power supply type.

#define
SL_POWER_SUPPLY_TYPE_USB 1

The board powered from the USB connector.

#define
SL_POWER_SUPPLY_TYPE_AA 2

The board powered from AA batteries.

#define
SL_POWER_SUPPLY_TYPE_AAA 3

The board powered from AAA batteries.

#define
SL_POWER_SUPPLY_TYPE_CR2032 4

The board powered from a CR2032 battery.

Function Documentation#

sl_power_supply_probe#

void sl_power_supply_probe (void )
Parameters
TypeDirectionArgument NameDescription
voidN/A

Probe the connected supply and determine its type.

Note


sl_power_supply_get_characteristics#

void sl_power_supply_get_characteristics (uint8_t * type, float * voltage, float * ir)
Parameters
TypeDirectionArgument NameDescription
uint8_t *[out]type

Supply type.

float *[out]voltage

Supply voltage.

float *[out]ir

Internal resistance of the supply.

Retrieve the supply characteristic variables.


sl_power_supply_get_type#

uint8_t sl_power_supply_get_type (void )
Parameters
TypeDirectionArgument NameDescription
voidN/A

Getter for the power supply type.

Returns

  • Power supply type represented as an integer.


sl_power_supply_is_low_power#

bool sl_power_supply_is_low_power (void )
Parameters
TypeDirectionArgument NameDescription
voidN/A

Checks if the current power supply has low power capability.

Returns

  • True if the supply is low power type, false otherwise.


sl_power_supply_measure_voltage#

float sl_power_supply_measure_voltage (unsigned int avg)
Parameters
TypeDirectionArgument NameDescription
unsigned int[in]avg

Number of measurements to average.

Measure the supply voltage by averaging multiple readings.

Returns

  • The measured voltage.


sl_power_supply_get_battery_level#

uint8_t sl_power_supply_get_battery_level (void )
Parameters
TypeDirectionArgument NameDescription
voidN/A

Measure the battery level.

Returns

  • The estimated battery capacity level in percent.