Detailed Description

Utility functions.

DO_NOT_INCLUDE_WITH_DOXYGEN

Functions
static void	adcDeInit (void)
	De-initializes the A/D converter. More...

static void	adcInit (void)
	Initializes the A/D converter. More...

static uint16_t	getAdcSample (void)
	Initiates an A/D conversion and reads the sample when done. More...

static float	measureSupplyIR (uint8_t loadSetting)
	Measures the unladed and loaded supply voltage and calculates the intermal resistance of the connected supply. The load is provided by the heater element built in the Si7021. More...

static float	measureSupplyVoltage (unsigned int avg)
	Measures the supply voltage by averaging multiple readings. More...

static void	rtcCb (RTCDRV_TimerID_t id, void *user)
	RTC callback function, called when the timer expired. More...

void	SysTick_Handler (void)
	Interrupt Service Routine for system tick counter. More...

void	UTIL_delay (uint32_t ms)
	Delays number of msTick Systicks (1 ms) More...

uint32_t	UTIL_init (void)
	Sets up the SysTick timer for 1ms interrupts and initializes and starts the RTC timer. More...

bool	UTIL_isLowPower (void)
	Checks if the current power supply has low power capability. More...

void	UTIL_shutdown (void)
	Enter lowest power shutdown mode, EM4S. More...

void	UTIL_sleep (uint32_t ms)
	Delays number of milliseconds in sleep mode (EM2) using the RTC. More...

uint32_t	UTIL_sleepInit (void)
	Sets up the RTC timer used for sleep functions. More...

void	UTIL_supplyGetCharacteristics (uint8_t type, float voltage, float *ir)
	Retrieves the supply characteristic variables. More...

uint8_t	UTIL_supplyGetType (void)
	Returns the type of the power supply. More...

void	UTIL_supplyProbe (void)
	Probes the connected supply and determines its type. The results are stored in global variables. More...

uint32_t	UTIL_waitForEvent (uint32_t timeout)
	Delays number of milliseconds in sleep mode (EM2) using the RTC but but returns if an event wakes up the MCU. More...

Function Documentation

static void adcDeInit ( void )

static

De-initializes the A/D converter.

Returns: None

Definition at line 101 of file util_supply.c.

References _CMU_CTRL_CLKOUTSEL1_MASK, CMU, and PRS_SourceAsyncSignalSet().

Referenced by measureSupplyVoltage().

static void adcInit ( void )

static

Initializes the A/D converter.

Returns: None

Definition at line 64 of file util_supply.c.

References _ADC_CTRL_RESETVALUE, ADC_InitSingle_TypeDef::acqTime, ADC0, ADC_Init(), ADC_INIT_DEFAULT, ADC_InitSingle(), ADC_INITSINGLE_DEFAULT, ADC_PrescaleCalc(), ADC_TimebaseCalc(), adcAcqTime16, adcPRSSELCh4, CMU_ClockEnable(), cmuClock_ADC0, cmuClock_PRS, ADC_InitSingle_TypeDef::negSel, ADC_InitSingle_TypeDef::posSel, ADC_Init_TypeDef::prescale, ADC_InitSingle_TypeDef::prsEnable, ADC_InitSingle_TypeDef::prsSel, ADC_InitSingle_TypeDef::reference, and ADC_Init_TypeDef::timebase.

Referenced by measureSupplyVoltage(), and MIC_init().

static uint16_t getAdcSample ( void )

static

Initiates an A/D conversion and reads the sample when done.

Returns: The output of the A/D conversion

Definition at line 118 of file util_supply.c.

References ADC0, ADC_DataSingleGet(), ADC_IF_SINGLE, ADC_IntGet(), ADC_Start(), and adcStartSingle.

Referenced by measureSupplyVoltage().

static float measureSupplyIR ( uint8_t loadSetting )

static

Measures the unladed and loaded supply voltage and calculates the intermal resistance of the connected supply. The load is provided by the heater element built in the Si7021.

Parameters

[in] loadSetting Heater current setting of the Si7021