/**************************************************************************//**
* @brief Register a callback function at the given frequency.
*
* @param[in] pFunction Pointer to function that should be called at the
* given frequency.
* @param[in] argument Argument to be given to the function.
* @param[in] frequency Frequency at which to call function at.
*
* @return 0 for successful or
* -1 if the requested frequency does not match the RTC frequency.
*****************************************************************************/
int rtcIntCallbackRegister(void (*pFunction)(void*),
void* argument,
unsigned int frequency)
{
RTCDRV_TimerID_t timerId;
rtcCallback = pFunction;
rtcCallbackArg = argument;
RTCDRV_AllocateTimer(&timerId);
RTCDRV_StartTimer(timerId, rtcdrvTimerTypePeriodic, 1000 / frequency,
memLcdCallback, NULL);
return 0;
}
/***************************************************************************//**
* @brief
* Delay ms function
*
* @param[in] ms
* 32bit Time in ms for delay
*
*******************************************************************************/
void delay(uint32_t ms)
{
uint32_t ticks;
ticks = MSEC_TO_TICKS(ms);
delay_done = false;
if (ECODE_EMDRV_RTCDRV_OK != RTCDRV_StartTimer(delay_timer,
rtcdrvTimerTypeOneshot,
ticks,
delay_callback,
0))
fatal("can't initialize delay timer");
while (! delay_done)
EMU_EnterEM2(true);
}
/**************************************************************************//**
* @brief Main function
*****************************************************************************/
int main(void)
{
uint8_t prod_rev;
char string[8];
int i;
uint32_t temp;
uint32_t temp_offset;
/* Chip errata */
CHIP_Init();
/* If first word of user data page is non-zero, enable eA Profiler trace */
BSP_TraceProfilerSetup();
/* Enable peripheral clocks */
CMU_ClockEnable(cmuClock_HFPER, true);
CMU_ClockEnable(cmuClock_ADC0, true);
/* Initialize RTC timer. */
RTCDRV_Init();
RTCDRV_AllocateTimer( &xTimerForWakeUp);
/* Initialize LCD controller without boost */
SegmentLCD_Init(false);
SegmentLCD_AllOff();
/* This is a work around for Chip Rev.D Errata, Revision 0.6. */
/* Check for product revision 16 and 17 and set the offset */
/* for ADC0_TEMP_0_READ_1V25. */
prod_rev = (DEVINFO->PART & _DEVINFO_PART_PROD_REV_MASK) >> _DEVINFO_PART_PROD_REV_SHIFT;
if( (prod_rev == 16) || (prod_rev == 17) )
{
temp_offset = 112;
}
else
{
temp_offset = 0;
}
/* Enable board control interrupts */
gpioSetup();
/* Setup ADC for sampling internal temperature sensor. */
setupSensor();
/* Main loop - just read temperature and update LCD */
while (1)
{
/* Start one ADC sample */
ADC_Start(ADC0, adcStartSingle);
/* Wait in EM1 for ADC to complete */
EMU_EnterEM1();
/* Read sensor value */
/* According to rev. D errata ADC0_TEMP_0_READ_1V25 should be decreased */
/* by the offset but it is the same if ADC reading is increased - */
/* reference manual 28.3.4.2. */
temp = ADC_DataSingleGet(ADC0) + temp_offset;
/* Convert ADC sample to Fahrenheit / Celsius and print string to display */
if (showFahrenheit)
{
/* Show Fahrenheit on alphanumeric part of display */
i = (int)(convertToFahrenheit(temp) * 10);
snprintf(string, 8, "%2d,%1d%%F", (i/10), abs(i%10));
/* Show Celsius on numeric part of display */
i = (int)(convertToCelsius(temp) * 10);
SegmentLCD_Number(i*10);
SegmentLCD_Symbol(LCD_SYMBOL_DP10, 1);
SegmentLCD_Symbol(LCD_SYMBOL_DEGC, 1);
SegmentLCD_Symbol(LCD_SYMBOL_DEGF, 0);
}
else
{
/* Show Celsius on alphanumeric part of display */
i = (int)(convertToCelsius(temp) * 10);
snprintf(string, 8, "%2d,%1d%%C", (i/10), abs(i%10));
/* Show Fahrenheit on numeric part of display */
i = (int)(convertToFahrenheit(temp) * 10);
SegmentLCD_Number(i*10);
SegmentLCD_Symbol(LCD_SYMBOL_DP10, 1);
SegmentLCD_Symbol(LCD_SYMBOL_DEGC, 0);
SegmentLCD_Symbol(LCD_SYMBOL_DEGF, 1);
}
SegmentLCD_Write(string);
/* Sleep for 2 seconds in EM 2 */
RTCDRV_StartTimer( xTimerForWakeUp, rtcdrvTimerTypeOneshot, 2000, NULL, NULL);
EMU_EnterEM2(true);
}
}
