EFM32 Timer frequency meter

// $[TIMER0...3  initialization]
TIMER_Init_TypeDef init = TIMER_INIT_DEFAULT;

init.enable = 1;
init.debugRun = 0;
init.dmaClrAct = 0;
init.sync = 0;
init.clkSel = timerClkSelHFPerClk;
init.prescale = timerPrescale1;
init.fallAction = timerInputActionNone;
init.riseAction = timerInputActionNone;
init.mode = timerModeUp;
init.quadModeX4 = 0;
init.oneShot = 0;
init.count2x = 0;
init.ati = 0;
TIMER_Init(TIMER3, &init);
// [TIMER0...3  initialization]$


// $[TIMER CC0 ... CC2 init]
TIMER_InitCC_TypeDef initCC0 = TIMER_INITCC_DEFAULT;

initCC0.prsInput = false;
initCC0.prsSel = timerPRSSELCh0;
initCC0.edge = timerEdgeRising;
initCC0.mode = timerCCModeOff;
initCC0.eventCtrl = timerEventEveryEdge;
initCC0.filter = 0;
initCC0.cofoa = timerOutputActionNone;
initCC0.cufoa = timerOutputActionNone;
initCC0.cmoa = timerOutputActionNone;
initCC0.coist = 0;
initCC0.outInvert = 0;
TIMER_InitCC(TIMER3, 0, &initCC0);
// [TIMER CC0 ... CC2 init]$