Best setting for free-running timer BlueNRG-1

[Diltech]

How is the best configuration for setting MTF as free-running timer ?

void MFT_Configuration()
{
 MFT_InitType timer_init;
 NVIC_InitType NVIC_InitStructure;
 
 SysCtrl_PeripheralClockCmd(CLOCK_PERIPH_MTFX1, ENABLE);
 
 /* Init MFT1 in mode 2 */
 timer_init.MFT_Clock1 = MFT_PRESCALED_CLK;
 timer_init.MFT_Clock2 = MFT_NO_CLK;
 timer_init.MFT_Mode = MFT_MODE_2;
 timer_init.MFT_CRA = 0xFFFF;
 timer_init.MFT_CRB = 0xFFFF;
 
 /* If a square waveform is @ input with a frequency of 10kHz => T = 100 us
 *
 * with Prescaler = 16 - 1; => 1us sampling period
 * the counter number within a period is 100.
 * 
 * with Prescaler = 1 - 1; => 62.5ns sampling period
 * the counter number within a period is 16000. More resolution.
 */
 timer_init.MFT_Prescaler = 1-1;
 
 MFT_Init(MFT1, &timer_init);
 
 /* Set the TnCNT1 at the max value. No matter about the TnCNT2 since it is not used. */
 MFT_SetCounter(MFT1, 0xFFFF, 0xFFFF);
 
 /* Enable MFT irq */
 NVIC_InitStructure.NVIC_IRQChannel = MFT1A_IRQn;
 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = LOW_PRIORITY;
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStructure);
}

 

Thank