Hi ,
I am working on FTM module for S32K148 controller. I have initialize the module as Free running counter .as below.
Init_FTM0()
{
PCC->PCCn[PCC_FLEXTMR0_INDEX] &= 0xFFFFFFFF ^ PCC_PCCn_CGC_MASK;
PCC->PCCn[PCC_FLEXTMR0_INDEX] |= PCC_PCCn_PCS(6);
PCC->PCCn[PCC_FLEXTMR0_INDEX] |= PCC_PCCn_CGC_MASK;
FTM0->MODE |= FTM_MODE_FTMEN_MASK;
FTM0->MOD = 40000;
FTM0->CNTIN = 0x00;
FTM0->SC |= FTM_SC_TOIE_MASK | FTM_SC_PS(0) FTM_SC_CLKS(3);
NVIC->ISER[(104/32)] = (1 << (104 % 32));
}
In handler i am just clearing the TOF flag and then toggling the LED as below:
void FTM0_IRQHandler (void)
{
if( FTM0->SC & FTM_SC_TOF_MASK )
{
FTM0->SC &= 0xFFFFFFFF ^ FTM_SC_TOF_MASK;
PTD->PTOR |= 1<<0;
}
}
In the above case each time counter over flow the 40000 , interrupt will trigger and control will come to FTM0_IRQHandler () .
now , i want that after the first time when interrupt trigger and FTM0_IRQHandler execute,My FTM0 module got stop after serving the ISR. And Never trigger again. Means not only IRQ but alos FTM0 become disable .So i modified the IRQHandler as below :
void FTM0_IRQHandler (void)
{
if( FTM0->SC & FTM_SC_TOF_MASK )
{
FTM0->SC &= 0xFFFFFFFF ^ FTM_SC_TOF_MASK;
PTD->PTOR |= 1<<0;
FTM0->MODE &= (~FTM_MODE_FTMEN_MASK);
NVIC_ICER[104/32] = NVIC_ICER[110/32]& (1<< (104 % 32));
}
}
But , durring debugging i am seeing the counter is still running and FTM0->CNT still increment . I want that it stop.
Could you please , help me here. actually i am little bit confuse which bit should use to stop the FTM0 Module after serving the interrupt.
Thanks!
