# Periodic Interrupt Timer Problem

Discussion created by Pogo Lin on Aug 9, 2011
Latest reply on Aug 9, 2011 by kef

I've create three PIT, the folloing list is their setting.

`PITCFLMT_PITFRZ = 1;PITMTLD0 = 79;PITMTLD1 = 159;PITCE_PCE0        = 1;PITMUX_PMUX0   = 0;PITINTE_PINTE0  = 1;//time-out period = (PITMTLDx+1)*(PITLD+1)/fBus = 80*5000/40M = 0.01s = 10ms PITLD0= 4999;PPITTF_PTF0      = 1;PITCE_PCE1      = 1;PITMUX_PMUX1 = 0;PITINTE_PINTE1 = 1;PITLD1               = 499;           //time-out period = (PITMTLDx+1)*(PITLD+1)/fBus = 80*500/40M = 0.001s = 1ms PITTF_PTF1       = 1; PITCE_PCE2      = 1;PITMUX_PMUX2 = 0;PITINTE_PINTE2 = 1;PITLD2= 49999;              //time-out period = (PITMTLDx+1)*(PITLD+1)/fBus = 80*50000/40M = 0.1s = 100msPITTF_PTF2      = 1;#pragma CODE_SEG __NEAR_SEG NON_BANKEDvoid interrupt ISR_PIT0_Scheduler(void){    MeasureTask(); PITTF_PTF0 = 1;}void interrupt ISR_PIT1_Scheduler(void){    SendQueue(); PITTF_PTF1 = 1;}void interrupt ISR_PIT2_Scheduler(void){    HeaterControlTask();  <---I set the break point on this point, but it never stop on it. PITTF_PTF2 = 1;}#pragma CODE_SEG DEFAULT`

Now, I've one problem, the interrupt of PTI2 is not work. When I use BDM and set breakpoint on the PTI2's interrupt function. It never stop on it.  Why the PTI2 can't work? Does anyone can help me? Thansk a lot.

Regards,

Pogo Lin