Hi,
I am using F28035 for my project.
I've configured the output of the comparator 3 to trigger a tripzone on ePWM6 when COMP3OUT is in the low state. It works fine, i saw the ewpm6 output change according to the COMP3OUT value.
The problem is that i use others interrupts including one to blink a led every 100ms using CPUTimer1 and when the COMP3OUT is in low state, the led stop blinking just like the interrupt did not happen. I don't understand why ...
Comparator and Epwm6 configuration :
EALLOW; /* Configure comparator */ Comp3Regs.COMPCTL.bit.COMPDACEN = 1; /* Power up Comparator 1 locally */ Comp3Regs.COMPCTL.bit.COMPSOURCE = 0; /* Connect the inverting input to the internal DAC */ Comp3Regs.DACVAL.bit.DACVAL = 512; /* Set DAC output to middle range */ /* Configure Epwm event when trip */ /* Define an event (DCAEVT1) based on DC_COMP3OUT */ EPwm6Regs.DCTRIPSEL.bit.DCALCOMPSEL = DC_COMP3OUT; /** DCAL = Comparator 3 output */ EPwm6Regs.TZDCSEL.bit.DCAEVT1 = TZ_DCAL_LOW; /** DCAEVT1 = DCAL low (will become active as Comparator output goes low) */ EPwm6Regs.DCACTL.bit.EVT1SRCSEL = DC_EVT1; /** DCAEVT1 = DCAEVT1 (not filtered) */ EPwm6Regs.DCACTL.bit.EVT1FRCSYNCSEL = DC_EVT_ASYNC; /** Take async path */ EPwm6Regs.TZSEL.bit.DCAEVT1 = 1; /** DCAEVT1 events can force EPWM6A */ EPwm6Regs.TZCTL.bit.TZA = TZ_FORCE_HI; /** EPWM6A will go high */ /** Enable TZ interrupt */ EPwm6Regs.TZEINT.bit.OST = 1; /** Define an event (DCBEVT1) based on DC_COMP3OUT */ EPwm6Regs.DCTRIPSEL.bit.DCBHCOMPSEL = DC_COMP3OUT; /** DCBL = Comparator 3 output */ EPwm6Regs.TZDCSEL.bit.DCBEVT1 = TZ_DCBH_LOW; /** DCBEVT1 = DCBL low (will become active as Comparator output goes low) */ EPwm6Regs.DCBCTL.bit.EVT1SRCSEL = DC_EVT1; /** DCBEVT1 = DCBEVT1 (not filtered) */ EPwm6Regs.DCBCTL.bit.EVT1FRCSYNCSEL = DC_EVT_ASYNC; /** Take async path */ EPwm6Regs.TZSEL.bit.DCBEVT1 = 1; /** DCBEVT1 events can force EPWM6B */ EPwm6Regs.TZCTL.bit.TZB= TZ_FORCE_HI; /** EPWM6B will go low */ /** Enable TZ interrupt */ EPwm6Regs.TZEINT.bit.OST = 1;
epwm6_isr :
interrupt void Epwm6Tripzone
(
void
)
{
EPwm6TZIntCount++;
EALLOW;
EPwm6Regs.TZCLR.bit.OST = 1; /** One Shot trip */
EPwm6Regs.TZCLR.bit.INT = 1; /** Clear Tripzone Interrupt */
EDIS;
PieCtrlRegs.PIEACK.all = 0x03; /** Issue PIE ACK */
}
cpuTimer1 isr :
interrupt void Timer1Tasks
(
void
)
{
EALLOW;
CpuTimer1.InterruptCount++;
EDIS;
Blinkled();
}
setupInterrupt:
void setupInterrupts
(
void
)
{
EALLOW;
/* CPU Timer interrupt */
PieVectTable.TINT1 = &Timer1Tasks;
PieVectTable.TINT2 = &Timer2Tasks;
/* Trip Zone interrupt */
PieVectTable.EPWM6_TZINT = &Epwm6Tripzone;
PieCtrlRegs.PIEIER2.bit.INTx6 = 1;
/* SPI interrupt */
PieVectTable.EPWM1_INT = &Spi; /** Map Interrupt */
PieCtrlRegs.PIEIER3.bit.INTx1 = 1u; /** PIE level enable, Grp3 / Int1 */
EPwm1Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO; /** INT on PRD event */
EPwm1Regs.ETSEL.bit.INTEN = 1u; /** Enable INT */
EPwm1Regs.ETPS.bit.INTPRD = ET_3RD; /** Generate INT on every 3 event */
/* calcul interrupt */
PieVectTable.EPWM2_INT = &calcul; /** Map Interrupt */
PieCtrlRegs.PIEIER3.bit.INTx2 = 1u; /** PIE level enable, Grp3 / Int2 */
EPwm2Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO; /** INT on PRD event */
EPwm2Regs.ETSEL.bit.INTEN = 1u; /** Enable INT */
EPwm2Regs.ETPS.bit.INTPRD = ET_3RD; /** Generate INT on every event */
IER |= M_INT2; /** Enable CPU INT2 connected to EPWM1-6 XINTs */
IER |= M_INT3 ; /** Enable CPU INT3 connected to EPWM1-6 INTs */
IER |= M_INT13; /** Enable CPU INT13 connected to CPU_Timer_1 */
IER |= M_INT14; /** Enable CPU INT14 connected to CPU_Timer_2 */
EINT; /** Enable Global interrupt INTM */
ERTM; /** Enable Global realtime interrupt DBGM */
EDIS;
}
I guess it's a problem of interruptions or maybe tripzone event configuration but I can not find where the problem is ..
Thanks,
Stanis
