Capture PWM on a PIC32 Intx pin

[sdecorme]

Hi,
I try to capture aPWM coming on my Int1 pin of my PIC32MX695F512H
when I use this code the interrupt make toggling the led at the right frequency,
but after the first interrupt my main loop crash and never loop again .
Any ideas ?
void Initialize(void)
{
mInit();
OpenTimer23(T2_ON | T2_32BIT_MODE_ON | T2_PS_1_1, 4000000000);
ConfigIntCapture1(IC_INT_ON | IC_INT_PRIOR_6 |IC_INT_SUB_PRIOR_3);
OpenCapture1(IC_INT_1CAPTURE | IC_CAP_32BIT | IC_TIMER2_SRC | IC_EVERY_EDGE |IC_ON );
INTEnableSystemMultiVectoredInt();
mIC1ClearIntFlag();
Vitesse=0;
}


// Input capture interrupt handler
void __ISR(_INPUT_CAPTURE_1_VECTOR, IPL6SRS) InputCapture_Handler(void)
{
mLED_5_Toggle();
mPORTDClearBits(BIT_2);
mIC1ClearIntFlag();
while(!mIC1CaptureReady());
Vitesse = mIC1ReadCapture();
}

Thanks

 

[Jinzpaul4u]

void Initialize(void)
{
mInit();
OpenTimer23(T2_ON | T2_32BIT_MODE_ON | T2_PS_1_1, 4000000000);
ConfigIntCapture1(IC_INT_ON | IC_INT_PRIOR_6 |IC_INT_SUB_PRIOR_3);
OpenCapture1(IC_INT_1CAPTURE | IC_CAP_32BIT | IC_TIMER2_SRC | IC_EVERY_EDGE |IC_ON );
INTEnableSystemMultiVectoredInt();
mIC1ClearIntFlag();
Vitesse=0;
while(1);
}


// Input capture interrupt handler
void __ISR(_INPUT_CAPTURE_1_VECTOR, IPL6SRS) InputCapture_Handler(void)
{
mLED_5_Toggle();
mPORTDClearBits(BIT_2);
mIC1ClearIntFlag();
while(!mIC1CaptureReady());
Vitesse = mIC1ReadCapture();
}

 

[sdecorme]

Hi Jinzpaul4u,
Thanks you but my main loop look like this already

main
{
Initialize()
while(1)
{
Toggle_LED_2();
}
}

So your code looks mine and done works.
my led2 stop to toggle at the first interrupt;

Thanks you

 

[Jinzpaul4u]

Hi There,

// Input capture interrupt handler
void __ISR(_INPUT_CAPTURE_1_VECTOR, IPL6SRS) InputCapture_Handler(void)
{
mLED_5_Toggle();
mPORTDClearBits(BIT_2);
mIC1ClearIntFlag();

while(!mIC1CaptureReady());

Vitesse = mIC1ReadCapture();
}


Please be ensure its coming out from while(!mIC1CaptureReady()); loop or else give small delay in toggle section.

my led2 stop to toggle at the first interrupt;

make sure your code is resetting the interrupt flag bit.

Regards,

 

[sdecorme]

Hi,
Now my main prog run and the Capture interrupt too , here is my code
For the init:
//Clear interrupt flag
mIC1ClearIntFlag();
// Setup Timer 3
OpenTimer3(T3_ON | T1_PS_1_1, 0x0);

// Enable Input Capture Module 1
// - Capture Every edge
// - Enable capture interrupts
// - Use Timer 3 source
// - Capture rising edge first
OpenCapture1( IC_EVERY_EDGE | IC_CAP_16BIT | IC_INT_1CAPTURE | IC_TIMER3_SRC | IC_ON );
ConfigIntCapture1(IC_INT_ON | IC_INT_PRIOR_7 |IC_INT_SUB_PRIOR_3);
mIC1IntEnable(1);
INTEnableSystemMultiVectoredInt();
mIC1ClearIntFlag();

// Input capture interrupt handler
void __ISR(_INPUT_CAPTURE_1_VECTOR, IPL7SRS) InputCapture_Handler(void)
{
Vitesse = mIC1ReadCapture();
mIC1IntEnable(0);
mLED_5_Toggle();
mIC1IntEnable(1);
mIC1ClearIntFlag();
}

But now the problem is that mIC1ReadCapture() is always 0 ?



Edit:

If I change 0x0 to 0xFFFF in the timer config the captured value looks like this for a 50khz PWM
19599
37809
56019
8693
26903
45113
63323
15997
34207
52417
5091
23301
41511
59721

 

[sdecorme]

Finally I've made it like this

OpenTimer45(T45_ON | T45_PS_1_1 | T45_SOURCE_INT,1600000000);
ConfigINT1(EXT_INT_ENABLE | RISING_EDGE_INT | EXT_INT_PRI_7);
SetSubPriorityINT1(EXT_INT_SUB_PRI_3);
EnableINT1;
mINT1ClearIntFlag();
INTEnableSystemMultiVectoredInt();


void __ISR(_EXTERNAL_1_VECTOR, IPL7SRS) InputEncoder_Handler(void)
{
NbBetweenEdge = ReadTimer45();
WriteTimer45(0x00000000);

DisableINT1;
if(InterruptMode == RisingEdge)
{
mINT1SetEdgeMode(FallingEdge);
InterruptMode = FallingEdge;
}
else
{
mINT1SetEdgeMode(RisingEdge);
InterruptMode = RisingEdge;
}
EnableINT1;
}