I have a TWR-K70F120M: kinetis k70 120MHz Tower System Module.
I have connected a elettric signal to PORTB and i have connected e isr handler to signal transition.
Electric signal
_____ ______ ______
| | | | | |
__| |_____| |_____| |_____ ------> PORTB
( 1 ) ( 2 ) ( 3 )
Interrupt handler is called every transition of the elettric signal ( in the figure is 1,2,3 ).
The interrupt handler is the follow code:
#define EN_ERR_SCHEDULER_INT_TOO_LONG (10)
static bool wbFlag = false; /* control the reentrant function */
__ isr void isr_handler( void )
{
/* l'interrupt precedente è durato troppo ? */
if ( wbFlag != true )
{
/* flag reentrant function */
wbFlag = TRUE;
}
else
{
vDebugPrint( EN_ERR_SCHEDULER_INT_TOO_LONG );
}
while(1);
wbFlag = false;
}
at the step ( 1 ) the program jump to the handler but not in the 2nd e third impulse. Is it possible to enable a reentrand interrupt in kinetis k70?
the setup is follow ( setup is call one time at the startup of the system ):
sllRq = 88; /*Port control module Pin Detect (Port B) */
| void vEnableIrq (SLONG slIRQ) |
{
SLONG slDiv;
/* Make sure that the IRQ is an allowable number. Right now up to 91 is
* used.
*/
if ( slIRQ > 91 )
{
vDebugPrint("\nERR! Invalid IRQ value passed to enable irq function!\n");
}
/* Determine which of the NVICISERs corresponds to the irq */
slDiv = ( slIRQ / 32 );
switch ( slDiv )
{
case 0x0:
NVICICPR0 = 1 << ( slIRQ % 32 );
NVICISER0 = 1 << ( slIRQ % 32 );
break;
case 0x1:
NVICICPR1 = 1 << ( slIRQ % 32 );
NVICISER1 = 1 << ( slIRQ % 32 );
break;
case 0x2: /* program execute this case !!!!! */
NVICISER2 = 1 << ( slIRQ % 32 );
NVICICPR2 = 1 << ( slIRQ % 32 );
PORTB_PCR18 |= PORT_PCR_ISF(0) | PORT_PCR_IRQC(9) | PORT_PCR_MUX(1);
NVICIP88 = 0x00;
break;
}
}
I need to control the reentrant interrupt because this application must check the excessive duration of the code in isr handler.
