Problem with entering ISR
2006-05-29 by federr65
I'm just starting with LPC ( I have a LPC-H2138 board from Olicom) and
at the beginning I'm unable to solve the following problem:
I have an Timer0 set to generate interrupts. Timer works just fine,
but I can't force the ISR to execute.
Below is my code:
#include <targets/LPC213x.h>
#define LED 0xF0000000;
static int timer0Count, timer1Count;
int marker=1;
static void PLL_Init(void)
{
PLLCON=0x00000003; //Kwarc razy 4
PLLCFG = 0x23;
PLLFEED = 0xAA;
PLLFEED = 0x55;
}
void inititate (void)
{
//PLL_Init();
//MAMCR = 2;
IO0PIN=0x0;
IO1PIN=0x0;
IO0DIR = 0xFFFFFFFF;
IO1DIR = 0xFFFFFFFF;
}
static void timer0ISR(void) __attribute__ ((interrupt ("IRQ")));
static void timer0ISR(void)
{
if (IO0PIN=0)
{
IO0SET=LED;
}
else
{
IO0CLR=0;
}
/* Clear the timer 0 interrupt */
T0IR = 0xFF;
/* Update VIC priorities */
VICVectAddr = 0;
marker++;
}
int main(void)
{
inititate();
// Timer 0 interrupt is an IRQ interrupt, none is FIQ */
VICIntSelect =0x0;
/* Clear all IRQ and Enable timer 0 interrupt */
VICIntEnClr = 0xFFFFFFFF;
VICIntEnable = 0x10;
/* Use slot 0 for timer 0 interrupt and enable it (bit5)*/
VICVectCntl0 = 0x24;
/* Set the address of ISR for slot 0 */
VICVectAddr0 = (unsigned int)timer0ISR;
/* Match 0 reset - mo¿e nie byæ konieczne do dzia³ania*/
T0IR = 0x1;
/* Reset and stop timer 0 */
T0TCR = 0x2;
/* Set the timer 0 prescale counter */
T0PR = 0x0;
/* Set timer 0 match register */
/* Set timer 0 match register */
T0MR0 = 0xffff;
/* Generate interrupt and reset counter on match */
T0MCR = 0x3;
/* Start timer 0 */
T0TCR = 1;
/* Enable Interrupts */
// __ARMLIB_enableIRQ();
while(1);
}