Hi,
I am developing PIT interrupt on mpc564xa kit.
The problem is that PIT interrupt never happen.
Can someone help me solve this?
TKS.
#include "MPC5644A.h"
void Pit0ISR(void);
void initINTC(void) {
/* Use one the following two lines */
/*INTC.MCR.B.HVEN_PRC0 = 1;*//* MPC551x: initialize Proc'r 0 for HW vector mosde */
INTC.MCR.B.HVEN = 1; /* MPC555x: initialize Proc'r 0 for HW vector mosde */
}
void enableIrq(void) {
/* Use one of the following two lines to lower the INTC current priority */
//INTC.CPR_PRC0.B.PRI = 0; /* MPC551x: Lower INTC's current priority */
INTC.CPR.B.PRI = 0; /* MPC555x: Lower INTC's current priority */
asm(" wrteei 1"); /* Enable external interrupts */
}
int ii =0;
void Pit0ISR(void) {
ii++;
PIT.TIMER[0].TFLG.B.TIF = 1; /* MPC56xxP/B/S: CLear PIT 1 flag by writing 1 */
}
int main(void) {
volatile int i = 0;
FMPLL.ESYNCR1.B.EMODE = 1;
FMPLL.ESYNCR1.B.CLKCFG = 7;
FMPLL.ESYNCR1.B.EPREDIV = 8;
FMPLL.ESYNCR1.B.EMFD = 80;
FMPLL.ESYNCR2.B.ERFD = 4;
//while (FMPLL.SYNSR.B.LOCK != 1) {};
SIU.SYSDIV.B.SYSCLKDIV = 1;
//FMPLL.ESYNCR1.B.CLKCFG = 0X7; /* Change clk to PLL normal mode from crystal */
//FMPLL.SYNCR.R = 0x16080000; /* 8 MHz xtal: 0x16080000; 40MHz: 0x46100000 */
//while (FMPLL.SYNSR.B.LOCK != 1) {}; /* Wait for FMPLL to LOCK */
//FMPLL.SYNCR.R = 0x16000000; /* 8 MHz xtal: 0x16000000; 40MHz: 0x46080000 */
//SIU.SYSCLK.B.SYSCLKSEL = 2;
//----------disable watchdog--------------
SWT.SR.R = 0xC520;
SWT.SR.R = 0xD928;
SWT.MCR.B.WEN = 0;
//-----------------------------------------
PIT.PITMCR.B.MDIS = 0;
PIT.TIMER[0].LDVAL.R = 0x00FF; // setup timer 1 for 256000 cycles
PIT.TIMER[0].TCTRL.B.TIE = 1;
PIT.TIMER[0].TCTRL.B.TEN = 1;
INTC.PSR[301].R = 1; //for timer0
initINTC(); /* Initialize INTC for hardware vector mode */
INTC_InitINTCInterrupts(); // Init interrupts
INTC_InstallINTCInterruptHandler(Pit0ISR, 301, 1);
enableIrq();
/* Loop forever */
for (;;) {
i++;
}
}
