【求助】MPC5604P中断问题

霹雳小猪 · 发表于 2014-11-18 14:18:12

本帖最后由霹雳小猪于 2014-11-18 14:43 编辑

对MPC5604P中断不是很了解，参考资料写了个PIT中断来点亮LED，可是就是无法正常工作，求大神帮忙！

#include "MPC5604P_M26V.h"

unsigned char Time_Flag = 0;
unsigned char LED_Flag  = 0;

void Init_Mode_Clock(void)
{
ME.MER.R = 0x0000001D; /* Enable DRUN, RUN0, SAFE, RESET modes */

/* Initialize PLL before turning it on */
CGM.CMU_0_CSR.R = 0x000000004; /*Monitor FXOSC > FIRC/4 (4MHz); no PLL monitor */
CGM.FMPLL[0].CR.R = 0x02400100; /* 8 MHz xtal: Set PLL0 to 64 MHz */
ME.RUN[0].R = 0x001F0074; /* RUN0 cfg: 16MHzIRCON,OSC0ON,PLL0ON,syclk=PLL0*/

ME.PCTL[92].R = 0x01; /* PIT, RTI: select ME_RUN_PC[1] */
ME.RUNPC[1].R = 0x00000010; /* Peri. Cfg. 1 settings: only run in RUN0 mode */

/* Enter RUN0 mode: */
ME.MCTL.R = 0x40005AF0; /* Enter RUN0 Mode & Key */
ME.MCTL.R = 0x4000A50F; /* Enter RUN0 Mode & Inverted Key */

while (ME.GS.B.S_MTRANS == 1) {} /* Wait for mode transition to complete */
/* Notes: */
/* 1. I_TC IRQ could be used here instead of polling */
/* to allow software to complete other init. */
/* 2. A timer could be used to prevent waiting forever*/
while(ME.GS.B.S_CURRENTMODE != 4) {} /* Verify RUN0 is the current mode */
/* Note: This verification ensures a SAFE mode */
/* tranistion did not occur. SW could instead */
/* enable the safe mode tranision interupt */
}

void Disable_Watchdog(void)
{
SWT.SR.R = 0x0000c520; /* Write keys to clear soft lock bit */
SWT.SR.R = 0x0000d928;
SWT.CR.R = 0x8000010A; /* Clear watchdog enable (WEN) */
}

void Init_PIT(void)
{
PIT.PITMCR.R    = 0x00000001; /* Enable PIT Timers Clock,Timers continue to run in debug mode*/
/* Timer 0 */
PIT.CH[0].LDVAL.R = 0x03D09000; /* 64Mhz--->100ms */
PIT.CH[0].TCTRL.R = 0x00000003; /* Timer Interrupt&Timer Enable */

INTC.PSR[59].R    = 0x05; /* PIT 0 interrupt vector with priority 1 */
}

void PIT1_ISR(void)
{
PIT.CH[0].TFLG.B.TIF = 1;

if(Time_Flag < 5) Time_Flag++;
else
{
if(LED_Flag == 0) LED_Flag = 1;
else LED_Flag = 0;
Time_Flag = 0;
}
}

void Init_INTC(void)
{
    INTC_InstallINTCInterruptHandler(PIT1_ISR, 59, 5);    /*将PIT0 ISR安装到中断向量表中*/

    INTC.MCR.B.HVEN = 0; /* Single core: initialize for HW vector mode */
    INTC.MCR.B.VTES = 0;                                  /* Use default vector table 4B offsets */
}

void Init_Port(void)
{
SIU.PCR[52].B.PA  = 0;
SIU.PCR[53].B.PA  = 0;
SIU.PCR[54].B.PA  = 0;
SIU.PCR[55].B.PA  = 0;

SIU.PCR[52].B.OBE  = 1;
SIU.PCR[53].B.OBE  = 1;
SIU.PCR[54].B.OBE  = 1;
SIU.PCR[55].B.OBE  = 1;

SIU.GPDO[52].R = 1; //
SIU.GPDO[53].R = 1;
SIU.GPDO[54].R = 1;
SIU.GPDO[55].R = 1;
}

void Enable_IRQ(void)
{
INTC.CPR.B.PRI = 0; /* Single Core: Lower INTC's current priority */
asm(" wrteei 1"); /* Enable external interrupts */
}

int main(void)
{
Init_Mode_Clock();
Disable_Watchdog();
    Init_PIT();
   Init_INTC();
   Init_Port();
Enable_IRQ();

  /* Loop forever */
  for (;;)
  {
if(LED_Flag == 0)
{
SIU.GPDO[52].R = 0; //
SIU.GPDO[53].R = 0;
SIU.GPDO[54].R = 1;
SIU.GPDO[55].R = 1;
}
else
{
SIU.GPDO[52].R = 1; //
SIU.GPDO[53].R = 1;
SIU.GPDO[54].R = 0;
SIU.GPDO[55].R = 0;
}
  }
}

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