求助各位大大
mcu使用--dsPIC33EV64GM104
編譯器用 XC16-v1.6 + MPLAB X v5.3

最近想用input capture做寬範圍的轉速偵測(0~99999RPM),
想用33EV的2個16bit input capture級連成32bit的input capture,不用中斷的方式處理capture信號,想用scan的方式偵測捕捉溢位(ICOV)再來計算轉速,經debug測試當buffer滿及IC1TMR由0xfff跳至0時老是跳出 Target Halted,因沒啟動IC1中斷,查過技術文件無相關資料,故求助各位.不知是何原因
以下是我重作的1個小的測試程式,問題仍然相同,


#include "xc.h"
#include "p33EV64GM104.h"

struct two_word
{ unsigned long low:16;
unsigned long hi:16;
};

union long_data
{ unsigned long all;
struct two_word word;
};

union long_data icdata1,icdata2;
unsigned int Ic1Fifo[5],Ic2Fifo[5];
int aa;

main(void)
{
// FRCDIV FRC/1; PLLPRE 7; DOZE 1:1; PLLPOST 1:2; DOZEN disabled; ROI disabled;
CLKDIV = 0x0005;
// TUN Center frequency;
OSCTUN = 0x00;
// ROON disabled; ROSEL FOSC; RODIV 0; ROSSLP disabled;
REFOCON = 0x00;
// PLLDIV 112; 0x70=112 = *114 multiple
PLLFBD = 0x70;
// AD1MD enabled; PWMMD enabled; T3MD enabled; T4MD enabled; T1MD enabled; U2MD enabled; T2MD enabled; U1MD enabled; SPI2MD enabled; SPI1MD enabled; C1MD enabled; T5MD enabled; I2C1MD enabled;
PMD1 = 0x00;
// IC4MD enabled; IC3MD enabled; OC1MD enabled; IC2MD enabled; OC2MD enabled; IC1MD enabled; OC3MD enabled; OC4MD enabled;
PMD2 = 0x00;
// CMPMD enabled;
PMD3 = 0x00;
// CTMUMD enabled; REFOMD enabled;
PMD4 = 0x00;
// PWM2MD enabled; PWM1MD enabled; PWM3MD enabled;
PMD6 = 0x00;
// DMA0MD enabled;
PMD7 = 0x00;
// DMTMD enabled; SENT2MD enabled; SENT1MD enabled;
PMD8 = 0x00;
// CF no clock failure; NOSC FRCPLL; CLKLOCK unlocked; OSWEN Switch is Complete;
__builtin_write_OSCCONH((unsigned char) (0x01));
__builtin_write_OSCCONL((unsigned char) (0x01));
// Wait for Clock switch to occur
while (OSCCONbits.OSWEN != 0);
while (OSCCONbits.LOCK != 1);

//----------------------pps set----------------
__builtin_write_OSCCONL(OSCCON & 0xbf); // unlock PPS ,unlock i/o lock

RPINR7bits.IC1R=0x27; //RP39 PIN CONFIGURE TO IC1 ,RP39 39=0X27

__builtin_write_OSCCONL(OSCCON | 0x40); // lock PPS

//-----------------------t2 init----------------------
/* ensure Timer 2 is in reset state */
T2CON = 0;

/* set Timer2 interrupt priority level to 4 */
IPC1bits.T2IP = 4;

/* reset Timer 2 interrupt flag */
IFS0bits.T2IF = 0;

/* disable Timer 2 interrupt */
IEC0bits.T2IE = 0;



/* set Timer 1 period register */
T2CONbits.TCS=0; //TCS=CLOCK SOURCE, 0=FOSC/2, 1= EXIT TxCK PIN INPUT
T2CONbits.TCKPS=3; //預分頻 3=256, 0=1, 1=8, 2=64, 3=256
// PR2=0xffff;

//----------------ic1 set--------------------------
TRISBbits.TRISB7=1; //set ic2 input pin -> input
CNPUBbits.CNPUB7=1;


IFS0bits.IC1IF = 0; // Clear the IC1 interrupt status flag
IEC0bits.IC1IE = 0; // disable IC1 interrupts
// IPC0bits.IC1IP = 4; // Set module interrupt priority as 1

IC1CON1bits.ICTSEL=0b001; //use timer 2
IC1CON1bits.ICI=0b11; //4 times input capture ,interrupt once

IC1CON2bits.IC32=0; //ic1 16bit ic
IC1CON2bits.ICTRIG=1; //1; //set ic1 TRIGSTAT to tigger mode
IC1CON2bits.SYNCSEL=0; //0b10101; //0; //ic1 no tigger source

IC1CON1bits.ICM=4;
T2CONbits.TON=1;
IC1CON2bits.TRIGSTAT=1;

while (1)
{ if(IC1CON1bits.ICOV) //IC1 capture overflow
{ aa=0;
IC1CON2bits.TRIGSTAT=0; //tigger rest, timer 2 =0
// IC2CON2bits.TRIGSTAT=0; //tigger rest, timer 2 =0

while (IC1CON1bits.ICBNE) { Ic1Fifo[aa]=IC1BUF;aa++;}; // Ic2Fifo[ica]=IC2BUF; ica++;}; //when ICBNE=1 read buffer data
IC1CON1bits.ICM=0; // rest IC1TMR

while( aa==4)
{ icdata1.word.low=Ic1Fifo[0]; //4 rising capture once ,
icdata1.word.hi= Ic2Fifo[0]; //3 counter of capture is 12 pcs of rising ,
icdata2.word.low=Ic1Fifo[3];
icdata2.word.hi=Ic2Fifo[3];
};
IC1CON1bits.ICM=4; //ic1 start
IC1CON2bits.TRIGSTAT=1;
};





};

return 0;
}