pic18 - main 関数は理由もなく繰り返されます

Question

こんにちはみんな助けてください... void main() 関数が while ループなしで繰り返し続ける理由がわかりません。LCD には、最初に「IN PROGRESS」(ステータス 1) が表示され、次に「IDLE MODE」(ステータス 2) が表示され、500ms の遅延の後、「IN PROGRESS」(ステータス 1)、「IDLE MODE」(ステータス 2) が繰り返し表示され、「SPI MODE」は表示されません。 (status3). 何が起こっているのかわかりません. マイクロコントローラ自体がリセットされている可能性があります. 助けていただければ幸いです. 私はC18コンパイラでMPLAB IDEv8.92を使用しています.よろしくお願いします.

#include <p18f4550.h>
#pragma config WDT = OFF
#define SCK LATBbits.LATB1              //Pin34 as Output
#define SDA PORTBbits.RB0               //Pin33 as Input
#define CS LATCbits.LATC2               //Pin17 as Output
#define SDO LATCbits.LATC7              //Pin26 as Output
#define LD LATD                         
#define RS LATEbits.LATE1
#define E LATEbits.LATE2
void cmdwrite(unsigned char);
void datawrite(unsigned char);
void strdis(unsigned char *str);
void initialize_SDC(void);
void ms_delay(void);
void msd(void);
void dis2digit(unsigned int var3);
void main()
    {
        unsigned char status1[20]="IN PROGRESS";
            SSPSTATbits.SMP=1;
            SSPSTATbits.CKE=0;
            SSPCON1=0x22;
            SSPCON1bits.SSPEN = 1;
            ms_delay();ms_delay();
            TRISBbits.TRISB1=0;                     //Pin34(SCK) as Output
            TRISBbits.TRISB0=1;                     //Pin33(SDA) as Input
            TRISCbits.TRISC2=0;                     //Pin17(CS) as Output
            TRISCbits.TRISC7=0;                     //Pin26(SDO) as Output
            TRISD=0;
            ADCON1=0x0F;
            TRISE=0;
            E=0;
            CS=1;
            cmdwrite(0x38);
            cmdwrite(0x38);
            cmdwrite(0x38);
            cmdwrite(0x0C);
            cmdwrite(0x82);
            strdis(status1);        //Displays IN PROGRESS
            initialize_SDC();
    }
void initialize_SDC(void)
    {
        unsigned char status2[20]="IDLE MODE";
        unsigned char status3[20]="SPI MODE";
        unsigned char i=0,j=0,r1=0xFF,high=0xFF,ar1=0xFF,spi_r1=0xFF;
        unsigned char cmd0[6]={0x40,0x00,0x00,0x00,0x00,0x95};      // CMD0
        unsigned char cmd1[6]={0x40,0x00,0x00,0x00,0x00,0x95};
        unsigned char cmd55[6]={0x77,0x00,0x00,0x00,0x00,0x01};
        unsigned char acmd41[6]={0x69,0x00,0x00,0x00,0x00,0x01};
        for(i=0;i<10;i++)
            {
                CS=1;
                SDO=high;       //Warming Up Card by sending 80 Clock Pulses
            }
            CS=0;
        if(r1==0xFF)
        {   
            for(j=0;j<6;j++)
            {
                SDO=cmd0[j];        // Sending CMD0
            }
                SDO=high;
                r1=SDA;             //Keep Sending Dummy Bytes until 0x01 is received
            CS=1;
            if(r1==0x01)
            {
            cmdwrite(0x01);
            cmdwrite(0x83);
            strdis(status2);        //Displays IDLE MODE if the response is valid
            msd();msd();
            }
        }   

        CS=1;
        CS=0;
        while(ar1==0xFF)
        {
        SDO=high;
        for(j=0;j<6;j++)
            {
                SDO=cmd1[j];        // Sending CMD0
            }
                SDO=high;
                ar1=SDA;                //Keep Sending Dummy Bytes until 0x01 is received
                CS=1;
            if(ar1==0x00)
            {
            cmdwrite(0x01);
            cmdwrite(0x83);
            strdis(status3);        //Displays IDLE MODE if the response is valid
            msd();msd();
            }
        }
        /*for(i=0;i<6;i++)  
        {
            SDO=cmd55[i];           //CMD55
        }
        SDO=high;                   //Send dummy byte
        ar1=SDA;                    //Get Response for CMD55
            if(ar1=0x00)            //Check if Response(R1) is valid
            {
                CS=1;
                CS=0;
                for(i=0;i<6;i++)
                {
                    SDO=acmd41[i];      //ACMD41
                }
            SDO=high;                   //Send dummy byte
            spi_r1=SDA;                 //Get Response for ACMD41
            if(spi_r1==0x00)            //Check if Response(R1) is valid
            {
                cmdwrite(0x01);
                cmdwrite(0x88);
                strdis(status3);        //Displays SPI MODE if the response is valid
                msd();msd();
            }
            CS=1;
            }*/
    }
void cmdwrite(unsigned char var1)
{
LD=var1;
RS=0;
/*RW is grounded */
E=1;
ms_delay();
E=0;
}
void datawrite(unsigned char var2)
{
LD=var2;
RS=1;
/*RW is grounded */
E=1;
ms_delay();
E=0;
}
void strdis(unsigned char *str)
{
        while(*str!='\0')
        {
        datawrite(*str);
        str++;
        }
}
void dis2digit(unsigned int var3)
{
     unsigned int hp,up,tp,x;
     x=var3/10;
     hp=x/10;
     tp=x%10;
     up=var3%10;
     datawrite(hp+48);
     datawrite(tp+48);
     datawrite(up+48);
}
void ms_delay(void)
{
T1CON = 0x30;
TMR1H=0xC2;
TMR1L=0xF7;
T1CONbits.TMR1ON=1;
while(PIR1bits.TMR1IF==0);
T1CONbits.TMR1ON=0;
PIR1bits.TMR1IF=0;
}
void msd(void)
{
T1CON = 0x30;
TMR1H=0x67;
TMR1L=0x6A;
T1CONbits.TMR1ON=1;
while(PIR1bits.TMR1IF==0);
T1CONbits.TMR1ON=0;
PIR1bits.TMR1IF=0;
}