problem when i debug CF card

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nios2-terminal: There are no JTAG UARTs available which match the --device and 

nios2-terminal: --instance options you provided.  what is the problem?how to solve it? thx v much   my software : # include "alt_types.h"# include <stdio.h># include <unistd.h># include "system.h"# include "sys/alt_irq.h" //#include "altera_avalon_pio_regs.h"# include "altera_avalon_cf_regs.h"# include "altera_avalon_cf.h" alt_u8 data[512]; alt_u8 flag1,flag2;  //parameter setting //lba2:sector number,lba3:adr0-7,lba4:adr8-15,lba5:adr16-23 //lba6:set lba addressing & lba:adr24-27 void busy_check(void) {alt_u8 temp; temp=IORD_ALTERA_AVALON_CF_IDE_STATUS(CF_0_IDE_BASE); while(temp&0x50!=0x50)  ; } void set_para(alt_u8 comm,alt_u8 lba2,alt_u8 lba3,alt_u8 lba4,alt_u8 lba5,alt_u8 lba6)   {//set sector number  busy_check();  IOWR_ALTERA_AVALON_CF_IDE_SECTOR_COUNT(CF_0_IDE_BASE, 1);  //set lba3:adr0-7  busy_check();  IOWR_ALTERA_AVALON_CF_IDE_SECTOR_NUMBER(CF_0_IDE_BASE, lba3);   //set lba4:adr8-15  busy_check();  IOWR_ALTERA_AVALON_CF_IDE_CYLINDER_LOW(CF_0_IDE_BASE, lba4);  //set lba5:adr16-23  busy_check();  IOWR_ALTERA_AVALON_CF_IDE_CYLINDER_HIGH(CF_0_IDE_BASE, lba5);  //set cf card as LBA ADDRESSING&lba:adr24-27   busy_check(); IOWR_ALTERA_AVALON_CF_IDE_DEVICE_HEAD(CF_0_IDE_BASE, lba6); // write commond 0x30 to cf card  busy_check(); IOWR_ALTERA_AVALON_CF_IDE_COMMAND(CF_0_IDE_BASE, comm); } //write data to cf card  void wr_data(void)  {alt_u16 i,ptr;  alt_u8 temp;  for(i=0;i<512;i++)  data[i]=i;    for(ptr=0;ptr<512;ptr++)  {busy_check();  IOWR_ALTERA_AVALON_CF_IDE_DATA(CF_0_IDE_BASE, data[ptr]);   }   } //read data from cf card void rd_data(void) {alt_u16 i,ptr;  alt_u8 temp;  for(ptr=0;ptr<512;ptr++)  { busy_check();  temp=IORD_ALTERA_AVALON_CF_IDE_DATA(CF_0_IDE_BASE);  printf("*****%c*****",temp);  }    }    int main(void) {  alt_u8 present; //-------------------------------------------------------------- //Copact FLash presence checking //-------------------------------------------------------------- //alt_avalon_ide_cf_init(CF_0_CTL_BASE ); present=IORD_ALTERA_AVALON_CF_IDE_STATUS(CF_0_IDE_BASE); if(present != 0) { printf("Waiting for the Compact Flash Card to be inserted ......\n"); } /* while(present != 0) { present =IORD_ALTERA_AVALON_CF_IDE_STATUS(CF_0_IDE_BASE); printf(""); }  printf("\nCompact Flash is detected ......\n"); */ //Power the device IOWR_ALTERA_AVALON_CF_IDE_CTL(CF_0_CTL_BASE, 0x2) ;   //write a 512bytes to a sector of the cf card set_para(0x30,1,1,0,0,0xe0); wr_data(); set_para(0x20,1,1,0,0,0xe0); rd_data();  IOWR_ALTERA_AVALON_CF_IDE_CTL(CF_0_CTL_BASE, 0x0) ; printf(" \n\n --------------------------------------------\n"); printf(" Now it&#39;s safe to remove the CompactFlash Card\n"); printf(" --------------------------------------------\n\n");   return (0); }