SD card CRC Ok response in DE4_SDCARD Demo when executing CMD24 Write block command

[Altera_Forum]

Hi everyone 

I am referring to the DE4_SDCARD demo by Altera provided with DE-4 board and working in 1-bit SD mode. When applying a block write operation using command CMD24 for example I am not getting SD card busy status so where after I can check CRC Ok response. I mean to say after applying STOP bit, I assume the card must go busy for writing the data physically but just after applying next clock I am getting high '1' on the DAT0 line which means card is never gone busy for writing. However to my luck the data is also written down successfully but I still want to monitor the response of CRC check after sending STOP bit which I cannot in current scenario.  Please help me, the code snap is given below and problem is highlighted in line ////>>>>>>>>>>>>>>>   // write data (512byte = 1 block)  for(i=0;i<nDataLen;i++)  {  Data8 = szDataWrite[i];  for(j=0;j<8;j++)  {  SD_CLK_LOW;    if (Data8 & 0x80)  SD_DAT_HIGH;  else  SD_DAT_LOW;    SD_CLK_HIGH;  Data8 <<= 1;  }  }   // send CRC  j=0;  for(i=0;i<16;i++){  SD_CLK_LOW;  if (DataCrc16 & 0x8000)  SD_DAT_HIGH;  else  SD_DAT_LOW;    SD_CLK_HIGH;  DataCrc16 <<= 1;   }   // stop bits (value 'one')  SD_CLK_LOW;  SD_DAT_HIGH;  SD_CLK_HIGH;  ////>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Just below code after STOP bit is already sent I am getting 0xff which means only 1's no zero indicating busy for sd card.   //===== check busy bits (data0 only)  SD_DAT_IN; for(i=0; i<8; i++) //wait for response  {  SD_CLK_LOW;  SD_CLK_HIGH;  Response <<= 1;  if(SD_TEST_DAT) Response|=0x01;  }  printf("Response is: 0x%02x\n", Response); //Prints always 0xff   Please help me come out from this problem so I can check the CRC ok response on DAT0 line after STOP bit