hello all,

i am trying to connect micro sd card with pic18f4520 using mikroC.
but i have ready module of micro sd card socket with required push-pull and pulled down resisters.but i am not able to detect sd card.

i have attached my code below please give me solution as soon as fast.
thanks

// MMC module connections
sbit Mmc_Chip_Select           at LATC0_bit;  // for writing to output pin always use latch (PIC18 family)
sbit Mmc_Chip_Select_Direction at TRISC0_bit;
// eof MMC module connections

const LINE_LEN = 43;
char err_txt[20]       = "FAT16 not found";
char file_contents[LINE_LEN] = "XX MMC/SD FAT16 library by Anton Rieckertn";
char           filename[14] = "MIKRO00x.TXT";          // File names
unsigned short loop, loop2;
unsigned long  i, size;
char           Buffer[512];


void M_Create_New_File()
{
  filename[7] = 'A';
  Mmc_Fat_Set_File_Date(2010, 4, 19, 9, 0, 0); // Set file date & time info
  Mmc_Fat_Assign(&filename, 0xA0);          // Find existing file or create a new one
  Mmc_Fat_Rewrite();                        // To clear file and start with new data
  for(loop = 1; loop <= 99; loop++) 
  {
    UART1_Write('.');
    file_contents[0] = loop / 10 + 48;
    file_contents[1] = loop % 10 + 48;
    Mmc_Fat_Write(file_contents, LINE_LEN-1);   // write data to the assigned file
  }
}

void main() {
  #define COMPLETE_EXAMPLE         // comment this line to make simpler/smaller example
  ADCON1 |= 0x0F;                  // Configure AN pins as digital
  CMCON  |= 7;                     // Turn off comparators
  
  // Initialize UART1 module
 // UART1_Init(19200);
  Delay_ms(10);

 // UART1_Write_Line("PIC-Started"); // PIC present report

  // Initialize SPI1 module
  SPI1_Init_Advanced(_SPI_MASTER_OSC_DIV64, _SPI_DATA_SAMPLE_MIDDLE, _SPI_CLK_IDLE_LOW, _SPI_LOW_2_HIGH);
  
  // use fat16 quick format instead of init routine if a formatting is needed
  if (Mmc_Fat_Init() == 0) {
    // reinitialize spi at higher speed
    SPI1_Init_Advanced(_SPI_MASTER_OSC_DIV4, _SPI_DATA_SAMPLE_MIDDLE, _SPI_CLK_IDLE_LOW, _SPI_LOW_2_HIGH);
    //--- Test start
    UART1_Write_Line("Test Start.");
    //--- Test routines. Uncomment them one-by-one to test certain features
    M_Create_New_File();
}

 

Does your PIC not require any configuration bits?

Does your code not require any included files?

Don't you need to initialize the SDI interface?

Does you code show any signs of working at all?