Pic24 MMC Karte Response Fehler

void main(void)

{

  short i,f;

  // Configure Oscillator to operate the device at 80MHz

  // Fosc= Fin*M/(N1*N2), Fcy=Fosc/2

  // Fosc= 4M*80(2*2)=80Mhz for 4M input clock

// RM_FJ

  CLKDIV = 0;    // Teilung durch 1

  OSCTUN = 0; // Tune FRC oscillator, if FRC is used

  Delay(10);  

//  OSCCONbits.NOSC = 1;  // Switch to PLL mode

    asm ("mov #0x01, w3");

    asm ("mov #0x78, w0");

    asm ("mov #0x9A, w1");

    asm ("mov #_OSCCON+1, w2");

    asm ("mov.b w0, [w2]");

    asm ("mov.b w1, [w2]");

    asm ("mov.b w3, [w2]");

    asm ("mov #0x46, w0");

    asm ("mov #0x57, w1");

    asm ("mov #_OSCCON, w2");

    asm ("mov.b w0, [w2]");

    asm ("mov.b w1, [w2]");

    asm ("mov.b w3, [w2]");

  while(OSCCONbits.OSWEN) {}; // Wait for PLL to lock

  RCONbits.WDTO = 0;    // Reset Watch Dog Timer Timeout Flag

  RCONbits.SWDTEN = 1; // Enable SW controlled Watch Dog Timer

  // SDO1 SDKARTE

  // Pin 29-32 SPI1  

  // Pin 29 ist CS: Output RB14 

  // Pin 30 ist SDO SPI1 Data out also RP29 RPOR14 high auf 7 einstellen

  RPOR14 = 0x0700; // RP29 Pin 30

  // Pin 31 ist SDA also RP10 auf INPUT SPI1 einstellen

  // vorher: //RPINR19 = 0x000A;//10;    // UART2 RX : RP10 für U2RX gewählt ist Pin 31

  RPINR20 = 10; // RP10 ist SDI1 ist Pin 31

  // Pin 32 ist SCL also RP17 RPnR auf 8 einstellen

  RPOR8  = 0x0800;  // SPI1 Clock: Pins RP17=Pin32

    AD1PCFG = 0xFFFF; //Analoge Ports alle deaktiviert

  TRISB = 0;

  mmc_init();

  for(;;)

  {

    //CModulSDCard_sdGlue_PERM();

  }

  // if code, behind this line, is executed, something went wrong ...

}

int mmc_init()

{

int i;

//SETUP_SPI(SPI_MASTER | SPI_H_TO_L | SPI_CLK_DIV_4 | SPI_SS_DISABLED);

//*0x94 |= 0x40;                          // set CKE = 1 - clock idle low

//*0x14 &= 0xEF;                          // set CKP = 0 - data valid on rising edge

SPI1CON1 = 0x00;

SPI1CON1bits.SMP = 0;

SPI1CON1bits.CKE = 1;

SPI1CON1bits.MSTEN = 1;

SPI1CON1bits.CKP = 0;

SPI1CON1bits.SPRE2=1;

SPI1CON1bits.SPRE1=0;

SPI1CON1bits.SPRE0=0;

SPI1CON1bits.PPRE1 = 1;

SPI1CON1bits.PPRE0 = 1;

SPI1STATbits.SPIEN = 1;

//OUTPUT_HIGH(PIN_C2);                    // set SS = 1 (off)

SDCS = 1; // MMC deaktiviert

for(i=0;i<10;i++)                       // initialise the MMC card into SPI mode by sending clks on

{

        SPI_WRITE(0xFF);

}

//OUTPUT_LOW(PIN_C2);                     // set SS = 0 (on) tells card to go to spi mode when it receives reset

SDCS = 0; // MMC aktiviert

SPI_WRITE(0x40);                        // send reset command

SPI_WRITE(0x00);                        // all the arguments are 0x00 for the reset command

SPI_WRITE(0x00);

SPI_WRITE(0x00);

SPI_WRITE(0x00);

SPI_WRITE(0x95);                        // precalculated checksum as we are still in MMC mode

//puts("Sent go to SPI\n\r");

if(mmc_response(0x01)==1) return 1;     // if = 1 then there was a timeout waiting for 0x01 from the mmc

//puts("Got response from MMC\n\r");

i = 0;

while((i < 255) && (mmc_response(0x00)==1))     // must keep sending command if response

{

        SPI_WRITE(0x41);                // send mmc command one to bring out of idle state

        SPI_WRITE(0x00);                // all the arguments are 0x00 for command one

        SPI_WRITE(0x00);

        SPI_WRITE(0x00);

        SPI_WRITE(0x00);

        SPI_WRITE(0xFF);                // checksum is no longer required but we always send 0xFF

        i++;

}

if(i >= 254) 

  return 1;                   // if >= 254 then there was a timeout waiting for 0x00 from the mmc

//puts("Got out of idle response from MMC\n\r");

//OUTPUT_HIGH(PIN_C2);                    // set SS = 1 (off)

SDCS = 1; // MMC deaktiviert

SPI_WRITE(0xFF);                        // extra clocks to allow mmc to finish off what it is doing

//OUTPUT_LOW(PIN_C2);                     // set SS = 0 (on)

SDCS = 0; // MMC aktiviert

        SPI_WRITE(0x50);                // send mmc command one to bring out of idle state

        SPI_WRITE(0x00);

        SPI_WRITE(0x00);

        SPI_WRITE(0x02);                // high block length bits - 512 bytes

        SPI_WRITE(0x00);                // low block length bits

        SPI_WRITE(0xFF);                // checksum is no longer required but we always send 0xFF

if((mmc_response(0x00))==1) return 1;

//OUTPUT_HIGH(PIN_C2);            // set SS = 1 (off)

SDCS = 1; // MMC deaktiviert

//puts("Got set block length response from MMC\n\r");

return 0;

}