Picproje Elektronik Sitesi

mrb, MMC kart için bulduğum kodları proteusta simüle ettim ve resimdeki gibi bir hata verdi
(http://s30.postimg.cc/a4cmpwoql/Ads_z.jpg) (http://postimg.cc/image/a4cmpwoql/)


/*
* sd_card.c
*
* Created: 15.12.2014 23:53:18
*  Author: BERKAY
*/

#define F_CPU 1000000UL
#include <stdio.h>
#include <avr/io.h>
#include <avr/pgmspace.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include "lcd.h"

#define DI 6      // Port B bit 6 (pin7): data in (data from MMC)
#define DT 5      // Port B bit 5 (pin6): data out (data to MMC)
#define CLK 7     // Port B bit 7 (pin8): clock
#define CS 4      // Port B bit 4 (pin5): chip select for MMC

volatile char chars[512];
volatile int x;

FILE lcd_str = FDEV_SETUP_STREAM(lcd_putc, NULL, _FDEV_SETUP_WRITE);

void ini_SPI(void) {

DDRB &= ~(_BV(DI));       //input
DDRB |= _BV(CLK);         //outputs
DDRB |= _BV(DT);          //outputs
DDRB |= _BV(CS);          //outputs
SPCR |= _BV(SPE);         //SPI enable
SPCR |= _BV(MSTR);        //Master SPI mode
//SPCR &= ~(_BV(SPR1));     //fosc/16
//SPCR |= _BV(SPR0);        //fosc/16
//SPSR &= ~(_BV(SPI2X));    //speed is not doubled
PORTB |= (1<<4);      //Enable CS pin for the SD card

sei();
}


char SPI_sendchar(char chr) {

PORTB &= ~(1<<PB4);

SPDR = chr;
while(!(SPSR & (1<<SPIF)));

PORTB |= (1<<PB4);
}


char Command(char cmd, uint16_t ArgH, uint16_t ArgL, char crc ) {

SPI_sendchar(0xFF);
SPI_sendchar(cmd);
SPI_sendchar((uint8_t)(ArgH >> 8));
SPI_sendchar((uint8_t)ArgH);
SPI_sendchar((uint8_t)(ArgL >> 8));
SPI_sendchar((uint8_t)ArgL);
SPI_sendchar(crc);
SPI_sendchar(0xFF);
return SPI_sendchar(0xFF);                // Returns the last byte received
}


void ini_SD(void) {

char i;
PORTB |= _BV(CS);                    //disable CS
for(i=0; i < 10; i++)
SPI_sendchar(0x1F);                // Send 10 * 5 = 50 clock pulses 250 kHz
PORTB &= ~(_BV(CS));                 //enable CS
for(i=0; i < 2; i++)
SPI_sendchar(0x1F);                // Send 2 * 5 = 10 clock pulses 250 kHz
Command(0x40,0,0,0x95);              // reset
idle_no:
if (Command(0x41,0,0,0xFF) !=0)
goto idle_no;                        //idle = L?
SPCR &= ~(_BV(SPR0));                //fosc/4
}


int write(void) {

int i;
uint8_t wbr;

//Set write mode 512 bytes
if (Command(0x58,0,25,0xFF) !=0) {
//Determine value of the response byte 0 = no errors
return 1;
//return value 1 = error
}
SPI_sendchar(0xFF);
SPI_sendchar(0xFF);
SPI_sendchar(0xFE);
//recommended by posting a terminator sequence [2]

//write data from chars [512] tab
uint16_t ix;
char r1 =  Command(0x58,0,25,0xFF);
for (ix = 0; ix < 50000; ix++) {
if (r1 == (char)0x00) break;
r1 = SPI_sendchar(0xFF);
}
if (r1 != (char)0x00) {
return 1;
//return value 1 = error
}
//recommended by the control loop [2]
SPI_sendchar(0xFF);
SPI_sendchar(0xFF);
wbr = SPI_sendchar(0xFF);
//write block response and testing error
wbr &= 0x1F;
//zeroing top three indeterminate bits 0b.0001.1111
if (wbr != 0x05) { // 0x05 = 0b.0000.0101
//write error or CRC error
return 1;
}
while(SPI_sendchar(0xFF) != (char)0xFF);
//wait for the completion of a write operation to the card
return 0;

}


int read(void) {

int i;
uint16_t ix;
char r1 =  Command(0x51,0,25,0xFF);
for (ix = 0; ix < 50000; ix++) {
if (r1 == (char)0x00) break;
r1 = SPI_sendchar(0xFF);
}
if (r1 != (char)0x00) {
return 1;
}
//read from the card will start after the framework
while(SPI_sendchar(0xFF) != (char)0xFE);
for(i=0; i < 25; i++) {
while(!(SPSR & (1<<SPIF)));
chars[i] = SPDR;
SPDR = SPI_sendchar(0xFF);
}
SPI_sendchar(0xFF);
SPI_sendchar(0xFF);
return 0;
}


int main(void)
{
DDRD=0XFF; // for LCD

_delay_us(10);

lcd_init(LCD_DISP_ON);

stdout = stdin = &lcd_str;

ini_SPI();
ini_SD();

   
lcd_clrscr();

lcd_gotoxy(4,0);
lcd_puts("SD Card");

    while(1){

   
    }
}


yok mu yardım eden?