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mmcsd always read value 00
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msa

Joined: 07 Apr 2010
Posts: 15

Posted: Sun Dec 19, 2010 7:47 am

Reply with quote

Hi all

I would like to thank my colleagues who help me in solving my problems

Schematic :
------------

Code:

#include <18F2550.h>

#FUSES NOWDT //No Watch Dog Timer
#FUSES INTRC_IO //Internal RC Osc
#FUSES NOPROTECT //Code not protected from reading
#FUSES DEBUG // Debug mode for ICD
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOMCLR    //Master Clear pin enabled
#FUSES NOPUT
#use delay(clock=8M)

#use rs232(baud=9600, xmit=PIN_C6,Errors)

#use fast_io(b)
#use fast_io(c)
#define MMCSD_PIN_SCL PIN_B1 //o
#define MMCSD_PIN_SDI PIN_B0 //i
#define MMCSD_PIN_SDO PIN_C7 //o
#define MMCSD_PIN_SELECT PIN_A0 //o

#include <mmcsd.c>

#include <input.c>

void main(void)
{

BYTE value;
int32 address;

setup_oscillator(OSC_8MHZ);

printf("\r\n\n Wellcome \r\n\n");

if (mmcsd_init())
{
printf("Could not init the MMC/SD!!!!");
while(TRUE);
}

for(address = 0x00000000; address <= 0x0000010; address++)
{
mmcsd_read_byte(address, &value) ;

         printf("Add --> %lX , HexVal --> %X, AsciiVal--> %c\n\r", address, value, value) ;

}

do {

} while (TRUE);
}

Data

Code:

Wellcome

Add --> 00000000 , HexVal --> EB, AsciiVal--> ë
Add --> 00000001 , HexVal --> 3C, AsciiVal--> <
Add --> 00000002 , HexVal --> 90, AsciiVal-->
Add --> 00000003 , HexVal --> 4D, AsciiVal--> M
Add --> 00000004 , HexVal --> 53, AsciiVal--> S
Add --> 00000005 , HexVal --> 44, AsciiVal--> D
Add --> 00000006 , HexVal --> 4F, AsciiVal--> O
Add --> 00000007 , HexVal --> 53, AsciiVal--> S
Add --> 00000008 , HexVal --> 35, AsciiVal--> 5
Add --> 00000009 , HexVal --> 2E, AsciiVal--> .
Add --> 0000000A , HexVal --> 30, AsciiVal--> 0
Add --> 0000000B , HexVal --> 00, AsciiVal-->
Add --> 0000000C , HexVal --> 02, AsciiVal-->
Add --> 0000000D , HexVal --> 04, AsciiVal-->
Add --> 0000000E , HexVal --> 06, AsciiVal-->
Add --> 0000000F , HexVal --> 00, AsciiVal-->
Add --> 00000010 , HexVal --> 02, AsciiVal-->

jacqueskleynhans

Joined: 10 Apr 2008
Posts: 109
Location: Cape Town, South Africa

Software SPI
Posted: Tue Mar 08, 2011 1:38 pm

Can this example be used with an software spi interface ?? Regards Jacques _________________ "THE ONLY EASY DAY WAS YESTERDAY"

jacqueskleynhans

Joined: 10 Apr 2008
Posts: 109
Location: Cape Town, South Africa


Posted: Wed Mar 09, 2011 7:54 am

cool got it to work _________________ "THE ONLY EASY DAY WAS YESTERDAY"

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