Simulating SPI on keil using ARM9

Why wouldn't you just develop and debug the code on the real board, with real hardware attached to it?

If you have a support contract with Keil, you could try that avenue, but it's a 6 year old device so hardly a good case for a lot of engineering effort.

Why wouldn't you just develop and debug the code on the real board, with real hardware attached to it?

If you have a support contract with Keil, you could try that avenue, but it's a 6 year old device so hardly a good case for a lot of engineering effort.

#include <S3C2440.H>
#include<stdio.h>
void sd_card_init(void);
void spi_delay(void);
int main()
{ //pclk is 12MHZ

GPECON=0x0a800000; //clk mosi miso 13 12 11

GPGCON=0x00000030;//ss 2

SPCON0=0x18;//set the clk & enable the master

SPPRE0=0x0e;//set the clk at 400 khz

SPPIN0=0x01;//derive the mosi level

//************************************************************** sd_card_init(); return 0;
} void sd_card_init()
{ unsigned char x;

unsigned int cmd0[]={0x40 ,0x00 , 0x00, 0x00 ,0x00 ,0x95};

unsigned int cmd55[]={0x77 ,0x00 , 0x00, 0x00 ,0x00 ,0x95};

unsigned int cmd41[]={0x69 ,0x00 , 0x00, 0x00 ,0x00 ,0x95};

GPEDAT=GPEDAT||0x1000;

//mosi=1;

GPGDAT=GPGDAT||0x0004;

//cs=1;

spi_delay();

//********************RESET COMMAND************************

GPGDAT=GPGDAT||0xFFFB;

//cs=0;

for(x=0;x<6;x++)

SPTDAT0=cmd0[x];

//**********************check if card is ready or not.******************

while((SPRDAT0==0x01)||(SPSTAT0&0x01==0))

{ for(x=0;x<6;x++)

SPTDAT0=cmd55[x];

for(x=0;x<6;x++)

SPTDAT0=cmd41[x]; }
}

void spi_delay()
{

unsigned char i,j; //wait for 74 clk cycles or more

for(i=0;i<255;i++)

for(j=0;j<255;j++);
}

this is my code which I am trying to simulate on keil but since SPI
peripheral is not available there for this board it is of no use
As sir has said.I have even tested this using oscilloscope but
could not even find the clock...so anything else has o be done please tell
me I am in great need of your comments and help.
I am eagerly waiting for the answers...

Thank you
Roger

You'll want to review your clock and pin configurations. Perhaps you can seek some better examples.

This is NOT how to do a bitwise OR GPEDAT=GPEDAT||0x1000;

You'd want to use a single |

Thanks for pointing out sir

It will be very helpful if you could post the examples here
especially of S3C2440A board where they have used the SPI interface for Sd card.
Also if you could help me on the aspect that if somehow I store the data in sd card and if I wanted to open it as a text file on the desktop how it might be possible if the card is FAT compatible.

the card is FAT compatible

that is a big problem. try not to get a card that is ext2 or ntfs. they are more expensive and are not compatible in lots of things. like cameras and videos and fridges and things like that.

thanks sir

But if there are any solutions then they will be appreciated.

Thank you

Roger

Hello all

Well I have waited a lot almost a week for answers but I suppose all the geeky heads have gone
to take a rest..If someone has awaken..
Please help me..

Thanks

Roger