Lpc2000

Hello,

I'm trying to make an SD card to work with the lpc2106 and later want
to implement FAT.
The problem is I don't get any response of the SD card when I try to
initialize it.

Maybe somebody can disover what I'm doing wrong?

here is the code:

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void ActivateSD(void){
	
	unsigned int ii=0;
	unsigned char resp, i;
	unsigned char status;
	
	print("Activating SD Card....\n\n");

	// Turn off SD Card
	SD_power_off;

	// Wait for power to really go down
	for(ii = 0; ii; ii++);
	for(ii = 0; ii; ii++);
	for(ii = 0; ii; ii++);
	for(ii = 0; ii; ii++);

	// Turn on SD Card
	SD_power_on;

	// Wait for power to really come up
	for(status = 0; status < 10; ++status)
	{
		for(ii = 0; ii; ii++);
		for(ii = 0; ii; ii++);
		for(ii = 0; ii; ii++);
		for(ii = 0; ii; ii++);
	}
	
	
	
	
	
	for(i=1; i<=10; i++){	                //try 10 times to wake up the card
		
		SD_disable;			//CS high
		
		InitSequence();			//send 80 clocks
		
		SD_enable;			//CS low
		
		SD_SendCommand(CMD0,0,0,0,0); //send Reset command
		
		resp = SD_Response();
		if( resp == 0x01 ){          //wait for R1 response to be 0x01
			break;
		}
		else{
		
		}
		
	}
	
	spiSendByte(0xFF);		   // Response received, send the required 8
clocks after the response to finish up (page 5-6 Sandisk Manual)

	
	if(i>10){
		SD_disable;
		print("SD activation failed\n");
	}
	else{
		print("SD activation successfully\n");
		
		while( resp != 0x00){	                 //try sending CMD1 until
response R1 is 0x00
			SD_SendCommand(CMD1,0,0,0,0);	 //activate card initialization process
			resp = SD_Response();
			spiSendByte(0xFF);	         //send required 8 clocks
			if(resp==0x00){		         // Ready
				print("SD successfully activated!!!\n");
				break;
			}
		}
		
		if(resp != 0x00){
			print("Error: ");
			print("0x"); printnum(16, 8, 0, '0', resp); print("\n");
		}
		
	}
	print("\n-------end-----------\n");
}


unsigned char SD_Response(void) {
	unsigned char 	i;
	unsigned char 	resp;	
	
	for(i=0; i<10; i++) {
		resp = spiGetByte();
		if(resp != 0xFF) {
			return resp;
		}
	}		
	return 0xFF;
}

void SD_SendCommand(unsigned char command, unsigned char arg_a,
unsigned char arg_b, unsigned char arg_c, unsigned char arg_d) {	
	spiSendByte(command);
	spiSendByte(arg_a);
	spiSendByte(arg_b);
	spiSendByte(arg_c);
	spiSendByte(arg_d);
	spiSendByte(0x95);				// correct CRC for first command in SPI after
that CRC is ignored, so no problem with always sending 0x95
}

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