main.c

FS7805 使用SD卡的demo

/**********************************************************
*File: main.c
*Content: FS7805 read/write SD sector

*data:   01/12/2007       DEREK    V0.1
*data:   03/22/2007       Jason    V0.2	   Modified FIFO to DMA_FIFO
*
*
* Copyright (c) 2006 Fameg, Inc. All rights reserved
***********************************************************/

#define ALLOCATE_EXTERN 
#include "fs7805.h"
#include "fs7805regs.h"

#include "include.h"

INT16U i;
BYTE Status;

void main(void)
{
	
	McuInit();
	Timer0Init();
	SdInit();

	{
		if (SdCardExist()) //if card is inserted
		{ 
			SdReset();
			Status = SdCardDetect();
			Status = SdGoIdentifyState();
			Status = SdGoStandbyState();
			Status = SdReadCSD(); //
			Status = SdGoTransferState();
//card initialization complet.----------------------------

     		for(i=0;i<512;i++)
				((BYTE xdata *)DMA_FIFOA0)[i]=8*i+0;
			for(i=0;i<512;i++)
				((BYTE xdata *)DMA_FIFOA1)[i]=8*i+1;
			for(i=0;i<512;i++)
				((BYTE xdata *)DMA_FIFOB0)[i]=8*i+2;
			for(i=0;i<512;i++)
				((BYTE xdata *)DMA_FIFOB1)[i]=8*i+3;

//continous write-------------------------------------------
			
			SectorStart=0;
			SectorCount=4;

			SDMI_BUFBASE=(DMA_FIFOA0>>8); 
			Status = SdWriteSector();
			SectorCount--;

			SDMI_BUFBASE=(DMA_FIFOA1>>8); 
			Status = SdWriteNextSector();
			SectorCount--;

			SDMI_BUFBASE=(DMA_FIFOB0>>8); 
			Status = SdWriteNextSector();
			SectorCount--;

			SDMI_BUFBASE=(DMA_FIFOB1>>8); 
			Status = SdWriteNextSector();
			SectorCount--;	  
//continous read-------------------------------------------
			SectorStart=0;
			SectorCount=4;
			SDMI_BUFBASE=(DMA_FIFOC0>>8);
			Status = SdReadSector();
			SectorCount--;
			SDMI_BUFBASE=(DMA_FIFOC1>>8);
			Status = SdReadNextSector();

			SectorCount--;
			SDMI_BUFBASE=(DMA_FIFOD0>>8);
			Status = SdReadNextSector();

			SectorCount--;
			SDMI_BUFBASE=(DMA_FIFOD1>>8);
			Status = SdReadNextSector();
			SectorCount--;

		}
	}
	while(1);
}